PACKER Russian patent published in 1994 - IPC

Abstract RU 2021486 C1

FIELD: well cementing. SUBSTANCE: packer is provided with check valve located in body under lower sealing member. Sealing member inner surfaces have longitudinal recesses for their communication through check valve with body hollow. Sealing members are reinforced with metal rods and lower part of lower sealing member has protective casing. EFFECT: higher operate reliability of packer due to reduced friction forces between sealing members during installation of packer. 6 dwg

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RU 2 021 486 C1

Authors

Beljaev V.I.

Kuz'Minov A.S.

Novikov A.D.

Dates

1994-10-15—Published

1992-05-08—Filed