DEVICE FOR GRIPPING AND RECOVERY OF CASING Russian patent published in 1994 - IPC

Abstract RU 2015297 C1

FIELD: equipment for recovery of casing. SUBSTANCE: device is made in form of closed articulated-link chain embracing casing with slip pairs, self-wedging when chain with slips are moved by power mechanism relative to casing surface. Application of articulated-link chain provides for uniform load over all side surface of casing and prevents its deformation and damage. In this case, ratio of casing use is increased by five times. EFFECT: higher efficiency. 2 dwg

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RU 2 015 297 C1

Authors

Mel'Nikov V.I.

Gridnev Ju.N.

Korotkikh V.B.

Dates

1994-06-30—Published

1991-01-22—Filed