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:
May. 10, 1994
Filed:
Jul. 16, 1992
Andre Cendre, Cosne sur Loire, FR;
Jean-Baptiste Fay, Paris, FR;
Benoit Amaudric du Chaffaut, Voisins le Bretonneux, FR;
Institut Francais du Petrole, Rueil Malmaison Cedex, FR;
Abstract
The present invention is a device for the remote actuation of equipment (3) associated with a drill string (1) through a hydraulic displacement mechanism (10;53,58) co-operating with a distributor (7;25,26,27;47) associated with the drilling fluid. The displacement mechanism directly converts the hydraulic energy of the drilling fluid into actuating mechanical energy with the co-operation of no other fluid than the drilling fluid. The invention further relates to an actuating method using the device and has an application of directional drilling in the petroleum field.