1. Adjustment of chuck speed

The speed of the tong head is directly proportional to the oil supply of the oil pump. As long as the fuel supply of the oil pump is changed, the speed of the tong head can be changed. Adjust the oil supply of the oil pump to 2/3. If the rotation speed of the tong head is too high, reduce the flow rate. Otherwise, increase the flow rate.

       2. Adjusting the torque of the tong head

The torque of the tong head is proportional to the oil pressure. The adjustment method is to send the drill pipe power tong to the wellhead, operate the advanced clamping joint, adjust the pressure of the oil tank overflow valve when the tong is not rotating, and confirm it as the system supply pressure. During the supply operation, adjust the relief valve to the specified pressure (i.e. torque) of the system. Attention: Do not open the low gear to adjust the pressure, as the low gear torque is too high and the drill pipe power tong joint may break!

       3. Leveling of drill pipe power tong

Leveling is also a very important issue, as uneven drill pipe power tongs not only slip but also cause damage to the drill pipe power tongs. The drill pipe power tong is hung on the mast using 6/8 '~7/8 "steel wire rope, and the height is adjusted using a 3-ton chain pulley. The tong tail column is fixed on the mast base or mast (not welded). After the pipeline is connected, the conveying tube is connected to the tong tail, and the tong is ventilated to the wellhead (there should be drill pipe at the wellhead for easy adjustment). The height of the drill pipe power tong is adjusted, and the bottom of the drill pipe power tong is kept at a certain distance (40mm) from the upper plane of the elevator . After opening the pliers and entering the drill pipe, observe that the front of the tong head is uneven on both sides of the drill pipe power tong. If uneven, rotate the screw on the suspension rod to adjust the left and right positions of the lifting wire rope to the horizontal. After the left and right sides are basically level, observe whether the two plugs of the upper and lower pliers are connected to the male and female joints of the drill pipe respectively. If there is no connection, it means that the sweet nuts are uneven. By adjusting the suspension rod adjustment screw and adjusting the clamp head, connect the male and female joints to the lower two screw plugs of E.