CN111215562B - Steel wire cutting device - Google Patents

Abstract

The invention discloses a steel wire cutting device, and belongs to the field of oil and gas field equipment. The device includes: the pin (6) is connected with the main body (2), and the pin (6) is positioned in a first sliding groove (51) on the upper outer sleeve (5); the pull rod (3) is positioned in the main body (2), the first end (41) of the stop piece (4) is movably connected with the first side wall of the first groove arranged on the side wall of the pull rod (3), and the second end (42) of the stop piece (4) penetrates through the first limiting groove (52) on the upper outer sleeve (5) and the second limiting groove (23) on the main body (2); the first end (53) of the upper outer sleeve (5) is connected with the first end (81) of the mandrel (8), and the second end (82) of the mandrel (8) is positioned in the lower outer sleeve (7); the side wall of the mandrel (8) is provided with a first chute (84), and the side wall of the lower outer sleeve (7) is provided with a second chute (72). The steel wire cutting device can rapidly cut off steel wires falling in the well.

Description

Steel wire cutting device

Technical Field

The invention relates to the field of oil and gas field equipment, in particular to a steel wire cutting device.

Background

In the process of oil and gas field development, a tool is often required to be put into a well to measure and regulate parameters or repair the well. When a tool is put into a well, one end of a steel wire is usually connected to the tool, the other end of the steel wire is connected to a test vehicle, the tool is put into the well through the test vehicle and the steel wire, and after the tool put into the well is completed in the well, the tool put into the well is pulled out of the well through the test vehicle and the steel wire. However, as the well wall often becomes waxed and fouled, the tool may become stuck in place on the wall of the well as the tool is being lowered into the well as it is being pulled upwardly from the well. At this point, as the tool is pulled further upward, the wire connecting the tool may break away from the weak link of the wire, causing the tool and the wire partially connected to the tool to fall out of the well and the wire falling out of the well may accumulate on the tool.

After the tool falls in the well, the fishing tool needs to be used for fishing the tool falling in the well, at the moment, the fishing tool needs to be connected to the tool, and the steel wire falling in the well is accumulated on the tool, so the steel wire falling in the well can obstruct the connection between the fishing tool and the tool, and the steel wire falling in the well needs to be cut off in time so as to conveniently fish the tool by using the fishing tool after clearing the accumulated steel wire on the tool.

At present, steel wires falling off in a well are often cut off by a cutting device. The cutting device comprises a weighting rod and a blade, one end of the weighting rod is connected with the blade, and the other end of the weighting rod is connected with the steel wire. Go into the well with this cutting device through the steel wire, the weight bar can produce great impact force when the whereabouts, under the effect of this impact force, the blade of being connected with the weight bar can cut off the steel wire that drops in the well. However, since water is often present in the well, the weight bar needs to overcome the resistance of the water in the well when falling, so that the impact force generated when the weight bar falls can be reduced, and the blade is not easy to cut off the steel wire falling in the well.

Disclosure of Invention

The embodiment of the invention provides a steel wire cutting device, which can solve the problem that steel wires falling in a well are not easy to cut in the related technology. The technical scheme is as follows:

in one aspect, there is provided a wire cutting apparatus, the apparatus comprising: the rope comprises a rope cap, a main body, a pull rod, a stop piece, an upper outer sleeve, a pin, a lower outer sleeve, a mandrel, a pin shaft and a bottom plug;

the rope cap is used for being connected with a steel wire on a test vehicle, the first end of the main body is connected with the rope cap, the second end of the main body is positioned in the upper outer sleeve, a first sliding groove is formed in the side wall of the upper outer sleeve, the pin is connected with the main body, and the pin is positioned in the first sliding groove;

a first limiting groove is formed in the side wall of the upper outer sleeve, a second limiting groove is formed in the side wall of the main body, the pull rod is located in the main body, a first groove is formed in the side wall of the pull rod, a first end of the stop piece is movably connected with the first side wall of the first groove, and a second end of the stop piece penetrates through the first limiting groove and the second limiting groove;

the first end of the upper outer sleeve is connected with the first end of the mandrel, the second end of the mandrel is positioned in the lower outer sleeve, the first end of the lower outer sleeve is connected with the bottom plug, two first through holes with opposite positions are arranged on the side wall of the lower outer sleeve, a second sliding groove is arranged on the side wall of the mandrel, and the pin shaft penetrates through the two first through holes and the second sliding groove;

a first inclined groove is formed in the side wall of the mandrel, a second inclined groove is formed in the side wall of the lower outer sleeve, and the inclination of the first inclined groove is the same as that of the second inclined groove; the bottom of first chute is located the top of first chute with between the second end of dabber, the bottom of second chute is located target site in the second chute with between the first end of lower overcoat, the target site of second chute is be located in the second chute position between the both ends of second chute.

Optionally, the apparatus further comprises: an upper joint;

the first end of the upper joint is connected with the rope cap, and the second end of the upper joint is connected with the first end of the main body.

Optionally, the apparatus further comprises: a weight bar;

the first end of the weighting rod is connected with the rope cap, and the second end of the weighting rod is connected with the first end of the main body.

Optionally, a first outer edge is arranged on the side wall of the pull rod, a second outer edge is arranged on the inner wall of the main body, and the device further comprises: a first spring;

the first spring is sleeved on the pull rod and is positioned between the side wall of the pull rod and the inner wall of the main body;

the first outer edge is located between the rope cap and the second outer edge, a first end of the first spring is in contact with the first outer edge, and a second end of the first spring is in contact with the second outer edge.

Optionally, the apparatus further comprises: a second spring;

a first end of the second spring is installed in the top of the first groove at a position close to the second sidewall of the first groove, and a second end of the stopper piece is contactable with a second end of the second spring.

Optionally, a second through hole is provided at the first end of the stop piece, a second groove is provided on the first sidewall of the first groove, two third through holes with opposite positions are provided on two sidewalls of the second groove, and the device further includes: a first screw;

the first screw passes through the second through hole and the two third through holes.

Optionally, a fourth through hole is provided on the side wall of the pin, a fifth through hole is provided on a portion of the side wall of the main body near the second end of the main body, and the apparatus further includes: a second screw;

the second screw passes through the fourth through hole and the fifth through hole.

Optionally, the apparatus further comprises: short-circuit connection;

the first end of short circuit with go up the first end of overcoat and be connected, the second end of short circuit with the first end of dabber is connected.

Optionally, be provided with the blind hole on the second end of short circuit, be close to on the outer wall of short circuit be provided with the sixth through-hole on the position of the second end of short circuit, the device still includes: stabilizing the nail;

the first end of the mandrel is located in the blind hole and connected with the blind hole, and the stable nail penetrates through the sixth through hole and then contacts with the side wall of the mandrel.

Optionally, be close to on the outer wall of short circuit be provided with the seal groove on the position of the first end of short circuit, the device still includes: a seal ring;

the first end of short circuit is located go up the overcoat in, the sealing washer is located in the seal groove, the sealing washer with go up the inner wall contact of overcoat.

Optionally, the apparatus further comprises: the first end of the pressing cap is provided with a third outer edge, and the side wall of the mandrel is provided with a fourth outer edge;

the pressing cap is sleeved on the mandrel, the third outer edge is clamped on the second end of the lower outer sleeve, and the second end of the pressing cap is connected with the lower outer sleeve;

the third spring sleeve is established on the dabber, the third spring be located the lateral wall of dabber with between the inner wall of overcoat down, the first end of third spring with the second end contact of pressing the cap, the second end of third spring with the contact of fourth outer edge.

