FIELD: oil, gas producing and geological prospection industries; designed for round-trip operations with pipe string in well under pressure, under emergency situations, or in well servicing. SUBSTANCE: plant has hydraulic system, power hydraulic cylinder containing coaxially located hollow rods, one of which is movable, and the other, fixed. Piston of movable hollow rod embraces fixed rod and forms rod and head ends of power hydraulic cylinder. Each slip cathead has two rows of oppositely directed slips spring-loaded by spiral springs. Sealing unit is built in lower fixed slip cathead. Upper movable slip cathead is installed on upper end of fixed rod. Power hydraulic cylinder and slip catheads are connected by threaded joints. EFFECT: simplified design and higher operate reliability of plant. 1 dwg
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|---|---|---|---|
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