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. 23, 1991
Filed:
Jun. 19, 1989
Applicant:
Inventors:
Ansell L Reid, Spring, TX (US);
Henry A Grichuk, Rosenberg, TX (US);
Assignee:
Nalco Chemical Company, , DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
252-8512 ; 252-8515 ; 252-8551 ; 2523151 ;
Abstract
Water absorbent polymers provided, in the form of a thixotropic hydrocarbon gel, demonstrate controlled water absorption. This property enables improved usage of such polymers in the reduction of the loss of circulation fluid or as a viscous sweep in the drilling of subterranean wells.