Nghia T Tran

US Patent:

20130220628, Aug 29, 2013

Filed:

Feb 29, 2012

Appl. No.:

13/408948

Inventors:

Nghia T. Tran - Houston TX, US

Assignee:

CAMERON INTERNATIONAL CORPORATION - Houston TX

International Classification:

E21B 29/12
E21B 33/035

US Classification:

166360, 166368

Abstract:

A cap for protecting a sealing surface of a hub of a subsea device includes an equalization valve and a fluid conduit. The equalization valve includes a valve body having a pressure equalization conduit, a sleeve disposed about the valve body and having a port allowing fluid communication across the sleeve, and a valve spring configured to bias the sleeve to a closed position. The sleeve is configured to move to an open position in response to a force that depresses the sleeve and causes the valve spring to compress and the port is fluidly isolated from the pressure equalization conduit in the closed position and is in fluid communication with the pressure equalization conduit in the open position. In the open position, an interior environment of the subsea device is in fluid communication with the environment outside the cap through the equalization valve.