| 摘要 |
A method for measuring applied torque of a oilfield tubular torque wrench, the oilfield torque wrench being operable to torque a tubular about an axis of rotation and the oilfield torque wrench including a lower tong including a recess through which the axis of rotation passes during operation; an upper tong including a recess, the upper tong being mounted above the lower tong with the recess of the upper tong positioned above the recess of the lower tong so that the axis of rotation passes therethrough; pipe gripping dies in the recesses of the upper tong and the lower tong; a swivel bearing between the upper tong and the lower tong permitting the upper tong and the lower tong to swivel relative to each other while the recesses remain positioned with the axis of rotation passing therethrough; a drive system connected between the upper tong and the lower tong, the drive system being operable to generate a force vector to drive the upper tong and lower tong to swivel on the swivel bearing, the method comprising: determining at least one of (i) the actual radius measurement measured perpendicularly to the force vector and between the force vector and the axis of rotation of the tubular, and (ii) the actual force measurement of that force being applied to torque the connection; and calculating torque based on the at least one measurement. A torque wrench includes systems for measuring actual radius and/or actual force. |
