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, 2018
Filed:
Jan. 08, 2014
Applicant:
Nov Downhole Eurasia Limited, Stonehouse, Gloucestershire, GB;
Inventors:
Assignee:
NOV Downhole Eurasia Limited, Gloucestershire, GB;
Primary Examiner:
Int. Cl.
CPC ...
E21B 10/43 (2006.01); E21B 10/26 (2006.01); E21B 10/55 (2006.01); E21B 10/54 (2006.01);
U.S. Cl.
CPC ...
E21B 10/43 (2013.01); E21B 10/26 (2013.01); E21B 10/55 (2013.01); E21B 2010/545 (2013.01);
Abstract
A drill bit comprises at least one blade, comprising a plurality of cutting elements in the form of polycrystalline diamond cutters disposed on a leading edge of the blade, at least one diamond impregnated cutting region, disposed behind the leading edge of the blade, and wherein at least one of the cutters disposed on the leading, edge is an off-tip cutting element, arranged so that it does not engage with the formation during drilling until bit wear has taken place.