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. 21, 2017
Filed:
Oct. 23, 2012
Applicant:
Shell Oil Company, Houston, TX (US);
Inventors:
Darrell Scott Costa, Katy, TX (US);
William Robert Portas, Jr., Gautier, MS (US);
Djurre Hans Zijsling, Rijswijk, NL;
Assignee:
SHELL OIL COMPANY, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 43/10 (2006.01); E21B 7/20 (2006.01);
U.S. Cl.
CPC ...
E21B 43/10 (2013.01); E21B 7/20 (2013.01); E21B 43/103 (2013.01);
Abstract
The invention relates to a method for drilling and casing a wellbore using a drilling rig having a predetermined load capacity, using a casing scheme comprising two or more casing strings, and at least one combined casing string, which includes a first one of the casing strings fitting within a second casing string. The weight of the at least one combined casing string may exceed the load capacity of the drilling rig, and the weight of each of the parts of the at least one combined casing string is less than the load capacity.