Patent ID: 9551195
Date: 2017-01-24
CPC Classifications: B25B,E21B

Claim:
1. A rig adapted for making up and breaking out tubulars for insertion or withdrawal from a wellbore, the rig comprising: a. a base, a mast on the base, a prime mover adjacent the mast, and a controller connected to the prime mover; b. a hoist mounted to the mast for lowering the tubulars into or from the wellbore; c. a power turning means on the mast for turning the tubulars into or out of the wellbore; d. a hydraulic power supply connected adjacent the mast for operating the power turning means and the hoist; and e. a tong assembly connected to the hydraulic power supply or a self-maintained and contained hydraulic power supply, and connected to the controller for making up and breaking out the tubulars being run into the wellbore, wherein the tong assembly comprises: