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2 017 936

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C1

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IPC

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Application

4922373/03, 1991-03-28

(22)

Actual filing date

1991-03-28

(45)

Published

1994-08-15

(72)

Inventor

Valeeva T.G.Verderevskij Ju.L.Popova V.L.Mikheeva I.V.Kobjakov N.I.Aref'Ev Ju.N.Galimov R.R.

(73)

Holder

Nauchno-Issledovatel'Skij InstitutPermskij Nauchno-Issledovatel'Skij Institut BumagiNauchno-Proizvodstvennoe Ob"Edinenie Po Khimizatsii Tekhnologicheskikh Protsessov V Neftjanoj Promyshlennosti

ISOLATING COMPOUND Russian patent published in 1994 - IPC

Abstract RU 2017936 C1

FIELD: well drilling. SUBSTANCE: isolating compound contains, mas.%: urea-formaldehyde resin 10.0-25.0; hydrochloric acid 0.25- 1.0; technical lignosulfonate and the balance, water. Lignosulfonate is dissolved in water. Added to solution is hydrochloric acid and urea- formaldehyde, and thoroughly mixed. EFFECT: extended range of fluidity loss time. 2 cl, 1 tbl

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RU 2 017 936 C1

Authors

Valeeva T.G.

Verderevskij Ju.L.

Popova V.L.

Mikheeva I.V.

Kobjakov N.I.

Aref'Ev Ju.N.

Galimov R.R.

Dates

1994-08-15—Published

1991-03-28—Filed

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