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2 104 292

(13)

(51)

IPC

(21) (22)

Application

95100012/03, 1995-01-13

(22)

Actual filing date

1995-01-13

(45)

Published

1998-02-10

(72)

Inventor

Shvetsov O.K.Alaichev V.A.Zotov E.V.Oksenojd E.Ja.Lipkes M.I.Pod"Jacheva N.A.

(73)

Holder

Aktsionernoe Obshchestvo Zakrytogo Tipa Nauchno-Proizvodstvennoe Predprijatie Dor"

HEAT-SALT RESISTANT DRILLING MUD Russian patent published in 1998 - IPC

Abstract RU 2104292 C1

FIELD: petrochemical industry, particularly chemical treatment of clay solutions for drilling petroleum and gas wells. SUBSTANCE: drilling mud comprises (wt parts):1 protecting reagent; 1.25-40.0 clay and 16.5-315.0 water. The protecting reagent includes acrylic copolymer containing monomer units, wt. -%: acryl amide or methacryl amide, 20.-57.5; acrylic or methacrylic acid, 10.0-50.0; and 17.5- 50.0 acrylic acid nitrile, 17.5-50.0. EFFECT: improved properties of the heat and salt resistant drilling mud.

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RU 2 104 292 C1

Authors

Shvetsov O.K.

Alaichev V.A.

Zotov E.V.

Oksenojd E.Ja.

Lipkes M.I.

Pod"Jacheva N.A.

Dates

1998-02-10—Published

1995-01-13—Filed