Viscosification of high density brines

Details Viscosification of high density brines Viscosification of high density brines

1997-01-17

1998-07-28

Brunsman, David

Compositions: coating or plastic

Coating or plastic compositions

Carbohydrate or derivative containing

10620572, 1062177, 10628726, 529 28, 529 35, 529 42, 529 43, 524 44, 524 45, 524 55, 524386, 524388, 507100, 507110, 507111, 507112, 507113, 507114, 507115, 507117, 507118, 507119, 507209, 507211, 507212, 507213, 507214, 507215, 507216, 507217, 507222, 507224, C09K 300, C09K 700, C09K 702, C09K 706

Patent

active

057857474

ABSTRACT:
The present invention provides compositions useful for viscosifying aqueous fluids, methods for making them and methods for using them. In one aspect of the invention, inventive compositions comprise a prehydrating alcohol having at least two hydroxyl groups and having a molecular weight of from about 60 to about 600; an inorganic salt; and a polymer. In a preferred aspect of the invention, the viscosifier composition additionally comprises a solvent having a molecular weight of from about 75 to about 1000. According to another aspect of the invention, inventive compositions comprise a prehydrating alcohol; an inorganic salt; and a polymer; and the composition is essentially free from water. Inventive compositions find advantageous use in viscosifying fluids utilized in subterranean drilling activities such as, for example, drilling, drill-in, completion, hydraulic fracturing, work-over, packer, well treating, testing, spacer, or hole abandonment fluids.

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