CN221524765U - Reamer for petroleum drilling - Google Patents

Abstract

The utility model discloses a reamer for petroleum drilling, which is characterized by comprising an upper joint, a tool main body, a driving structure and a reamer blade; the upper joint is internally penetrated with a first channel, one end of the first channel is connected with an external tool and used for driving the upper joint to move in a well, the other end of the first channel is connected with a tool main body, a driving structure is arranged in the tool main body, a reaming blade is arranged in the tool main body, and the driving structure is abutted with the reaming blade; the driving structure comprises an overcurrent core shaft, a positioning disc, a piston, a reset spring and a push block, wherein the overcurrent core shaft is arranged inside the tool main body, the positioning disc is sleeved on the overcurrent core shaft and is in threaded connection with the inside of the tool main body, one end, far away from the upper joint, of the overcurrent core shaft is connected with the piston, the reset spring is sleeved on the piston, the piston is connected with the push block, and the push block is abutted against the reaming blade. The problem that selective reaming operation cannot be performed in the prior art is solved.

Description

Reamer for petroleum drilling

Technical Field

The disclosure relates to the technical field of petroleum drilling, in particular to a reamer for petroleum drilling.

Background

With reamers, also known as expander reaming bits. Is a tool for reaming a borehole while drilling in petroleum drilling. The upper reamer simultaneously reams and dresses the borehole wall as the lower bit drills. In the development and drilling process of petroleum and natural gas, the drilling depth is gradually increased, and the drilling faces more and more complex well structures and complex stratum structures, and the encountered problems are also more and more complex. Due to unstable well walls, extrusion of stratum and the like, the problems of reduced diameter of a well bore, difficulty in continuing a drilling process, reduced horizontal well bore and the like are frequently encountered.

Most of the prior ordinary reamer adopts a hydraulic principle, and a cutter body is opened under the condition of pump start to perform reaming operation, and the cutter body is retracted after pump stop to perform tripping operation. However, the reamer in the prior art has single operation instruction, can only perform reaming after entering a well, has the problem that selective reaming operation cannot be performed, for example, the reamer can perform reaming operation on a well wall stably without a reaming section, and thus the burden of equipment is increased; for example, when the cutter body is worn, only the reamer can be started to replace, but the reamer cannot be temporarily suspended, and the reamer can be started to replace together after the drill bit is worn.

Disclosure of utility model

The purpose of the present disclosure is to provide a reamer for petroleum drilling, which solves the problem that selective reaming operation cannot be performed in the prior art.

To achieve the above object, according to a first aspect of the present disclosure, there is provided a reamer for petroleum drilling, comprising an upper sub, a tool body, a driving structure, and a reamer blade;

the upper joint is internally penetrated with a first channel, one end of the first channel is connected with an external tool and used for driving the upper joint to move in a well, the other end of the first channel is connected with the tool main body, the driving structure is arranged in the tool main body, the reaming blade is arranged in the tool main body, and the driving structure is abutted against the reaming blade;

The driving structure comprises an overcurrent core shaft, a positioning disc, a piston, a reset spring and a push block, wherein the overcurrent core shaft is arranged inside the tool main body, the positioning disc is sleeved on the overcurrent core shaft and is in threaded connection with the inside of the tool main body, one end, away from the upper joint, of the overcurrent core shaft is connected with the piston, the reset spring is sleeved on the piston, the piston is connected with the push block, and the push block is in butt joint with the reaming blade.

In some embodiments, the tool body is internally perforated with a second channel, the upper joint is connected with the inner wall of the second channel, the first channel is communicated with the second channel, the overcurrent core shaft is arranged in the second channel, the inside of the overcurrent core shaft is perforated with a third channel, the third channel is communicated with the second channel, the positioning disk is connected with the inner wall of the second channel, the inside of the piston is provided with a diversion hole, one end of the diversion hole is communicated with the third channel, the other end of the diversion hole is communicated with the second channel, and the piston is abutted against the inner wall of the second channel.

