The locking pliers are equipment used for automatically attaching and detaching the couplings on the drill pipe.
They are mainly divided into two types: pneumatic locking pliers and hydraulic locking pliers.
1. Pneumatic Locking Pliers The main parameters of the SSW-40 pneumatic locking plier: Size range: 3-½" to 9 ½" (89-241 mm); Rotation speed (for 5" drill pipe): 120 RPM; Torque (for 5" pipe): 1100 ftlbs (1490 Nm); Air pressure: 90-120 psi (6,2-8,6 Bar)
Precautions for using pneumatic locking pliers: 1) The cylinder, valves, and air circuits are safe and reliable, with flexible operation and no leakage.
2) Replace the transmission gears when they are damaged.
3) The diameter of the driving and pressure rollers does not wear more than 3.175 mm.
4) The lifting rod is flexible and easy to adjust.
5) Regularly add oil to the lubrication parts.
6) Maintain a certain amount of gear oil in the gearbox.
7) If there is slippage, noise, low pressure, or air leakage, check or repair it in time.
2. Hydraulic Pliers Q10Y-M type hydraulic pliers are mainly composed of travel gearbox, reduction device, plier head, air control system, and hydraulic system. Usage Notes
⑴ The size of the jaw plate should match the size of the drill pipe joint.
⑵ When moving the large clamp to the wellhead, it is strictly prohibited to fully close the air valve at once to prevent the clamp from moving rapidly towards the inlet and causing impact.
⑶ Before the male coupling has completely come out of the female coupling and the large clamp has not released the drill pipe, it is not allowed to lift the drill pipe.
⑷ When the large clamp is not in use, all liquid and air valves should be returned to the zero position, the one-way valves should be closed, the hydraulic pump should be stopped, and the large clamp airway valve should be closed.
⑸ According to the disassembly and assembly of the coupling, determine the position of the positioning handle of the upper and lower clamps. When changing positions, all the gaps on the clamp head must be aligned before operation; otherwise, the mechanism will malfunction.
