发明名称 |
Apparat og fremgangsmÕter for kommunikasjon med nedihullsutstyr ved Õ benytte borestrengsrotasjon og gyroskopiske sensorer |
摘要 |
<p>Apparatus and methods are utilized for controlling downhole equipment attached to a drill string by the transmission of commands from the surface of the earth. The drill string is rotated at the surface of the earth sequentially through one or more discrete angles of rotation to generate a command code. The sequence of discrete angular rotations is sensed downhole by a gyroscope and decoded as a command in a microprocessor. Alternately, a command code is transmitted by sequentially rotating the drill string at different angular rates which are likewise sensed by the gyroscope and decoded in the microprocessor. The microprocessor then transmits the decoded command to the controlled equipment.</p> |
申请公布号 |
NO20003920(D0) |
申请公布日期 |
2000.08.02 |
申请号 |
NO20000003920 |
申请日期 |
2000.08.02 |
申请人 |
SCHLUMBERGER HOLDINGS LTD |
发明人 |
MOUGEL, BERNARD;HUTIN, REMI |
分类号 |
E21B47/12;(IPC1-7):E21B |
主分类号 |
E21B47/12 |
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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