CN218439320U

CN218439320U - Bidirectional well killing sliding sleeve device

Info

Publication number: CN218439320U
Application number: CN202221767152.0U
Authority: CN
Inventors: 刘练; 罗荣; 邹伟; 李晓胜; 张丽英; 付豪
Original assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co
Priority date: 2022-07-11
Filing date: 2022-07-11
Publication date: 2023-02-03
Anticipated expiration: 2032-07-11

Abstract

The utility model provides a bidirectional kill sliding sleeve device, which comprises a body, wherein the body comprises a first joint and a second joint, and the first joint is provided with a first through hole; the connecting assembly comprises an inner sleeve connected with the first joint and a connecting sleeve connected with the second joint, wherein a second through hole is formed in the inner sleeve; the ball seat is fixedly connected with the inner sleeve through a pin, a third through hole is formed in the ball seat, and a ball body which can be thrown into the ball seat and is abutted to the upstream end of the ball seat can be cut off under the action of pressure, so that the ball seat is enabled to move downstream to the bottom of the second joint, and therefore fluid can flow to the outside through the first through hole and the second through hole or the third through hole. The utility model discloses can realize two-way kill-job, further satisfy the operation requirement of high temperature high pressure oil gas well.

Description

Bidirectional well killing sliding sleeve device

Technical Field

The utility model relates to an oil gas field well drilling field specifically relates to a two-way kill sliding sleeve device.

Background

Currently, kill slips are commonly used in oil fields. The kill sleeve is typically connected to the annulus between the tubing and the casing by moving the inner sleeve to establish a kill circulation path. In addition, the kill sliding sleeve is provided with sealing washer and sealed packing on the sleeve still including to improve sealing reliability. However, the rated parameters of the well killing sliding sleeve can only meet the use requirements of the normal-pressure oil and gas well.

With the development of ultra-deep oil and gas fields, the temperature at the bottom of the well and the pressure of the formation are gradually increased. Generally, after the well is subjected to circulating killing, a pocket below the sliding sleeve needs to be subjected to positive killing, so that the performance parameters of the conventional killing sliding sleeve are difficult to meet the use requirements of a high-temperature high-pressure oil-gas well.

However, there is no device that can solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two-way kill-job sliding sleeve device, it can form two-way kill-job passageway after the ball seat whereabouts to can carry fluid faster in the kill-job operation, further satisfy the operation requirement of high temperature high pressure oil gas well.

According to the present invention, there is provided a bi-directional kill slip sleeve device, comprising a longitudinally extending body including a first joint disposed at an upstream end for receiving a fluid, and a second joint disposed at a downstream end, wherein at least one first through-hole is radially provided in the first joint; the connecting assembly is arranged in the body and comprises an inner sleeve connected with the first joint and a connecting sleeve connected with the second joint, wherein at least one second through hole is formed in the inner sleeve along the radial direction; a ball seat disposed in the connecting assembly and fixedly connected to the inner sleeve by a pin, wherein at least one third through hole is radially formed in the ball seat, and a ball capable of being inserted into the body and abutting against an upstream end of the ball seat, wherein the ball is configured to shear the pin under pressure to cause the ball seat to move downstream to a bottom of the second joint, whereby fluid can flow to the outside through the first through hole and the second through hole or the third through hole.

In one embodiment, the ball seat is configured as a hollow sleeve and forms a chamber with the second nipple, the chamber communicating with the interior of the nipple to allow the fluid to flow downstream.

In one embodiment, a first step extending radially inwardly and obliquely is formed in the second joint to limit an axial movement stroke of the ball seat.

In one embodiment, a curved surface is formed at the junction of the ball seat and the ball.

In one embodiment, the inner sleeve is configured as a hollow sleeve and includes a first inner sleeve section fixedly coupled to the first tab and a second inner sleeve section extending radially outward from the first inner sleeve section.

In one embodiment, the connecting sleeve is configured as a hollow sleeve and comprises a first connecting sleeve portion and a second connecting sleeve portion, wherein the outer diameter of the first connecting sleeve portion is smaller than the outer diameter of the second connecting sleeve portion, wherein the second connecting sleeve portion is connected with the second joint, and wherein the first connecting sleeve portion axially abuts the second inner sleeve portion.

In one embodiment, the first coupling sleeve portion has a radially inwardly extending inclined second step for engagement with the ball seat.

In one embodiment, a spacer ring is arranged between the connecting sleeve and the second joint.

