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. 24, 2022
Filed:
Jan. 13, 2020
Applicant:
Lamberti Spa, Albizzate, IT;
Inventors:
Erik Gallo, Mottalciata, IT;
Lorena Bottarello, Solbiate Arno, IT;
Luigi Merli, Saronno, IT;
Pierangelo Pirovano, Comerio, IT;
Massimo Cecchetto, Oggiona con Santo Stefano, IT;
Laura Vigano′, Parabiago, IT;
Giovanni Floridi, Novara, IT;
Giuseppe Li Bassi, Gavirate, IT;
Assignee:
Lamberti SPA, Albizzate, IT;
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/34 (2006.01);
U.S. Cl.
CPC ...
C09K 8/34 (2013.01);
Abstract
A method of minimizing the weight loss of mass of the drilling pipe and wellbore casing while drilling a subterranean well with an oil-based drilling fluid comprising adding to the oil-based drilling fluid an anti-wear additive based on sulfated, sulfonated or sulfited natural oils or fats of vegetable or animal origin.