发明名称 |
Method and apparatus for driving pipe |
摘要 |
A casing hammer for driving casing while drilling a water well comprises a housing having an annular pneumatic chamber with a relatively lightweight, short-stroke annular piston. The piston is reciprocably driven at a high rate to provide a large number of light blows of controllable energy upon an annular anvil that seals one end of the chamber. Percussive blows upon the anvil are transmitted through a drive head and adapter to the upper end of the pipe to be driven. The hammer is suspended from a rotary drive head that operates a hollow drill string extending downwardly through the hammer and through the casing driven thereby.
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申请公布号 |
US4232752(A) |
申请公布日期 |
1980.11.11 |
申请号 |
US19780888312 |
申请日期 |
1978.03.20 |
申请人 |
SERVICE EQUIPMENT DESIGN CO., INC. |
发明人 |
HAUK, ERNEST D.;KIRKPATRICK, JESSE C. |
分类号 |
E21B1/02;E21B6/00;E21B7/20;(IPC1-7):E21B1/02 |
主分类号 |
E21B1/02 |
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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