CN111852384A

CN111852384A - Packer for oil field downhole

Info

Publication number: CN111852384A
Application number: CN202010702147.0A
Authority: CN
Inventors: 肖云东
Original assignee: 肖云东
Current assignee: Daqing Dannuo Petroleum Technology Development Co.,Ltd.
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2020-10-30
Anticipated expiration: 2040-07-21
Also published as: CN111852384B

Abstract

The invention discloses an oil field based downhole packer, which relates to the technical field of packers, and particularly relates to an oil field based downhole packer, which comprises a left connector, wherein a central pipe is movably sleeved inside the left connector, an adjusting ring is sleeved on the right end of the left connector in a threaded manner, a clamping block is fixedly connected to the bottom of the adjusting ring, a movable groove is formed inside the central pipe, the clamping block is clamped inside the movable groove, a reset spring is arranged inside the movable groove, and a rubber pipe is arranged on the right side of the clamping block. Through the mode connection left connector and the adjustable ring that adopt threaded connection, rotatory left connector makes the adjustable ring move to the right, then makes support piece inflation seal the pipeline through the compression of adjustable ring to support piece, and the mode of rotatory propulsion is simpler, prevents that the adjustable ring from moving back and leading to sealed failure, has guaranteed sealed stability.

Description

Packer for oil field downhole

Technical Field

The invention relates to the technical field of packers, in particular to a packer for underground use based on an oil field.

Background

The packer is widely applied to operations such as well drilling, well cementing, testing, well completion and the like. The packer is also used for underground petroleum operation, the packer is used for layering in the oil production process, an oil production channel is designed on the packer, and when setting, the piston sleeve moves upwards, and the oil production channel is opened; after the setting, the upper layer pressure acts on the balance piston to push the rubber cylinder upwards, so that the deblocking pin is prevented from shearing force; when the oil extraction channel is unsealed, the unsealing pin is cut off by the friction force between the rubber sleeve and the sleeve, and the piston sleeve moves downwards to close the oil extraction channel.

Packer carries out the in-process sealed to the pipeline, need extrude the rubber tube, thereby make the outside inflation of diameter of rubber tube seal the pipeline, but the rubber tube can take place to warp after long-time extrusion, lead to the rubber tube can't recover original shape, the rubber tube can remain the expanded state all the time, cause the unable smooth deblocking that carries on of packer, current packer adopts hydraulic mode to seal moreover, seal structure is complicated, the sealed condition of inefficacy appears easily, for this we provide one kind based on the oil field is downhole with the packer.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an oil field downhole packer, which solves the problems in the background technology.

In order to achieve the purpose, the invention is realized by the following technical scheme: a packer used in the well based on an oil field comprises a left connector, a central pipe is movably sleeved in the left connector, the right end of the left connector is in threaded sleeve connection with an adjusting ring, the bottom of the adjusting ring is fixedly connected with a clamping block, a movable groove is arranged in the central tube, the clamping block is clamped in the movable groove, a return spring is arranged in the movable groove, the right side of the clamping block is provided with a rubber tube which is movably sleeved outside the central tube, a supporting piece is arranged inside the rubber tube, the right side of the rubber tube is provided with a cone cap, the inside of the cone cap is provided with an anti-loosening pin, the right side of the cone cap is clamped with a cone block, the right side of cone block is provided with the sheath, the right side of sheath is provided with the clutch blocks, the right side of clutch blocks is provided with right connector, right connector cup joints the right-hand member at the center tube.

Optionally, inside fixedly connected with snap ring, the snap ring joint is in the outside of left side connector, the outside of left side connector is provided with the screw thread, the screw thread is in the same place with the inboard threaded connection of adjustable ring.

Optionally, the return spring is movably sleeved inside the movable groove, and the left end of the return spring is fixedly connected with the right side of the fixture block.

Optionally, the number of the rubber tubes is three, the three rubber tubes are sequentially arranged rightwards, a spacing ring is arranged between every two rubber tubes, and the spacing ring is movably sleeved outside the central tube.

Optionally, a fixing block is arranged inside the rubber tube, and the supporting pieces are fixedly connected to two sides of the fixing block and are symmetrical about the fixing block.

