Threaded connections with an adjustable secondary shoulder

Patent metadata

Field	Value
Publication number	US-9638362-B2
Application number	US-201414268616-A
Country	US
Kind code	B2
Filing date	May 2, 2014
Priority date	May 2, 2014
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A tubular threaded connection includes a threaded sub-assembly having a first tubular member, a first torque member threadingly received on the first tubular member, and a second torque member threadingly received on the first tubular member. In forming the threaded sub-assembly, the first torque member is torqued relative to the second torque member. Furthermore, the sub-assembly is configured to receive a second tubular member for torqueing against the sub-assembly.

First claim

What is claimed is:

1. A tubular threaded connection comprising:
a threaded sub-assembly having a first tubular member, a first torque member threadingly received on the first tubular member, and a second torque member threadingly received on the first tubular member;
wherein the first tubular member comprised a pin end having an externally-disposed pin face and an externally-disposed pin threaded section;
wherein the first torque member is torqued relative to the second torque member,
wherein the sub-assembly receives a second tubular member for torqueing against the sub-assembly wherein;
the second tubular member comprises a box end having an inner box face, an outer box face, and an internally-disposed box threaded section extending between the outer box face and the inner box face; and
the inner box, face engages the pin face and forms a first interface therebetween, and the outer box face engages the second torque member and forms a second interface therebetween.

2. The tubular threaded connection of claim 1 further comprising the second tubular member threadingly received on the first tubular member and torqued against the sub-assembly.

3. The tubular threaded connection of claim 2 wherein the second tubular member is torqued against the pin face on the first tubular member and is torqued against a torque face on the second torque member.

4. The tubular threaded connection of claim 1 wherein the pin threaded section comprises a single, uninterrupted threaded portion.

5. The tubular threaded connection of claim 1 wherein the pin threaded section comprises two threaded portions, the first threaded portion having a thread characteristic that differs from the second threaded portion.

6. The tubular threaded connection of claim 5 wherein the first threaded portion of the first tubular member has a larger thread diameter than the second threaded portion.

7. The tubular threaded connection of claim 5 wherein the first torque member is threadingly coupled to the first threaded portion; and
wherein the box end of the second tubular member is threadingly coupled to the second threaded portion.

8. The tubular threaded connection of claim 7 wherein the second torque member is threadingly coupled to the second threaded portion.

9. The tubular threaded connection of claim 7 wherein the pin threaded section further comprises a third threaded portion disposed between the first and second threaded portions and having a thread characteristic that differs from the first and second threaded portions; and
wherein the second torque member is threadingly coupled to the third threaded portion.

10. A tubular threaded connection comprising:
a first tubular member comprising a pin end having externally-disposed pin face and an externally-disposed pin threaded section;
a first torque member threadingly coupled to the pin end; a second torque member threadingly coupled to the pin end while the first torque member is coupled to the pin end;
a second tubular member comprising a box end having an inner box face, an outer box face, and an internally-disposed box threaded section extending between the outer box face and the inner box face;
wherein the box end is threadingly coupled to the pin end while the first and second torque members are coupled to the pin end;
wherein the box end is further configured for the inner box face to engage the pin face to form a first interface therebetween;
wherein the second torque member is movable from a first position to a second position against the outer box face of the second tubular member to form a second interface therebetween; and
wherein the first torque member is movable from a third position to a fourth position against the second torque member to form a third interface therebetween.

11. The tubular threaded connection of claim 10 wherein the pin threaded section comprises two threaded portions, the first threaded portion having larger thread diameter than the second threaded portion.

12. The tubular threaded connection of claim 11 wherein the first torque member is threadingly coupled to the first threaded portion; and
wherein the box end of the second tubular member is threadingly coupled to the second threaded portion.

13. The tubular threaded connection of claim 12 wherein the second torque member is threadingly coupled to the second threaded portion.

14. The tubular threaded connection of claim 10 wherein the first, second, and third interfaces are each torqued.

Assignees

• Nat Oilwell Varco Lp

Inventors

• Marchand Nicholas Ryan

Classifications

• F16L15/007 Primary

  with more than one threaded section · CPC title

• E21B17/0423

  with plural threaded sections, e.g. with two-step threads · CPC title

• F16L15/08

  with supplementary elements (F16L15/04 takes precedence) · CPC title

• F16L2201/40

  for special environments · CPC title

• F16L15/00

  Screw-threaded joints; Forms of screw-threads for such joints · CPC title