发明名称 |
Automatic drilling system |
摘要 |
An automatic drilling system is disclosed which includes an electric servo motor operatively coupled to a winch brake control, a servo controller operatively coupled to the servo motor, and a drum position encoder rotationally coupled to a winch drum. The controller is adapted to operate the servo motor in response to measurements of position made by the encoder so that a selected rate of rotation of the drum is maintained.
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申请公布号 |
US2004195004(A1) |
申请公布日期 |
2004.10.07 |
申请号 |
US20030667296 |
申请日期 |
2003.09.17 |
申请人 |
POWER DAVID J.;GLASSER GERHARD P. |
发明人 |
POWER DAVID J.;GLASSER GERHARD P. |
分类号 |
E21B19/08;E21B44/02;(IPC1-7):E21B19/08 |
主分类号 |
E21B19/08 |
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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