Optionally, a plurality of first anchor teeth are arranged on a portion, close to the bottom plug, of the inner wall of the lower outer sleeve, and the device further comprises: a lock spring sleeve;

the spring locking sleeve is positioned in the lower outer sleeve, and a first end of the spring locking sleeve is connected with a second end of the mandrel;

and a plurality of second anchor teeth are arranged on the outer wall of the lock spring sleeve and close to the second end of the lock spring sleeve, and the plurality of first anchor teeth and the plurality of second anchor teeth can be clamped.

The technical scheme provided by the embodiment of the invention can at least bring the following beneficial effects: in the embodiment of the invention, the rope cap is used for being connected with the steel wire on the test vehicle, the first end of the main body is connected with the rope cap, the second end of the main body is positioned in the upper outer sleeve, the first end of the upper outer sleeve is connected with the first end of the mandrel, the second end of the mandrel is positioned in the lower outer sleeve, and the first end of the lower outer sleeve is connected with the bottom plug, so that the steel wire cutting device can be put into the well through the steel wire connected with the test vehicle, and the steel wire cutting device put into the well can also be pulled out from the well through the steel wire. In addition, as the side wall of the upper outer sleeve is provided with the first sliding groove, the pin is connected with the main body and is positioned in the first sliding groove, the side wall of the upper outer sleeve is provided with the first limiting groove, the side wall of the main body is provided with the second limiting groove, the pull rod is positioned in the main body, the side wall of the pull rod is provided with the first groove, the first end of the stop piece is movably connected with the first side wall of the first groove, and the second end of the stop piece penetrates through the first limiting groove and the second limiting groove, when the main body moves upwards, the main body and the upper outer sleeve can be limited by the second end of the stop piece to stop moving upwards. When the rope cap is lifted by applying force, the main body is driven by the rope cap to rapidly move upwards, and the groove wall at the lowest point of the second limiting groove can extrude the stop piece, so that the stop piece rotates towards the direction close to the bottom of the first groove. After the stop piece rotates to a certain degree, the second end of the stop piece is no longer positioned in the first limiting groove and can be positioned in the upper outer sleeve, and the main body, the pull rod and the stop piece are all positioned in the upper outer sleeve, so that the main body is unlocked and can move upwards at an accelerated speed. When the pin on the main body moves to the groove wall at the highest point of the first sliding groove and continues to move upwards, the pin collides with the groove wall at the highest point of the first sliding groove and generates a large instantaneous impact force. Under the action of the instantaneous impact force, the upper outer sleeve can move upwards rapidly, so that the mandrel connected with the upper outer sleeve can be driven to move upwards rapidly. Because be provided with two first through-holes that the position is relative again on the lateral wall of lower overcoat, be provided with the second sliding tray on the lateral wall of dabber, the round pin axle passes two first through-holes and second sliding tray, so the dabber only can upwards move rapidly for lower overcoat, can not take place to rotate, thereby make first chute only can upwards move rapidly for the second chute, can stagger rapidly with the second chute on vertical, and can not stagger with the second chute on horizontal, first chute is after staggering rapidly with the second chute on vertical, can press from both sides tightly rapidly and cut off the steel wire of card in first chute and second chute. When the mandrel 8 is moved rapidly upwards relative to the lower jacket 7, the steel wire caught in the first and second inclined grooves 84, 72 is clamped and can be cut rapidly.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a steel wire cutting device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another steel wire cutting device provided by an embodiment of the invention.

Reference numerals:

1: rope cap, 2: a main body, 3: pull rod, 4: stop piece, 5: an upper outer sleeve, 6: pin, 7: lower outer sleeve, 8: mandrel, 9: pin shaft, 10: bottom block, 11: upper joint, 13: first spring, 14: second spring, 15: first screw, 16: second screw, 17: short circuit, 18: nail stabilization, 19: seal ring, 20: pressing cap, 21: first end of the body, 22: second end of the body, 23: second limit groove, 24: third spring, 25: spring sleeve, 26: second outer edge, 31: first outer edge, 41: first end of the stop piece, 42: second end of the stop piece, 51: first slide groove, 52: first limit groove, 53: first end of upper jacket, 71: first end of lower casing, 72: second chute, 81: first end of mandrel, 82: second end of mandrel, 83: second slide groove, 84: first chute, 85: fourth outer edge, 111: first end of upper joint, 112: second end of upper joint, 171: shorted first end, 172: shorted second end, 201: and a third outer edge.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a wire cutting apparatus according to an embodiment of the present invention, and particularly, is a sectional view when a first sliding groove 51 is located on the left or right side of the apparatus. Referring to fig. 1, the apparatus includes: the rope cap comprises a rope cap 1, a main body 2, a pull rod 3, a stop piece 4, an upper outer sleeve 5, a pin 6, a lower outer sleeve 7, a mandrel 8, a pin shaft 9 and a bottom plug 10. The rope cap 1 is used for being connected with a steel wire on a test vehicle, the first end 21 of the main body 2 is connected with the rope cap 1, the second end 22 of the main body 2 is positioned in the upper outer sleeve 5, the side wall of the upper outer sleeve 5 is provided with a first sliding groove 51, the pin 6 is connected with the main body 2, and the pin 6 is positioned in the first sliding groove 51; a first limiting groove 52 is formed in the side wall of the upper outer sleeve 5, a second limiting groove 23 is formed in the side wall of the main body 2, the pull rod 3 is located in the main body 2, a first groove is formed in the side wall of the pull rod 3, a first end 41 of the stop piece 4 is movably connected with the first side wall of the first groove, and a second end 42 of the stop piece 4 penetrates through the first limiting groove 52 and the second limiting groove 23; the first end 53 of the upper outer sleeve 5 is connected with the first end 81 of the mandrel 8, the second end 82 of the mandrel 8 is positioned in the lower outer sleeve 7, the first end 71 of the lower outer sleeve 7 is connected with the bottom plug 10, two first through holes with opposite positions are arranged on the side wall of the lower outer sleeve 7, a second sliding groove 83 is arranged on the side wall of the mandrel 8, and the pin shaft 9 penetrates through the two first through holes and the second sliding groove 83; a first inclined groove 84 is formed in the side wall of the mandrel 8, a second inclined groove 72 is formed in the side wall of the lower outer sleeve 7, and the inclination of the first inclined groove 84 is the same as that of the second inclined groove 72; the bottom of the first chute 84 is located between the top of the first chute 84 and the second end 82 of the mandrel 8, the bottom of the second chute 72 is located between a target location in the second chute 72 and the first end 71 of the lower outer jacket 7, and the target location of the second chute 72 is the location in the second chute 72 between the two ends of the second chute 72.

It should be noted that the structure of the rope cap 1 may be similar to that of the pen cap, and a through hole may be respectively disposed on the top of the rope cap 1 and the side wall of the rope cap 1. In practical application, the first end of steel wire is connected on the test car, and the second end of steel wire can pass the through-hole that sets up on the top of fag end 1 earlier, exposes outside the outer wall of fag end 1 after passing the through-hole that sets up on the lateral wall of fag end 1 again, can knot the steel wire that exposes outside the outer wall of fag end 1 afterwards, makes it fix outside the outer wall of fag end 1 to realize being connected between steel wire and the fag end 1, and then realize being connected of steel wire and this steel wire cutting device. Therefore, the steel wire cutting device can be put into the well through the steel wire, and the steel wire cutting device put into the well can also be pulled out of the well through the steel wire. In addition, the cap 1 may have an internal thread, and the first end 21 of the body 2 may have an external thread, through which the cap 1 and the first end 21 of the body 2 may be screwed.

