Drilling mud additive comprising ferrous sulfate and poly(N-viny

Details Drilling mud additive comprising ferrous sulfate and poly(N-viny Drilling mud additive comprising ferrous sulfate and poly(N-viny

1991-11-07

1993-04-20

Geist, Gary L.

Earth boring, well treating, and oil field chemistry

Earth boring

Contains organic component

C09K 702

Patent

active

052043207

ABSTRACT:
A water based drilling fluid composition and an additive for water based drilling fluid compositions having as components poly(N-vinyl-2-pyrrolidone/sodium 2-acrylamido-2-methylpropane sulfonate) and ferrous sulfate useful in controlling high temperature water loss in drilling a well to recover oil and gas from a subterranean formation in a hostile environment and their methods of use.

REFERENCES:
patent: 4076628 (1978-02-01), Clampitt
patent: 4486318 (1984-12-01), Green
patent: 4541485 (1985-09-01), Block
patent: 4644020 (1987-02-01), Stahl
patent: 4743383 (1988-05-01), Stewart et al.
patent: 4951921 (1990-08-01), Stahl et al.

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