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:
Jul. 03, 2007
Filed:
Jun. 25, 2001
Annie Audibert Hayet, Croissy sur Seine, FR;
Jean-francois Argillier, Saint Cloud, FR;
Daniel Longeron, Sartrouville, FR;
Carine Dewattines, Belgique, BE;
Michel Janssen, Belgique, BE;
Annie Audibert Hayet, Croissy sur Seine, FR;
Jean-Francois Argillier, Saint Cloud, FR;
Daniel Longeron, Sartrouville, FR;
Carine Dewattines, Belgique, BE;
Michel Janssen, Belgique, BE;
Institut Francais du Petrole, Rueil Malmaison Cedex, FR;
Oleon N.V., Ertvelde, BE;
Abstract
The present invention relates to a method and to a fluid for drilling or workover in a well running through a porous permeable formation, wherein a water-based well fluid circulates in said well. In the method, at most 3% by weight of a composition obtained from fat, or an oil, and an alcohol, is added to the fluid in addition to the conventional constituents for such a fluid, the chain lengths of the acid and alcohol parts being chosen such that the ester thus obtained has sufficient dispersion in water, compatibility with said constituents, does not form an emulsion with the reservoir oil and adsorbs sufficiently on the porous formation.