ZJ50 Land Drilling Rig API Standard 5000m Oilfield Land Drilling Rig for Oil 1. The power adopts the 3-machine or 4-machine linkage form of diesel engine hydraulic torque converter or coupling positive carriage transmission; 2. The winch drum is slotted; the main brake adopts hydraulic disc brake, and the auxiliary brake adopts electromagnetic eddy current brake; 3. At the same time, it is equipped with auxiliary lifting device; pneumatic clutch is used to shift gears; 4. The