In one embodiment, seal packing is filled between the ball seat and the first and second joints.

In one embodiment, a seal is provided between the ball seat and the first and second joints, the seal being configured as a rubber ring.

Drawings

The invention will be described in detail below with reference to the attached drawings, in which:

fig. 1 schematically shows the structure of a bidirectional kill sliding sleeve apparatus according to the present invention;

fig. 2 is a schematic structural view of a first stage of the bi-directional kill slip device according to the present invention;

fig. 3 is a schematic structural diagram of a second stage of the bidirectional kill sliding sleeve device according to the present invention.

In the drawings, like parts are given like reference numerals. The figures are not drawn to scale.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings. For ease of understanding, the directional terms "longitudinal" or "axial" or the like refer to the length of the bi-directional kill sleeve device, i.e., the vertical direction in FIG. 1. The directional terms "transverse" or "radial" or the like refer to a direction perpendicular to the "longitudinal" or "axial" direction, i.e., the horizontal direction in FIG. 1. The directional terms "upstream" or "above" or the like refer to a direction near the wellhead, i.e., the top direction in FIG. 1. The directional terms "downstream" or "below" or the like refer to a direction away from the wellhead, i.e., the bottom end direction in FIG. 1.

Fig. 1 schematically shows the structure of a bi-directional kill-slip kit 100 according to the present invention. As shown in fig. 1, the bidirectional kill sliding sleeve device 100 according to the present invention mainly includes a body 10. The body 10 includes a first joint 11, a second joint 12, and a connection assembly 20. Wherein the first connector 11 is configured as a hollow sleeve and is at the upstream end of the body 10 for receiving fluid from upstream. The second adapter 12 is configured as a hollow sleeve and is at the downstream end of the body 10. The connecting assembly 20 is disposed in the middle of the body 10 and is fixedly connected to the first joint 11 and the second joint 12, respectively. According to an embodiment of the present invention, at least one first through hole 111 is radially provided on the first joint 11. The first through-hole 111 can provide a flow path for fluid in subsequent operations.

According to the utility model discloses, coupling assembling 20 includes endotheca 21 and adapter sleeve 22. As shown in fig. 1, the inner sleeve 21 is fixedly connected with the first joint 11; one end of the connecting sleeve 22 is fixedly connected with the first joint 11, and the other end of the connecting sleeve 22 is fixedly connected with the second joint 12. Thus, the first joint 11, the inner sleeve 21, the connecting sleeve 22 and the second joint 12 are constructed into an interconnected combination, thereby improving the stability of the bi-directional kill sleeve apparatus 100 in operation in the well. According to an embodiment of the present invention, at least one second through hole 211 is radially formed on the inner sleeve 21. The second through hole 211 communicates with the first through hole 111, and the second through hole 211 and the first through hole 111 can provide a flow passage for the fluid together in the subsequent operation.

According to the present invention, the bi-directional kill sleeve device 100 further includes a ball seat 30. As shown in fig. 1, the ball seat 30 is constructed in a hollow sleeve structure and is installed in the combination body as described above. In addition, the ball seat 30 is fixedly connected with the inner sleeve 21 through the pin 31, so that the first through hole 111 and the second through hole 211 are blocked. According to an embodiment of the present invention, at least one third through hole 32 is radially formed on the ball seat 30. The third through-hole 32 can provide a flow path for fluid in subsequent operations.

According to the present invention, the bi-directional kill sleeve device 100 further includes a ball 40. Fig. 2 is a schematic diagram of a first stage of a bi-directional kill shoe apparatus 100 according to the present invention. As shown in fig. 2, the ball 40 is configured to be thrown into the combination as described above, and the ball 40 can abut against the upstream end of the ball seat 30. Additionally, the ball 40 is configured to shear the pin 31 under pressure, thereby causing the ball seat 30 to move downstream in the assembly until the ball seat 30 moves to the bottom end of the second sub 12. The fluid in this case can flow to the outside through the first through holes 111 and the second through holes 211, and can flow to the outside through the third through holes 32. It is easy to understand that compared with the conventional kill sleeve, the present invention has two channels for guiding the fluid to flow to the outside. Thus, the bidirectional kill sliding sleeve device 100 can convey fluid faster, thereby meeting the use requirements of high-temperature and high-pressure oil and gas wells.

In one embodiment of the present invention, the ball 40 is preferably a stainless steel ball. Thus, when the ball 40 is thrown into the combination, the ball 40 can move downstream under its own weight. In this manner, the bi-directional kill sleeve device 100 is able to more quickly enter into service.

