POWERED PIPE TONGS Russian patent published in 1997 - IPC

Abstract RU 2086384 C1

FIELD: petroleum drilling; making up and breaking out pipes and parts of turbodrills in repair shops. SUBSTANCE: the tongs have frame 1 bearing drive 4 and reduction gear 5. Positioned on the output shaft of the reduction gear are cams interconnected by a gear ring provided with a brake. The reduction gear has two coaxial output shafts each of them being provided with some eccentric cams. The shafts are interconnected by a differential transmission and a mechanism designed for returning the shafts into initial position. EFFECT: enhanced efficiency. 4 dwg

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RU 2 086 384 C1

Authors

Lysjakov V.G.

Aseev E.G.

Dates

1997-08-10—Published

1995-11-10—Filed