CLAY POWDER FOR DRILLING FLUIDS Russian patent published in 1998 - IPC

Abstract RU 2118647 C1

FIELD: drilling fluids. SUBSTANCE: clay powder contains 68.5-84.0% of subbentonite clay, 1.0-1.5% of sodium carbonate, and 15.0-30.0% of chamber or low-quality chrysotile asbestos. Such composition allows preparing drilling fluids with low plasticity coefficient, low filtration, and high yield. EFFECT: improved working characteristics of drilling fluids. 2 tbl

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RU 2 118 647 C1

Authors

Polubabkin V.A.

Kashkarov N.G.

Sandakov A.V.

Kuznetsov V.I.

Dates

1998-09-10—Published

1996-04-09—Filed