CN215108841U

CN215108841U - Protective cup type packer

Info

Publication number: CN215108841U
Application number: CN202121230788.7U
Authority: CN
Inventors: 杨福军; 纪鹏; 吴国宏; 单希为
Original assignee: FUXIN PETROLEUM TOOLS FACTORY
Current assignee: FUXIN PETROLEUM TOOLS FACTORY
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2021-12-10
Anticipated expiration: 2031-06-03

Abstract

A protective cup type packer belongs to the field of downhole tools of oil and gas fields, and the utility model meets the requirement that a cup cannot be scraped during the downhole process, and avoids the situation that the packer cannot be set during operation; the fluke of the hydraulic anchor cannot be clamped by sand after fracturing, so that the risk of encountering resistance when the pipe string is lifted is reduced; when the pipe string is lifted, the anchor fluke can be reliably recovered when residual pressure exists in the well, and the packer is reliably unlocked and unsealed. The utility model discloses an anchor body, packing element axle, lower clutch, a serial communication port, be provided with the fluke hole on the anchor body, the anchor fluke is equipped with in the fluke hole, be provided with the spring nest on the fluke, the built-in spring that is equipped with of spring nest the anchor body with detachably has installed the clamp plate on the fluke hole, the bush is equipped with in the anchor body hole, the one end of anchor body with the one end of packing element axle is connected, the epaxial packing element that is provided with of packing element and lower clamping ring, the one end of clamping ring is connected with main piston down, the lower part of main piston is provided with the leather cup.

Description

Protective cup type packer

Technical Field

The utility model belongs to oil gas field downhole tool field specifically relates to a protection packing cup type packer.

Background

When a conventional Y531 packer is used for fracturing, acidizing and other operations in an oil field, as the conventional Y531 packer is lowered into a well with a cup bell mouth facing downwards, a cup of the packer is easy to scratch in the process of lowering the well, the packer cannot be set in operation, and a hydraulic anchor fluke is easy to be clamped by sand after the conventional Y531 packer is fractured, so that the hydraulic anchor fluke is blocked when a pipe string is pulled; when the pipe string is lifted, the anchor fluke is not easy to recover when residual pressure exists in the well, and the packer is not easy to be unlocked and deblocked.

The existing tools have problems: firstly, because the Y531 packer adopts a leather cup bell mouth to be downwards put into a well, the leather cup of the conventional Y531 packer is easy to be scraped in the well-descending process, so that the packer can not be set during operation; secondly, the hydraulic anchor fluke is easily clamped by sand after fracturing, so that the hydraulic anchor fluke is blocked when a pipe column is lifted; and thirdly, when residual pressure exists in the well when the pipe string is lifted, the anchor fluke is not easy to recover, and the packer is not easy to be unlocked and deblocked.

Disclosure of Invention

Aiming at the problems, the utility model makes up the defects of the prior art and provides a protective cup type packer; the utility model meets the requirement that the leather cup can not be scraped during the process of going into the well, and avoids the situation that the packer can not be set during operation; the fluke of the hydraulic anchor cannot be clamped by sand after fracturing, so that the risk of encountering resistance when the pipe string is lifted is reduced; when the pipe string is lifted, the anchor fluke can be reliably recovered when residual pressure exists in the well, and the packer is reliably unlocked and unsealed.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

The utility model provides a protective leather cup type packer, which comprises an anchor body, a rubber sleeve shaft and a lower joint, and is characterized in that a fluke hole is arranged on the anchor body, a fluke is arranged in the fluke hole, a spring pit is arranged on the fluke, a spring is arranged in the spring pit, a pressing plate is detachably arranged on the anchor body and the fluke hole, a lining is arranged in the anchor body inner hole, one end of the anchor body is connected with one end of the rubber sleeve shaft, the rubber sleeve shaft is provided with a rubber sleeve and a lower pressing ring, one end of the lower pressing ring is connected with a main piston, the lower part of the main piston is provided with a leather cup, the rubber sleeve shaft is also provided with a spring seat and a retaining sleeve, the spring seat is provided with a locking spring, the lower end inner hole of the retaining sleeve is provided with an auxiliary piston, the inner wall of the auxiliary piston is provided with an annular groove, the retaining ring is arranged in the annular groove, and the retaining sleeve is also provided with a protective sleeve, the stop collar with all be equipped with the fixture block groove on the protective sheath, the fixture block inslot is provided with the fixture block, the horn mouth part of leather cup sets up in the upper end hole of protective sheath, the inner wall of protective sheath still is provided with the annular, be provided with the rand in the annular, the one end of rubber barrel axle with the lower clutch is connected.

