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:
Mar. 28, 2006
Filed:
Jan. 15, 2003
Applicants:
Kevin H. Schilling, Muscatine, IA (US);
Michael Riley, Muscatine, IA (US);
Roger E. Mcpherson, Muscatine, IA (US);
Inventors:
Kevin H. Schilling, Muscatine, IA (US);
Michael Riley, Muscatine, IA (US);
Roger E. McPherson, Muscatine, IA (US);
Assignee:
Grain Processing Corporation, Muscatine, IA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 7/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed are drilling fluids that include carboxyalkylated corn hulls in an amount effective to inhibit fluid loss from a wellbore formation. The carboxyalkylated corn hulls are heat stable and surprisingly effective at inhibiting fluid loss. Also disclosed are a drilling apparatus and a drilling process.