Blends of glycol derivatives as gas hydrate inhibitors in water

Details Blends of glycol derivatives as gas hydrate inhibitors in water Blends of glycol derivatives as gas hydrate inhibitors in water

1998-01-20

2000-12-26

Tucker, Philip

Earth boring, well treating, and oil field chemistry

Earth boring

Contains organic component

507136, 507261, 507266, 507925, C09K 702

Patent

active

061659452

ABSTRACT:
A drilling, drill-in, or completion fluid comprising water as a continuous phase, said continuous phase comprising a gas hydrate inhibiting amount of a blend comprising an ethylene glycol derivative and a propylene glycol derivative. The propylene glycol derivative is present in an amount effective to inhibit hydration of shale by the water base. The density of the fluid may be reduced by substituting the blend for salt, and by increasing the amount of propylene glycol derivative in the blend. The blend preferably should comprise at least about 10 vol % of the fluid, and a preferred ratio in the blend is about 35 vol % tripropylene glycol bottoms to about 65 vol % ethylene glycol.

REFERENCES:
patent: 2690814 (1954-10-01), Reid
patent: 5076364 (1991-12-01), Hale et al.
patent: 5635458 (1997-06-01), Lee et al.
patent: 5723524 (1998-03-01), Cohen et al.

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