Furthermore, the outer wall of the anchor body and the anchor claw hole are simultaneously provided with a pressing plate groove, and the pressing plate is arranged in the pressing plate groove.

Furthermore, a tapered hole is formed in the pressing plate, a threaded hole is formed in the anchor body, a screw is installed in the threaded hole in a matched mode, the pressing plate is fixed through the screw, and the spring and the fluke are limited in the fluke hole through the pressing plate.

Furthermore, the bush is limited by a shoulder structure of the inner hole of the anchor body and the upper end surface of the rubber sleeve shaft.

Furthermore, the rubber cylinder and the lower pressing ring are limited by a shoulder structure on the upper part of the rubber cylinder shaft and the lower end surface of the anchor body.

Furthermore, the lower pressing ring is detachably connected with the main piston through an inner thread structure and an outer thread structure, and a locking thread is arranged at a corresponding connecting position on the main piston.

Furthermore, an annular groove is formed in the lock spring seat, the lock spring is arranged in the annular groove, and the lock spring seat is limited by a shoulder structure on the upper portion of the rubber cylinder shaft.

Furthermore, a first threaded hole is formed in the lock spring seat, a first shearing pin is arranged in the first threaded hole in a matched mode, and the lock spring seat is connected with the rubber barrel shaft through the first shearing pin.

Furthermore, the stop sleeve is limited by a shoulder structure at the lower part of the rubber cylinder shaft and the upper end surface of the lower joint.

Furthermore, a second threaded hole is formed in the protective sleeve, a second shearing pin is arranged in the second threaded hole in a matched mode, and the auxiliary piston is limited by the second shearing pin and the lower end face of the blocking sleeve.

The beneficial effects of the utility model.

The utility model can prevent the leather cup from being scraped during the process of going into the well, and avoid the situation that the packer can not be set during operation; the fluke of the hydraulic anchor cannot be clamped by sand after fracturing, so that the risk of encountering resistance when the pipe string is lifted is reduced; when the pipe string is lifted, the anchor fluke can be reliably recovered when residual pressure exists in the well, and the packer is reliably unlocked and unsealed.

Drawings

In order to make the technical problem, technical scheme and beneficial effect that the utility model solved more clearly understand, it is right to combine the attached drawing and detailed description mode below the utility model discloses further detailed description. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.

Fig. 1 is a half sectional view of the whole structure of the present invention.

Fig. 2 is a partially enlarged schematic view of a portion a of fig. 1 of the present invention.

Fig. 3 is a partially enlarged schematic view of the position B in fig. 1 of the present invention.

Fig. 4 is a partially enlarged schematic view of the point C in fig. 1 of the present invention.

The labels in the figure are: the device comprises an anchor body 1, a rubber barrel shaft 2, a lower joint 3, an anchor claw 4, a spring 5, a pressing plate 6, a lining 7, a rubber barrel 8, a lower pressing ring 9, a main piston 10, a leather cup 11, a spring seat 12, a retaining sleeve 13, a locking spring 14, an auxiliary piston 15, a retaining ring 16, a protective sleeve 17, a clamping block 18, a clamping ring 19, a clamping ring 20, a pressing plate groove 21, a conical hole 22, a screw 23, a first threaded hole 24, a first shearing pin 25, a second threaded hole 26 and a second shearing pin 26.

Detailed Description

The anchor body 1 is provided with an anchor jaw hole, an anchor jaw 4 is arranged in the anchor jaw hole, a spring pit is arranged on the anchor jaw 4, a spring 5 is arranged in the spring pit, a pressing plate 6 is detachably arranged on the anchor body 1 and the anchor jaw hole, the outer wall of the anchor body 1 and the anchor jaw hole are simultaneously provided with a pressing plate groove 20, and the pressing plate 6 is arranged in the pressing plate groove 20. Be provided with bell mouth 21 on the clamp plate 6, be provided with the screw hole on the anchor body 1, the screw 22 is installed to the cooperation screw hole, and the clamp plate 6 is fixed to screw 22, and clamp plate 6 is downthehole with spring 5 and fluke 4 spacing fluke. One end of the anchor body 1 is connected with one end of the rubber cylinder shaft 2, and one end of the rubber cylinder shaft 2 is connected with the lower joint 3.

