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:
Apr. 03, 2018
Filed:
Sep. 20, 2011
Applicant:
Kennedy John Kirkhope, Leduc, CA;
Inventor:
Kennedy John Kirkhope, Leduc, CA;
Assignee:
HALLIBURTON ENERGY SERVICES, INC., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 4/00 (2006.01); E21B 44/04 (2006.01); E21B 7/00 (2006.01);
U.S. Cl.
CPC ...
E21B 4/006 (2013.01); E21B 7/00 (2013.01); E21B 44/04 (2013.01);
Abstract
A drill string for drilling a subterranean wellbore includes a shaft connectable to a first drill string portion and a housing connectable to a second drill string portion. A torque relief section is disposed between the shaft and housing. The torque relief section includes a slip section operable to slip and release torque buildup when torque applied between the shaft and housing exceeds a threshold torque. The threshold torque of the torque relief section is selected to be within the range of about 110% and 150% of the operating torque and below the peak operating torque for the drill string.