Abstract: The present patent application discloses a low toxicity and high biodegradability drilling fluid composition in the form of an inverse emulsion containing an oil phase and an aqueous phase, wherein said oil phase comprises a mixture of at least two diesters obtained from the esterification of a carboxylic acid and an alcohol. The selected diesters are suitable for use in drilling of crude oil or natural gas deposits, exhibiting good stability in the formulations assessed under conditions of high pressure and high temperature and in the presence of divalent salt brines.

Abstract: The present patent application discloses a low toxicity and high biodegradability drilling fluid composition in the form of an inverse emulsion containing an oil phase and an aqueous phase, wherein said oil phase comprises a mixture of at least two diesters obtained from the esterification of a carboxylic acid and an alcohol. The selected diesters are suitable for use in drilling of crude oil or natural gas deposits, exhibiting good stability in the formulations assessed under conditions of high pressure and high temperature and in the presence of divalent salt brines.

Abstract: The present invention relates to aqueous resin emulsions containing at least a non-ionic surfactant of general formula R1-(A1O)n-(A2O)x-(A3O)y—R2, obtained by the phase inversion emulsification process. In particular, the invention relates to aqueous resin emulsions commonly used in solvent-based paints, such as, for example, alkyd resins. Said emulsions are stabilized by non-ionic and anionic surfactant compositions which promote the inversion of the water-oil to oil-water phases in the presence of low water content, enabling water-oil type emulsions to be obtained with high productivity and high solids content, even in low shear conditions.

Abstract: The deposition of organic materials originating from crude oil, such as asphaltenes and paraffins, is deemed to compromise satisfactory oil exploration and production, because it clogs pores and equipment, compromising the operation performance. This problem may arise at various points during the operations of drilling, stimulating, fracturing, completing and cementing wells, production, transportation, refining and storage of oil and derivatives, including the use of the fluid in treatments for oil wells and reservoirs, well tubing and annuli, tubing, equipment, and tanks used in treatment processes, transportation and refining of oil and derivatives thereof. The present invention relates to a solvent composition to solubilize such deposits and incrustations.

Abstract: The present invention relates to aqueous resin emulsions containing at least a non-ionic surfactant of general formula R1—(A1O)n—(A2O)x—(A3O)y—R2, obtained by the phase inversion emulsification process. In particular, the invention relates to aqueous resin emulsions commonly used in solvent-based paints, such as, for example, alkyd resins. Said emulsions are stabilized by non-ionic and anionic surfactant compositions which promote the inversion of the water-oil to oil-water phases in the presence of low water content, enabling water-oil type emulsions to be obtained with high productivity and high solids content, even in low shear conditions.