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:
May. 22, 2018
Filed:
Oct. 28, 2011
Applicants:
Michel Michaux, Verrieres-le-Buisson, FR;
Laurent Gabilly, Malakoff, FR;
Inventors:
Michel Michaux, Verrieres-le-Buisson, FR;
Laurent Gabilly, Malakoff, FR;
Assignee:
Schlumberger Technology Corporation, Sugar Land, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B 28/04 (2006.01); E21B 33/13 (2006.01); C04B 24/00 (2006.01); C04B 40/00 (2006.01); C09K 8/467 (2006.01); C04B 103/22 (2006.01);
U.S. Cl.
CPC ...
C04B 24/006 (2013.01); C04B 28/04 (2013.01); C04B 40/0039 (2013.01); C09K 8/467 (2013.01); E21B 33/13 (2013.01); C04B 2103/22 (2013.01);
Abstract
Cement retarders are based on blends of lignosulfonate compounds, borate compounds and gluconate compounds. The compounds are present in certain ratios that allow the retarders to operate at temperatures and pressures up to and exceeding about 176° C. and 152 MPa. The retarders may also be provided in liquid form, improving their suitability for use at offshore well-site locations.