In addition, the diameter of the second end 22 of the main body 2 may be slightly smaller than the inner diameter of the upper outer sleeve 5, as long as it is ensured that the second end 22 of the main body 2 can be just positioned in the upper outer sleeve 5 and the second end 22 of the main body 2 can just move in the upper outer sleeve 5. The outer diameter of the upper outer sleeve 5 and the outer diameter of the main body 2 can be slightly smaller than the inner diameter of an oil pipe in a well, and the steel wire cutting device can be smoothly put into the oil pipe. Further, in order to facilitate cleaning of impurities in the main body 2, a cleaning groove (e.g., two cleaning grooves in opposite positions) may be provided on a side wall of the main body 2 at a position between the first end 21 and the second end 22. Thus, a cleaning tool can be inserted into the main body 2 from the cleaning tank to clean impurities in the main body 2.

The first slide groove 51 may be a single first slide groove provided in the side wall of the upper cover 5, or may be two first slide grooves provided in the side wall of the upper cover 5 and opposed to each other. The size of the first sliding groove 51 can be set according to actual needs.

Wherein, when the first sliding groove 51 is a first sliding groove provided on the side wall of the upper outer cover 5, a blind hole may be provided on the side wall of the main body 2, in which one end of the pin 6 is located, and the other end of the pin 6 is located in the first sliding groove. Further, in order to prevent the pin 6 from loosening during sliding, the pin 6 and the main body 2 may be integrally formed, or an internal thread may be provided on the blind hole, and an external thread may be provided on the pin 6, through which the pin 6 and the main body 2 may be screwed.

In the case that the first sliding grooves 51 are two first sliding grooves provided on the side wall of the upper outer cover 5 and located at opposite positions, a through hole may be provided on the side wall of the main body 2, the pin 6 may pass through the through hole, the middle portion of the pin 6 is located in the through hole, and the two ends of the pin 6 are located in the two first sliding grooves one by one. Further, in order to avoid loosening of the pin 6 during sliding, an internal thread may be provided on this through hole, and an external thread may be provided on the pin 6, through which the pin 6 and the main body 2 may be screwed.

The cross section of the pin 6 may be circular, the size of the pin 6 may be set according to the size of the first sliding groove 51, as long as it is ensured that when the first sliding groove 51 is a first sliding groove provided on the side wall of the upper outer sleeve 5, one end of the pin 6 may be located in the first sliding groove and may slide in the first sliding groove, or, as long as it is ensured that when the first sliding groove 51 is two first sliding grooves provided on the side wall of the upper outer sleeve 5 and opposite to each other, two ends of the pin 6 may be located in the two first sliding grooves one by one and may slide in the two first sliding grooves, which is not specifically limited in the embodiment of the present invention.

The first stopper groove 52 may be the same groove as the first slide groove 51, or may be a single groove provided in the side wall of the upper outer shell 5 between the first slide groove 51 and the second end of the upper outer shell 5. The size of the first limiting groove 52 and the size of the second limiting groove 23 can be set according to actual requirements, as long as it is ensured that the second end 42 of the stop piece 4 can pass through the first limiting groove 52 and the second limiting groove 23. Wherein, the shape of the stop piece 4 can be a thin sheet, the second end 42 of the stop piece 4 is tilted and inclined relative to other parts of the stop piece 4, the lowest point of the second end 42 of the stop piece 4 is connected with other parts of the stop piece 4, and the lowest point of the second end 42 of the stop piece 4 is located between the first end 53 of the upper outer sleeve 5 and the highest point of the second end 42 of the stop piece 4. Wherein, the size of the first groove can be set according to actual needs. In addition, although the first end 41 of the catch 4 is movably connected to the first sidewall of the first groove, in order to make the pin 6 connected to the main body 2 collide with the highest sidewall of the first sliding groove 51 and generate a large instantaneous impact force when moving to the highest sidewall of the first sliding groove 51 and continuing to move upward, the connection between the first end 41 of the catch 4 and the first sidewall of the first groove should be tight, so that the second end 42 of the catch 4 is not easily rotated toward the bottom of the first groove when the lowest sidewall of the second limit groove 23 presses the catch 4. Only when the force pressing the catch 4 is greater than the friction between the first end 41 of the catch 4 and the first sidewall of the first groove, the second end 42 of the catch 4 will rotate toward the bottom of the first groove, and at this time, the force pressing the catch 4 is greater, so that a greater instant impact force will be generated after the pin 6 collides with the groove wall of the highest point of the first sliding groove 51.

In addition, the size of the cross section of the pull rod 3 may be slightly smaller than that of the main body 2, as long as it is ensured that the pull rod 3 can be just positioned in the main body 2 and just can move in the main body 2.

In addition, the connection between the first end 53 of the upper outer sleeve 5 and the first end 81 of the mandrel 8 may be by welding, screwing, or the like. The diameter of the mandrel 8 may be slightly smaller than the inner diameter of the lower outer sleeve 7, as long as it is ensured that the second end 82 of the mandrel 8 can just be located inside the lower outer sleeve 7 and just can move inside the lower outer sleeve 7.

In addition, in order to facilitate the running of the wire cutting device into the well and the passing of the wire cutting device through the wires accumulated on the tool dropped in the well, the end of the bottom plug 10 remote from the second end of the lower casing 7 may be tapered. The connection between the first end 71 of the lower outer sleeve 7 and the bottom plug 10 can be welding, threaded connection and the like. The outer diameter of the lower outer sleeve 7 can be slightly smaller than the inner diameter of an oil pipe in a well, and the steel wire cutting device can be smoothly put into the oil pipe.

Further, the size of the second sliding groove 83 may be set according to actual needs. The size of the cross section of the pin shaft 9 may be set according to the width of the second sliding groove 83, the length of the pin shaft 9 may be set according to the outer diameter of the lower outer sleeve 7, and the aperture of the two first through holes opposite to each other on the lower outer sleeve 7 may be set according to the size of the cross section of the pin shaft 9, as long as it is ensured that the pin shaft 9 can just pass through the two first through holes and the second sliding groove 83, and the pin shaft 9 can move in the second sliding groove 83, which is not specifically limited in the embodiment of the present invention.

Finally, the bottom of the second chute 72 may be at a lower height than the target location in the second chute 72, which may be the highest point of the second chute 72. The inclination of the second chute 72 can be set according to actual needs, as long as it is guaranteed that steel wires falling into the well can be hung in the second chute 72 and are not easy to fall. The bottom of the first chute 84 is lower than the top of the first chute 84, and the depth of the first chute 84 can be set according to actual needs, so long as it is ensured that the steel wires hung in the second chute 72 can be clamped when the steel wires are hung in the second chute 72 and the first chute 84 moves away from the bottom plug 10. In addition, the number of the first inclined grooves 84 and the number of the second inclined grooves 72 may be equal, the number of the first inclined grooves 84 and the number of the second inclined grooves 72 may be one or more, and at least one first inclined groove 84 and at least one second inclined groove 72 are arranged in one-to-one correspondence. When the number of the first and second chutes 84 and 72 is plural, both the plural first chutes 84 and the plural second chutes 72 may catch the wire, so that the efficiency of the wire cutting device cutting the wire may be improved. Furthermore, the walls of the first inclined groove 84 and the second inclined groove 72 are relatively sharp, so that when the steel wires are jammed in the first inclined groove 84 and the second inclined groove 72 and the first inclined groove 84 moves away from the bottom block 10, a sharp cutting edge is formed between the first inclined groove 84 and the second inclined groove 72, and the steel wires can be easily cut.

