1.The rig is applicable to 2000-3200m drilling depth for exploring oil well with 127mm drilling pipe, and 2500-4000m drilling depth with 114mm drilling pipe. 2.Utilize diesel engines + torque converters as rig power , has high power and efficiency 3.The rig utilizes integrated chain box which is well-sealed and easy to install 4.Grooved drawwork drum with air clutch to shift speed; Disc brake is applied as main hydraulic and auxiliary brake is eddy current brake. 5.Major components of rig are conform to api specifications and allowed to use api monogram Api