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2 148 068

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C1

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IPC

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Application

98104171/03, 1998-03-05

(24)

Start date

1998-03-05

(22)

Actual filing date

1998-03-05

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Published

2000-04-27

(72)

Inventor

Rastegaev B.A.Pen'Kov A.I.Vakhrushev L.P.Koshelev V.N.Rjabokon' S.A.Mosin V.A.

(73)

Holder

Rastegaev Boris AleksandrovichPen'Kov Aleksandr IvanovichVakhrushev Leonid PetrovichKoshelev Vladimir NikolaevichRjabokon' Sergej AleksandrovichMosin Vladimir Anatol'Evich

METHOD OF PREPARING CLAY POWDER FOR DRILLING FLUIDS Russian patent published in 2000 - IPC

Abstract RU 2148068 C1

FIELD: oil and gas production. SUBSTANCE: clay with moisture content at least 5% (95.2-95.8%) is ground on ball mill together with soda ash plus composition containing high-molecular acrylic polymer or high-viscosity polyanion cellulose and low-molecular polysaccharide-origin polymer at their ratio 1: (1-2.5). Resultant product meets API standard for drilling fluids, i.e. yield at least 16 cu.m/g, filtration no higher than 15 cu.cm at pressure gradient 0.7 MPa. EFFECT: reduced preparation expenses. 9 tbl

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RU 2 148 068 C1

Authors

Rastegaev B.A.

Pen'Kov A.I.

Vakhrushev L.P.

Koshelev V.N.

Rjabokon' S.A.

Mosin V.A.

Dates

2000-04-27—Published

1998-03-05—Filed

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