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:
Dec. 08, 2015
Filed:
Jan. 14, 2011
Philippe Essel, Pau, FR;
Jean-marc Loriot, Paris, FR;
Christian Salesse, Laroche pres Feyt, FR;
Sebastian Desmette, Gosselies, BE;
Philippe Essel, Pau, FR;
Jean-Marc Loriot, Paris, FR;
Christian Salesse, Laroche pres Feyt, FR;
Sebastian Desmette, Gosselies, BE;
Other;
Abstract
A device for uncoupling a drill string, the device including, in a longitudinal direction: a first structure that is intended to be attached to a drill string tube; a second structure that is intended to hold a cutting tool for drilling and is translatable relative to the first structure; and a thruster assembly between the first structure and the second structure. The thruster assembly is configured to exert a thrusting force on the second structure to separate the second structure from the first structure, the thrusting force being constant for every position of the second structure relative to the first structure.