STRAIGHT-BORE BACK PRESSURE VALVE

• US 20110011575A1
• Filed: 03/19/2009
• Published: 01/20/2011
• Est. Priority Date: 04/09/2008
• Status: Active Grant

• Current Assignee: Cameron International Corporation (SLB)
• Original Assignee: Cameron International Corporation (SLB)
• Inventors: Contreras, Maria R., Nguyen, Dennis P.
• Granted Patent: US 8,636,058 B2
• Time in Patent Office: Days
• US Class Current: 166/87.1
• CPC Class Codes: E21B 23/01 for anchoring the tools or the like E21B23/02 - E21B23/06 take precedence; anchoring of drives in the borehole E21B4/18
• CPC Class Codes: E21B 23/04 operated by fluid means, e.g. actuated by explosion E21B23/08 takes precedence
• CPC Class Codes: E21B 23/06 for setting packers
• CPC Class Codes: E21B 33/1285 by fluid pressure
• CPC Class Codes: E21B 33/129 with mechanical slips for hooking into the casing E21B33/122, E21B33/124 take precedence
• CPC Class Codes: E21B 34/025 Chokes or valves in wellheads and sub-sea wellheads for variably regulating fluid flow
• CPC Class Codes: Y10T 137/7837 Direct response valves [i.e., check valve type]
• CPC Class Codes: Y10T 137/7904 Reciprocating valves

Abstract

A system in some embodiments includes a back pressure valve. The back pressure valve includes a body, a plunger disposed internal to the body, and a friction member disposed about the exterior of the body. The friction member is configured to expand radially to contact an internal surface of a bore. In some embodiments, a method includes disposing a back pressure valve into a straight bore and expanding a friction member of the back pressure valve radially into contact with an internal surface of the straight bore.

Claims

1. A system, comprising:

a back pressure valve, comprising;

a body;

a plunger disposed internal to the body; and

a friction member disposed about the exterior of the body, wherein the friction member is configured to expand radially to contact an internal surface of a bore.

2. The system of claim 1, comprising the bore, wherein the internal surface of the bore comprises a straight bore and the friction member is radially expanded in the straight bore.

3. The system of claim 1, wherein the body comprises a recess and the friction member is disposed in the recess.

4. The system of claim 3, wherein the recess comprises a tapered face angled relative to a longitudinal axis of the back pressure valve and the friction member comprises a complementary tapered face.

5. The system of claim 4, wherein the friction member is configured to expend radially in response to movement along the recess in a direction generally along the longitudinal axis of the back pressure valve.

6. The system of claim 1, wherein the friction member comprises a plurality of segments.

7. The system of claim 1, wherein the friction member comprises a C-ring.

8. The system of claim 1, comprising an outer sleeve disposed about the exterior of the body.

9. The system of claim 8, wherein the outer sleeve is configured to engaged the friction member in a direction generally along an axis of the back pressure valve.

10. The system of claim 8, comprising a seal, wherein the outer sleeve is configured to engage the seal in a direction generally along a longitudinal axis of the back pressure valve.

11. The system of claim 1, comprising a locking ring disposed about an upper portion of the body.

12. The system of claim 11, wherein the locking ring is configured to secure the friction member in a radially expanded position.

13. The system of claim 1, comprising a seal disposed about a lower portion of the body.

14. The system of claim 13, wherein the seal comprises a MEC seal or an LS seal.

15. A system, comprising:

a back pressure valve, comprising;

a body comprising a recess about its exterior, wherein the recess comprises an tapered external face angled relative to a longitudinal axis of the back pressure valve; and

a friction member disposed in the recess, wherein the friction member comprises a complementary tapered internal face that abuts the tapered external face, and an external friction face of the friction member comprises a coarse texture.

16. The system of claim 15, wherein the coarse texture comprises one or more indentations, teeth, or a combination thereof.

18. The system of claim 15, wherein the coarse texture comprises a coating.

19. The system of claim 15, wherein the friction member is configured to expand the friction member in a radial direction in response to an axial force.

20. The system of claim 15, wherein the back pressure valve is configured to install in a straight bore.

17. (canceled)

21-30. -30. (canceled)

31. A system, comprising:

a back pressure valve, comprising;

a body comprising a central bore and an external groove and a hydraulic port, wherein the external groove comprises a tapered external face;

a friction member disposed in the external groove, wherein the friction member comprises;

a tapered internal face that is complementary to the tapered external face;

an external friction ring face;

an upper friction ring face, and

a lower friction ring face;

an outer sleeve disposed about the exterior of the body and between the locking ring and the friction member, and comprising a window disposed on two sides of the friction member;

a plunger disposed in the central bore of the body;

a locking ring comprising a slot and disposed about the exterior of the body; and

a back pressure valve running tool, comprising;

a first body portion, comprising;

a stem that protrudes along a longitudinal axis of the first body portion;

a complementary hydraulic port that passes through the first body portion and that is configured to align with the hydraulic port of the body of the back pressure valve;

a check valve disposed in the hydraulic port;

a shoulder configured to transfer a load parallel to the longitudinal axis of the first body portion; and

slots configured to transfer between the first body portion and internal protrusions of a second body portion a rotational torque about the longitudinal axis of the first body portion; and

the second body portion comprising the internal protrusions and external protrusions configured to transfer a rotational torque to the slot of the locking ring of the back pressure valve.