CN218882193U

CN218882193U - Large-drift-diameter hydraulic releasing packer and special seat sealing bearing mechanism

Info

Publication number: CN218882193U
Application number: CN202223303754.3U
Authority: CN
Inventors: 杨军; 梅明霞; 王冰; 衣春霞; 许霞; 武明鸣; 金亮宇
Original assignee: China Petroleum and Chemical Corp; Sinopec Research Institute of Petroleum Engineering Shengli Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Research Institute of Petroleum Engineering Shengli Co
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-04-18
Anticipated expiration: 2032-12-07

Abstract

The utility model discloses a large-drift-diameter hydraulic releasing packer and a special seat sealing bearing mechanism, which comprises an inner central tube, an outer central tube, a seat sealing driving mechanism and a seat sealing mechanism; the outer central tube is positioned outside the inner central tube, and the upper ends of the inner central tube and the seat sealing mechanism are both connected with a seat sealing driving mechanism; the lower end of the seat seal driving mechanism presses the upper end of the seat seal mechanism, and the lower end of the seat seal driving mechanism is connected with the upper end of the seat seal mechanism through a protection pin; the lower ends of the inner central tube and the seat sealing mechanism are both connected with a seat sealing force bearing mechanism. After the hydraulic setting tool of the packer is set, the setting mechanism and the releasing tool are lifted out together, and the maximum drift diameter of a reserved well can reach 127mm; and the seat sealing mechanism adopts a locking block bearing protection mechanism, the sealing pressure difference is high, the anchoring force is strong, and a special fishing mechanism is arranged, so that the fishing is convenient in the later period, and the requirements of a later-period downward plug removal or test tool can be completely met.

Description

Large-drift-diameter hydraulic release packer and special seat sealing bearing mechanism

Technical Field

The utility model belongs to the technical field of the oil downhole tool technique and specifically relates to a big latus rectum hydraulic pressure release packer and special seat seal load mechanism.

Background

In the production operation process of the oil well, the packer plays a role in packing an oil layer. After the packer is sealed, the operation procedures of well washing, blockage removal, sand washing, layered sand prevention, layered steam injection, testing and the like need to be carried out in the well-left packer, and the drift diameter in the well-left of the packer needs to be increased as much as possible. At present, for a 7-in casing pipe, the conventional packer is used, the maximum inner drift diameter can only reach 100mm after releasing, and if a blockage removal or test tool needs to be put in at the later stage, due to the fact that the inner diameter of a reserved well is small, the putting tool usually causes construction operation accidents such as pipe column blocking, blocking when the putting tool is put in, and the like.

In the prior art, CN203847056U discloses a large drift diameter packer, which comprises a central tube, a core tube sleeved outside the central tube, an upper joint fixedly arranged at the upper end of the central tube, and a lower joint sleeved at the lower end of the core tube, wherein an actuating mechanism, a sealing mechanism and an anchoring mechanism are further arranged between the upper joint and the lower joint, the large drift diameter packer further comprises an unsealing mechanism, the unsealing mechanism comprises an unsealing claw spring and an unsealing sliding sleeve, the lower part of the unsealing claw spring and the unsealing sliding sleeve are detachably connected through an unsealing pin, the lower part of the unsealing claw spring can also abut against the lower joint, and a protrusion for abutting against the upper end of the unsealing sliding sleeve is formed on the inner wall of the unsealing claw spring. The anchoring mechanism of the packer adopts one-way anchoring, the anchoring force is weaker, and the inner drift diameter is relatively smaller.

