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2 203 391

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IPC

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Application

2001114181/03, 2001-05-23

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Start date

2001-05-23

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Actual filing date

2001-05-23

(45)

Published

2003-04-27

(72)

Inventor

Zinov'Ev I.V.Belenko S.V.Varjagov S.A.Korshunov V.N.Mashkov V.A.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Nauchno-Issledovatel'Skij Proektnyj Institut Prirodnykh Gazov" Otkrytogo Aktsionernogo Obshchestva

FACILITY TO CLOSE AXIAL CONDUIT OF OIL WELL TUBING Russian patent published in 2003 - IPC

Abstract RU 2203391 C2

FIELD: oil and gas industry. SUBSTANCE: facility is intended to close axial conduit of oil well tubing under packer and to insulate pool from space of pipes. Facility to close axial conduit of oil well tubing has body housing cock in the form of sectors coupled by laminated spring with bearing ring. Internal surface of body has cylindrical bores in upper and lower parts and travel limiter. Collet chuck is also installed in body. Heads of chuck enter upper cylindrical bore, tabs being coupled by ring. Sectors of cock are positioned inside lower cylindrical bore. Bearing ring is made fast to ring of collet chuck and is mounted for joint axial movement and interaction with pusher and contact by sectors of cock with internal wall of casing string. EFFECT: prevented unauthorized capture of tool and migration of fluid in well shaft. 5 dwg

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RU 2 203 391 C2

Authors

Zinov'Ev I.V.

Belenko S.V.

Varjagov S.A.

Korshunov V.N.

Mashkov V.A.

Dates

2003-04-27—Published

2001-05-23—Filed

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