When the wire cutting device is installed, after the pull rod 3 is positioned in the main body 2, the first end 41 of the stop piece 4 is movably connected with the first side wall of the first groove on the pull rod 3, and the second end 42 of the stop piece 4 penetrates through the second limiting groove 23 on the main body 2. Then, the second end 22 of the main body 2 is positioned in the upper casing 5, and the main body 2 is rotated to align the second limiting groove 23 of the main body 2 with the first limiting groove 52 of the upper casing 5, so that the second end 42 of the catch 4 can pass through the first limiting groove 52 and the second limiting groove 23, and the pin 6 for connecting the main body 2 is positioned in the first sliding groove 51 of the upper casing 5. The first end 53 of the upper jacket 5 is then connected to the first end 81 of the mandrel 8 and the second end 82 of the mandrel 8 is positioned within the lower jacket 7. When the lower outer sleeve 7 is rotated, the two oppositely located first through holes on the lower outer sleeve 7 are aligned with the second sliding grooves 83 on the spindle 8, the pin 9 is inserted through the two first through holes and the second sliding grooves 83, and at the same time, the first inclined grooves 84 on the spindle 8 are aligned with the second inclined grooves 72 on the lower outer sleeve 7. Finally, the bottom plug 10 is attached to the first end 71 of the lower casing 7. After the steel wire cutting device is installed, the steel wire cutting device can be lowered into the well to cut the steel wire.

In practical application, when the steel wire falling into the well needs to be cut off through the steel wire cutting device, the free end of the steel wire connected to the test vehicle can be connected with the rope cap 1, and then the steel wire cutting device is put into the well through the steel wire. When the wire cutting apparatus encounters a blockage during running into the well (the bottom plug 10 of the wire cutting apparatus touches a tool dropped into the well or the wire cutting apparatus is located in a wire accumulated in the well), the wire dropped into the well may get stuck into the first chute 84 and the second chute 72 of the wire cutting apparatus. Thereafter, the wire cutting device may be pulled upward by a wire connected to the wire cutting device. Because the first inclined slot 84 and the second inclined slot 72 are clamped with steel wires, the lower outer sleeve 7 is basically fixed, and the rope cap 1 drives the main body 2 to move upwards. Since the second end 22 of the main body 2 is located in the upper outer sleeve 5, the pull rod 3 is located in the main body 2, the stop piece 4 is arranged on the pull rod 3, and the second end 42 of the stop piece 4 passes through the first stop groove 52 on the upper outer sleeve 5 and the second stop groove 23 on the main body 2, when the main body 2 moves upwards, both the main body 2 and the upper outer sleeve 5 are limited by the second end 42 of the stop piece 4 to stop moving upwards. At this time, the rope cap 1 can be lifted by force, and the main body 2 can move upwards rapidly under the drive of the rope cap 1. Since the first end 41 of the catch 4 is movably connected to the first sidewall of the first groove on the pull rod 3, when the main body 2 moves upward rapidly, the groove wall of the lowest point of the second limiting groove 23 will press the catch 4, so that the catch 4 rotates toward the bottom of the first groove. When the stop piece 4 is rotated to a certain degree, the second end 42 of the stop piece 4 is no longer located in the first limiting groove 52 and is located in the upper outer sleeve 5, and at this time, the main body 2, the pull rod 3 and the stop piece 4 are all located in the upper outer sleeve 5, so that the main body 2 is unlocked, and the main body 2 is accelerated to move upwards. When the pin 6 connected to the main body 2 moves to the groove wall of the highest point of the first sliding groove 51 and continues to move upward, it collides with the groove wall of the highest point of the first sliding groove 51 and generates a large instantaneous impact force. Under the action of the instant impact force, the upper outer sleeve 5 can move upwards rapidly, so that the mandrel 8 connected with the upper outer sleeve 5 can be driven to move upwards rapidly. When the mandrel 8 moves rapidly upwards, the first inclined groove 84 on the mandrel 8 also moves rapidly upwards, and the first inclined groove 84 and the second inclined groove 72 are rapidly staggered, so that the steel wire clamped in the first inclined groove 84 and the second inclined groove 72 can be rapidly clamped and cut off. In addition, if the wire is not cut by a single instantaneous impact force, the wire cutting device can be pulled up again after the stopper piece 4 is reset, so that repeated vibration and multiple cutting can be performed, and finally the purpose of cutting the wire can be achieved.

It should be noted that, when cutting off the steel wire falling into the well by the steel wire cutting device, the rope cap 1 is used to connect with the steel wire on the testing vehicle, the first end 21 of the main body 2 is connected with the rope cap 1, the second end 22 of the main body 2 is located in the upper outer sleeve 5, the first end 53 of the upper outer sleeve 5 is connected with the first end 81 of the mandrel 8, the second end 82 of the mandrel 8 is located in the lower outer sleeve 7, and the first end 71 of the lower outer sleeve 7 is connected with the bottom plug 10, so that the steel wire cutting device can be lowered into the well by the steel wire connected with the testing vehicle, and the steel wire cutting device lowered into the well can also be pulled out from the well by the steel wire. In addition, because the side wall of the upper outer sleeve 5 is provided with the first sliding groove 51, the pin 6 is connected with the main body 2, the pin 6 is positioned in the first sliding groove 51, the side wall of the upper outer sleeve 5 is provided with the first limiting groove 52, the side wall of the main body 2 is provided with the second limiting groove 23, the pull rod 3 is positioned in the main body 2, the side wall of the pull rod 3 is provided with the first groove, the first end 41 of the stop piece 4 is movably connected with the first side wall of the first groove, and the second end 42 of the stop piece 4 passes through the first limiting groove 52 and the second limiting groove 23, when the main body 2 moves upwards, the main body 2 and the upper outer sleeve 5 are both limited by the second end 42 of the stop piece 4 and stop moving upwards. When the rope cap 1 is lifted by applying force, the main body 2 is driven by the rope cap 1 to move upwards rapidly, and the groove wall of the lowest point of the second limiting groove 23 can extrude the stop piece 4, so that the stop piece 4 rotates towards the direction close to the bottom of the first groove. When the stop piece 4 is rotated to a certain degree, the second end 42 of the stop piece 4 is no longer located in the first limiting groove 52 and is located in the upper outer sleeve 5, and at this time, the main body 2 is unlocked, and the main body 2 is accelerated to move upwards. When the pin 6 on the main body 2 moves to the groove wall of the highest point of the first sliding groove 51 and continues to move upward, it collides with the groove wall of the highest point of the first sliding groove 51 and generates a large instantaneous impact force. Under the action of the instant impact force, the upper outer sleeve 5 can move upwards rapidly, so that the mandrel 8 connected with the upper outer sleeve 5 can be driven to move upwards rapidly. Because the side wall of the lower outer sleeve 7 is provided with two first through holes at opposite positions, the side wall of the mandrel 8 is provided with a second sliding groove 83, and the pin shaft 9 passes through the two first through holes and the second sliding groove 83, the mandrel 8 only moves upwards rapidly relative to the lower outer sleeve 7 and does not rotate, so that the first inclined groove 84 only moves upwards rapidly relative to the second inclined groove 72, and is rapidly staggered with the second inclined groove 72 in the longitudinal direction and is not staggered with the second inclined groove 72 in the transverse direction, after the first inclined groove 84 is rapidly staggered with the second inclined groove 72 in the longitudinal direction, steel wires clamped in the first inclined groove 84 and the second inclined groove 72 can be clamped and cut off rapidly, thereby avoiding unnecessary pipe detection operation (namely pulling an oil pipe with a tool clamped and accumulated steel wires on the tool up from a well, and cleaning the steel wires in the oil pipe on the ground), thereby reducing the operating cost.

