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:
Jul. 05, 2016
Filed:
Apr. 11, 2011
Ines Khalfallah, Issy les Moulineaux, FR;
Matteo Loizzo, Berlin, DE;
Katia Dennis, Morangis, FR;
Loic Regnault DE LA Mothe, Le Chesnay, FR;
Sylvaine Le Roy-delage, Paris, FR;
Ines Khalfallah, Issy les Moulineaux, FR;
Matteo Loizzo, Berlin, DE;
Katia Dennis, Morangis, FR;
Loic Regnault de la Mothe, Le Chesnay, FR;
Sylvaine Le Roy-Delage, Paris, FR;
SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US);
Abstract
Compositions for well cementing comprise a pumpable slurry of cement, water and at least one additive that swells in contact with an underground fluid (hydrocarbon, water or brines or mixtures thereof). In case of failure of the cement matrix after setting, the additive swells when contacted by the underground fluid and restores zonal isolation. The swelling additive is an elastomer compounded with an aqueous inverse emulsion of particles of a polymer comprising a betaine group.