APPARATUS AND DEVICE FOR MINIMIZING SLIPPAGE ON A DRUM CLUTCH

摘要

An apparatus and method for minimizing slippage on the drum clutch (7) of a well service rig (20). A detector (10) senses the motion of the engine or compound (1) when the clutch is initially engaged. If the momentum is above an acceptable level, an alarm sounds, notifying the operator to be smoother with the clutch. A tracking mechanism is disclosed so that a rig supervisor or safety person can critique the operator on the smoothness of the rig operation. The apparatus further includes a pressure detecting means (12) for detecting clutch air pressure, and a drum motion detector (8). If the engine speed is above a predetermined value, then a logic circuit prevents the clutch from engaging.