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:
Aug. 30, 2011
Filed:
Nov. 10, 2010
Applicants:
Simon Neil Duncum, Bracknell, GB;
Christopher Alan Sawdon, Par, GB;
Inventors:
Simon Neil Duncum, Bracknell, GB;
Christopher Alan Sawdon, Par, GB;
Assignee:
BP Exploration Operating Company Limited, Middlesex, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 21/00 (2006.01); E21B 33/138 (2006.01); E21B 43/25 (2006.01); C09K 8/03 (2006.01); C09K 8/502 (2006.01); C09K 8/504 (2006.01); C09K 8/506 (2006.01);
U.S. Cl.
CPC ...
Abstract
A wellbore fluid comprising a base fluid and a particulate bridging agent comprised of a sparingly water-soluble material selected from the group consisting of melamine (2,4,5-triamino-1,3,5-triazine), lithium carbonate, lithium phosphate (LiPO), and magnesium sulfite.