DEVICE FOR DISCONNECTING DRILL-STRING-CASING ANNULUS OF INJECTION WELLS Russian patent published in 1995 - IPC

Abstract RU 2026957 C1

FIELD: oil producing industry. SUBSTANCE: device for disconnecting drill string-casing annulus consists of body 1 connected with string 2. Body has supports 3 and 4 with sealing member 5 installed between them. Installed between support 4 and member 5 is spring. EFFECT: higher reliability of disconnection of drill string-casing annulus. 2 dwg

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RU 2 026 957 C1

Authors

Kolotov A.V.

Shupletsov V.A.

Abaturov S.V.

Dates

1995-01-20—Published

1992-08-19—Filed