| 摘要 |
The present invention is a torquemeter for measuring the torque applied during drilling operations. The torquemeter is of generally flat annular form and adapted to be positioned in the drive train around a Kelly and between the rotary table and the Kelly bushing and to rotate therewith. The torquemeter includes an annular torque link receiving forces from the rotary table whereby torque is transmitted from the rotary table to the torque link. The torque link has a set of bearing areas for receiving azimuthal forces from the Kelly bushing whereby torque is transmitted from the torque link to the Kelly bushing. Each of the bearing regions is mechanically isolated from the remainder of the torque link except for radially oriented bridging beams which support the isolated regions and serve as the sole conduits for transfer of mechanical forces from the isolated region to the remainder of the torque link. Each of the bridging beams has coupled thereto associated strain measuring means responsive to the shear stress in the associated beam, and providing an indication thereof. The torquemeter includes means for transmitting to a stationary control station signals derived from the strain measuring means and indicative of the torque transferred from the rotary table to the Kelly bushing by the torque link.
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