Weatherford/lamb, Inc.

Shell Research Limited

Michael Jahn

Bernd-Georg Pietras

Karsten Heidecke

A torque sub for use with a top drive is disclosed. A method of connecting threaded tubular members for use in a wellbore includes operating a top drive. The top drive rotates a first threaded tubular member relative to a second threaded tubular member. The method further includes measuring a torque exerted on the first tubular member by the top drive. The torque is measured using a torque shaft rotationally coupled to the top drive and the first tubular. The torque shaft has a strain gage disposed thereon. The method further includes wirelessly transmitting the measured torque from the torque shaft to a stationary interface; measuring rotation of the first tubular member; compensating the rotation measurement by subtracting a deflection of the top drive and/or the first tubular member; determining acceptability of the threaded connection; and stopping rotation of the first threaded member when the threaded connection is complete or if the threaded connection is unacceptable.

Torque sub for use with top drive

An apparatus for amorphous bonding of tubulars (,) comprises a double skin jacket (,) which can be placed around said tubulars (,) which skins define a sealed inner fluid space (,) which contains shield gas and a heating element (,) and a sealed outer fluid space (,) surrounding the inner fluid space (,) to reduce the risk of explosion during the amorphous bonding process.

Growing community of inventors

Hambuehren, Germany

Michael Jahn