Title:
CASING RELIEF VALVE
Document Type and Number:
WIPO Patent Application WO/2012/149431
Kind Code:
A3
Abstract:
A pressure relief valve assembly may be coupled to one or more casings and/or tubular members to control fluid communication therebetween. The valve assembly is a one-way valve assembly that relieves pressure within an annulus formed between adjacent casings and/or tubular members to prevent burst or collapse of the casings and/or tubular members. The valve assembly includes a tubular body having a port for fluid communication and a valve ring disposed within the tubular body, the valve ring having a flap for closing the port, wherein the flap is configured to flex from a closed position to an open position in response to a pressure differential. In another embodiment, the valve assembly also includes a retainer sleeve movable from an engaged position for maintaining the flap in a closed position to a disengaged position to allow the flap to open.
Inventors:
MORRISON JEFFERY (US)
Application Number:
PCT/US2012/035604
Publication Date:
October 31, 2013
Filing Date:
April 27, 2012
Export Citation:
Assignee:
WEATHERFORD LAMB (US)
MORRISON JEFFERY (US)
MORRISON JEFFERY (US)
International Classes:
E21B34/06; E21B23/02
Foreign References:
| US3606926A | 1971-09-21 | |||
| US20080121397A1 | 2008-05-29 | |||
| US3294108A | 1966-12-27 | |||
| US3223109A | 1965-12-14 |
Attorney, Agent or Firm:
PATTERSON, William B. et al. (LLP3040 Post Oak Blvd., Suite 150, Houston TX, US)
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