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. 04, 2017
Filed:
Jun. 20, 2013
Applicant:
Lamberti Spa, Albizzate (VA), IT;
Inventors:
Cristina Maria Picco, Oleggio, IT;
Massimo Cecchetto, Oggiona con Santo Stefano, IT;
Pierangelo Pirovano, Comerio, IT;
Luigi Merli, Saronno, IT;
Giovanni Floridi, Novara, IT;
Giuseppe Li Bassi, Gavirate, IT;
Assignee:
LAMBERTI SPA, Albizzate (VA), IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/36 (2006.01); C09K 8/42 (2006.01); C09K 8/64 (2006.01); C09K 8/82 (2006.01); E21B 43/16 (2006.01); C09K 8/502 (2006.01); E21B 7/00 (2006.01); E21B 31/03 (2006.01);
U.S. Cl.
CPC ...
C09K 8/36 (2013.01); C09K 8/42 (2013.01); C09K 8/502 (2013.01); C09K 8/64 (2013.01); C09K 8/82 (2013.01); E21B 7/00 (2013.01); E21B 43/16 (2013.01); C09K 2208/02 (2013.01); E21B 31/03 (2013.01);
Abstract
Water in oil emulsion drilling and well treatment fluids comprising an ester of trimer fatty acids and polyoxyethyiene glycol, the polyoxyethyiene glycol having average molecular weight from about (150) to about (600) and the trimer acids having at least about 20% of carboxyl acid groups esterified, as rheology modifier.