发明名称 |
STEERABLE PILOTED DRILL BIT, DRILL SYSTEM, AND METHOD OF DRILLING CURVED BOREHOLES |
摘要 |
<p>The present invention provides apparatus and methods for controlled steering. One embodiment of the invention provides a bit body comprising a trailing end, a pilot section, and a reaming section. The trailing end is adapted to be detachably secured to a drill string. The pilot section is located on a leading, opposite end of the bit body. The reaming section is located intermediate to the leading and trailing ends. The pilot section comprises at least one steering device for steering the pilot section of the bit body, thereby steering the entire bit body. Another embodiment of the invention provides a wellsite system comprising a drill string; a kelly coupled to the drill string; and a bit body as described above. Another embodiment of the invention provides a method of drilling a curved borehole in a subsurface formation.</p> |
申请公布号 |
WO2010005881(A1) |
申请公布日期 |
2010.01.14 |
申请号 |
WO2009US49645 |
申请日期 |
2009.07.03 |
申请人 |
SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER CANADA LIMITED;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LIMITED;DOWNTON, GEOFFERY |
发明人 |
DOWNTON, GEOFFERY |
分类号 |
E21B7/06;E21B10/26 |
主分类号 |
E21B7/06 |
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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