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2 242 492

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(51)

IPC

(21) (22)

Application

2003102472/03, 2003-01-29

(24)

Start date

2003-01-29

(22)

Actual filing date

2003-01-29

(45)

Published

2004-12-20

(72)

Inventor

Fatkhutdinov I.Kh.Andreson B.A.Bochkarev G.P.Chetvertneva I.A.Babushkin A.B.

(73)

Holder

Dochernee Obshchestvo S Ogranichennoj Otvetstvennost'Ju Nauchno-Issledovatel'Skij I Proektnyj Institut Nefti" Otkrytogo Aktsionernogo Obshchestva Neftjanaja Kompanija

DRILLING FLUID FOR DRILLING IN COLLAPSING ROCKS AND EXPOSING PRODUCTIVE FORMATIONS Russian patent published in 2004 - IPC

Abstract RU 2242492 C2

FIELD: oil and gas production.

SUBSTANCE: drilling fluid containing, wt %, clay 2.0-5.0, stabilizing reagent 0.5-1.0, polyglycol 1.0-3.0, sodium polyacrylate inhibiting additive (KOLPAN) 3.0-5.0, and water (to 100%) additionally contains lubricating additive (Sonbur-1101) 0.5-1.0, and surfactant (PKD-515) 0.5-1.0, said lubricating additive being product of condensation of monoethanolamine and crude tall oils mixed with kerosene, monoethanolamine, and oxale. Drilling fluid may further contain acid-soluble carbonate heaver in amount 45.0-50.0%.

EFFECT: enhanced inhibitory properties of drilling fluid.

2 cl, 3 tbl

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RU 2 242 492 C2

Authors

Fatkhutdinov I.Kh.

Andreson B.A.

Bochkarev G.P.

Chetvertneva I.A.

Babushkin A.B.

Dates

2004-12-20—Published

2003-01-29—Filed