Optionally, for ease of manufacture and installation, the device may also include an upper fitting 11, as shown in fig. 2. The first end 111 of the upper joint 11 is connected with the rope cap 1, and the second end 112 of the upper joint 11 is connected with the first end 21 of the main body 2.

The first end 111 of the upper joint 11 and the second end 112 of the upper joint 11 may be provided with external threads, the first end 21 of the main body 2 and the rope cap 1 may be provided with internal threads, the first end 111 of the upper joint 11 and the rope cap 1 may be screwed, and the second end 112 of the upper joint 11 and the first end 21 of the main body 2 may be screwed.

Optionally, the device may also include a weighted rod (not shown). A first end of the weight bar may be connected with the cap 1 and a second end of the weight bar may be connected with the first end 21 of the body 2. Of course, the second end of the weight bar may also be connected to the first end 111 of the upper joint 11.

It should be noted that, in order to make the pin 6 connected to the main body 2 move to the highest groove wall of the first sliding groove 51 and continue moving upward, and collide with the highest groove wall of the first sliding groove 51 to generate a large instantaneous impact force, a weight bar may be provided between the rope cap 1 and the first end 21 of the main body 2, or a weight bar may be provided between the rope cap 1 and the first end 111 of the upper joint 11. When the weight bar is arranged between the rope cap 1 and the first end 21 of the main body 2 or between the rope cap 1 and the first end 111 of the upper joint 11, only when the force of pulling up the main body 2 overcomes the gravity of the weight bar and the resistance of the groove wall at the highest point of the first limiting groove 52 to the second end 42 of the stop piece 4, the groove wall at the lowest point of the second limiting groove 23 can extrude the stop piece 4, so that the second end 42 of the stop piece 4 rotates towards the direction close to the bottom of the first groove, and the main body 2 can be unlocked instantly. Thus, the weight lever increases the force required to instantaneously release the main body 2. After the main body 2 is unlocked under a large force, the pin 6 moves up rapidly along with the main body 2, and a large instantaneous impact force is generated when the pin 6 collides with the groove wall at the highest point of the first sliding groove 51, so that the steel wire cutting device has higher efficiency in cutting the steel wire.

Wherein, the weighting bar can be made of steel. The size of the weighting bar can be set according to actual needs. When the weight bar sets up between the first end 21 of cap for rope 1 and main part 2, the first end of weight bar can carry out threaded connection etc. with cap for rope 1, and threaded connection, welding etc. can be carried out with the first end 21 of main part 2 to the second end of weight bar. When the weight bar is arranged between the rope cap 1 and the first end 111 of the upper joint 11, the first end of the weight bar and the rope cap 1 can be in threaded connection and the like, and the second end of the weight bar and the first end 111 of the upper joint 11 can be in threaded connection, welded and the like.

Alternatively, as shown in fig. 2, a first outer edge 31 may be provided on the sidewall of the pull rod 3, and a second outer edge 26 may be provided on the inner wall of the main body 2, and the device may further include the first spring 13. The first spring 13 is sleeved on the pull rod 3 and is positioned between the side wall of the pull rod 3 and the inner wall of the main body 2; the first outer edge 31 is located between the rope cap 1 and the second outer edge 26, the first end of the first spring 13 is in contact with the first outer edge 31, and the second end of the first spring 13 is in contact with the second outer edge 26.

It should be noted that the inner diameter of the first spring 13 may be slightly larger than the diameter of the pull rod 3, the outer diameter of the first spring 13 may be slightly smaller than the inner diameter of the main body 2, and parameters such as the expansion length of the first spring 13 may be set according to actual requirements, as long as it is ensured that the first spring 13 can be exactly sleeved on the pull rod 3 and can be exactly located between the side wall of the pull rod 3 and the inner wall of the main body 2, which is not specifically limited in this embodiment of the present invention.

It should be noted that, since the first spring 13 is sleeved on the pull rod 3 and located between the side wall of the pull rod 3 and the inner wall of the main body 2, the first end of the first spring 13 contacts the first outer edge 31, and the second end of the first spring 13 contacts the second outer edge 26, when the second end 42 of the stop piece 4 passes through the first limiting groove 52 and the second limiting groove 23, if the main body 2 is pulled up, the first spring 13 is compressed because the position of the first outer edge 31 is not changed and the position of the second outer edge 26 moves up. At this time, only when the force of pulling up the main body 2 overcomes the elastic force of the first spring 13 and the resistance of the groove wall of the highest point of the first limiting groove 52 to the second end 42 of the catch 4, the groove wall of the lowest point of the second limiting groove 23 presses the catch 4, so that the second end 42 of the catch 4 rotates toward the bottom of the first groove, and the main body 2 is released from the jam instantly. Thus, the first spring 13 increases the force required to instantaneously release the main body 2. After the main body 2 is unlocked under a large force, the pin 6 moves up rapidly along with the main body 2, and a large instantaneous impact force is generated when the pin 6 collides with the groove wall at the highest point of the first sliding groove 51, so that the steel wire cutting device has higher efficiency in cutting the steel wire.

Optionally, as shown in fig. 2, the device may further comprise a second spring 14. The first end of the second spring 14 is mounted in the top of the first recess at a position close to the second side wall of the first recess, and the second end 42 of the catch 4 is able to come into contact with the second end of the second spring 14.

It should be noted that when the second end 42 of the catch 4 is rotated toward the bottom of the first groove by the pressing action of the groove wall of the lowest point of the second limiting groove 23, the second end 42 of the catch 4 will contact the second end of the second spring 14 and compress the second spring 14 after rotating to a certain extent. At this time, only when the force of pulling up the main body 2 overcomes the elastic force of the second spring 14 and the resistance of the groove wall of the highest point of the first limiting groove 52 to the second end 42 of the catch 4, the groove wall of the lowest point of the second limiting groove 23 will press the catch 4 into the upper case 5, so that the main body 2 will be released from the jam instantly. The provision of the second spring 14 thus increases the force required to momentarily release the main body 2. After the main body 2 is unlocked under a large force, the pin 6 moves up rapidly along with the main body 2, and a large instantaneous impact force is generated when the pin 6 collides with the groove wall at the highest point of the first sliding groove 51, so that the steel wire cutting device has higher efficiency in cutting the steel wire.

In addition, in order to avoid the change in the position of the second spring 14 when the pull rod 3 is moved or when the stopper 4 is rotated and brought into contact with the second spring 14, a recess may be provided in the top of the first recess at a position close to the second side wall of the first recess, in which recess the first end of the second spring 14 is fixed.

Optionally, as shown in fig. 2, a second through hole is provided at the first end 41 of the stop piece 4, a second groove is provided at the first sidewall of the first groove, and two third through holes are provided at opposite positions at two sidewalls of the second groove, and the apparatus further includes: a first screw 15. The first screw 15 passes through the second through hole and the two third through holes.

It should be noted that the size of the second groove can be set according to actual needs.

In addition, the hole diameters of the two third through holes may be the same, and may be slightly larger than the diameter of the first screw 15, as long as it is ensured that the first screw 15 can just pass through the two third through holes. The diameter of the second through hole may be slightly larger than the diameter of the first screw 15, as long as it is ensured that the stop piece 4 can rotate around the first screw 15 after the first screw 15 just passes through the second through hole, which is not specifically limited in the embodiment of the present invention.

