The Bear Cat Twin-Stop is the premier safety device that sets the brake to stop the drawworks motion in both directions. It is the only system that provides positive, reliable, automatic protection against equipment damage by the drawworks. It engages the drawwork’s brake automatically, in either direction, at pre-set points. As a result, it protects both the rotary floor and the crown block.

The Twin-Stop also incorporates a brake set valve which sets the brake and disengages the clutches immediately on command, regardless of the position of the traveling block. A check valve is used to prevent the brakes from releasing due to loss of rig air supply while in this mode.

The brake override valve, operated from the drilling console, permits the traveling block to move beyond the preset stops for special operations such as resetting the system or making a connection.