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:
Jan. 14, 1997
Filed:
Mar. 27, 1996
Applicant:
Inventors:
Roland Audebert, Saint-Leu-La-Foret, FR;
Joseph Janca, La Rochelle, FR;
Pierre Maroy, Buc, FR;
Hugo Hendriks, Grenoble, FR;
Assignee:
Dowell Schlumberger Incorporated, Sugar Land, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
524-5 ; 524-2 ; 524-6 ;
Abstract
The invention relates to a new, chemically crosslinked PVA. Its application is that of a fluid loss control agent in fluids used in the oil industry, in particular cement slurries, separating fluids, or 'spacers', and drilling muds. Its advantages are that it does not delay the setting of the cement, that it has high temperature properties that are relatively insensitive to external conditions.