Fig. 3 is a schematic diagram of a second stage of the bi-directional kill shoe apparatus 100 according to the present invention. As shown in fig. 3, according to an embodiment of the present invention, a chamber 33 is formed between the ball seat 30 and the second joint 12, and the chamber 33 can communicate with the inner cavity of the connection sleeve 22 for guiding the fluid. Specifically, when the ball seat 30 moves to the bottom end of the second coupling 12, the fluid can flow to the outside through the first coupling 11, the inner sleeve 21, the connection sleeve 22, the chamber 33, and the third through hole 32 in sequence. Thus, the bidirectional kill-slip sleeve device 100 has two channels for guiding the fluid to flow to the outside, thereby realizing the function of bidirectional kill, and further meeting the use requirements of high-temperature and high-pressure oil and gas wells.

According to the present invention, as shown in fig. 1, a first step 121 is formed in the second joint 12. The first step 121 is extended inward in a radial direction and can limit a moving stroke of the ball seat 30. Specifically, as the ball seat 30 is pushed by the ball 40 shearing the pin 31, it continues to move downstream until the bottom of the ball seat 30 comes into abutment with the first step 121. In this manner, the ball seat 30 is restricted from moving in an axial direction, thereby helping to provide a downstream flow path for subsequent fluids.

According to an embodiment of the present invention, a curved surface is formed at the junction of the ball seat 30 and the ball 40. In this way, the top end of the ball seat 30 provides more room for the ball 40 to fall into. Thus, when the ball 40 is put into the assembly, the ball 40 moves downstream by its own weight, so that the ball 40 can more easily fall into the ball seat 30, and further, the effect of abutting against the upstream end of the ball seat 30 is achieved.

According to one embodiment of the present invention, as shown in fig. 1, the inner sleeve 21 is configured as a hollow sleeve and includes a first inner sleeve portion 212 and a second inner sleeve portion 213. Wherein the first inner housing part 212 is fixedly connected with the first joint 11 by screws. The second inner housing section 213 extends radially outwardly from the first inner housing section 212 to form an effective snap fit with the first connector 11 to further define the positional relationship between the first connector 11 and the inner housing 21. In this way, the bidirectional kill sliding sleeve device 100 can have more stable and reliable effects in the kill operation process. In one embodiment of the present invention, the screw is preferably a hexagon socket flat set screw.

According to one embodiment of the invention, as shown in fig. 1, the connection sleeve 22 is configured as a hollow sleeve and comprises a first connection sleeve part 221 and a second connection sleeve part 222. Wherein, the first connecting sleeve part 221 and the first joint 11 are fixedly connected through screws; the second connecting sleeve part 222 is fixedly connected with the second joint 12 by means of screws. In this way, the bidirectional kill sliding sleeve device 100 can have more stable and reliable effects in the kill operation process. Further, the first connecting sleeve portion 221 abuts the second inner sleeve portion 213 in the axial direction. Thus, the inner sleeve 21 and the connecting sleeve 22 can play a certain role in buffering in the process of shearing the pin 31. In one embodiment of the present invention, the screw is preferably a hexagon socket flat set screw.

According to an embodiment of the invention, the outer diameter of the first connecting sleeve portion 221 is smaller than the outer diameter of the second connecting sleeve portion 222. Thus, the connecting sleeve 22 can be effectively clamped with the first connector 11, and the position relationship between the first connector 11 and the connecting sleeve 22 is further defined. In this way, the bidirectional kill sliding sleeve device 100 can have more stable and reliable effects in the kill operation process.

According to an embodiment of the present invention, as shown in fig. 1, a second step 223 is provided on the first connecting sleeve portion 221. The second step 223 is arranged to extend radially inwardly with an inclination for engagement with the ball seat 30. This makes it possible, on the one hand, to fasten the connection sleeve 22 to the first joint 11 more firmly. On the other hand, since the second step 223 is attached to the ball seat 30, the second step 223 can play a certain role in radially restricting the ball seat 30.

According to an embodiment of the invention, a spacer ring (not shown) is provided between the connection sleeve 22 and the second joint 12. When the ball 40 shears the pin 31 under pressure, a certain compressive force is created between the connection sleeve 22 and the second connector 12. Thus, the spacer ring can play a certain role in buffering.