In order to generate a large instantaneous impact force when the pin 6 collides with the groove wall at the highest point of the first sliding groove 51, the force required to rotate the second end 42 of the locking piece 4 in the direction approaching the bottom of the first groove may be increased. Specifically, two nuts may be screwed into both ends of the first screw 15 one by one after the first screw 15 passes through the second through hole and the two third through holes to be fastened.

Alternatively, as shown in fig. 2, when the pin 6 and the main body 2 are not integrally formed, in order to realize the connection between the pin 6 and the main body 2, a fourth through hole may be provided on a side wall of the pin 6, and a fifth through hole may be provided on a side wall of the main body 2 near the second end 22 of the main body 2, and the apparatus may further include: a second screw 16. The second screw 16 passes through the fourth through hole and the fifth through hole.

It should be noted that the hole diameters of the fourth through hole and the fifth through hole may be slightly larger than the diameter of the second screw 16, as long as it is ensured that the second screw 16 can just pass through the fourth through hole and the fifth through hole, and this is not particularly limited in the embodiment of the present invention.

In order to make the connection between the pin 6 and the main body 2 more stable, two nuts may be screwed into the two ends of the second screw 16 one by one after the second screw 16 passes through the fourth through hole and the fifth through hole.

Optionally, for convenience of processing and installation, as shown in fig. 2, the apparatus may further include: a short circuit 17. A first end 171 of the short 17 is connected to the first end 53 of the upper jacket 5 and a second end 172 of the short 17 is connected to the first end 81 of the mandrel 8.

It should be noted that the connection between the first end 171 of the short circuit 17 and the first end 53 of the upper outer sleeve 5 may be welding, snap connection, screw connection, etc. The connection between the second end 172 of the short circuit 17 and the first end 81 of the mandrel 8 may also be a weld, a snap connection, a threaded connection, etc. When the second end 172 of the short circuit 17 is connected to the first end 81 of the mandrel 8 by a screw, a blind hole may be formed in the second end 172 of the short circuit 17, and the first end 81 of the mandrel 8 may be located in the blind hole and connected to the blind hole by a screw.

Further, in order to effectively avoid the short circuit 17 from tripping the mandrel 8 when the mandrel 8 is driven by the short circuit 17, as shown in fig. 2, the apparatus may further include: the second end 172 of the stabilizing nail 18 and the short joint 17 is provided with a blind hole. A sixth through hole may be formed in a portion, close to the second end 172 of the short circuit 17, of the outer wall of the short circuit 17, the first end 81 of the mandrel 8 is located in the blind hole and is in threaded connection with the blind hole, and the stable nail 18 passes through the sixth through hole and then contacts with the side wall of the mandrel 8.

It should be noted that the diameter of the sixth through hole may be slightly larger than the diameter of the steady nail 18, as long as it is ensured that the steady nail 18 can just pass through the sixth through hole, and can contact with the side wall of the mandrel 8 after the steady nail 18 passes through the sixth through hole. Further, in order to avoid the stable nail 18 from loosening and even dropping, an internal thread can be arranged on the sixth through hole, and an external thread is arranged on the stable nail 18, so that the stable nail 18 and the sixth through hole can be in threaded connection, and the fixation of the position of the stable nail 18 is ensured.

In addition, because the stable nail 18 passes through the sixth through hole and then contacts with the side wall of the mandrel 8, static friction exists between the stable nail 18 and the side wall of the mandrel 8, and therefore, only when the static friction force between the stable nail 18 and the side wall of the mandrel 8 is overcome, the short circuit 17 and the mandrel 8 can rotate relatively. And only when the sliding friction force between the stable nail 18 and the side wall of the mandrel 8 is overcome, the short joint 17 can be disengaged from the mandrel 8. From this, surely setting up of nail 18 can effectively avoid the relative rotation between short circuit 17 and the dabber 8, can effectively avoid taking place to drop out between short circuit 17 and the dabber 8 then.

Optionally, as shown in fig. 2, a sealing groove may be disposed on a portion of the outer wall of the short circuit 17, which is close to the first end 171 of the short circuit 17, and the apparatus may further include: and a seal ring 19. The first end 171 of the short circuit 17 is positioned in the upper outer sleeve 5, the sealing ring 19 is positioned in the sealing groove, and the sealing ring 19 is contacted with the inner wall of the upper outer sleeve 5.

It should be noted that the first end 53 of the upper outer sleeve 5 may be provided with a blind hole, and the first end 171 of the short circuit 17 may be located in the blind hole and screwed with the blind hole.

In addition, the depth of the sealing groove can be set according to actual needs. The inner diameter of the sealing ring 19 may be equal to or slightly larger than the diameter of the first end 171 of the short circuit 17 minus the depth of the sealing groove, and the outer diameter of the sealing ring 19 may be equal to or slightly smaller than the inner diameter of the upper outer sleeve 5, as long as it is ensured that the sealing ring 19 can be just positioned in the sealing groove, the inner wall of the sealing ring 19 can be just attached to the bottom of the sealing groove, and the outer wall of the sealing ring 19 can be just attached to the inner wall of the upper outer sleeve 5, which is not specifically limited in the embodiment of the present invention. The number of the sealing grooves is equal to that of the sealing rings 19, the number of the sealing grooves can be one or more, correspondingly, the number of the sealing rings 19 can also be one or more, at least one sealing ring 19 can be located in at least one sealing groove one by one, and the at least one sealing ring 19 is in contact with the inner wall of the upper outer sleeve 5.

It is worth to be noted that a sealing groove is formed in a position, close to the first end 171 of the short circuit 17, on the outer wall of the short circuit 17, the sealing ring 19 is arranged in the sealing groove, and the sealing ring 19 is in contact with the inner wall of the upper outer sleeve 5, so that sealing between the outer wall of the short circuit 17 and the inner wall of the upper outer sleeve 5 can be achieved. Thus, impurities, corrosive media and the like in the well cannot enter the gap between the first end 171 of the short 17 and the first end 53 of the upper outer jacket 5, so that the connection between the first end 171 of the short 17 and the first end 53 of the upper outer jacket 5 is not broken, and the stability of the connection between the first end 171 of the short 17 and the first end 53 of the upper outer jacket 5 is ensured.

Optionally, as shown in fig. 2, the apparatus may further include: the first end of the pressing cap 20 is provided with a third outer edge 201, and the side wall of the mandrel 8 is provided with a fourth outer edge 85. The pressing cap 20 is sleeved on the mandrel 8, the third outer edge 201 is clamped on the second end of the lower outer sleeve 7, and the second end of the pressing cap 20 is connected with the lower outer sleeve 7; the third spring 24 is sleeved on the mandrel 8, the third spring 24 is located between the side wall of the mandrel 8 and the inner wall of the lower outer sleeve 7, a first end of the third spring 24 is in contact with a second end of the press cap 20, and a second end of the third spring 24 is in contact with the fourth outer edge 85.

It should be noted that the inner diameter of the pressing cap 20 may be slightly larger than the diameter of the mandrel 8, as long as it is ensured that the pressing cap 20 can be just sleeved on the mandrel 8. The outer diameter of the second end of the pressing cap 20 may be slightly smaller than the inner diameter of the lower outer sleeve 7 as long as it is ensured that the second end of the pressing cap 20 can be located in the lower outer sleeve 7. The second end of the pressing cap 20 can be provided with external threads, the lower outer sleeve 7 can be provided with internal threads, and the second end of the pressing cap 20 and the lower outer sleeve 7 can be in threaded connection. The outer diameter of the third outer rim 201 may be slightly larger than or equal to the outer diameter of the second end of the lower outer casing 7, as long as it is ensured that the third outer rim 201 can be clamped on the second end of the lower outer casing 7.

