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:
Jan. 16, 1996
Filed:
Dec. 23, 1994
Applicant:
Inventors:
Benoit Amaudric du Chaffaut, Voisins Le Bretonneux, FR;
Jean Boulet, Paris, FR;
Assignee:
Institut Francais Du Petrole, Rueil-Malmaison, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
137-2 ; 137504 ; 166240 ; 175 61 ;
Abstract
The present invention relates to a device for actuating equipment from a distance through a flow variation of a fluid in a pipe. The device and method of this invention are suited for incorporation into a drill string.