The present disclosure provides a winch overload protection system, a workover system, and a method for operating a workover system. The winch overload protection system, in one embodiment, includes an overload detection unit operable to detect when a load on a winch of a workover system exceeds a safety load limit. The winch overload protection system, in this embodiment, further includes an overload control unit configured to receive an overload signal from the overload detection unit, and in response thereto release a brake on the winch.

A single-cable drum-type conveying installation with a cable drum driven by a winch drive, includes a cable-monitoring device, a conveying device, which hangs freely on a conveying cable, and an intermediate harness connecting the conveying cable to the conveying device. The cable-monitoring device includes a load-measuring pin, as a constituent part of the intermediate harness, and also a transmission path along which a measuring signal received from the load-measuring pin is transmitted to an evaluation device. The evaluation device is designed for evaluating the measuring signal such that, in the case of the measuring signal jumping by an extent which exceeds a certain amount, a malfunction is detected.

A single-cable drum-type conveying installation with a cable drum driven by a winch drive, includes a cable-monitoring device, a conveying device, which hangs freely on a conveying cable, and an intermediate harness connecting the conveying cable to the conveying device. The cable-monitoring device includes a load-measuring pin, as a constituent part of the intermediate harness, and also a transmission path along which a measuring signal received from the load-measuring pin is transmitted to an evaluation device. The evaluation device is designed for evaluating the measuring signal such that, in the case of the measuring signal jumping by an extent which exceeds a certain amount, a malfunction is detected.

The present disclosure relates to a control unit for controlling operation of a hoist in a load slip condition. The hoist may include a motor coupled to a winding drum for lifting and lowering a load. The control unit may include a processor and a memory communicatively coupled to the processor. The memory may store processor executable instructions, which, on execution, cause the processor to operate the hoist for selectively lifting and lowering a load between a first position and a second position upon detecting a load slip condition. The processor may operate the hoist based on parameters pertaining to transport of the load. The control unit may be configured to reciprocate the load in a load slip condition to prevent overheating and failure of a motor, thereby preventing a fall of the load in a work area.

The present disclosure relates to a control unit for controlling operation of a hoist in a load slip condition. The hoist may include a motor coupled to a winding drum for lifting and lowering a load. The control unit may include a processor and a memory communicatively coupled to the processor. The memory may store processor executable instructions, which, on execution, cause the processor to operate the hoist for selectively lifting and lowering a load between a first position and a second position upon detecting a load slip condition. The processor may operate the hoist based on parameters pertaining to transport of the load. The control unit may be configured to reciprocate the load in a load slip condition to prevent overheating and failure of a motor, thereby preventing a fall of the load in a work area.

A cable break-away device for a rescue hoist connects a cable to a cable drum of the rescue hoist. The cable break-away device provides overload protection to the rescue hoist by disconnecting the cable from the cable drum when the loads transmitted through cable become excessive. The cable break-away device is configured to fracture, releasing the cable from the cable drum, when the loads experienced by the cable break-away device exceed a predetermined failure set point. As such, the cable break-away device forms a mechanical fuse connecting the cable to the cable drum.

A cable break-away device for a rescue hoist connects a cable to a cable drum of the rescue hoist. The cable break-away device provides overload protection to the rescue hoist by disconnecting the cable from the cable drum when the loads transmitted through cable become excessive. The cable break-away device is configured to fracture, releasing the cable from the cable drum, when the loads experienced by the cable break-away device exceed a predetermined failure set point. As such, the cable break-away device forms a mechanical fuse connecting the cable to the cable drum.

This disclosure relates to an endless cable winch including a drive unit having an engine configured to generate a torque. The endless cable winch further including an output unit connected to the drive unit, the output unit including a power transmission assembly coupled to the drive unit, the power transmission assembly configured to apply a driving force to a cable. The endless cable winch further including a lifting force limiting device configured to stop the drive unit as soon a predetermined driving force is exceeded. In doing so, this system is also transferable to winches with multiple engines. The engine and the output unit can be movable relative to one another, and the lifting force limiting device can be configured to stop the drive unit based on the relative movement of the drive unit and the engine.

This disclosure relates to an endless cable winch including a drive unit having an engine configured to generate a torque. The endless cable winch further including an output unit connected to the drive unit, the output unit including a power transmission assembly coupled to the drive unit, the power transmission assembly configured to apply a driving force to a cable. The endless cable winch further including a lifting force limiting device configured to stop the drive unit as soon a predetermined driving force is exceeded. In doing so, this system is also transferable to winches with multiple engines. The engine and the output unit can be movable relative to one another, and the lifting force limiting device can be configured to stop the drive unit based on the relative movement of the drive unit and the engine.

A fairlead for use with a winch is disclosed. The fairlead is made up of a first and second roller, a motor, a sensor, and a controller. The rollers are adapted to aid in spooling or unspooling a line. The motor drives at least the first roller. The sensor determines whether a winch drum is spooling or unspooling a line. The controller is connected to the motor and communicates with the sensor. The sensor determines whether the winch drum is spooling or unspooling the line. The controller is configured to direct the motor so that the rollers assist in unspooling or spooling the line in coordination with the winch drum. In some embodiments, the fairlead is integrated into the winch.