Bucking Unit

Continuously rotate 360° bucking unit is a special machine widely used in oil fields and industrial enterprises for assembling and disassembling threaded connections of oil casings and other downhole tools.
Both the master tongs and back-up tongs are clamped by hydraulic cylinders, featuring reliable clamping performance. It can achieve non marking clamping, ultra-short distance clamping, and eccentric clamping.
The master tongs can continuously rotate 360° for any number of turns. The back-up tongs are equipped with a left-right movement device.
The hydraulic control device provides power for the active drive. The motor drives pump. High-pressure oil passes through the multi-way valve, which is used to control the forward rotation (reverse rotation), clamping (loosening) of the master tongs, the clamping(loosening) and left-right movement of the back-up tongs respectively.
There are three pressure-regulating handwheels on the control panel for easy pressure adjustment. It can also be controlled by an electric remote control handle and is equipped with PLC.
Equipped with an automatic torque control system: After setting the torque value, the sensor under the back-up tongs measures the signal. After computer processing, it automatically generates curves of turns-torque, time-torque, and rotation speed-time. When the torque reaches the set value during make-up, the relief valve automatically unloads, and the equipment stops rotating. The make-up and break-out torque can be measured. The interface can be freely switched between Chinese and English, and the units can be freely switched between kilonewton-meters and foot-pounds.
It has the function of automatic deceleration when the torque approaches the set value.
Our bucking units are non-standard, custom-built products. The clamping diameter range, maximum torque and equipment configuration can all be tailored to your requirements.

Device Config

        

   
JIANGSU SHENLIDA MACHINERY MANUFACTURE CO., LTD.'s bucking unit was featured on China Central Television on January 3, 2016 (CNOOC)

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