Torque calibrating system

摘要

Generally, the subject matter disclosed herein relates to torque calibrating systems. A torque calibrating system includes a torque arm having a first end and a second end, a stem positioned proximate the first end of the torque arm, the stem adapted to be removably and operatively coupled to a power tong, and a load cell adapted to be positioned proximate the second end of the torque arm.

主权项

1. A method of calibrating a hydraulically powered power tong, comprising:
arranging a load cell to receive an external load from the power tong, the external load corresponding to a torque generated by the power tong, wherein arranging the load cell comprises:
mounting the load cell/in a holder positioned proximate a first end of a torque arm, the torque arm further comprising a torque arm stem positioned proximate a second end that is opposite of the first end; andinserting the torque arm stem into a central opening of the power tong; driving the power tong to apply torque to the torque arm; monitoring an output of the load cell until a first load corresponding to a first predetermined torque value is registered at the load cell; determining a first hydraulic pressure supplied to the power tong when the first load corresponding to the first predetermined torque value is registered at the load cell; adjusting driving of the power tong to increase the torque applied by the power tong to the torque arm; monitoring an output of the load cell until a second load corresponding to a second predetermined torque value is registered at the load cell; and determining a second hydraulic pressure supplied to the power tong when the second load corresponding to the second predetermined torque value is registered at the load cell.