Patent ID: 9726567
Date: 2017-08-08
CPC Classifications: G01L

Claim:
1. A torque calibrating system, comprising: an open-head power tong comprising a drive ring, said drive ring having an axis of rotation; a load cell assembly adapted to be positioned in a throat of said open-head power tong, wherein said drive ring is adapted to impose a load on said load cell assembly when said open-head power tong is actuated, said imposed load corresponding to a torque generated by said open-head power tong about said axis of rotation; and a hydraulic system adapted to actuate said open-head power tong, said hydraulic system comprising a hydraulic motor that is adapted to drive said drive ring and a pressure gage that is adapted to measure a hydraulic pressure in said hydraulic system when said open-head power tong is actuated, said measured hydraulic pressure corresponding to said imposed load and to said generated torque.