In addition, the inner diameter of the third spring 24 may be slightly larger than the diameter of the mandrel 8, the outer diameter of the third spring 24 may be slightly smaller than the inner diameter of the lower outer sleeve 7, and parameters such as the expansion length of the third spring 24 may be set according to actual requirements, as long as it is ensured that the third spring 24 can be exactly sleeved on the mandrel 8, and the third spring 24 can be exactly located between the inner wall of the lower outer sleeve 7 and the side wall of the mandrel 8, which is not specifically limited in the embodiment of the present invention.

It should be noted that when the wire cutting device encounters resistance during downward movement, the lower outer casing 7 is substantially stationary, and when the wire cutting device is lifted, the spindle 8 moves upward relative to the lower outer casing 7, compressing the third spring 24 as the position of the second end of the gland 20 is unchanged and the fourth outer rim 85 moves upward. At this time, only when the force of lifting the wire cutting device overcomes the elastic force of the third spring 24 and the resistance of the groove wall of the highest point of the first limiting groove 52 to the second end 42 of the catch 4, the groove wall of the lowest point of the second limiting groove 23 presses the catch 4, so that the second end 42 of the catch 4 rotates toward the bottom of the first groove, and the main body 2 can be released from the card instantly. Thus, the provision of the third spring 24 further increases the force required to momentarily release the main body 2. After the main body 2 is unlocked under a large force, the pin 6 moves up rapidly along with the main body 2, and a large instantaneous impact force is generated when the pin 6 collides with the groove wall at the highest point of the first sliding groove 51, so that the steel wire cutting device has higher efficiency in cutting the steel wire. In addition, the provision of the pressing cap 20 can function to restrain the third spring 24 without increasing the difficulty of processing the lower outer jacket 7.

Alternatively, as shown in fig. 2, a plurality of first anchor teeth may be provided on the inner wall of the lower outer casing 7 near the bottom plug 10, and the device may further include: a lock spring sleeve 25. The lock spring sleeve 25 is positioned in the lower outer sleeve 7, and a first end of the lock spring sleeve 25 is connected with a second end 82 of the mandrel 8; a plurality of second anchor teeth are provided on the outer wall of the lock spring housing 25 at a position close to the second end of the lock spring housing 25, and the plurality of first anchor teeth and the plurality of second anchor teeth can be engaged with each other.

It should be noted that the outer diameter of the lock spring sleeve 25 may be slightly smaller than the inner diameter of the lower outer sleeve 7, as long as the lock spring sleeve 25 is ensured to be located in the lower outer sleeve 7. The first end of the lock spring sleeve 25 can be provided with a blind hole, the blind hole can be provided with an internal thread, the second end 82 of the mandrel 8 can be provided with an external thread, and the blind holes formed in the first end of the lock spring sleeve 25 and the second end 82 of the mandrel 8 can be in threaded connection through the internal thread and the external thread.

In addition, the cusp of each of the plurality of first anchors is located at a height lower than the root, and the cusp of each of the plurality of second anchors is located at a height lower than the root. The plurality of first anchor teeth and the plurality of second anchor teeth are matched with each other, and the size of the plurality of first anchor teeth and the size of the plurality of second anchor teeth may be set according to actual needs, as long as it is ensured that the lock spring sleeve 25 can move upward relative to the lower outer sleeve 7, and when the lock spring sleeve 25 moves downward relative to the lower outer sleeve 7, the plurality of first anchor teeth and the plurality of second anchor teeth can be engaged with each other, which is not particularly limited in the embodiment of the present invention.

It should be noted that the lock spring sleeve 25 is located in the lower outer sleeve 7, the first end of the lock spring sleeve 25 is connected to the second end 82 of the mandrel 8, a plurality of first anchor teeth are provided on the inner wall of the lower outer sleeve 7 near the bottom plug 10, and a plurality of second anchor teeth are provided on the outer wall of the lock spring sleeve 25 near the second end of the lock spring sleeve 25. When an upward pulling force is applied to the wire cutting device, but the pulling force does not unlock the main body 2, since the second end 42 of the stopping piece 4 still blocks on the groove wall of the highest point of the first limiting groove 52 on the upper outer sleeve 5, when the main body 2 is pulled up, the second end 42 of the stopping piece 4 drives the upper outer sleeve 5 to slightly move upwards, then the upper outer sleeve 5 drives the mandrel 8 to slightly move upwards relative to the lower outer sleeve 7, and at this time, the first inclined groove 84 slightly moves upwards relative to the second inclined groove 72, so that the steel wires blocked in the first inclined groove 84 and the second inclined groove 72 can be clamped. Because the mandrel 8 can drive the lock spring sleeve 25 to move upwards when moving upwards, when the upward force applied to the steel wire cutting device cannot enable the main body 2 to be unlocked instantly, the steel wire cutting device can be continuously pulled upwards with increased force after a slight pause, and in the process of the pause, if the mandrel 8 drives the lock spring sleeve 25 to move downwards slightly, the second anchor teeth can be downwards clamped with the first anchor teeth, so that the lock spring sleeve 25 and the mandrel 8 can be prevented from moving downwards relative to the lower outer sleeve 7, the situation that the steel wires clamped in the first inclined groove 84 and the second inclined groove 72 are loosened and even fall out of the first inclined groove 84 and the second inclined groove 72 can be avoided, and therefore, the success rate of cutting the steel wires by the steel wire cutting device is effectively guaranteed.

In the embodiment of the invention, as the rope cap 1 is used for being connected with the steel wire on the test trolley, the first end 21 of the main body 2 is connected with the rope cap 1, the second end 22 of the main body 2 is positioned in the upper outer sleeve 5, the first end 53 of the upper outer sleeve 5 is connected with the first end 81 of the mandrel 8, the second end 82 of the mandrel 8 is positioned in the lower outer sleeve 7, and the first end 71 of the lower outer sleeve 7 is connected with the bottom plug 10, the steel wire cutting device can be put into the well through the steel wire connected with the test trolley, and the steel wire cutting device put into the well can also be pulled out of the well through the steel wire. In addition, because the side wall of the upper outer sleeve 5 is provided with the first sliding groove 51, the pin 6 is connected with the main body 2, the pin 6 is positioned in the first sliding groove 51, the side wall of the upper outer sleeve 5 is provided with the first limiting groove 52, the side wall of the main body 2 is provided with the second limiting groove 23, the pull rod 3 is positioned in the main body 2, the side wall of the pull rod 3 is provided with the first groove, the first end 41 of the stop piece 4 is movably connected with the first side wall of the first groove, and the second end 42 of the stop piece 4 passes through the first limiting groove 52 and the second limiting groove 23, when the main body 2 moves upwards, the main body 2 and the upper outer sleeve 5 are both limited by the second end 42 of the stop piece 4 and stop moving upwards. When the rope cap 1 is lifted by applying force, the main body 2 is driven by the rope cap 1 to move upwards rapidly, and the groove wall of the lowest point of the second limiting groove 23 can extrude the stop piece 4, so that the stop piece 4 rotates towards the direction close to the bottom of the first groove. When the stop piece 4 is rotated to a certain degree, the second end 42 of the stop piece 4 is no longer located in the first limiting groove 52 and is located in the upper outer sleeve 5, and at this time, the main body 2 is unlocked, and the main body 2 is accelerated to move upwards. When the pin 6 on the main body 2 moves to the groove wall of the highest point of the first sliding groove 51 and continues to move upward, it collides with the groove wall of the highest point of the first sliding groove 51 and generates a large instantaneous impact force. Under the action of the instant impact force, the upper outer sleeve 5 can move upwards rapidly, so that the mandrel 8 connected with the upper outer sleeve 5 can be driven to move upwards rapidly. Because the side wall of the lower outer sleeve 7 is provided with two first through holes at opposite positions, the side wall of the mandrel 8 is provided with a second sliding groove 83, and the pin shaft 9 passes through the two first through holes and the second sliding groove 83, the mandrel 8 only moves upwards rapidly relative to the lower outer sleeve 7 and does not rotate, so that the first inclined groove 84 only moves upwards rapidly relative to the second inclined groove 72, and is rapidly staggered with the second inclined groove 72 in the longitudinal direction and is not staggered with the second inclined groove 72 in the transverse direction, after the first inclined groove 84 is rapidly staggered with the second inclined groove 72 in the longitudinal direction, steel wires clamped in the first inclined groove 84 and the second inclined groove 72 can be clamped and cut off rapidly, thereby avoiding unnecessary pipe detection operation (namely pulling an oil pipe with a tool clamped and accumulated steel wires on the tool up from a well, and cleaning the steel wires in the oil pipe on the ground), thereby reducing the operating cost.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (12)

