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:
Aug. 22, 1989
Filed:
Apr. 01, 1988
Applicant:
Inventor:
Jean Thiery, Le Pecq, FR;
Assignee:
Institut Francais Du Petrole, Cedex, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
175 73 ; 175 45 ; 175 61 ;
Abstract
An assembly for driving a drilling tool in rotation about an axis related to the drilling tool from a drive column, rotating at its lower end about a second axis, with the axes being substantially convergent at the same point and forming therebetween an angle alpha. The assembly comprises in combination a remote controlled deflector adapted for creating a deviation of an angle alpha, a controller for controlling the value of the angle alpha, a guide for rotating a drilling tool and the drive column at its lower end about the axes relatively to the deflector and a controller for controlling the polar position of the deflector relatively to second axis.