Use of selected ester oils in drilling fluids and muds

US5232910A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Heinz Mueller · Monheim, DE
• Claus-Peter Herold · Mettmann, DE
• Stephan von Tapavicza · Erkrath, DE
• Douglas J. Grimes · Fulford, GB
• Jean-Marc Braun · Celle, DE
• Stuart Paul Smith · Stamford, GB

Key dates

• Filing date: Sep 6, 1991
• Grant date: Aug 3, 1993
• Expiry date: Sep 6, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K8/34
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Invert emulsion muds for drilling of gas and oil, which are environmentally safe, and which contain: PA1 A. a continuous oil phase composed predominantly of at least one monocarboxylic acid ester of a C.sub.2 -C.sub.12 monofunctional alkanol wherein the monocarboxylic acid contains from 16 to 24 carbon atoms and is olefinically mono- or poly-unsaturated, PA1 B. a disperse aqeuous phase, PA1 C. at least one emulsifier, PA1 D. at least one weighting agent, PA1 E. at least one fluid loss additive, and PA1 F. a mild alkaline reserve.