发明名称 |
Casing cementing equipment |
摘要 |
Insert type floating equipment valves for use in the cementing of casing in oil and gas wells and the like which may be retained in the casing therein through the use of slips or set screws or anchors and uses either cup type or compression type sealing members.
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申请公布号 |
US5379835(A) |
申请公布日期 |
1995.01.10 |
申请号 |
US19930053127 |
申请日期 |
1993.04.26 |
申请人 |
HALLIBURTON COMPANY |
发明人 |
STREICH, STEVEN G. |
分类号 |
E21B33/129;E21B33/14;(IPC1-7):E21B33/12 |
主分类号 |
E21B33/129 |
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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