CN205805498U discloses a large-drift-diameter hydraulic packer, which comprises a hydraulic anchoring mechanism, a setting mechanism, a rubber sleeve sealing mechanism and an unsealing mechanism. The device includes two-layer axial structure of center pin and locking mandrel, can make the packer obtain great latus rectum, improves the production efficiency of oil gas well. The special pressure transmission channel transmits the setting pressure to the upper end of the setting piston through 4 lateral holes and pressure transmission holes which are uniformly distributed on the central shaft, the pressure transmission channel is large and short, the blockage is not easy, and the reliable setting of the packer is ensured. The packer has no releasing function, and the packer does not leave a well.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects existing in the prior art, the purpose of the utility model is to provide a large-drift-diameter hydraulic releasing packer and a special seat sealing force-bearing mechanism, after the hydraulic seat sealing tool of the packer seals the tool seat, the seat sealing mechanism and the releasing tool are lifted out together, and the maximum drift diameter of the reserved well can reach 127mm; and the seat sealing mechanism adopts a locking block bearing protection mechanism, the sealing pressure difference is high, the anchoring force is strong, and a special fishing mechanism is arranged, so that the fishing is convenient in the later period, and the requirements of a later-period downward plug removal or test tool can be completely met.

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

a large-drift-diameter hydraulic releasing packer comprises an inner central pipe, an outer central pipe, a seat sealing driving mechanism and a seat sealing mechanism; the outer central tube is positioned outside the inner central tube, and the upper ends of the inner central tube and the seat sealing mechanism are both connected with a seat sealing driving mechanism;

the lower end of the seat seal driving mechanism presses the upper end of the seat seal mechanism, and the lower end of the seat seal driving mechanism is connected with the upper end of the seat seal mechanism through a protection pin;

the lower ends of the inner central tube and the seat sealing mechanism are both connected with a seat sealing force bearing mechanism.

The seat seal driving mechanism comprises an upper joint, a piston and a pressure transmission inner pipe;

the upper end of the pressure transmission inner pipe is connected with the upper joint, the piston is arranged in a piston cavity formed between the pressure transmission inner pipe and the upper joint, and the pressure transmission inner pipe is provided with a pressure transmission hole capable of transmitting pressure to the upper part of the piston;

the lower end of the pressure transmission inner pipe is connected with the inner central pipe, the lower end of the piston presses the upper end of a seat seal transmission sleeve of the seat seal mechanism, and the lower end of the piston is connected with the upper end of the seat seal transmission sleeve through a protection pin;

the piston is connected with the pressure transmission inner pipe through a piston seat seal shearing pin.

The seat sealing mechanism comprises a locking ring, a rubber cylinder upper pressing sleeve, a rubber cylinder, a slip upper cone, a slip and a slip lower cone which are sequentially sleeved on the outer wall of the outer central pipe from top to bottom;

the upper end of the upper pressure sleeve of the rubber cylinder is also connected with the lower end of the seat seal transmission sleeve, the lower end of the slips lower cone is connected with a connecting pipe, and the lower end of the connecting pipe is connected with a lower joint of the outer pipe.

The seat seal force bearing mechanism comprises an inner central pipe lower joint, a seat seal pin sleeve, a ball seat and a pin block;

the upper end of the ball seat is connected with the lower end of the inner central tube, the seat seal pin sleeve is hung outside the ball seat, the seat seal pin sleeve is provided with a through hole through which a pin block can pass, and the outer end of the pin block is inserted into the inner wall of the lower joint of the outer tube and is provided with a pin block bearing blind hole;

the lower end of the seat seal pin sleeve is connected with a lower joint of the inner central pipe, and the ball seat is connected with the lower joint of the inner central pipe through a seat seal shear pin.

And the inner wall of the lower joint of the inner central pipe is provided with a limiting step for preventing the ball seat from continuously descending.

Still including salvaging deblocking mechanism, it sets up at the setting mechanism bottom inboard to salvage deblocking mechanism.

The fishing deblocking mechanism comprises a fishing sliding sleeve;

the lower end of the outer central pipe is provided with a protruding clamping claw, the fishing sliding sleeve is positioned at the lower end of the outer central pipe, the fishing sliding sleeve is fixed on a lower connector of the outer pipe of the seat sealing mechanism through a fishing shearing pin, and the inner side of the fishing sliding sleeve supports the protruding clamping claw, so that the clamping claw of the outer central pipe is fixed in a clamping groove of the inner wall of the connecting pipe.

The upper end of the outer central tube is connected with a seat seal transfer sleeve of the seat seal mechanism through a rubber sleeve seat seal shearing pin.