In some embodiments, the piston includes a connection portion and a pushing portion, the flow guiding hole is disposed on the connection portion, the connection portion is connected with the flow-through mandrel, the connection portion is in contact with the inner wall of the second channel, the diameter of the pushing portion is smaller than that of the connection portion, a rectangular opening is formed in the surface of the pushing portion, the pushing block is disposed in the rectangular opening, the pushing block is flush with the surface of the pushing portion, and a mounting screw is disposed between the pushing block and the pushing portion in an axial direction perpendicular to the tool body.

In some embodiments, the tool body is provided with an annular protrusion, the annular protrusion is abutted to the pushing block, the annular protrusion is abutted to the pushing portion, a space between the annular protrusion and the connecting portion is a spring groove, a return spring is arranged in the spring groove, the return spring is sleeved on the pushing portion, one end of the return spring is abutted to the connecting portion, and the other end of the return spring is abutted to the annular protrusion.

In some embodiments, a placement bin is provided in the tool main body, the placement bin is communicated with the second channel, the reaming blade is arranged in the placement bin, a pin shaft is fixedly connected to the reaming blade, the pin shaft is rotationally connected with the placement bin, a clamp spring is arranged between the pin shaft and the placement bin, and a rectangular hole is provided in the outer surface of the tool main body for the reaming blade to rotate out.

In some embodiments, the portion of the push block located between the annular protrusion and the reamer blade is at the same height as the placement bin, and the portion of the push block abutting the reamer blade is arc-shaped.

In some embodiments, the reamer blade is notched to prevent one end of the reamer blade from being rotated out and the other end of the reamer blade from being raised above the tool body.

In some embodiments, the tool body is provided with a plurality of drainage holes, and the diameter of the drainage holes is larger than that of the mounting screw.

Through adopting above-mentioned technical scheme, when need carry out the reaming to the oil drilling, be connected oil well special drilling rod and top connection for the drilling rod drives the top connection and moves, after the instrument main part moves to the position that needs to carry out the reaming, apply pressure to the inside overcurrent dabber of instrument main part, make overcurrent dabber promote the piston to the reamer blade direction remove, thereby promote the kicking block and remove, afterwards the kicking block promotes the reamer blade and rotates, make the reamer blade roll out inside the instrument main part, then carry out the reaming to the drilling, after the reaming operation is finished, reset spring can promote the piston return, thereby drive the kicking block and upwards connect the directional reamer blade and rotate the return, accomplish the withdrawal of reamer blade.

The effect that can be realized through above structure is:

1. By arranging the overcurrent core shaft, the piston and the pushing block, the pushing block can be pushed to move through the transmission of force after the pressure is applied to the overcurrent core shaft, so that the purpose of pushing the reaming blade to extend out of the tool main body in a rotating way and performing reaming operation is achieved;

2. Through setting up reset spring, after the reaming operation is accomplished, accessible reset spring promotes the piston for the ejector pad resets, and the reaming blade rotates back inside the instrument main part under the state that does not have the ejector pad to promote, thereby reaches the effect with reaming blade recovery.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure.

In the drawings:

FIG. 1 is a schematic cross-sectional view of the overall structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the reamer blade of the present utility model in an open condition;

FIG. 3 is an enlarged view of FIG. 2 at A;

fig. 4 is a top view of the present reamer.

Reference numerals illustrate:

1. An upper joint; 101. a first channel; 2. a tool body; 21. a second channel; 22. drainage holes; 23. placing a bin; 24. a rectangular hole; 25. an annular protrusion; 3. an overcurrent mandrel; 31. a third channel; 4. a positioning plate; 5. a piston; 51. a deflector aperture; 52. a connection part; 53. a pushing part; 54. a rectangular opening; 6. installing a screw; 7. a return spring; 8. a pushing block; 9. a pin shaft; 10. reaming blades; 11. clamping springs; 12. a spring groove.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

