发明名称 |
DIRECTIONAL DRILLING APPARATUS |
摘要 |
In a directional drilling apparatus in which a sensor/transmitter or sonde is located in one section of a drill string and an element of an adjacent section is configured to "steer" the bore drilled in a predetermined lateral direction, means is provided for automatically ensuring correct registry or alignment of the sensor/transmitter and the steerable element, this means comprising an azimuth member on the section carrying the sensor/transmitter engageable with a reference member of the adjoining section to present, after such engagement, relative rotation of the azimuth member, which is rotatable in the section carrying it, with the sensor/transmitter, but non-rotatably connected with the sonde. The reference member or the azimuth member is resiliently displaceable axially to allow the two sections to be screwed up together.
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申请公布号 |
WO0047860(A2) |
申请公布日期 |
2000.08.17 |
申请号 |
WO2000GB00452 |
申请日期 |
2000.02.11 |
申请人 |
HALCO DRILLING INTERNATIONAL LIMITED;FALVEY, ALISTAIR, MICHAEL;GARTSIDE, JOHN, WILLOUGHBY |
发明人 |
FALVEY, ALISTAIR, MICHAEL;GARTSIDE, JOHN, WILLOUGHBY |
分类号 |
E21B7/04;E21B7/08;E21B10/36;E21B17/02;E21B17/046;(IPC1-7):E21B/ |
主分类号 |
E21B7/04 |
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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