Sliding sleeve

Patent metadata

Field	Value
Publication number	US-11885201-B2
Application number	US-201716071111-A
Country	US
Kind code	B2
Filing date	Jan 13, 2017
Priority date	Jan 20, 2016
Publication date	Jan 30, 2024
Grant date	Jan 30, 2024

Abstract

A new sliding sleeve relates to the technical field of oil and gas well completion and reservoir stimulation, comprising an upper connector, a lower connector, an outer housing, an inner sleeve and a shear pin. The upper connector and the lower connector are respectively connected to two ends of the outer housing, and the inner sleeve is locked in the outer housing via the shear pin, wherein a flow guiding hole is provided in the outer housing, and the inner sleeve can open or close the flow guiding hole, wherein at least two grooves for engaging with at least two corresponding tooth-shaped elements on a sliding sleeve opening tool are disposed along an axial direction in the inner sleeve, and wherein an erosion-resistant ring is embedded in the groove, and an inner diameter of the erosion-resistant ring is larger than or equal to an inner diameter of the inner sleeve.

First claim

The invention claimed is:

1. A new sliding sleeve, comprising an upper connector, a lower connector, an outer housing, an inner sleeve and a shear pin,
wherein the upper connector and the lower connector are respectively connected to two ends of the outer housing, and the inner sleeve is locked in the outer housing via the shear pin;
wherein a flow guiding hole is provided in the outer housing, and the inner sleeve can open or close the flow guiding hole; and
wherein at least one groove for engaging with at least one corresponding tooth-shaped element on a sliding sleeve opening tool is disposed along an axial direction in the inner sleeve, and an erosion-resistant ring is embedded in the groove, with an inner diameter of the erosion- resistant ring being larger than or equal to an inner diameter of the inner sleeve.

2. The new sliding sleeve according to claim 1 , wherein the inner sleeve comprises a first inner sleeve and a second inner sleeve, and the first inner sleeve and the second inner sleeve are connected to each other by welding, a thread, or a thread plus welding.

3. The new sliding sleeve according to claim 1 , wherein the new sliding sleeve further comprises a sealing rubber barrel and a retaining ring, and a chamfer for fitting the sealing rubber barrel is disposed in the inner sleeve, wherein the sealing rubber barrel is embedded into the chamfer, and a position of the sealing rubber barrel is limited by the retaining ring disposed under the sealing rubber barrel.

4. The new sliding sleeve according to claim 3 , wherein a movable element is disposed among a lower end of the inner sleeve, the outer housing and the retaining ring; a positioning ring is disposed at a downside position of the retaining ring; and an annular space is formed by the outer housing, the movable element, the retaining ring and the positioning ring.

5. The new sliding sleeve according to claim 4 , wherein the lower end of the inner sleeve and the movable element are connected to each other via a thread, and the retaining ring and the positioning ring are connected to each other via a thread.

6. The new sliding sleeve according to claim 4 , wherein the movable element is an elastic piece structure which compresses the retaining ring circumferentially, and the retaining ring and the positioning ring are connected to each other via a thread.

7. The new sliding sleeve according to claim 3 , wherein a movable element is disposed among a lower end of the inner sleeve, the outer housing and the retaining ring, wherein the movable element is a clamp ring and is used to enable the inner sleeve and the retaining ring to be fixed relative to each other, and an annular space is formed by the outer housing, the inner sleeve and the retaining ring.

8. The new sliding sleeve according to claim 4 , wherein a sealing ring is disposed between the positioning ring and the outer housing.

9. The new sliding sleeve according to claim 8 , wherein at least one pressure relief hole is disposed in the retaining ring, and the pressure relief hole is in communication with the annular space.

10. The new sliding sleeve according to claim 3 , wherein at least one surface of the sealing rubber barrel is uneven, so that a gap exists between the sealing rubber barrel and the chamfer, and/or between the sealing rubber barrel and the retaining ring.

11. The new sliding sleeve according to claim 3 , wherein a surface of the chamfer and/or a surface of the retaining ring close to the sealing rubber barrel are/is uneven, so that a gap exists between the sealing rubber barrel and the chamfer, and/or between the sealing rubber barrel and the retaining ring.

