High Lifting Capacity Engineering Drilling Rig With Mud Reverse Circulation

GF200C is a crawler-chassis type mud-reverse-circulation drilling rig. It uses high-power impeller pump to pump mud and stone from hole end which can increase the work efficiency a lot. This model is suitable for infrastructure pile of road, bridge, railway, building, and farm water well as well. it can work in soil, sand, gravel layer and soft rock.

truck chassis is DONGFENG brand 4*2 drive.168mm diameter rod is equipped.2 sets of electric motor to drive spindle and pump.Gantry tower up-down is controlled by hydraulic system.

In the pumping reverse circulation drilling, the circulation medium is maintained by the vacuum degree of the pump. The commonly used pump is a sand pump, which requires to be able to discharge rock debris and have a relatively large vacuum degree. In order to allow rock debris to pass smoothly, the free passage in the pump body should be consistent with the inner diameter of the drill pipe. The gap between the blades of sand pump should be large, the effective vacuum degree should not be lower than 8m water column, and the pump body and blades should have better wear resistance. The flow rate of sand pump depends on the inner diameter of drill pipe in the hole, generally 120 ~ 240 m3 / h, with a maximum of 500 m3 / H.