The present disclosure provides a reamer for petroleum drilling, as shown in fig. 1 and 2, comprising an upper sub 1, a tool body 2, a driving structure, and a reamer blade 10; a first channel 101 penetrates through the upper joint 1, one end of the first channel 101 is connected with an external tool and is used for driving the upper joint 1 to move in a well, the other end of the first channel 101 is connected with the tool main body 2, the driving structure is arranged in the tool main body 2, the reaming blade 10 is arranged in the tool main body 2, and the driving structure is abutted against the reaming blade 10; the driving structure comprises an overcurrent mandrel 3, a positioning disc 4, a piston 5, a reset spring 7 and a push block 8, wherein the overcurrent mandrel 3 is arranged inside the tool main body 2, the positioning disc 4 is sleeved on the overcurrent mandrel 3 and is in threaded connection with the tool main body 2, one end, away from the upper joint 1, of the overcurrent mandrel 3 is connected with the piston 5, the reset spring 7 is sleeved on the piston 5, the piston 5 is connected with the push block 8, and the push block 8 is in butt joint with the reaming blade 10.

Through the structure, when the petroleum drilling needs to be reamed, the special drill rod for the oil well is connected with the upper connector 1, the drill rod drives the upper connector 1 to move, after the tool main body 2 moves to a position needing to be reamed, pressure is applied to the overflow mandrel 3 in the tool main body 2, the overflow mandrel 3 pushes the piston 5 to move towards the direction of the reaming blade 10, the push block 8 is pushed to move, then the push block 8 pushes the reaming blade 10 to rotate, the reaming blade 10 is enabled to rotate out of the tool main body 2, then the drilling is reamed, after the reaming operation is finished, the reset spring 7 can push the piston 5 to reset, and accordingly the push block 8 is driven to rotate and reset towards the reaming blade 10 in the direction of the upper connector 1, and retraction of the reaming blade 10 is completed.

In some embodiments, as shown in fig. 1 and fig. 2, the tool body 2 is internally perforated with a second channel 21, the upper joint 1 is connected with an inner wall of the second channel 21, the first channel 101 is communicated with the second channel 21, the over-current mandrel 3 is disposed in the second channel 21, the over-current mandrel 3 is internally perforated with a third channel 31, the third channel 31 is communicated with the second channel 21, the positioning disc 4 is connected with an inner wall of the second channel 21, a diversion hole 51 is formed in the piston 5, one end of the diversion hole 51 is communicated with the third channel 31, the other end of the diversion hole 51 is communicated with the second channel 21, and the piston 5 abuts against the inner wall of the second channel 21.

Through the above structure, the flow-through mandrel 3 can be placed inside the second channel 21, so that when reaming is performed, the upper joint 1 can flow through fluid, and the fluid can flow out from the flow-through holes 51 through the first channel 101, the second channel 21 and the third channel 31, and can also push the flow-through mandrel 3 to move.

In some embodiments, as shown in fig. 1 and fig. 2, the piston 5 includes a connection portion 52 and a pushing portion 53, the diversion hole 51 is disposed on the connection portion 52, the connection portion 52 is connected with the overcurrent mandrel 3, the connection portion 52 abuts against an inner wall of the second channel 21, a diameter of the pushing portion 53 is smaller than that of the connection portion 52, a rectangular opening 54 is formed in a surface of the pushing portion 53, the pushing block 8 is disposed in the rectangular opening 54, the pushing block 8 is flush with a surface of the pushing portion 53, and a mounting screw 6 is disposed between the pushing block 8 and the pushing portion 53 perpendicular to an axial direction of the tool main body 2.

Through the above structure setting, when carrying out the reaming operation, the overcurrent core shaft 3 promotes the piston 5 and then promotes the ejector pad 8, because ejector pad 8 sets up on piston 5 to use mounting screw 6 to fix ejector pad 8 and piston 5 together, so when promoting piston 5, also promote the ejector pad 8 simultaneously, thereby promote reaming blade 10 and roll out instrument main part 2.

In some embodiments, as shown in fig. 1, 2 and 3, the tool body 2 is provided with an annular protrusion 25, the annular protrusion 25 is abutted against the pushing block 8, the annular protrusion 25 is abutted against the pushing portion 53, a space between the annular protrusion 25 and the connecting portion 52 is a spring groove 12, a return spring 7 is disposed in the spring groove 12, the return spring 7 is sleeved on the pushing portion 53, one end of the return spring 7 is abutted against the connecting portion 52, and the other end of the return spring 7 is abutted against the annular protrusion 25.

