发明名称 |
Subsurface well apparatus having improved operator means and method for using same |
摘要 |
A surface-controlled wire-line retrieval subsurface safety valve apparatus and method of utilizing the safety valve having a rotatable ball closure element and a movable operator mechanism that controls the operating stroke when the valve is operably installed as well as moving the ball and seat into sealing engagement.
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申请公布号 |
US4044835(A) |
申请公布日期 |
1977.08.30 |
申请号 |
US19760698884 |
申请日期 |
1976.06.23 |
申请人 |
HYDRIL COMPANY |
发明人 |
MOTT, JAMES D. |
分类号 |
E21B34/00;E21B34/10;(IPC1-7):E21B43/12 |
主分类号 |
E21B34/00 |
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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