The outer wall of the inner central pipe is also provided with a righting sleeve.

a seat sealing force bearing mechanism special for a large-drift-diameter hydraulic releasing packer comprises an inner central pipe lower joint, a seat sealing pin bush, a ball seat and a pin block;

Compared with the prior art, the utility model following beneficial effect has:

1. the hydraulic setting mechanism does not leave a well, and the piston does not leave the well, so that the packer obtains an inner diameter of 127mm, and a larger channel is provided for the treatment of a later-stage oil well.

2. The locking block is used as a force bearing protection mechanism, the sealing pressure difference is high, the anchoring force is strong, and midway setting can not occur due to irregular well track.

Drawings

Fig. 1 is the utility model relates to a large latus rectum hydraulic pressure releasing packer's schematic structure diagram.

Reference numbers in the figures: 1. an upper joint; 2. a piston; 3. a pressure transmission inner pipe; 4. the piston seat seals the shearing pin; 5. protecting the pin; 6. a seat seal transmission sleeve; 7. a centralizing sleeve; 8. sealing the shearing pin by the rubber cylinder seat; 9. a locking ring; 10. pressing a sleeve on the rubber cylinder; 11. an outer center tube; 12. a rubber cylinder; 13. an inner center tube; 14. slips; 15. a slip lower cone; 16. a connecting pipe; 17. salvaging the sliding sleeve; 18. fishing the shearing pin; 19. an outer tube lower joint; 20. a seat seal pin sleeve; 21. a ball seat; 22. a pin block; 23. a lower joint of the inner central tube; 24. and (4) sealing the shear pin.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1:

as shown in fig. 1, the utility model provides a pair of big latus rectum hydraulic pressure packer of giving up, pass and press inner tube 3 to arrange in top connection 1 inside, 1 lower part of top connection is arranged in to piston 2, pass and press the outside of inner tube 3, pass and press 3 upper portions of inner tube and top connection 1's internal thread connection, pass and press inner tube 3 and piston 2 to seal shear pin 4 fixedly through the piston seat, interior center tube 13 upper portion and pass and press inner tube 3 threaded connection in order, the lower part outside and the seat of interior center tube 13 pin bushing 20 threaded connection, the ball seat 21 is connected in order to the lower part inboard of interior center tube 13, it is inboard that the ball seat 21 is fixed including center tube lower clutch 23 through seat shear pin 24. And a centering sleeve 7 is arranged on the outer side of the inner central tube 13 and is in threaded connection with the inner central tube 13. The outer side of the piston 2 is sequentially connected with a setting transmission sleeve 6, a rubber cylinder upper pressing sleeve 10, a rubber cylinder 12, a slip lower cone, a slip 14, a slip lower cone 15, a connecting pipe 16 and an outer pipe lower joint 19. The seat seal pin sleeve 20 is arranged on the outer sides of the inner central tube 13 and the ball seat 21, and four through holes are uniformly distributed on a boss of the seat seal pin sleeve 20 in the radial direction. The inner side of the outer tube lower joint 19 is provided with a pin slot, and a pin block 22 is matched with the pin slot.

The seat seal rubber sleeve 6 is connected with a rubber sleeve upper pressing sleeve 10 through threads, a locking ring 9 is located in a wedge-shaped space between the seat seal transmission sleeve 6 and the rubber sleeve upper pressing sleeve 10, the locking ring 9 is provided with a check ring, the outer central pipe 11 is provided with a check ring, and after moving downwards, the locking ring 9 and the outer central pipe 11 form locking, so that a slip 14 and a rubber sleeve 12 are kept in an expansion state. The rubber sleeve seat seal shearing pin 8 plays a role in fixing the seat seal transmission sleeve 6 and the rubber sleeve upper pressing sleeve 10 before seat seal, and the rubber sleeve seat seal shearing pin 8 is sheared after the seat seal is pressed. After the tool seat is sealed, an inner tool is lifted, the protection pin 5 is cut off, the lower end of the outer central tube 11 is provided with a protruding binding claw, the fishing sliding sleeve 17 is positioned at the lower end of the outer central tube 11 and is fixed on the lower joint 19 of the outer tube through the fishing shearing pin 18, the inner side of the fishing sliding sleeve 17 supports the protruding binding claw, the outer central tube 11 is fixed in a clamping groove in the inner wall of the connecting tube 16, the fishing sliding sleeve 17 is fixed on the lower joint 19 of the outer tube through the fishing shearing pin 18, after fishing is carried out by the fishing tool, the fishing shearing pin 18 is cut off, the fishing sliding sleeve 17 moves upwards, the lower end of the outer central tube 11 is provided with the protruding binding claw which loses the support, the outer central tube 11 can move upwards, the connecting tube 16 and the outer central tube 11 can carry out relative displacement, and the tool can be unsealed. The inner base pipe lower joint 23 can be connected with a lower inner pipe, and the outer pipe lower joint 19 is connected with an outer sand screen pipe or an oil pipe.

