Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1985-04-18
1986-10-28
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 5716, B25B 1350
Patent
active
046191593
ABSTRACT:
A wrenching unit for makeup or breakout of pipe sections to be used in an oil well casing. Each section is provided at one end with a coupling sleeve. Instead of a complex arrangement of backup tongs known from prior art, adapted to prevent rotation of the pipe section during of the makeup or breakout of the pipe joint, the backup tong assembly is suspended, preferably by a pair of tension springs, from a supporting frame section. The suspension thus allows the desired "floating" during the operation of the backup tong in radial or transverse direction and also longitudinally of the pipe, while achieving a significant simplification of the overall structure.
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Schellin Eric P.
Smith James G.
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