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:
Apr. 07, 2015
Filed:
Mar. 30, 2012
Matthew G. Kellum, Spring, TX (US);
Lance E. Brothers, Chickasha, OK (US);
Matthew G. Kellum, Spring, TX (US);
Lance E. Brothers, Chickasha, OK (US);
Halliburton Energy Services, Inc., Houston, TX (US);
Abstract
A method of cementing in a subterranean formation may comprise: introducing a cement composition comprising cement, water, and a lignite-based copolymer into a subterranean formation, wherein the lignite-based copolymer comprises a lignite backbone, a first grafted monomer selected from the group consisting of -acrylamido-2-methylpropanesulfonic acid, a salt of 2-acrylamido-2-methylpropanesulfonic acid, and a second grafted monomer comprising N,N-dimethylacrylamide; and allowing the cement composition to set in the subterranean formation, wherein cement composition has a transition time of less than or equal to about 150 minutes.