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:
Nov. 09, 2021
Filed:
Jun. 28, 2018
Applicant:
Shell Oil Company, Houston, TX (US);
Inventors:
Paul Anthony Donegan McClure, Aberdeen, GB;
Jan-Jette Blangé, Rijswijk, NL;
Sergey Sotskiy, Houston, TX (US);
Assignee:
SHELL OIL COMPANY, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 7/06 (2006.01); E21B 10/61 (2006.01); E21B 10/60 (2006.01); E21B 17/18 (2006.01); E21B 10/55 (2006.01);
U.S. Cl.
CPC ...
E21B 7/064 (2013.01); E21B 10/602 (2013.01); E21B 10/61 (2013.01); E21B 17/18 (2013.01); E21B 10/55 (2013.01);
Abstract
A rotary steerable drill string () employs a drill bit () selected to positively contribute to underpressure in a preselected azimuthal segment of the borehole relative to an opposing azimuthal section. Generally, a high flow velocity of drilling fluid in the selected azimuthal segment relative to in other segments will result in a more pronounced underpressure in the selected azimuthal segment. Drill bit designs which locally enhance the drilling fluid flow velocity are proposed to be employed in the present rotary steerable drill string.