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. 21, 1998
Filed:
Apr. 24, 1997
Jose Blanco, San Jose, VE;
Lirio Quintero, Las Mercedes, VE;
Intevep, S.A., Caracas, VE;
Abstract
A thermally stable well servicing fluid includes a fluid portion in the form of an oil-in-water emulsion; and a surfactant mixture including an anionic surfactant selected from the group consisting of alkali metal salts of alkyl sulphates, alkali metal salts of alkyl sulphonates, and mixtures thereof, and a non-ionic surfactant selected from the group consisting of ethoxylated alkyl phenols, ethoxylated aliphatic alcohols and mixtures thereof, the surfactant mixture containing the anionic surfactant and the non-ionic surfactant at a ratio by weight of between about 70:30 to about 80:20, the fluid being stable at temperatures exceeding 220.degree. F.