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:
Feb. 24, 2015
Filed:
Apr. 22, 2008
Abdelhakim Hahati, Evere-Bruxelles, BE;
Sébastian Desmette, Thieusies, BE;
Benoît Deschamps, Gottignies, BE;
Robert Delwiche, Brussels, BE;
Matthieu Naegel, Strasbourg, FR;
Abdelhakim Hahati, Evere-Bruxelles, BE;
Sébastian Desmette, Thieusies, BE;
Benoît Deschamps, Gottignies, BE;
Robert Delwiche, Brussels, BE;
Matthieu Naegel, Strasbourg, FR;
Total S.A., Courbevoie, FR;
Abstract
A bit for drilling wells has a front face with radial blades having cutting elements distributed around the front face. A space for forming a core is situated at the center of the front face. A cavity is provided for evacuating the core towards a periphery of the bit. At least a portion of the cavity is situated between adjacent blades. The cavity is delimited by two lateral surfaces and a clearance surface set back with respect to the front face, and the cavity is open in a direction opposite the clearance surface. The bit may be used in methods for drilling wells and makes it possible to rapidly drill wells of great depth in all types of rock without the risk of clogging.