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. 04, 1998
Filed:
Oct. 30, 1996
Vincent Maury, Idron Ousse Sendets, FR;
Jean-Claude Guerin, Idron Bizanos, FR;
Elf Aquitaine Production, , FR;
Abstract
The subject of the present invention is a stabilizer-reamer for drilling an oil well. The invention provides an improvement to drillpipe string stabilizers used when drilling an oil well. The purpose of the stabilizer, which forms the subject of the invention, is to allow the drillpipe string to be raised through fractured formations, in addition to its normal function of stabilizing the drillpipes. To this end, it is fitted with retractable abrasive blades which make it possible to re-drill the fractured formations when the drillpipes are being raised and to avoid jamming in the well. The main claims relate to the novel function of the stabilizer, to the geometry of its elements and to the mechanism of opening the blades.