Optionally, the support piece is including the sleeve pipe, sleeve pipe fixed connection is in the left side of fixed block, sheathed tube inside is provided with compression spring, the loop bar has been cup jointed in the activity of sheathed tube left side, the left side of loop bar articulates there is the pull rod, the top of pull rod articulates there is the backup pad, the top of backup pad is in the same place with the top fixed connection of rubber tube inner chamber.

Optionally, the number of the supporting pieces is six and is symmetrically distributed about the center of the rubber pipe.

Optionally, the sheath is movably sleeved outside the central tube, a slip is hinged to the left side of the sheath, sawtooth patterns are arranged at the bottom of the slip, the slip is matched with the cone block, and a supporting spring is arranged between the sheath and the cone block.

Optionally, a small spring is arranged inside the friction block, a friction plate is fixedly connected to the bottom of the small spring, and the top of the small spring extends to the outside of the friction block.

The invention provides an oil field downhole packer, which has the following beneficial effects:

1. this based on oil field is packer for pit, connect left connector and adjustable ring through the mode that adopts threaded connection, rotatory left connector makes the adjustable ring move rightwards, then makes the support piece inflation seal the pipeline through the compression of adjustable ring to support piece, and the mode of rotatory propulsion is simpler, prevents that the adjustable ring from moving back and leading to sealed failure, has guaranteed sealed stability.

2. This based on oil field is downhole uses packer, through setting up reset spring, when carrying out the deblocking, reset spring can give the adjustable ring thrust left, help adjustable ring removes left, reduce the required power of adjustable ring deblocking, conveniently carry out the deblocking, through setting up support piece in the inside of rubber tube, in-process compression spring at the deblocking can promote the loop bar to remove left, stimulate the pull rod left by the loop bar again, make the pull rod stimulate the backup pad downwards, utilize the backup pad to withdraw the rubber tube to original state, avoid the rubber tube to cause unable the recovering owing to long-time extrusion deformation, and lead to the deblocking failure.

3. This based on oil field is in pit with packer through setting up the slips, when sealing up, the cone block moves right under the effect of rubber tube, makes the gradual outwards opening of slips, utilizes the outside sawtooth line of slips to fix the inner wall of pipeline, plays the effect of supporting the packer, can lock the rubber tube simultaneously, avoids the rubber tube inefficacy, and supporting spring can give the thrust left of cone block when the deblocking, makes things convenient for the cone block to withdraw from the inside of slips.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of the hose of the present invention;

FIG. 3 is a cross-sectional view of the left side of the hose of the present invention;

fig. 4 is a schematic structural diagram of the left connector of the present invention.

