Invention Grant
- Patent Title: Directional drilling using a rotating housing and a selectively offsetable drive shaft
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Application No.: US14650204Application Date: 2012-12-19
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Publication No.: US09957755B2Publication Date: 2018-05-01
- Inventor: Jacob A. Schurmann
- Applicant: Halliburton Energy Services, Inc.
- Applicant Address: US TX Houston
- Assignee: Halliburton Energy Services, Inc.
- Current Assignee: Halliburton Energy Services, Inc.
- Current Assignee Address: US TX Houston
- Agency: Baker Botts L.L.P.
- Agent Alan Bryson
- International Application: PCT/US2012/070600 WO 20121219
- International Announcement: WO2014/098842 WO 20140626
- Main IPC: E21B7/06
- IPC: E21B7/06 ; E21B3/00 ; E21B4/04

Abstract:
Example systems described herein may include a housing 201 and an offsetable drive shaft 202 coupled to a drill bit 203 and at least partially disposed within the housing 201. The offset angle of the offsetable drive shaft 202 may determine an angle of the drill bit face. A motor 204 may be coupled to the housing 201 that, when activated, independently rotates the housing 201. By independently counter-rotating the housing 201 relative to a drill string during drilling operations, the angular orientation of the offsetable drive shaft 202 and drill bit 203 may remain geo-stationary with respect to the surrounding formation, without requiring that the housing 201 engage a borehole wall.
Public/Granted literature
- US20150308193A1 DIRECTIONAL DRILLING USING A ROTATING HOUSING AND A SELECTIVELY OFFSETABLE DRIVE SHAFT Public/Granted day:2015-10-29
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