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. 09, 2016
Filed:
Dec. 04, 2011
Simon G. James, Le Plessis-Robinson, FR;
Simon G. James, Le Plessis-Robinson, FR;
SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US);
Abstract
Particulate polymeric materials may be added to a cement slurry to adjust the linear thermal-expansion coefficient of the set cement. The coefficient of the set cement is optimized by considering the linear thermal-expansion coefficient of the casing, as well as the mechanical properties of the formation rock. When placed in a subterranean well having at least one casing string, cement sheaths with optimal linear thermal-expansion coefficients may be subjected to lower compressive and tensile stresses during downhole-temperature changes. Such cement slurries are particularly advantageous in the context of thermal-recovery wells.