Through the structure, when the reaming of the well is finished, the reaming blade 10 needs to be retracted, the pressure on the overcurrent mandrel 3 can be reduced, so that the reset spring 7 pushes the piston 5 to move towards the direction of the upper joint 1, and the reset spring 7 pushes the piston 5 and simultaneously moves along with the push block 8 due to the fact that the mounting screw 6 is arranged between the piston 5 and the push block 8, so that the reaming blade 10 returns, and the reaming blade 10 is retracted.

In some embodiments, as shown in fig. 1, 2 and 4, a placement bin 23 is formed inside the tool main body 2, the placement bin 23 is communicated with the second channel 21, the reaming blade 10 is disposed in the placement bin 23, a pin 9 is fixedly connected to the reaming blade 10, the pin 9 is rotatably connected to the placement bin 23, a clamp spring 11 is disposed between the pin 9 and the placement bin 23, and a rectangular hole 24 is formed on the outer surface of the tool main body 2 for the reaming blade 10 to rotate out.

Through the structure setting, the reamer blade 10 is arranged in the placing bin 23, the reamer blade 10 is protected when moving in the drilling well, meanwhile, the pin shaft 9 enables the reamer blade 10 to rotate in the placing bin 23, and when the reaming operation is needed, under the action of the push block 8 and the pin shaft 9, the reamer blade 10 can rotate out of the rectangular hole 24 through rotation to perform the reaming operation on the drilling well.

In some embodiments, as shown in fig. 1 and 2, a portion of the push block 8 located between the annular protrusion 25 and the reamer blade 10 is equal to the placement chamber 23, and a portion of the push block 8 abutting against the reamer blade 10 is arc-shaped.

Through the above structure arrangement, when the push block 8 pushes the reaming blade 10, the arc-shaped part can greatly increase the pushing of the reaming blade 10, so that the problem that the push block 8 prevents the reaming blade 10 from rotating due to the rough shape or surface is avoided.

In some embodiments, as shown in fig. 1 and 2, the reamer blade 10 is provided with a notch for preventing one end of the reamer blade 10 from being rotated out and the other end thereof from being higher than the tool body 2.

Through the above structure, after the reamer blade 10 rotates out, the notch is flush with the inner wall of the placement chamber 23, so that the other end of the reamer blade 10 does not extend out of the placement chamber 23.

In some embodiments, as shown in fig. 1 and 2, the tool body 2 is provided with a plurality of drainage holes 22, and the diameter of the drainage holes 22 is larger than that of the mounting screw 6.

With the above configuration, the drainage hole 22 can drain the fluid in the tool body 2, thereby discharging the fluid in the tool body 2, preventing accumulation of the fluid in the tool body 2, and the mounting screw 6 can be mounted through the drainage hole 22.

In summary, when reaming is needed, firstly, a drill rod special for an oil well is connected with an upper joint 1, so that the drill rod drives the upper joint 1 to move, after a tool main body 2 moves to a position where reaming is needed, pressure is applied to an overflow mandrel 3 in the tool main body 2, the overflow mandrel 3 pushes a piston 5 to move towards a reaming blade 10, and as a result, the piston 5 is fixedly connected with a push block 8 through a mounting screw 6, the push block 8 moves towards the reaming blade 10, then an arc-shaped part of the push block 8 pushes the reaming blade 10 to rotate, so that the reaming blade 10 rotates out of the tool main body 2 through a rectangular hole 24, reaming is carried out on a well, and when fluid passes through a first channel 101, a second channel 21 and a third channel 31, the fluid can flow into a drainage hole 22 through a diversion hole 51 on the piston 5, so that the fluid is discharged; when the reaming operation is completed, the pressure on the overcurrent mandrel 3 is reduced, so that the return spring 7 rebounds, the return spring 7 pushes the piston 5 to move towards the upper joint 1, and the push block 8 is far away from the reaming blade 10, and the reaming blade 10 rotates and returns accordingly. Retraction of the reamer blade 10 is completed.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (8)

