CHURNING MECHANISM Russian patent published in 2002 - IPC

Abstract RU 2183251 C2

FIELD: oil and gas industry, release of pipe string in process of drilling or overhaul of hole. SUBSTANCE: churning mechanism comprises telescopic rod-striker installed in body. Rod-striker transmits torque to body. Threaded fingered bushing is positioned in ring recess. Rod-striker has male multistart thread matching thread of bushing. Fixing member secures operation of tripping unit to uncouple rod-striker from body without disruption of circulation of flushing fluid. With this in mind valve or hollow weight is dropped in advance. EFFECT: enhanced reliability of churning mechanism. 5 dwg

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RU 2 183 251 C2

Authors

Shlakhter Il'Ja Semenovich

Kucherovskij V.M.

Dates

2002-06-10—Published

2000-05-15—Filed