Patent ID: 8770272

Claim:
A well servicing system, comprising: a frame adapted to mount to a pipe handling system, the pipe handling system comprising: a hanger coupled with the frame and adapted to guide a load coupled to a cable towards a wellhead, the load exerting at least a portion of a tensile force on the cable; and a winch including a drum and a brake, the brake adapted to control rotational motion of the drum to spool a portion of the cable over the drum and set the drum to substantially prevent rotational motion of the drum; a hydraulic piston-cylinder that is coupled with the frame and is coupled between a first sheave in a pair of sheaves that further comprises a second sheave, the piston adapted to stroke into or out of the cylinder when the tensile force exceeds a desired load when the drum is set to substantially prevent rotational motion to spool the cable from the drum; and a valve fluidly coupled to the hydraulic piston-cylinder to relieve fluid from the cylinder based on the tensile force exceeding the desired load.