Tubing connector

• US 5,156,206 A
• Filed: 06/27/1991
• Issued: 10/20/1992
• Est. Priority Date: 06/27/1991
• Status: Expired due to Fees

• Current Assignee: Halliburton Company
• Original Assignee: Otis Engineering Corporation (Halliburton Company)
• Inventors: Cox, Don C.
• Primary Examiner(s): Neuder, William P.
• Application Number:
  US07/722,130
• Time in Patent Office: 481 Days
• Field of Search: 166/384, 166/68, 166/106, 166/105, 166/380, 166/208, 166/242, 285/322, 285/323
• US Class Current: 166/242.2
• CPC Class Codes: E21B 17/04 between rod or the like and bit or between rod and rod or the like
• CPC Class Codes: F16D 1/096 the ring or rings being located between the shaft and the hub
• CPC Class Codes: F16L 19/06 in which radial clamping is obtained by wedging action on non-deformed pipe ends
• CPC Class Codes: F16L 19/10 the profile of the ring being altered

Abstract

A connector for connecting tubing to a component in a downhole well completion system in which a sub is provided for connection to the component and a sleeve extends over a portion of the sub to define a mandrel for receiving the tubing. A plurality of locking slips extend in windows provided through the sub and are forced into locking engagement with the reeled tubing as the sleeve is advanced over the sub to transfer axial and torsional loads from the component to the tubing.

Claims

1. A connector for connecting tubing to a component in a manner to transfer loads between said tubing and said component, said connector comprising:

a first member for connecting to said component;

a second member defining, with said first member, a bore for receiving said tubing;

said first and second members adapted for movement relative to each other; and

locking means cooperating with at least one of said members and actuatable upon said movement to transfer axial and torsional loads between said component and said tubing.

2. The connector of claim 1 wherein said first member is a sub member adapted for threaded connection to said component, and said second member is a sleeve having an end portion adapted to extend over a corresponding end portion of said sub member.

3. The connector of claim 2 wherein said locking means is in the form of a plurality of locking slips supported by said sub member.

4. The connector of claim 3 wherein said locking slips are disposed in respective angularly-spaced windows formed through said sub member.

5. The connector of claim 3 wherein said sleeve member engages said locking slips upon said movement for forcing said locking slips into locking engagement with said tubing.

6. The connector of claim 5 further comprising cooperating threads formed on said sub member and said sleeve member for connecting said members as said sleeve member is rotated and advanced over said sub member to effect said movement.

7. The connector of claim 6 wherein a portion of the inner surface of said sleeve member is tapered in a manner to force said locking slips radially inwardly into engagement with said tubing upon said advancement of said sleeve member over said sub member.

8. The connector of claim 3 further comprising a plurality of teeth formed on the inner surfaces of said locking slips for engaging said tubing.

9. The connector of claim 2 further comprising seal means extending between said tubing and said sub member.

10. The connector of claim 9 wherein said seal means comprises an annular groove formed in the inner surface of said sub member and an elastomeric seal ring disposed in said groove for engaging said tubing.

11. The connector of claim 9 wherein said seal means comprises a metal-to-metal seal ring having a first end adapted to engage the corresponding end of said sub member and a second end adapted to be engaged by said sleeve member.

12. The connector of claim 11 further comprising cooperating threads formed on said sub member and said sleeve member for connecting said members as said sleeve member is rotated and advanced over said sub member to effect said movement.

13. The connector of claim 12 wherein a portion of the end surface of said sleeve member is tapered in a manner to force said seal ring radially inwardly into engagement with said tubing upon said advancement of said sleeve member over said sub member.

14. The connector of claim 11 wherein said seal means further comprises an annular groove formed in the inner surface of said sub member and an elastomeric seal ring disposed in said groove for engaging said tubing.

15. The connector of claim 2 further comprising a cap member adapted to move relative to said sleeve member and having a bore for receiving said tubing.

16. The connector of claim 15 further comprising additional locking means supported by said sleeve member and adapted to engage said tubing upon said movement of said cap member with said sleeve member in a manner to transfer axial and torsional loads between said component and said tubing.

17. The connector of claim 16 wherein said additional locking means is in the form of a plurality of additional locking slips disposed in angularly-spaced windows formed through said sleeve member.

18. The connector of claim 17 wherein said cap member engages said additional locking slips upon said movement of said cap member with said sleeve member for forcing said additional locking slips into locking engagement with said tubing.

19. The connector of claim 18 further comprising cooperating threads formed on said cap member and said sleeve member for connecting said members as said cap members is rotated and advanced over said sleeve member to effect said movement.

20. The connector of claim 19 wherein a portion of the inner surface of said cap member is tapered in a manner to force said additional locking slips radially inwardly into engagement with said tubing upon said connection of said cap sub to said sleeve member.

21. The connector of claim 16 further comprising a plurality of teeth formed on the inner surface of said additional locking slips for engaging said tubing.

22. The connector of claim 1 wherein said component has a rotating member and wherein the connector transfers axial and torsional loads between said component and said tubing.

23. The connector of claim 2 further comprising means formed on the inner surface of said sub member for defining a load-transfer surface for engagement by the corresponding end of said tubing to locate said tubing relative to said members.

24. A connector for connecting reeled tubing to a component in a manner to transfer loads therebetween, said connector comprising:

a sub member for connecting to said component;

a sleeve member;

said sub member and said sleeve member adapted for movement relative to each other;

a cap member;

said sleeve member and said cap member adapted for movement relative to each other;

said sub member, said sleeve member and said cap member defining a bore for receiving said reeled tubing;

first locking means supported by said sub member and responsive to said movement between said sleeve member and said sub member for engaging said tubing in a manner to transfer axial and torsional loads between said component and said reeled tubing; and

second locking means supported by said sleeve member and responsive to said movement between said cap member and said sleeve member for engaging said tubing in a manner to transfer axial and torsional loads between said component and said reeled tubing.

25. The connector of claim 24 wherein said sleeve member and said cap member respectively engage said first and second locking means upon said movements for forcing said first and second locking means into locking engagement with said tubing.

26. The connector of claim 25 wherein said first and second locking means are in the form of a plurality of locking slips disposed in corresponding angularly-spaced windows formed through said sleeve member and said sub member, respectively.

27. The connector of claim 26 further comprising cooperating threads formed on said sub member, said sleeve member and said cap member for connecting said sleeve member to said sub member and said cap member to said sleeve member as said sleeve member is rotated and advanced over said sub member and as said cap member is rotated and advanced over said sleeve member, respectively to effect said respective movements.

28. The connector of claim 27 wherein a portion of the inner surfaces of said sleeve member and said cap member are tapered in a manner to force said locking slips radially inwardly into engagement with said tubing upon said advancements.

29. The connector of claim 27 further comprising a plurality of teeth formed on the inner surface of said locking slips for engaging said tubing.

30. The connector of claim 24 further comprising seal means extending between said tubing and said sub member.

31. The connector of claim 30 wherein said seal means comprises an annular groove formed in the inner surface of said sub member and an elastomeric seal ring disposed in said groove for engaging said tubing.

32. The connector of claim 30 wherein said seal means is in the form of a metal-to-metal seal ring having a first end adapted to engage said sub member and a second end adapted to be engaged by said sleeve member.

33. The connector of claim 32 further comprising cooperating threads formed on said sub member and said sleeve member for connecting said members as said sleeve member is rotated and advanced over said sub member to effect said movement between said sub member and said sleeve member.

34. The connector of claim 33 wherein portions of the end surface of said sleeve member is tapered in a manner to force said seal ring radially inwardly into engagement with said tubing upon said advancement of said sleeve member over said sub member.

35. The connector of claim 32 wherein said seal means further comprises an annular groove formed in the inner surface of said sub member and an elastomeric seal ring disposed in said groove for engaging said tubing.

36. The connector of claim 24 further comprising means formed on the inner surface of said sub member for defining a load-transfer surface for engagement by the corresponding end of said tubing to locate said tubing relative to said members.

37. A connector for attaching a well tool to a tubing string in a manner to transfer axial and torsional loads between the well tool and the tubing string comprising:

a plurality of hollow tubular means;

means for attaching the tubular means to each other to form a mandrel with a longitudinal bore therethrough;

one of the tubular means having an opening to allow insertion of the tubing string into the longitudinal bore;

one of the tubular means having heavy-duty threads for attachment of the well tool to the connector; and

locking means cooperating with at least one of the tubular means and actuatable upon operative engagement of the tubing string with the connector in a manner to transfer axial and torsional loads between the well tool and the tubing string.

38. The connector as defined in claim 37 wherein the means for attaching the tubular means to each other comprises:

a reduced diameter portion formed on one end of the tubular means and an enlarged diameter portion formed on the other end of the tubular means;

an opening in the enlarged diameter portion which is sized to receive the reduced diameter portion of another tubular means therein; and

matching threads on the interior of enlarged diameter portion and the exterior of the reduced diameter portion whereby adjacent tubular means are attached to each other.

39. The connector as defined in claim 38 wherein the locking means further comprises:

a plurality of windows extending radially through the reduced diameter portion of one of the tubular means;

a locking slip disposed in each window; and

the enlarged diameter portion of another tubular means having a tapered inside diameter which projects the locking slips radially inwardly when the reduced diameter portion of one tubular means is engaged with the enlarged diameter portion of another tubular means.

40. The connector as defined in claim 39 wherein the locking slips have a plurality of teeth formed on their inner surface to engage the exterior of the tubing string adjacent thereto.

41. A connector for attaching a well completion tool to a continuous length of reeled tubing comprising:

an elongated mandrel having a longitudinal bore with an opening on the upper end of the mandrel so that one end of the reeled tubing can be inserted into the longitudinal bore;

the mandrel being formed by a plurality of hollow tubular means which at least partially define the longitudinal bore;

a reduced diameter portion formed on one end of one tubular means and an enlarged diameter portion formed on one end of another tubular means;

an opening in the enlarged diameter portion which is sized to receive the reduced diameter portion;

matching threads on the interior of the enlarged diameter portion and the exterior of the reduced diameter portion whereby adjacent tubular means are attached to each other to form the elongated mandrel; and

locking means cooperating with at least one of the tubular means and actuatable upon engagement of the reeled tubing with the connector and upon the attachment of the adjacent tubular means to transfer axial and torsional loads between the well completion tool and the reeled tubing.

42. The connector of claim 41 wherein one of the tubular means has a heavy-duty threaded portion for attachment with the well tool.

43. The connector of claim 42 wherein the heavy-duty threaded portion is positioned below the locking means.

44. The connector of claim 43 wherein the locking means comprises:

a plurality of windows extending radially through the reduced diameter portion of one of the tubular means;

a locking slip disposed in each window; and

the enlarged diameter portion having a tapered inside diameter which projects the locking slips radially inward when the reduced diameter portion is engaged with the enlarged diameter portion.

45. The connector of claim 44 wherein one of the tubular means comprises a load transfer surface defined in part by annular flange spaced longitudinally from the locking means and extending radially into the longitudinal bore to engage the lower end of the reeled tubing.

46. The connector of claim 45 wherein multiple locking means are provided to allow the reeled tubing to support well completion tools up the tensile strength limits of the reeled tubing.