The rubber sleeve shaft 2 is provided with a rubber sleeve 8 and a lower pressing ring 9, and the rubber sleeve 8 and the lower pressing ring 9 are simultaneously limited by a shoulder structure on the upper part of the rubber sleeve shaft 2 and the lower end surface of the anchor body 1. One end of the lower pressing ring 9 is connected with a main piston 10, the lower pressing ring 9 and the main piston 10 are detachably connected through an internal and external thread structure, a lock spring seat 12 is arranged on the rubber cylinder shaft 2, a lock spring 14 is arranged on the lock spring seat 12, an annular groove is formed in the lock spring seat 12, the lock spring 14 is arranged in the annular groove, and the lock spring seat 12 is limited by a shoulder structure on the upper portion of the rubber cylinder shaft 2. Be equipped with first screw hole 23 on the lock spring seat 12, first screw hole 23 cooperation is equipped with first shear pin 24, and lock spring seat 12 is connected through first shear pin 24 with packing element axle 2. The advantages that the anchor fluke 4 can be reliably recovered when residual pressure exists in the well when the pipe string is lifted, and the packer is reliably unlocked and unsealed are realized.

A lining 7 is arranged in an inner hole of the anchor body 1, the lining 7 is limited by a shoulder structure of the inner hole of the anchor body 1 and the upper end surface of the rubber sleeve shaft 2, the requirement that the fluke 4 of the hydraulic anchor after fracturing cannot be clamped by sand is met, and the risk of encountering resistance during lifting of a pipe column is reduced.

The corresponding connection position on the main piston 10 is provided with a locking thread. The lower part of the main piston 10 is provided with a leather cup 11, the rubber cylinder shaft 2 is provided with a retaining sleeve 13, and the retaining sleeve 13 is limited by a shoulder structure at the lower part of the rubber cylinder shaft 2 and the upper end surface of the lower connector 3. The lower extreme hole of spacer sleeve 13 is provided with vice piston 15, the inner wall of vice piston 15 is provided with the annular, install in the annular and keep off ring 16, still be provided with protective sheath 17 on the spacer sleeve 13, all be equipped with the fixture block groove on spacer sleeve 13 and the protective sheath 17, the fixture block inslot is provided with fixture block 18, the bell mouth part of leather cup 11 sets up in the upper end hole of protective sheath 17, the inner wall of protective sheath 17 still is provided with the annular, be provided with rand 19 in the annular, be equipped with second screw hole 25 on the protective sheath 17, second screw hole 25 cooperation is equipped with second shear pin 26, vice piston 15 is spacing by the lower terminal surface of second shear pin 26 and spacer sleeve 13. The packer cup 11 can not be scraped in the process of going into the well, and the packer cannot be set in the process of avoiding operation.

The working principle is as follows.

Setting: go into the design position with this protection packing cup type packer down, the tubular column lower extreme needs to connect the constant pressure ball seat, the pumping in the oil pipe, fluke 4 expenditure anchoring is on the sleeve pipe, vice piston 15 cuts second shear pin 26, under hydraulic effect, vice piston 15 drives protective sheath 17 down, the horn mouth of packing cup 11 is opened, lean on the elastic recovery original state, contact with the intraductal wall of casing, continue to pump and open the constant pressure ball seat, hydraulic pressure is returned by the oil jacket annular space, be used in on packing cup 11, hydraulic pressure promotes packing cup 11 and drives main piston 10, push down ring 9 compression packing element 8 and sit and seal.

Deblocking: the method comprises the steps that firstly, pressure in the well is balanced, when the pipe string is allowed to move, if no residual pressure exists in the well at the time, the pressure of an inner cavity and an outer cavity of a tool is balanced, an anchor claw 4 rebounds under the action of a spring 5 and retracts into an anchor claw hole, the tool loses anchoring, the pipe string is lifted up at the time, after a rubber sleeve 8 is blocked, resistance is transmitted to a lower pressing ring 9, a main piston 10, a lock spring 14 and a lock spring seat 12 and finally transmitted to a first shearing pin 24, the first shearing pin 24 is sheared, the rubber sleeve 8 rebounds, the lower pressing ring 9, the main piston 10, the lock spring 14 and the lock spring seat 12 move downwards, and the packer is unsealed; and secondly, when the pressure in the well is balanced and the pipe string is allowed to move, if residual pressure exists in the well at the moment, the anchor jaw 4 is paid out, the packer cannot be unlocked, the annular pressure of an oil sleeve can be achieved, the anchor jaw 4 is forcibly pressed back by the pressure, the tool loses anchoring and continues to be pressed, the thrust generated by the pressure sequentially acts on the rubber sleeve 8, the lower pressing ring 9, the main piston 10, the locking spring 14, the locking spring seat 12 and the first shearing pin 24 and continues to be pressed to a sudden pressure drop, the first shearing pin 24 is sheared, the rubber sleeve 8 rebounds, the lower pressing ring 9, the main piston 10, the locking spring 14 and the locking spring seat 12 move downwards, the packer is unlocked, and the pipe string is lifted up to lift the packer out.

