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:
Apr. 10, 2018
Filed:
Oct. 25, 2012
Applicant:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Inventors:
Michel Michaux, Verrieres-le-Buisson, FR;
Jean-Philippe Caritey, Le Plessis Robinson, FR;
Laurent Gabilly, Malakoff, FR;
Assignee:
SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K 8/42 (2006.01); C09K 8/24 (2006.01); C09K 8/40 (2006.01); C09K 8/46 (2006.01); E21B 33/13 (2006.01);
U.S. Cl.
CPC ...
C09K 8/24 (2013.01); C09K 8/40 (2013.01); C09K 8/424 (2013.01); C09K 8/46 (2013.01); E21B 33/13 (2013.01);
Abstract
Spacer fluids that are stable at temperatures up to at least 260° C. comprise water, polystyrene sulfonate and a mixture of particulate materials. The particulate materials may be chosen such that the mixture has at least a trimodal particle-size distribution. The fluids may further comprise inorganic clays, mutual solvents and surfactants.