Wrenching unit for use in power threading of a sleeve...

Details Wrenching unit for use in power threading of a sleeve... Wrenching unit for use in power threading of a sleeve...

E - Fixed Constructions

21

B

166/68

E21B 17/00 (2006.01) B23P 19/06 (2006.01) E21B 19/16 (2006.01)

Patent

CA 1222206

ABSTRACT OF THE DISCLOSURE 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.

473492

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