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. 15, 1995
Filed:
Apr. 19, 1994
Applicant:
Inventors:
D V Gupta, The Woodlands, TX (US);
Bethicia B Prasek, Houston, TX (US);
Richard D Horn, Spring, TX (US);
Assignee:
The Western Company of North America, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166300 ; 166308 ; 507201 ; 507211 ; 507921 ; 507922 ;
Abstract
The present invention is directed to new enzyme breakers for breaking fracturing fluids or blocking gels, wherein the enzyme breakers only have activity above a selected temperature, i.e., no activity below the selected temperature or only active in a narrow temperature range. The present invention is preferably specifically directed to hemicellulase enzyme breakers only having activity above 100.degree. F., 150.degree. F., 200.degree. F., or 250.degree. F. and the method of making and use thereof.