Title:
HIGH TEMPERATURE BACK PRESSURE VALVE
Document Type and Number:
WIPO Patent Application WO/2014/070418
Kind Code:
A3
Abstract:
A back pressure valve for sealing a wellbore. The back pressure valve has a cylindrical body with threads designed to engage threads in the opening of a tubing hanger within the wellbore. The back pressure valve also has a metal sealing surface. When the threads of the back pressure valve engage the threads in the opening of the tubing hanger, the metal sealing surface of the valve seals against the metal of the tubing hanger, forming a metal to metal seal.
Inventors:
HE HENRY X (CA)
MOVALFAGH BEHROOZ A (CA)
SHANNON CHRISTINA (CA)
MOVALFAGH BEHROOZ A (CA)
SHANNON CHRISTINA (CA)
Application Number:
PCT/US2013/064591
Publication Date:
November 27, 2014
Filing Date:
October 11, 2013
Export Citation:
Assignee:
VETCO GRAY INC (US)
International Classes:
E21B34/02; E21B33/04
Foreign References:
| GB835902A | 1960-05-25 | |||
| US20100007097A1 | 2010-01-14 | |||
| US20110011575A1 | 2011-01-20 | |||
| US2241288A | 1941-05-06 | |||
| US2148327A | 1939-02-21 | |||
| US2958336A | 1960-11-01 |
Attorney, Agent or Firm:
CONKLIN, Mark, A. et al. (Global Patent Operation2 Corporate Drive, Suite 64, Shelton CT, US)
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