发明名称 |
CASING HANGER SHOULDER RING FOR LOCK RING SUPPORT |
摘要 |
A wellhead assembly has a casing hanger for supporting a string of casing, the casing hanger having an external upward-facing shoulder. A shoulder ring is mounted on the shoulder. A radially movable annular lockdown member is carried on the shoulder ring for movement between a retracted position while the casing hanger is being run and an expanded position for engaging an interior surface of a wellhead housing. A casing hanger seal is carried by the casing hanger above the lockdown member. The casing hanger seal has a nose on a lower end that engages and moves the lockdown member to the expanded position while the casing hanger seal is being lowered into a set position. The shoulder ring is formed of a material of greater yield strength than the shoulder. Flow channels between the shoulder and the shoulder ring assist in flowing debris from above the shoulder to below. |
申请公布号 |
WO2016085620(A2) |
申请公布日期 |
2016.06.02 |
申请号 |
WO2015US58577 |
申请日期 |
2015.11.02 |
申请人 |
VETCO GRAY INC. |
发明人 |
GADRE, ANIRUDDHA, D.;MANSUKH, MAYUR;FORD, DAVID, LAWRENCE |
分类号 |
E21B33/03;E21B33/035;E21B33/04;E21B33/043 |
主分类号 |
E21B33/03 |
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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