Oil in water emulsion well servicing fluids

Details Oil in water emulsion well servicing fluids Oil in water emulsion well servicing fluids

1997-04-24

1998-07-21

Tucker, Philip

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

567134, 567135, 567136, 567259, 567261, 252311, C09K 702

Patent

active

057835250

ABSTRACT:
A thermally stable well servicing fluid includes a fluid portion in the form of an oil-in-water emulsion; and a surfactant mixture including an anionic surfactant selected from the group consisting of alkali metal salts of alkyl sulphates, alkali metal salts of alkyl sulphonates, and mixtures thereof, and a non-ionic surfactant selected from the group consisting of ethoxylated alkyl phenols, ethoxylated aliphatic alcohols and mixtures thereof, the surfactant mixture containing the anionic surfactant and the non-ionic surfactant at a ratio by weight of between about 70:30 to about 80:20, the fluid being stable at temperatures exceeding 220.degree. F.

REFERENCES:
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patent: 5310002 (1994-05-01), Blauch et al.
patent: 5318709 (1994-06-01), Wuest et al.
patent: 5323857 (1994-06-01), Pirri et al.
patent: 5439059 (1995-08-01), Harris et al.
patent: 5535834 (1996-07-01), Naraghi et al.
patent: 5652200 (1997-07-01), Davies et al.

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