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:
Sep. 16, 2014
Filed:
Mar. 08, 2011
Charles David Armstrong, Tomball, TX (US);
Hoang Le, Spring, TX (US);
Bharath Rajappa, Englewood, CO (US);
Qi Qu, Spring, TX (US);
Charles David Armstrong, Tomball, TX (US);
Hoang Le, Spring, TX (US);
Bharath Rajappa, Englewood, CO (US);
Qi Qu, Spring, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
The allosteric effectors, sulfate and phosphate, can be used with mannanohydrolase enzymes to better control the break of gelled fracturing fluids in wellbore operations. The fracturing fluid contains a hydratable polymer of guar, a guar derivative, a cellulose derivative, a water soluble biopolymer or a combination thereof and a crosslinking agent. The mannanohydrolase enzyme catalyzes the hydrolysis of β-(1,4) mannosidic linkages to break the polymeric backbone.