Systems, methods, and devices for isolating portions of a wellhead from fluid pressure

Patent metadata

Field	Value
Publication number	US-9376883-B2
Application number	US-201313975328-A
Country	US
Kind code	B2
Filing date	Aug 24, 2013
Priority date	Feb 25, 2008
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

A wellhead system is provided. In one embodiment, the wellhead system includes a bypass sleeve for temporarily isolating portions of a wellhead assembly from pressurized fracing fluid. The bypass sleeve may include a generally tubular body having a tool interface, a lock ring disposed at least partially around the body, and an anti-rotation device coupled to the body. In some embodiments, the anti-rotation device includes a resilient member disposed in a cavity in the body, and an anti-rotation member biased away from the body by the resilient member. The anti-rotation member of some embodiments extends radially outward from the body.

First claim

The invention claimed is:

1. A system, comprising:
a wellhead assembly comprising:
a tubing head having a flange configured to couple to a blowout preventer through a top surface of the flange;
a bypass sleeve disposed substantially entirely within the tubing head and below the top surface of the flange; and
a sleeve restraint configured to form a seal within the wellhead assembly above the bypass sleeve,
wherein the sleeve restraint comprises a first flange, and the bypass sleeve comprises a second flange that overlaps the first flange, wherein the second flange axially abuts the sleeve restraint, and the first flange is radially outward from the second flange.

2. The system of claim 1 , wherein the bypass sleeve comprises a recessed surface configured to receive a distal portion of a locking pin extending from the tubing head.

3. The system of claim 1 , comprising a lock ring disposed at least partially around the sleeve restraint.

4. The system of claim 3 , comprising an anti-rotation device extending between the wellhead assembly and the sleeve restraint.

5. The system of claim 1 , comprising a seal member disposed between the sleeve restraint and the bypass sleeve.

6. The system of claim 1 , wherein the tubing head is configured to couple with at least one valve assembly through an exterior wall of the tubing head.

7. A system, comprising:
a wellhead assembly comprising:
a tubular having a flange with a top surface;
a valve coupled to a side wall of the tubular;
a bypass sleeve disposed substantially entirely within the tubular and below the top surface of the flange; and
a sleeve restraint configured to form a seal within the wellhead assembly above the bypass sleeve,
wherein the sleeve restraint comprises a first flange, and the bypass sleeve comprises a second flange that overlaps the first flange, wherein the first flange is radially outward from the second flange.

8. The system of claim 7 , comprising a lock ring disposed at least partially around the sleeve restraint.

9. The system of claim 8 , comprising an anti-rotation device extending between the wellhead assembly and the sleeve restraint.

10. The system of claim 7 , comprising a seal member disposed between the sleeve restraint and the bypass sleeve.

Assignees

• Cameron Int Corp

Inventors

• Nguyen Dennis P
• Painter Jay Patrick
• Guidry Kirk Paul

Classifications

• E21B33/04

  Casing heads; Suspending casings or tubings in well heads · CPC title

• E21B33/03

  Well heads; Setting-up thereof · CPC title

• E21B23/00 Primary

  Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (setting of casings, screens or liners E21B43/10) · CPC title

• E21B33/068 Primary

  having provision for introducing objects or fluids into, or removing objects from, wells (cementing-heads E21B33/05) · CPC title