Method of recycling water contaminated oil based drilling fluid

Details Method of recycling water contaminated oil based drilling fluid Method of recycling water contaminated oil based drilling fluid

E - Fixed Constructions

21

B

E21B 21/06 (2006.01) B01D 17/02 (2006.01) B01D 17/04 (2006.01) C10G 33/04 (2006.01)

Patent

CA 2445227

A method for recycling an invert emulsion based drilling fluid, in which the invert emulsion based drilling fluid includes an oil component and an aqueous component. The method includes: mixing the invert emulsion drilling fluid with a emulsion clearing agent, wherein the emulsion clearing agent is a mixture of an anionic tensid and a non-ionic tensid; and separating the oil component of the invert emulsion drilling fluid from the aqueous component of the invert emulsion drilling fluid. The method preferably utilizes an emulsion breaking agent that is a combination of an anionic tensid and an alkyl polyglycoside tensid.

L'invention concerne un procédé permettant de recycler un fluide de forage à base d'émulsion inverse, ledit fluide comprenant un composant huileux et un composant aqueux. Ce procédé consiste à mélanger le fluide de forage à base d'émulsion inverse avec un agent de clarification d'émulsion, ledit agent de clarification étant composé du mélange d'un tenside anionique et d'un tenside non ionique; et à séparer le composant huileux du composant aqueux dans le liquide de forage à base d'émulsion inversée. Le procédé utilise, de préférence, un agent de fragmentation d'émulsion qui est une combinaison d'un tenside anionique et d'un tenside de polyglycoside d'alkyle.

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