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:
Oct. 11, 2005
Filed:
Nov. 17, 2003
Jan Pieter Vijn, Leiderdorp, NL;
Christian E. Spindler, Wasserburg am Inn, DE;
Gregor Keilhofer, Tacherting, DE;
Johann Plank, Trostberg, DE;
Jan Pieter Vijn, Leiderdorp, NL;
Christian E. Spindler, Wasserburg am Inn, DE;
Gregor Keilhofer, Tacherting, DE;
Johann Plank, Trostberg, DE;
Halliburton Energy Services, Inc., Duncan, OK (US);
Degussa Construction Polymers GmbH, Trostberg, DE;
Abstract
Methods of cementing subterranean zones using cement compositions containing biogradable dispersants are provided. The methods are basically comprised of the steps of preparing a hydraulic cement, a biodegradable dispersant comprised of polyaspartic acid containing side chains formed by reacting one or more side chain chemicals with said polyaspartic acid and sufficient water to form a pumpable slurry, placing the cement composition into a zone to be cemented and allowing the cement composition to set into an impermeable solid mass therein.