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:
Mar. 16, 1999
Filed:
Sep. 19, 1997
Applicant:
Inventors:
Maria Isabel Hernandez, Caracas, VE;
Manuel Mas, Caracas, VE;
Reinaldo Jacques Gabay, Caracas, VE;
Lirio Quintero, Caracas, VE;
Assignee:
Intevep, S.A., Caracas 1070A, VE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
507117 ; 507140 ; 507135 ;
Abstract
A thermally stable drilling fluid system includes drilling fluid and an additive wherein the additive includes styrene-butadiene copolymers having an average molecular weight greater than about 500,000 g/mol, wherein the drilling fluid system exhibits fluid loss control at high temperature and high pressure conditions.