发明名称 |
HIGH TEMPERATURE BACK PRESSURE VALVE |
摘要 |
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. |
申请公布号 |
SG11201503284P(A) |
申请公布日期 |
2015.05.28 |
申请号 |
SG11201503284P |
申请日期 |
2013.10.11 |
申请人 |
VETCO GRAY INC. |
发明人 |
HE, HENRY, X.;MOVALFAGH, BEHROOZ, A.;SHANNON, CHRISTINA |
分类号 |
E21B33/04;E21B34/02 |
主分类号 |
E21B33/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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