Invention Grant
US09309723B2 Drill bits and tools for subterranean drilling, methods of manufacturing such drill bits and tools and methods of directional and off center drilling
有权
用于地下钻孔的钻头和工具,制造这种钻头和工具的方法以及定向和偏心钻削的方法
- Patent Title: Drill bits and tools for subterranean drilling, methods of manufacturing such drill bits and tools and methods of directional and off center drilling
- Patent Title (中): 用于地下钻孔的钻头和工具,制造这种钻头和工具的方法以及定向和偏心钻削的方法
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Application No.: US12898451Application Date: 2010-10-05
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Publication No.: US09309723B2Publication Date: 2016-04-12
- Inventor: Thorsten Schwefe , Cara D. Weinheimer
- Applicant: Thorsten Schwefe , Cara D. Weinheimer
- Applicant Address: US TX Houston
- Assignee: BAKER HUGHES INCORPORATED
- Current Assignee: BAKER HUGHES INCORPORATED
- Current Assignee Address: US TX Houston
- Agency: TraskBritt
- Main IPC: E21B10/43
- IPC: E21B10/43 ; E21B10/42

Abstract:
A drill bit may include a bit body including at least one blade extending at least partially over a cone region of the bit body. Additionally, the drill bit may include a plurality of cutting structures mounted to the at least one blade and a rubbing zone within the cone region of the at least one blade, wherein cutting structures within the rubbing zone have a reduced average exposure. Additionally, a method of directional drilling may include positioning a depth-of-cut controlling feature of a drill bit away from a formation to prevent substantial contact between the depth-of-cut controlling feature and rotating the drill bit off-center to form a substantially straight borehole segment. The method may also include positioning the depth-of-cut controlling feature of the drill bit into contact with the formation to control the depth-of-cut and rotating the drill bit on-center to form a substantially nonlinear borehole segment.
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