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. 21, 2010
Filed:
Jan. 10, 2007
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 ...
C09K 8/03 (2006.01); C09K 8/502 (2006.01); C09K 8/504 (2006.01); C09K 8/506 (2006.01); E21B 21/00 (2006.01); E21B 33/138 (2006.01); E21B 43/25 (2006.01);
U.S. Cl.
CPC ...
Abstract
Wellbore fluid containing a base fluid and a particulate bridging agent comprised of melamine. A method is also described of forming a removable filter cake on the walls of a wellbore that penetrates a porous and permeable rock formation by placing in the wellbore a wellbore fluid containing a base fluid and melamine, and permitting the melamine to deposit from the wellbore fluid onto or into the walls of the wellbore to form the filter cake, whereby fluid loss to the formation through the removable filter cake is reduced.