发明名称 |
SYSTEM AND METHOD FOR TELEMETRY IN A WELLBORE |
摘要 |
A method and apparatus for creating a telemetry signal in a drillstring is disclosed. Opposite torsional forces are imparted on the drillstring at two or more different locations. A steel shaft inside the drillstring is coupled to the drillstring via electromagnetic actuators at end and rigidly attached to the drillstring at the other end. A similar method and apparatus for generating axial telemetry signal in the drillstring is also disclosed.</SDO AB>
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申请公布号 |
CA2395082(A1) |
申请公布日期 |
2001.06.28 |
申请号 |
CA20002395082 |
申请日期 |
2000.12.12 |
申请人 |
SCHLUMBERGER CANADA LIMITED |
发明人 |
COOK, JOHN MERVYN;JEFFRYES, BENJAMIN PETER;JENKINS, CHARLES RODERICK;MEEHAN, RICHARD JOHN |
分类号 |
E21B47/16;(IPC1-7):E21B47/16 |
主分类号 |
E21B47/16 |
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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