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. 30, 2024
Filed:
Jun. 04, 2020
Applicants:
Akita University, Akita, JP;
Kaneka Corporation, Osaka, JP;
Inventors:
Shigemi Naganawa, Akita, JP;
Ryutaro Mukai, Settsu, JP;
Assignees:
AKITA UNIVERSITY, Akita, JP;
KANEKA CORPORATION, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/035 (2006.01); C09K 8/12 (2006.01); C09K 8/52 (2006.01);
U.S. Cl.
CPC ...
C09K 8/035 (2013.01); C09K 8/12 (2013.01); C09K 8/52 (2013.01); C09K 2208/08 (2013.01);
Abstract
An object of the present invention is to provide an environmentally friendly drilling fluid that has excellent cuttings transport capability and excellent hole cleaning capability. A drilling fluid according to the present disclosure is a drilling fluid containing water, biodegradable fibers, and a thickener. The thickener contains a biodegradable polysaccharide. The content of the biodegradable polysaccharide in the drilling fluid is greater than or equal to 0.01 g/L and less than or equal to 5 g/L.