1. A wire cutting apparatus, characterized in that the apparatus comprises: the rope fastening device comprises a rope cap (1), a main body (2), a pull rod (3), a stop piece (4), an upper outer sleeve (5), a pin (6), a lower outer sleeve (7), a mandrel (8), a pin shaft (9) and a bottom plug (10);

the rope cap (1) is used for being connected with a steel wire on a test vehicle, a first end (21) of the main body (2) is connected with the rope cap (1), a second end (22) of the main body (2) is located in the upper outer sleeve (5), a first sliding groove (51) is formed in the side wall of the upper outer sleeve (5), the pin (6) is connected with the main body (2), and the pin (6) is located in the first sliding groove (51);

a first limiting groove (52) is formed in the side wall of the upper outer sleeve (5), a second limiting groove (23) is formed in the side wall of the main body (2), the pull rod (3) is located in the main body (2), a first groove is formed in the side wall of the pull rod (3), a first end (41) of the stop piece (4) is movably connected with the first side wall of the first groove, and a second end (42) of the stop piece (4) penetrates through the first limiting groove (52) and the second limiting groove (23);

the first end (53) of the upper outer sleeve (5) is connected with the first end (81) of the mandrel (8), the second end (82) of the mandrel (8) is positioned in the lower outer sleeve (7), the first end (71) of the lower outer sleeve (7) is connected with the bottom plug (10), two first through holes which are opposite in position are formed in the side wall of the lower outer sleeve (7), a second sliding groove (83) is formed in the side wall of the mandrel (8), and the pin shaft (9) penetrates through the two first through holes and the second sliding groove (83);

a first inclined groove (84) is formed in the side wall of the mandrel (8), a second inclined groove (72) is formed in the side wall of the lower outer sleeve (7), and the inclination of the first inclined groove (84) is the same as that of the second inclined groove (72); the bottom of the first chute (84) is located between the top of the first chute (84) and the second end (82) of the mandrel (8), the bottom of the second chute (72) is located between a target location in the second chute (72) and the first end (71) of the lower outer jacket (7), and the target location of the second chute (72) is a location in the second chute (72) that is located between the two ends of the second chute (72).

2. The apparatus of claim 1, wherein the apparatus further comprises: an upper joint (11);

the first end (111) of the upper joint (11) is connected with the rope cap (1), and the second end (112) of the upper joint (11) is connected with the first end (21) of the main body (2).

3. The apparatus of claim 1, wherein the apparatus further comprises: a weight bar;

the first end of the weighting rod is connected with the rope cap (1), and the second end of the weighting rod is connected with the first end (21) of the main body (2).

4. The device according to claim 1, characterized in that a first outer rim (31) is provided on the side wall of the tie rod (3) and a second outer rim (26) is provided on the inner wall of the body (2), the device further comprising: a first spring (13);

the first spring (13) is sleeved on the pull rod (3) and is positioned between the side wall of the pull rod (3) and the inner wall of the main body (2);

the first outer edge (31) is located between the rope cap (1) and the second outer edge (26), a first end of the first spring (13) is in contact with the first outer edge (31), and a second end of the first spring (13) is in contact with the second outer edge (26).

5. The apparatus of claim 1, wherein the apparatus further comprises: a second spring (14);

a first end of the second spring (14) is mounted in the top of the first recess at a position close to the second side wall of the first recess, and a second end (42) of the stop tab (4) is contactable with a second end of the second spring (14).

6. The device according to claim 1, characterized in that the first end (41) of the stop tab (4) is provided with a second through hole, the first side wall of the first recess is provided with a second recess, and the two side walls of the second recess are provided with two third through holes in opposite positions, the device further comprising: a first screw (15);

the first screw (15) passes through the second through hole and the two third through holes.

7. The device according to claim 1, characterized in that the pin (6) is provided with a fourth through hole in its side wall and a fifth through hole in the side wall of the body (2) close to the second end (22) of the body (2), the device further comprising: a second screw (16);

the second screw (16) passes through the fourth through hole and the fifth through hole.

8. The apparatus of claim 1, wherein the apparatus further comprises: a short circuit (17);

the first end (171) of short circuit (17) with go up first end (53) of overcoat (5) and be connected, the second end (172) of short circuit (17) with first end (81) of dabber (8) are connected.

9. The device according to claim 8, characterized in that the second end (172) of the short circuit (17) is provided with a blind hole, and a sixth through hole is provided on the outer wall of the short circuit (17) near the second end (172) of the short circuit (17), and the device further comprises: a stabilizing nail (18);

the first end (81) of dabber (8) be located in the blind hole and with the blind hole is connected, steady nail (18) pass behind the sixth through-hole with the lateral wall contact of dabber (8).

10. The device of claim 8, wherein a seal groove is formed in the outer wall of the short circuit (17) near the first end (171) of the short circuit (17), and the device further comprises: a seal ring (19);

first end (171) of short circuit (17) are located go up in overcoat (5), sealing washer (19) are located in the seal groove, sealing washer (19) with the inner wall contact of going up overcoat (5).

11. The apparatus of claim 1, wherein the apparatus further comprises: the pressing cap (20) and the third spring (24), a third outer edge (201) is arranged at the first end of the pressing cap (20), and a fourth outer edge (85) is arranged on the side wall of the mandrel (8);

the pressing cap (20) is sleeved on the mandrel (8), the third outer edge (201) is clamped on the second end of the lower outer sleeve (7), and the second end of the pressing cap (20) is connected with the lower outer sleeve (7);

the third spring (24) is sleeved on the mandrel (8), the third spring (24) is located between the side wall of the mandrel (8) and the inner wall of the lower outer sleeve (7), the first end of the third spring (24) is in contact with the second end of the pressing cap (20), and the second end of the third spring (24) is in contact with the fourth outer edge (85).

12. The device according to claim 1, characterized in that said lower casing (7) has a plurality of first anchoring teeth on its inner wall, close to said bottom plug (10), said device further comprising: a lock spring sleeve (25);

the lock spring sleeve (25) is positioned in the lower outer sleeve (7), and a first end of the lock spring sleeve (25) is connected with a second end (82) of the mandrel (8);

and a plurality of second anchor teeth are arranged on the outer wall of the lock spring sleeve (25) and close to the second end of the lock spring sleeve (25), and the plurality of first anchor teeth and the plurality of second anchor teeth can be clamped.

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