Invention Grant
- Patent Title: Downhole drive shaft connection
- Patent Title (中): 井下驱动轴连接
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Application No.: US11956623Application Date: 2007-12-14
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Publication No.: US07900720B2Publication Date: 2011-03-08
- Inventor: David R. Hall , David Lundgreen , Paula Turner , Daryl Wise , Nathan Nelson , Andrew Pilgrim , Robert Myler
- Applicant: David R. Hall , David Lundgreen , Paula Turner , Daryl Wise , Nathan Nelson , Andrew Pilgrim , Robert Myler
- Applicant Address: US TX Houston
- Assignee: Schlumberger Technology Corporation
- Current Assignee: Schlumberger Technology Corporation
- Current Assignee Address: US TX Houston
- Agency: Holme Roberts & Owen LLP
- Main IPC: E21B7/08
- IPC: E21B7/08 ; E21B10/36

Abstract:
In one aspect of the present invention, a section of a drill string has a drill bit with a body intermediate a shank and a working face, the working face having at least one cutting element. A jack element is disposed within the drill bit body and has a distal end substantially protruding from the working face. A drive shaft is in communication with the jack element and a rotary source. The drive shaft has a first portion secured within a bore of a tool string component in the tool string and a second portion secured within a bore of the drill bit. The first and second portions of the drive shaft are connected at a pin and box connection wherein the first and second portions are automatically connected as the tool string component is mechanically coupled to the drill bit.
Public/Granted literature
- US20090152011A1 Downhole Drive Shaft Connection Public/Granted day:2009-06-18
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