Invention Grant
- Patent Title: Method and apparatus for hydraulic steering of downhole rotary drilling systems
- Patent Title (中): 井下旋转钻井系统液压转向的方法和装置
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Application No.: US12955609Application Date: 2010-11-29
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Publication No.: US08302703B2Publication Date: 2012-11-06
- Inventor: Radovan Rolovic
- Applicant: Radovan Rolovic
- Applicant Address: US TX Sugar Land
- Assignee: Schlumberger Technology Corporation
- Current Assignee: Schlumberger Technology Corporation
- Current Assignee Address: US TX Sugar Land
- Agent Chadwick A. Sullivan
- Main IPC: E21B7/04
- IPC: E21B7/04 ; E21B17/10

Abstract:
A technique is used to control the direction of a drill bit or bottom hole assembly via hydraulic steering utilizing a plurality of steering pads. A portion of hydraulic fluid, e.g. drilling fluid, is directed under pressure to a pad interface region proximate each pad. The hydraulic fluid provides additional force against a surrounding wall and/or reduces or eliminates contact between the pads and the surrounding wall.
Public/Granted literature
- US20110162890A1 METHOD AND APPARATUS FOR HYDRAULIC STEERING OF DOWNHOLE ROTARY DRILLING SYSTEMS Public/Granted day:2011-07-07
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