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:
May. 04, 2004
Filed:
Dec. 06, 2002
Applicant:
Inventors:
Wayne S. Stewart, Bartlesville, OK (US);
Nathan E. Stacy, Bartlesville, OK (US);
Kelly B. Fox, Bartlesville, OK (US);
Bharat B. Patel, Bartlesville, OK (US);
Sam B. Ledbetter, Bartlesville, OK (US);
Alvin Evans, Bartlesville, OK (US);
Assignee:
Chevron Phillips Chemical Company, LP, The Woodlands, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 7/06 ;
U.S. Cl.
CPC ...
C09K 7/06 ;
Abstract
This invention relates to a low toxicity drilling mud oil. In some embodiments, the fluid loss characteristic of the drilling mud oil as used in a borehole can be reduced to less than 0.2 ml/30 minutes by adding about 0.05% to about 2.0% by weight of a butadiene-styrene-butadiene (BSB) block copolymer having about 20% by weight or more styrene.