DEVICE FOR CASING CEMENTING Russian patent published in 1994 - IPC

Abstract RU 2017937 C1

FIELD: well cementing. SUBSTANCE: device has additional projection made on internal surface of its body in its lower part. Bushing is spring-loaded relative to additional projection. EFFECT: higher efficiency. 3 dwg

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RU 2 017 937 C1

Authors

Kurtov V.D.

Fedoruk I.M.

Gajovyj M.S.

Lishchuk V.Ju.

Jurchenko G.A.

Dates

1994-08-15—Published

1990-05-07—Filed