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. 20, 2018
Filed:
Jul. 09, 2013
Applicant:
Nfluids Inc., Calgary, CA;
Inventors:
Maen Moh'd Husein, Calgary, CA;
Geir Hareland, Calgary, CA;
Assignee:
NFLUIDS INC., Calgary, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/36 (2006.01); C09K 8/516 (2006.01); E21B 33/138 (2006.01); C09K 8/502 (2006.01); E21B 21/00 (2006.01);
U.S. Cl.
CPC ...
C09K 8/36 (2013.01); C09K 8/502 (2013.01); C09K 8/516 (2013.01); E21B 21/003 (2013.01); E21B 33/138 (2013.01); C09K 2208/10 (2013.01);
Abstract
There is described a drilling fluid for wellbore strengthening having nanoparticles and granular particles. In one aspect described herein, the drilling fluid is an invert emulsion based fluid. In a further aspect, the nanoparticles are iron hydroxide or calcium carbonate, and in a further aspect from about 1 to 30 nm in size. In one aspect described herein, the granular particles are graphite or calcium carbonate and in a further aspect, up to 250 μm in size. The nanoparticles and granular particles plug fractures in the wellbore to strengthen the wellbore.