DRILLING FLUID Russian patent published in 1998 - IPC

Abstract RU 2118646 C1

FIELD: drilling fluids. SUBSTANCE: drilling fluid than can be used under high formation pressure and hydrogen sulfide corrosion conditions contains, wt %: magnesium chloride, 3.0-3.7; alkali 0.5-0.85; carboxymethylcellulose, 0.18-0.25; monopotassium phosphate, 4.5-4.6; dipotassium phosphate, 37-45; condensed sulfite- alcohol distillery dreg or ferrochromelignosulfonate (protective reagent), 3.5-4.5; magnetite (weighting agent), 9.5-26.5; and water, the balance. EFFECT: increased stability and hydrogen sulfide absorption capacity. 1 tbl

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RU 2 118 646 C1

Authors

Mosin V.A.

Lukovnikov V.P.

Vasin A.V.

Lamosov M.E.

Dates

1998-09-10—Published

1993-08-02—Filed