In the figure: 1. a left connector; 2. a snap ring; 3. a thread; 4. a central tube; 5. an adjusting ring; 6. a clamping block; 7. a movable groove; 8. a return spring; 9. a hose; 91. a fixed block; 10. a support member; 101. a sleeve; 102. a compression spring; 103. a loop bar; 104. a pull rod; 105. a support plate; 11. a spacer ring; 12. a cone cap; 13. a locking pin; 14. a cone block; 15. a sheath; 16. slips; 17. a support spring; 18. a friction block; 19. a small spring; 20. a friction plate; 21. the right connector.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 to 4, the present invention provides a technical solution: a packer used in the underground based on an oil field comprises a left connector 1, wherein a snap ring 2 is fixedly connected inside the left connector 1, the snap ring 2 is clamped outside the left connector 1, threads 3 are arranged outside the left connector 1, the threads 3 are in threaded connection with the inner side of an adjusting ring 5, a central pipe 4 is movably sleeved inside the left connector 1, the adjusting ring 5 is sleeved on the right end threads of the left connector 1, the left connector 1 and the adjusting ring 5 are connected in a threaded connection mode, the adjusting ring 5 is moved rightwards by rotating the left connector 1, then the supporting piece 10 is expanded to seal a pipeline by compressing the supporting piece 10 through the adjusting ring 5, the rotating and pushing mode is simpler, the sealing failure caused by the backward movement of the adjusting ring 5 is prevented, the sealing stability is ensured, a clamping block 6 is fixedly connected at the bottom of the adjusting ring 5, a movable groove 7 is formed inside, the clamping block 6 is clamped inside the movable groove 7, the reset spring 8 is arranged inside the movable groove 7, the reset spring 8 is movably sleeved inside the movable groove 7, the left end of the reset spring 8 is fixedly connected with the right side of the clamping block 6, when the deblocking is carried out, the reset spring 8 can give a leftward thrust to the adjusting ring 5 to help the adjusting ring 5 to move leftward and reduce the force required by the deblocking of the adjusting ring 5, the deblocking is convenient to carry out, the right side of the clamping block 6 is provided with the rubber tube 9, the rubber tube 9 is movably sleeved outside the central tube 4, the rubber tube 9 is internally provided with the supporting piece 10, the rubber tube 9 is internally provided with the fixed blocks 91, the supporting piece 10 is fixedly connected to two sides of the fixed blocks 91 and is symmetrical relative to the fixed blocks 91, the supporting piece 10 comprises a sleeve 101, the sleeve 101 is fixedly connected to the left side of the fixed blocks 91, a sleeve rod 103 is movably sleeved on the left side of the sleeve 101, a pull rod 104 is hinged on the left side of the sleeve rod 103, a support plate 105 is hinged on the top of the pull rod 104, the top of the support plate 105 is fixedly connected with the top of an inner cavity of the rubber tube 9, a support piece 10 is arranged in the rubber tube 9, the sleeve rod 103 can be pushed leftwards to move by a compression spring 102 in the unsealing process, the pull rod 104 is pulled leftwards by the sleeve rod 103, the support plate 105 is pulled downwards by the pull rod 104, the rubber tube 9 is retracted to the original state by the support plate 105, the unsealing failure caused by the incapability of recovering of the rubber tube 9 due to long-time extrusion deformation is avoided, three rubber tubes 9 are sequentially arranged rightwards, the number of the support pieces 10 is six, the support pieces are symmetrically distributed about the center of the rubber tube 9, a spacer ring 11 is arranged between every two rubber tubes 9, the spacer, the method is characterized in that the spacing rings 11 are used for separating adjacent rubber tubes 9, the phenomenon that the rubber tubes 9 cannot be expanded outwards accurately due to the fact that the rubber tubes 9 are soft in texture in the process of extruding the rubber tubes 9, the rubber tubes 9 are enabled to deviate in certain expansion direction, sealing is not tight enough is avoided, a cone cap 12 is arranged on the right side of each rubber tube 9, a check pin 13 is arranged inside each cone cap 12, a cone block 14 is clamped on the right side of each cone cap 12, a sheath 15 is arranged on the right side of each cone block 14, the sheath 15 is movably sleeved outside a central tube 4, slips 16 are hinged on the left side of each sheath 15, sawtooth patterns are arranged at the bottoms of the slips 16, the slips 16 are matched with the cone blocks 14, the cone blocks 14 move rightwards under the effect of the rubber tubes 9 when sealing is conducted through the slips 16, the slips 16 are enabled to expand outwards gradually, the inner walls of pipelines are fixed, the packer supporting function is achieved, the rubber tube 9 can be locked, failure of the rubber tube 9 is avoided, the supporting spring 17 can provide leftward thrust for the cone block 14 during unpacking, the cone block 14 can conveniently withdraw from the inside of the slip 16, the supporting spring 17 is arranged between the sheath 15 and the cone block 14, the friction block 18 is arranged on the right side of the sheath 15, the small spring 19 is arranged inside the friction block 18, the bottom of the small spring 19 is fixedly connected with the friction plate 20, the top of the small spring 19 extends to the outside of the friction block 18, by arranging the friction block 18 and utilizing the friction plate 20 to support the small spring 19 outwards, the small spring 19 and the pipeline are rubbed, the small spring 19 is kept still under the action of friction force of the inner wall of the pipeline, the adjusting ring 5, the rubber tube 9, the cone block 14 and the like can move upwards conveniently for deblocking, the right connector 21 is arranged on the right side of the friction block 18, and the right connector 21 is sleeved at the right end of the central pipe 4.

