| 发明名称 |
Gripping member for well tools |
| 摘要 |
A unitary tubular cylindrical gripping member for well tools has variable angled gripping surfaces formed thereon by a plurality of insert teeth elements arranged to provide constant positive gripability of the gripping member in well casings.
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| 申请公布号 |
US4212352(A) |
申请公布日期 |
1980.07.15 |
| 申请号 |
US19790001499 |
申请日期 |
1979.01.08 |
| 申请人 |
DRESSER INDUSTRIES INC |
发明人 |
UPTON, THOMAS E |
| 分类号 |
E21B23/01;E21B33/129;F16L55/128;(IPC1-7):E21B23/00 |
主分类号 |
E21B23/01 |
| 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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