12. The new sliding sleeve according to claim 3 , wherein a spacer is disposed on at least one side of the sealing rubber barrel, and at least one surface of the spacer is uneven, so that a gap exists between the sealing rubber barrel and the chamfer, and/or between the sealing rubber barrel and the retaining ring.

13. The new sliding sleeve according to claim 12 , wherein concave-convex teeth, and/or a groove, and/or a ring groove, are disposed on at least one surface of the spacer.

14. The new sliding sleeve according to claim 1 , wherein a movable space is formed among an inner surface of the outer housing, the inner sleeve and the lower connector, and a first dissolvable structure is filled in the movable space.

15. The new sliding sleeve according to claim 14 , wherein an inner diameter of the first dissolvable structure is larger than or equal to the inner diameter of the inner sleeve, and the inner diameter of the first dissolvable structure is larger than or equal to an inner diameter of the lower connector.

16. The new sliding sleeve according to claim 14 , wherein the first dissolvable structure is made of magnalium alloy, phenolic resin, urea resin, epoxy resin, or polyimide.

17. The new sliding sleeve according to claim 1 , wherein a second dissolvable structure is further filled in the groove.

18. The new sliding sleeve according to claim 17 , wherein an inner diameter of the second dissolvable structure is larger than or equal to the inner diameter of the inner sleeve.

19. The new sliding sleeve according to claim 17 , wherein the second dissolvable structure is made of magnalium alloy, phenolic resin, urea resin, epoxy resin, or polyimide.

20. The new sliding sleeve according to claim 1 , wherein an open/close structure is disposed between the inner sleeve and the outer housing, and the open/close structure enables the inner sleeve to be fixed when the inner sleeve closes or opens the flow guiding hole.

21. The new sliding sleeve according to claim 20 , wherein the open/close structure is an arched position-limiting elastic piece, wherein a protrusion is disposed on the arched position-limiting elastic piece, and the protrusion can be fitted into a first slot or a second slot correspondingly disposed on an inner surface of the outer housing.

22. The new sliding sleeve according to claim 20 , wherein the open/close structure is an anchor-fluke position-limiting elastic piece, wherein the anchor-fluke position-limiting elastic piece has anchor flukes, and the anchor flukes can be fitted into a first groove or a second groove correspondingly disposed on an inner surface of the outer housing.

23. The new sliding sleeve according to claim 20 , wherein a first slot is close to the upper connector, and a second slot is close to the lower connector, wherein a side wall of the first slot close to the upper connector gradually inclines towards the upper connector, and an angle between a side wall of the first slot close to the lower connector and an inner surface of the outer housing is larger than 45°; and wherein a side wall of the second slot close to the lower connector gradually inclines towards the lower connector, and an angle between a side wall of the second slot close to the upper connector and the inner surface of the outer housing is larger than 45°.

24. The new sliding sleeve according to claim 20 , wherein the open/close structure is an L-shaped groove, wherein an end of the L-shaped groove close to the lower connector is a closing block part extending along an axial direction of the inner sleeve, and an end of the L-shaped groove close to the upper connector is an opening block part extending along a direction perpendicular to an extending direction of the closing block part; and wherein the shear pin can be blocked at the closing bloc

Assignees

• China Petroleum & Chem Corp
• Sinopec Southwest Oil & Gas Co

Inventors

• Gan Zhenwei
• Qi Bin
• Hu Shunqu
• Hou Zhimin
• Lin Yongmao
• Liu Tao
• Chen Chen
• Wang Lei
• Hu Dan
• Qian Jiang

Classifications

• E21B34/14 Primary

  operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools {(E21B34/066 takes precedence)} · CPC title

• E21B34/063

  Valve or closure with destructible element, e.g. frangible disc (E21B34/103 takes precedence) · CPC title

• E21B43/26

  by forming crevices or fractures · CPC title

• E21B2200/06

  Sleeve valves · CPC title

• E21B2200/08

  Down-hole devices using materials which decompose under well-bore conditions · CPC title