In conclusion, when the packer for the oil field downhole is used, the packer is placed at a position needing sealing, the left connector 1 is rotated to push the adjusting ring 5 to move rightwards, the adjusting ring 5 pushes the rubber tube 9 to move rightwards, the conical block 14 extrudes the slips 16, the pipeline is fixed by the sawtooth patterns outside the slips 16, the sleeve rod 103 retracts into the sleeve 101 in the process of extruding the rubber tube 9, the pull rod 104 upwards supports the support plate 105, and the rubber tube 9 is expanded and enlarged to seal the pipeline.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a based on oil field is packer for pit, includes left connector (1), its characterized in that: the inner part of the left connector (1) is movably sleeved with a center tube (4), the right end of the left connector (1) is screwed with an adjusting ring (5), the bottom of the adjusting ring (5) is fixedly connected with a clamping block (6), an active groove (7) is formed in the center tube (4), the clamping block (6) is clamped in the active groove (7), a reset spring (8) is arranged in the active groove (7), a rubber tube (9) is arranged on the right side of the clamping block (6), the rubber tube (9) is movably sleeved outside the center tube (4), a support (10) is arranged in the rubber tube (9), a cone cap (12) is arranged on the right side of the rubber tube (9), an anti-loosening pin (13) is arranged in the cone cap (12), and a cone block (14) is clamped on the right side of the cone cap (12), the right side of cone block (14) is provided with sheath (15), the right side of sheath (15) is provided with clutch blocks (18), the right side of clutch blocks (18) is provided with right connector (21), right connector (21) cup joints the right-hand member at center tube (4).

2. The packer for the oil field downhole according to claim 1, wherein: inside fixedly connected with snap ring (2), snap ring (2) joint is in the outside of left side connector (1), the outside of left side connector (1) is provided with screw thread (3), screw thread (3) are in the same place with adjustable ring (5) inboard threaded connection.

3. The packer for the oil field downhole according to claim 1, wherein: the reset spring (8) is movably sleeved inside the movable groove (7), and the left end of the reset spring (8) is fixedly connected with the right side of the clamping block (6).

4. The packer for the oil field downhole according to claim 1, wherein: the number of the rubber tubes (9) is three, the three rubber tubes are sequentially arranged rightwards, every two rubber tubes (9) are provided with a spacing ring (11), and the spacing ring (11) is movably sleeved outside the central tube (4).

5. The packer for the oil field downhole according to claim 1, wherein: the rubber tube (9) is internally provided with a fixing block (91), and the supporting pieces (10) are fixedly connected to two sides of the fixing block (91) and are symmetrical relative to the fixing block (91).

6. The packer for the oil field downhole according to claim 5, wherein: support piece (10) are including sleeve pipe (101), sleeve pipe (101) fixed connection is in the left side of fixed block (91), the inside of sleeve pipe (101) is provided with compression spring (102), loop bar (103) have been cup jointed in the left side activity of sleeve pipe (101), the left side of loop bar (103) articulates there is pull rod (104), the top of pull rod (104) articulates there is backup pad (105), the top of backup pad (105) is in the same place with the top fixed connection of rubber tube (9) inner chamber.

7. The packer for the oil field downhole according to claim 1, wherein: the number of the supporting pieces (10) is six and the supporting pieces are symmetrically distributed about the center of the rubber pipe (9).

8. The packer for the oil field downhole according to claim 1, wherein: the protective sleeve is characterized in that the protective sleeve (15) is movably sleeved outside the central pipe (4), a slip (16) is hinged to the left side of the protective sleeve (15), sawtooth patterns are arranged at the bottom of the slip (16), the slip (16) is matched with the cone block (14), and a supporting spring (17) is arranged between the protective sleeve (15) and the cone block (14).

9. The packer for the oil field downhole according to claim 1, wherein: the friction block (18) is internally provided with a small spring (19), the bottom of the small spring (19) is fixedly connected with a friction plate (20), and the top of the small spring (19) extends to the outside of the friction block (18).