The using method comprises the following steps:

packer anchoring and setting: after the tool is lowered to the designed depth, a ball is thrown from a well mouth, liquid is pumped in and sent out, the ball falls on the conical surface of the ball seat 21 to form a closed space, the liquid enters the end surface of the piston 2 from two holes in the pressure transmission inner pipe 3, when the rated working pressure of the tool is reached, the piston seat seal shearing pin 4 shears the pushing piston 2, the piston 2 pushes the seat seal transfer sleeve 6, the seat seal transfer sleeve 6 pushes the rubber sleeve upper pressing sleeve 10, the rubber sleeve seat seal shearing pin 8 plays a role in fixing the seat seal transfer sleeve 6 and the rubber sleeve upper pressing sleeve 10 before seat seal, the rubber sleeve seat seal shearing pin 8 shears after seat seal pressing, the rubber sleeve upper pressing sleeve 10 pushes the rubber sleeve 12, the rubber sleeve 12 pushes the slip upper cone, the slip 14 is ejected by an inclined plane, the slip 14 and the rubber sleeve 12 act on the casing at the same time, the locking ring 9 has a horse ring buckle, the outer central pipe 11 has a horse ring buckle, and the locking ring 9 forms locking with the outer central pipe 11 after downward movement, so that the slip 14 and the rubber sleeve 12 keep an expansion state, and anchoring and seat seal are realized. The rubber cylinder, the slips, the upper cone body, the lower cone body and other mechanisms are all known in the field and can be directly applied.

Releasing: after the slips 14 and the rubber cylinder 12 are completely set, the pressing is continued, when the setting pressure reaches the rated working pressure, the setting shear pin 24 is cut off, the steel ball is on the ball seat 21 to push the ball seat 21 to move downwards, after the ball seat 21 reaches the bottommost end, the upper space of the ball seat 21 is exposed, the pin block 22 falls into the annular space of the ball seat 21 and the inner central tube lower joint 19, the pin block 22 is released, the inner tube and the outer tube can be separated after losing the relative fixed pin block 22 and the outer tube, the upper joint 1, the piston 2, the pressure transmission inner tube 3, the centering sleeve 7, the inner central tube 13, the setting pin sleeve 20, the ball seat 21, the pin block 22 and the inner central tube lower joint 23 are lifted, the inner tool is lifted, the protection pin 5 is cut off, and the releasing is realized.

The fishing sliding sleeve 17 is located that the lower end of the outer central pipe 11 has the inner side of a protruding clamping jaw to support the protruding clamping jaw, so that the outer central pipe 11 is fixed in the clamping groove of the connecting pipe 16, the fishing sliding sleeve 17 is fixed on the lower joint 19 of the outer pipe through the fishing shearing pin 18, after fishing is carried out by a fishing tool, the fishing shearing pin 18 is cut off, the fishing sliding sleeve 17 moves upwards, the lower end of the outer central pipe 11 has the inner side of the protruding clamping jaw to lose support, the outer central pipe 11 can move upwards, the connecting pipe 16 and the outer central pipe 11 can move relatively, and the tool can be unsealed.

