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2 014 433

(13)

C1

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IPC

(21) (22)

Application

4876336/03, 1990-10-23

(22)

Actual filing date

1990-10-23

(45)

Published

1994-06-15

(72)

Inventor

Kendin S.N.

(73)

Holder

Institut

METHOD OF ISOLATION OF LOST CIRCULATION FORMATIONS Russian patent published in 1994 - IPC

Abstract RU 2014433 C1

FIELD: mining industry. SUBSTANCE: densities of drive and plugging fluids are chosen based on condition of hydrostatic pressure and lost circulation onset pressure equilibrium. Substitution of flushing fluid with drive one allows to create downhole circulation and therefore, to monitor isolation job procedure. EFFECT: control of borehole hydrostatic pressure variations provided. 6 dwg

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RU 2 014 433 C1

Authors

Kendin S.N.

Dates

1994-06-15—Published

1990-10-23—Filed

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