According to one embodiment of the present invention, as shown in fig. 1, sealing packing 50 is filled between the ball seat 30 and the first and

second joints

11 and 12. In this way, the sealing performance of the bi-directional kill sleeve device 100 is effectively improved. In one embodiment of the present invention, the seal packing 50 is preferably a V-shaped seal packing.

According to an embodiment of the present invention, as shown in fig. 1, a sealing member 60 is provided between the ball seat 30 and the first and

second joints

11 and 12. In this way, the sealing performance of the bi-directional kill sliding sleeve device 100 is effectively improved. In one embodiment of the present invention, the sealing member 60 is a rubber ring made of PEEK rubber.

The utility model provides a two-way kill-job sliding sleeve device, it can form two-way kill-job passageway after ball seat 30 whereabouts to can carry fluid faster in the kill-job operation, further satisfy the operation requirement of high temperature high pressure oil gas well. In addition, compare in the killing sliding sleeve commonly used (rated parameter is for nai high temperature 105 ℃ and withstand voltage difference 70 MPa), the utility model discloses (rated parameter is for nai high temperature 204 ℃ and withstand voltage difference 105MPa at least) has stronger high temperature resistant and highly compressed ability.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or variations within the scope of the present disclosure, and such changes or variations are intended to be covered by the scope of the present disclosure. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A bi-directional kill slip sleeve device, comprising:

a body (10) extending in a longitudinal direction, the body (10) comprising a first joint (11) arranged at an upstream end for receiving a fluid, and a second joint (12) arranged at a downstream end, wherein at least one first through hole (111) is provided in the radial direction on the first joint (11);

a connecting assembly (20) arranged in the body (10), wherein the connecting assembly (20) comprises an inner sleeve (21) connected with the first joint (11) and a connecting sleeve (22) connected with the second joint (12), and at least one second through hole (211) is formed in the inner sleeve (21) in the radial direction;

a ball seat (30) arranged in the connecting assembly (20), wherein the ball seat (30) is fixedly connected with the inner sleeve (21) through a pin (31), at least one third through hole (32) is arranged on the ball seat (30) along the radial direction,

a ball (40) which can be put into the body (10) and which abuts against the upstream end of the ball seat (30),

wherein the ball (40) is configured to shear the pin (31) under pressure, thereby causing the ball seat (30) to move downstream to the bottom of the second joint (12), whereby fluid can flow to the outside through the first through hole (111) and the second through hole (211) or the third through hole (32).

2. A bi-directional kill sleeve assembly as set forth in claim 1 wherein said ball seat (30) is configured as a hollow sleeve and a chamber (33) is formed with said second sub (12), said chamber (33) communicating with the interior of said nipple (22) to permit downstream flow of said fluid.

3. A bi-directional kill sleeve assembly as set forth in claim 2 wherein a first step (121) extending radially inwardly at an incline is formed in the second sub (12) for limiting the axial travel of the ball seat (30).

4. A bi-directional kill sleeve device as set forth in claim 3 wherein a cambered surface is formed at the junction of said ball seat (30) and said ball body (40).

5. The bi-directional kill sleeve device of claim 4, wherein said inner sleeve (21) is configured as a hollow sleeve and includes a first inner sleeve portion (212) fixedly connected to said first sub (11), and a second inner sleeve portion (213) extending radially outward from said first inner sleeve portion (212).

6. A bi-directional kill sleeve device according to claim 5, wherein the connection sleeve (22) is configured as a hollow sleeve and comprises a first connection sleeve portion (221) and a second connection sleeve portion (222), wherein the outer diameter of the first connection sleeve portion (221) is smaller than the outer diameter of the second connection sleeve portion (222), the second connection sleeve portion (222) is connected to the second joint (12), and the first connection sleeve portion (221) axially abuts the second inner sleeve portion (213).

7. A bi-directional kill sleeve device as set forth in claim 6 wherein said first coupling sleeve portion (221) has a radially inwardly extending second step (223) for engagement with said ball seat (30).

8. A bi-directional kill sleeve device according to any of claims 1-7, characterized in that a spacer ring is provided between the connection sleeve (22) and the second joint (12).

9. The bi-directional kill sleeve device of any of claims 1-7, wherein a seal packing (50) is filled between the ball seat (30) and the first (11) and second (12) joints.

10. The bi-directional kill sleeve device of any of claims 1-7, wherein a seal (60) is provided between the ball seat (30) and the first (11) and second (12) subs, the seal (60) being configured as a rubber annulus.