USE OF SURFACE-ACTIVE ESTER SULPHONATE SALTS IN WATER-BASED AND OIL-BASED BORE-FLUSHING AGENTS AND OTHER OIL-WELL DRILLING FLUIDS

摘要

Is used as environmentally allowable emulsifiers of water-in-oil or oil-in-water surfactants salts of sulfonated esters inherently containing organically bound sulfur, at least in most compounds and acid carboxylic olefinically unsaturated one and / or several times, having at least 8 carbon atoms and monohydric and / or polyhydric lower alcohols (ester sulfonate salts). These salts are used in fluid solutions and well pumpable sewage or other wellbore fluid treatment agents having, in addition to an aqueous phase, an oily phase dispersed or closed, and are useful to exploit not deleteriously to the environment of organic layers, for example oil or natural gas deposits. The invention particularly relates to solutions inverted wells cleaning based on a continuous oil phase containing a dispersed aqueous phase, and emulsifiers and other conventional additives, for example thickeners, filtrate reducers, agents weighting agents, salts soluble in water and alkaline reserves. These solutions inverted wells flushing are characterized in that they contain, in addition environmentally admissible oil phase, surface-active salts of sulfonate ester of the type described as emulsifiers or emulsifier components.