发明名称 |
System and method for drilling lateral boreholes |
摘要 |
A drilling system for drilling a lateral borehole from a mail borehole comprises a tubular conduit through which a fluid can be pumped; and a drilling assembly connected to the tubular conduit so as to receive fluid pumped therethrough, the drilling assembly comprising: a power conversion unit, through which the fluid flows and which operates to provide a downhole power output; a drilling unit including a drilling apparatus powered by the output of the power conversion unit and operable to drill a lateral borehole into the formation surrounding the main borehole, and a liner unit for storing one or more liners for installation into the lateral borehole; and an anchor unit operable to anchor the drilling assembly in the main borehole when the drilling unit operates to drill the lateral borehole. A method of drilling a lateral borehole from a main borehole using such a drilling system comprises positioning the drilling assembly in the main borehole at a location of interest using the tubular conveyance; anchoring the drilling assembly in the main borehole using the anchor unit; operating the drilling unit to drill a lateral borehole from the main borehole; retrieving the drilling unit from the lateral borehole; releasing the anchor unit; and moving the drilling assembly to another location.
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申请公布号 |
EP2065553(A1) |
申请公布日期 |
2009.06.03 |
申请号 |
EP20070122050 |
申请日期 |
2007.11.30 |
申请人 |
SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT N.V. |
发明人 |
HOPKINS, CHRIS;NIINA, NOBUYOSHI;BONNER, STEPHEN |
分类号 |
E21B41/00;E21B4/02;E21B7/04;E21B23/01;E21B43/10;E21B44/00 |
主分类号 |
E21B41/00 |
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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