The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 18, 2001
Filed:
Jan. 28, 2000
Michael Russell, Cheltenham, GB;
Smart Stabilizer Systems Limited, Cheltenham, GB;
Abstract
A controllable stabilizer (,) in which an outer sub-assembly (,) is rotatably mounted around an inner sub-assembly (,). An annulus (,) is movably mounted around the outer sub-assembly (,) to be radially displaced in a predetermined direction by selective hydraulic energisation of individual pistons (,) in a piston/cylinder array (,). The piston(s) selected to be energised are determined by a directionally-sensitive control system (,). The outer sub-assembly (,) carries a hydraulic pump (,) operated by a driving mechanism (,) carried on the inner sub-assembly (,); this pump (,) provides hydraulic power for the pistons (,). An alternator (,) is similarly mounted and driven to provide on-board electrical power for the control system (,). In use, the annulus (,) functions as a well-bore-contacting stabilizer casing, and the controllable stabilizer (,) provides a directionally controlled deviation to a drillstring (,) so enabling directional drilling, and full control of changes in direction without interruption of drilling.