It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.

Claims

1. The utility model provides a protection leather cup type packer, includes anchor body (1), packing element axle (2), lower clutch (3), its characterized in that, be provided with the fluke hole on anchor body (1), fluke (4) have been installed in the fluke hole, be provided with the spring nest on fluke (4), the built-in spring (5) that is equipped with of spring nest anchor body (1) with clamp plate (6) have been installed to detachably on the fluke hole, bushing (7) have been installed in anchor body (1) hole, the one end of anchor body (1) with the one end of packing element axle (2) is connected, be provided with packing element (8) and lower compression ring (9) on packing element axle (2), the one end of lower compression ring (9) is connected with main piston (10), the lower part of main piston (10) is provided with leather cup (11), still be provided with spring seat (12) and keep off cover (13) on packing element axle (2), lock spring seat (12) facial make-up is equipped with lock spring (14), the lower extreme hole of spacer sleeve (13) is provided with vice piston (15), the inner wall of vice piston (15) is provided with the annular, install in the annular and keep off ring (16), still be provided with protective sheath (17) on spacer sleeve (13), spacer sleeve (13) with all be equipped with the fixture block groove on protective sheath (17), the fixture block inslot is provided with fixture block (18), the horn mouth part of leather cup (11) sets up in the upper end hole of protective sheath (17), the inner wall of protective sheath (17) still is provided with the annular, be provided with rand (19) in the annular, the one end of rubber barrel axle (2) with lower clutch (3) are connected.

2. A packer of the protective cup type according to claim 1, characterised in that the anchor body (1) is provided with a pressure plate groove on both its outer wall and the anchor eye, the pressure plate (6) being arranged in the pressure plate groove.

3. A packer of the protection cup type according to claim 1, characterised in that the pressure plate (6) is provided with a conical hole (21), the anchor body (1) is provided with a threaded hole, a screw (22) is mounted in cooperation with the threaded hole, the screw (22) fixes the pressure plate (6), and the pressure plate (6) limits the spring (5) and the fluke (4) in the fluke hole.

4. A packer of the protective cup type according to claim 1, characterised in that the bushing (7) is retained by a shoulder formation of the inner bore of the anchor body (1) and the upper end surface of the rubber barrel shaft (2).

5. A packer of the protective cup type according to claim 1, characterised in that the packing element (8) and the lower pressure ring (9) are simultaneously retained by the shoulder structure of the upper part of the packing element shaft (2) and the lower end surface of the anchor body (1).

6. A protection cup type packer according to claim 1, wherein the lower pressure ring (9) is detachably connected with the main piston (10) through an internal and external thread structure, and a locking thread is arranged at a corresponding connection position on the main piston (10).

7. A packer of the protective cup type according to claim 1, characterised in that the spring block (12) is provided with a ring groove in which the spring (14) is arranged, the spring block (12) being retained by a shoulder structure on the upper part of the rubber-coated shaft (2).

8. A packer of a protection cup type according to claim 1, wherein the lock spring seat (12) is provided with a first threaded hole (23), the first threaded hole (23) is provided with a first shear pin (24) in a matching manner, and the lock spring seat (12) is connected with the rubber barrel shaft (2) through the first shear pin (24).

9. A packer of the protective cup type according to claim 1, characterised in that the spacer (13) is limited by a shoulder structure in the lower part of the rubber cylinder shaft (2) and by the upper end surface of the lower sub (3).

10. A packer of the cup type according to claim 1, characterised in that the protective casing (17) is provided with a second threaded hole (25), the second threaded hole (25) is provided with a second shear pin (26) in a matching manner, and the secondary piston (15) is retained by the second shear pin (26) and the lower end surface of the collar (13).