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:
Oct. 08, 2013
Filed:
Jun. 28, 2011
Applicants:
Michel Michaux, Verieres-le-Buisson, FR;
Jean-philippe Caritey, Le Plessis Robinson, FR;
Inventors:
Michel Michaux, Verieres-le-Buisson, FR;
Jean-Philippe Caritey, Le Plessis Robinson, FR;
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 33/13 (2006.01); C04B 24/26 (2006.01); C04B 28/02 (2006.01); C04B 14/00 (2006.01); C08K 3/00 (2006.01); C08K 5/00 (2006.01); C08K 5/53 (2006.01); C08K 3/38 (2006.01); C08G 18/48 (2006.01);
U.S. Cl.
CPC ...
Abstract
A retarder aid increases the applicable temperature range of phosphonate/borate cement-retarder systems to at least 302° C. (575° F.), and 207 MPa (30,000 psi). The retarder aid comprises a terpolymer of styrene sulfonate, maleic anhydride and acrylate of ethylene oxide. Cement slurries containing the retarder and retarder aid may be used for both primary-cementing and remedial-cementing applications.