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Patent Searching and Data


Title:
ECCENTRIC STABILIZER FOR SYNCHRONOUS ROTARY STEERABLE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2015/127345
Kind Code:
A3
Abstract:
A method and apparatus for steering a drilling assembly (200) during drilling operations for oil and gas. The steering assembly being disposed in a borehole (10) and comprising a drill bit (120) attached to a drill collar (210) having an eccentric stabilizer (220) disposed thereupon. The eccentric stabilizer either in an engaged state whereupon rotating concentrically with the drill collar, or in a released state whereupon as the drill collar rotates the eccentric stabilizer is positioned eccentrically relative to the drill collar creating a lateral deflection in the borehole that may be used for changing the direction of the drilling assembly.

Inventors:
BARTEL ROGER P (US)
Application Number:
PCT/US2015/017048
Publication Date:
March 10, 2016
Filing Date:
February 23, 2015
Export Citation:
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Assignee:
WEATHERFORD LAMB (US)
International Classes:
E21B7/06; E21B17/10
Foreign References:
US4319649A1982-03-16
GB2121453A1983-12-21
US3856096A1974-12-24
Attorney, Agent or Firm:
MCDERMOTT, Sean (Cabello Lutsch, Rutherford & Brucculeri LLP,20333 Sate Highway 249, Suite 60, Houston TX, US)
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