Deblocking: the fishing sliding sleeve 17 is located the outer center tube 11 lower extreme and has outstanding beam claw inboard to support outstanding beam claw, make outer center tube 11 be fixed in the connecting pipe 16 draw-in groove, the fishing sliding sleeve 17 is fixed on outer tube lower clutch 19 through salvaging shear pin 18, go into special deblocking instrument to fishing sliding sleeve 17 down, lift the tubular column, salvage shear pin 18 and cut, salvage sliding sleeve 17 and move up, outer center tube 11 lower extreme has outstanding beam claw inboard to lose the support, outer center tube 11 just can the upward movement, connecting pipe 16 and outer center tube 11 can carry out relative displacement, slips 14 retract, packing element 12 recovers, the packer deblocking.

Example 2:

as shown in fig. 1, the special seat seal bearing mechanism provided by the utility model comprises an inner central tube lower joint, a seat seal pin bush, a ball seat and a pin block;

All parts and components which are not discussed in the present application and the connection mode of all parts and components in the present application belong to the known technology in the technical field. The application is direct and will not be described in detail.

In the present application, the term "plurality" is intended to mean two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and simplification of description, rather than indicating or implying that the indicated device or unit must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A large-drift-diameter hydraulic releasing packer comprises an inner central pipe, an outer central pipe, a seat sealing driving mechanism and a seat sealing mechanism; the outer central tube is positioned outside the inner central tube, and the upper ends of the inner central tube and the seat sealing mechanism are both connected with a seat sealing driving mechanism;

the device is characterized in that the lower end of the seat seal driving mechanism presses the upper end of the seat seal mechanism, and the lower end of the seat seal driving mechanism is connected with the upper end of the seat seal mechanism through a protection pin;

2. The large-drift-diameter hydraulic releasing packer as claimed in claim 1, wherein the seat sealing driving mechanism comprises an upper joint, a piston and a pressure transmission inner pipe;

3. The large-drift-diameter hydraulic releasing packer as claimed in claim 2, wherein the setting mechanism comprises a locking ring, a rubber cylinder upper pressing sleeve, a rubber cylinder, a slip upper cone, a slip and a slip lower cone which are sequentially sleeved on the outer wall of the outer central pipe from top to bottom;

the upper end of the rubber cylinder upper pressing sleeve is further connected with the lower end of the seat seal transmission sleeve, the lower end of the slip lower cone body is connected with a connecting pipe, and the lower end of the connecting pipe is connected with the lower joint of the outer pipe.

4. The large-drift-diameter hydraulic releasing packer as claimed in claim 3, wherein the seat seal bearing mechanism comprises an inner central pipe lower joint, a seat seal pin sleeve, a ball seat and a pin block;

5. The large-drift-diameter hydraulic releasing packer as claimed in claim 4, wherein a limiting step for preventing the ball seat from continuously descending is formed on the inner wall of the lower joint of the inner central pipe.

6. The large-drift-diameter hydraulic releasing packer according to any one of claims 1 to 5, further comprising a fishing and unsealing mechanism, wherein the fishing and unsealing mechanism is arranged on the inner side of the bottom of the setting mechanism.

7. The large-drift-diameter hydraulic releasing packer according to claim 6, wherein the fishing deblocking mechanism comprises a fishing sliding sleeve;

8. The large-drift-diameter hydraulic releasing packer as claimed in claim 7, wherein the upper end of the outer central tube is further connected with a setting transmission sleeve of a setting mechanism through a rubber sleeve setting shear pin.

9. The large-drift-diameter hydraulic releasing packer as claimed in claim 7, wherein the outer wall of the inner central pipe is further provided with a centering sleeve.

10. A seat seal bearing mechanism special for a large-drift-diameter hydraulic release packer is characterized by comprising an inner central pipe lower joint, a seat seal pin sleeve, a ball seat and a pin block;

the upper end of the ball seat is connected with the lower end of the inner central tube, the seat seal pin sleeve is hung outside the ball seat in a sleeved mode, the seat seal pin sleeve is provided with a through hole through which the pin block can pass, and the outer end head of the pin block is inserted into the inner wall of the lower joint of the outer tube and is provided with a pin block force bearing blind hole;

11. The special seat sealing and bearing mechanism for the large-drift-diameter hydraulic release packer as claimed in claim 10, wherein a limiting step for preventing the ball seat from going down continuously is formed on the inner wall of the lower joint of the inner central pipe.