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:
Jun. 07, 1994
Filed:
Jun. 29, 1993
Heinz Mueller, Monheim, DE;
Claus-Peter Herold, Mettmann, DE;
Stephan von Tapavicza, Erkrath, DE;
Michael Neuss, Cologne, DE;
Frank Burbach, Meersbusch, DE;
Henkel Kommanditgesellschaft auf Aktien, Dusseldorf, DE;
Abstract
The invention describes the use of selected esters, fluid at room temperature and with flash points above 80.degree. C., of C.sub.1-5 -monocarboxylic acids and mon- and/or polyfunctional alcohols as the oil phase, or a component of the oil phase of invert drilling muds which are suitable for environment-friendly development of petroleum or natural gas deposits and contain in a continuous oil phase a dispersed aqueous phase together with emulsifiers, weighting agents, fluid-loss additives and preferably further conventional additives. In a further embodiment the invention relates to invert drilling fluids of the type described, which are characterized in that the oil phase contains esters from C.sub.1-5 -monocarboxylic acids with mono- and/or polyfunctional alcohols preferably in admixture with other components from the class of ecologically acceptable compounds.