FIELD: mechanics.
SUBSTANCE: invention relates to hoists for oil well repair. The device and method disclosed by the invention, provides for minimiszing cases of drum clutch slipping in the oil well repair plants. Sensor (10) measures the rate of motor or power transmission rotation at the first clutch locking. If movement amount exceeds the allowable level, an alarm is actuated warning the operator about plant malfunctions. In addition, the device includes drum movement sensor (8).
EFFECT: improved reliability of device and ensured safety of performed works.
20 cl, 5 dwg
