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2 162 511

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IPC

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Application

99110638/03, 1999-05-17

(24)

Start date

1999-05-17

(22)

Actual filing date

1999-05-17

(45)

Published

2001-01-27

(72)

Inventor

Gabdullin R.G.Abdrakhimov T.Z.Strakhov D.V.Osnos V.B.Salakhova Z.R.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Tatarskij Nauchno-Issledovatel'Skij I Proektnyj Institut Nefti

DEVICE FOR SEPARATION OF DRILL STRING-CASING ANNULUS OF WELL EQUIPPED WITH CEMENTED LINER Russian patent published in 2001 - IPC

Abstract RU 2162511 C1

FIELD: oil and gas producing industry; applicable in sealing of drill string-casing annulus. SUBSTANCE: device includes a hollow with seat and plugging plunger with plug. Part of its external surface is made conical for body seat. Plugging plunger has fastening threads on its end and is located inside body. Body and plugging plunger have centering ribs on their one end. EFFECT: protection of casing string wall from effect of high pressure and aggressive media, and in treatment of bottom-hole formation zone with deep differential pressure. 3 dwg

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RU 2 162 511 C1

Authors

Gabdullin R.G.

Abdrakhimov T.Z.

Strakhov D.V.

Osnos V.B.

Salakhova Z.R.

Dates

2001-01-27—Published

1999-05-17—Filed