1. A reamer for petroleum drilling, which is characterized by comprising an upper joint (1), a tool main body (2), a driving structure and a reamer blade (10);

a first channel (101) penetrates through the upper joint (1), one end of the first channel (101) is connected with an external tool and used for driving the upper joint (1) to move in a well, the other end of the first channel (101) is connected with the tool main body (2), the driving structure is arranged in the tool main body (2), the reaming blade (10) is arranged in the tool main body (2), and the driving structure is abutted to the reaming blade (10);

The driving structure comprises an overcurrent core shaft (3), a positioning disc (4), a piston (5), a reset spring (7) and a push block (8), wherein the overcurrent core shaft (3) is arranged inside the tool main body (2), the positioning disc (4) is sleeved on the overcurrent core shaft (3) and is in threaded connection with the inside of the tool main body (2), the overcurrent core shaft (3) is far away from one end of the upper joint (1) and is connected with the piston (5), the reset spring (7) is sleeved on the piston (5), the piston (5) is connected with the push block (8), and the push block (8) is in butt joint with the reamer blade (10).

2. The reamer for petroleum drilling according to claim 1, wherein the second channel (21) is penetrated inside the tool main body (2), the upper joint (1) is connected with the inner wall of the second channel (21), the first channel (101) is communicated with the second channel (21), the flow-through mandrel (3) is arranged in the second channel (21), the third channel (31) is penetrated inside the flow-through mandrel (3), the third channel (31) is communicated with the second channel (21), the positioning disc (4) is connected with the inner wall of the second channel (21), the piston (5) is internally provided with a flow guide hole (51), one end of the flow guide hole (51) is communicated with the third channel (31), the other end of the flow guide hole (51) is communicated with the second channel (21), and the piston (5) is abutted against the inner wall of the second channel (21).

3. The reamer for petroleum drilling according to claim 2, wherein the piston (5) comprises a connecting portion (52) and a pushing portion (53), the diversion hole (51) is formed in the connecting portion (52), the connecting portion (52) is connected with the overflowing mandrel (3), the connecting portion (52) is abutted against the inner wall of the second channel (21), the diameter of the pushing portion (53) is smaller than that of the connecting portion (52), a rectangular opening (54) is formed in the surface of the pushing portion (53), the pushing block (8) is arranged in the rectangular opening (54), the pushing block (8) is flush with the surface of the pushing portion (53), and a mounting screw (6) is arranged between the pushing block (8) and the pushing portion (53) in the axial direction perpendicular to the tool main body (2).

4. A reamer for petroleum drilling according to claim 3, characterized in that the tool body (2) is provided with an annular protrusion (25), the annular protrusion (25) is abutted against the pushing block (8), the annular protrusion (25) is abutted against the pushing portion (53), a space between the annular protrusion (25) and the connecting portion (52) is a spring groove (12), a return spring (7) is provided in the spring groove (12), the return spring (7) is sleeved on the pushing portion (53), one end of the return spring (7) is abutted against the connecting portion (52), and the other end of the return spring (7) is abutted against the annular protrusion (25).

5. The reamer for petroleum drilling according to claim 4, wherein a placement bin (23) is formed in the tool main body (2), the placement bin (23) is communicated with the second channel (21), the reaming blade (10) is arranged in the placement bin (23), a pin shaft (9) is fixedly connected to the reaming blade (10), the pin shaft (9) is rotatably connected with the placement bin (23), a clamp spring (11) is arranged between the pin shaft (9) and the placement bin (23), and a rectangular hole (24) is formed in the outer surface of the tool main body (2) for the reaming blade (10) to rotate out.

6. A reamer for petroleum drilling according to claim 5, wherein the portion of the push block (8) located between the annular projection (25) and the reamer blade (10) is at the same height as the placement bin (23), and the portion of the push block (8) abutting against the reamer blade (10) is arc-shaped.

7. A reamer for petroleum drilling according to claim 1, wherein the reamer blade (10) is notched for preventing one end of the reamer blade (10) from being rotated out while the other end is higher than the tool body (2).

8. A reamer for petroleum drilling according to claim 3, wherein the tool body (2) is provided with a plurality of drainage holes (22), the diameter of the drainage holes (22) being greater than the diameter of the mounting screw (6).