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:
Dec. 22, 2020
Filed:
Jun. 30, 2017
Applicant:
Shell Oil Company, Houston, TX (US);
Inventors:
Daniele Di Crescenzo, New Orleans, LA (US);
William Robert Portas, Gautier, MS (US);
Assignee:
SHELL OIL COMPANY, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 33/14 (2006.01); E21B 21/00 (2006.01); E21B 33/126 (2006.01); E21B 21/10 (2006.01); E21B 7/20 (2006.01);
U.S. Cl.
CPC ...
E21B 33/14 (2013.01); E21B 7/20 (2013.01); E21B 21/001 (2013.01); E21B 21/10 (2013.01); E21B 33/126 (2013.01); E21B 33/143 (2013.01);
Abstract
A portion of a wellbore is drilled in a subterranean formation, using a drilling string () disposed within a casing string () and extending through a cement retainer () disposed within the casing string. The drilling string can be retracted into the casing string to a location fully above the cement retainer, and subsequently the casing string can be cemented in the wellbore whereby maintaining the drilling string inside the casing in the wellbore.