Invention Grant
- Patent Title: Apparatus and method to control the rotation of a downhole drill bit
- Patent Title (中): 控制井下钻头旋转的装置和方法
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Application No.: US11420915Application Date: 2006-05-30
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Publication No.: US07798246B2Publication Date: 2010-09-21
- Inventor: Anthony L. Collins
- Applicant: Anthony L. Collins
- Applicant Address: US TX Sugar Land
- Assignee: Schlumberger Technology Corporation
- Current Assignee: Schlumberger Technology Corporation
- Current Assignee Address: US TX Sugar Land
- Agent David J. Smith
- Main IPC: E21B47/00
- IPC: E21B47/00 ; E21B47/024
Abstract:
An apparatus and method to control the rotation of a downhole drill bit are disclosed. A pair of spaced-apart measuring or survey instruments at the drill string provide data that is analyzed to determine relative rotation between the instruments so that drag affecting the drill bit may be reduced.
Public/Granted literature
- US20080083564A1 APPARATUS AND METHOD TO CONTROL THE ROTATION OF A DOWNHOLE DRILL BIT Public/Granted day:2008-04-10
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