Rotation Torque Rubber Crawler Mounted Drilling Rig 200 Meters Depth

ST 200 Fast Speed Steel Crawler Large Pneumatic Water Well Drilling Rig Equipment

ST 200  Pneumatic Drilling Rig Description

ST 200 drilling rig mainly used to drilling wells,irrigation wells,ground source heating pump wells and boreholes for other purposes,especially for mountain and rock formation well projects.This drilling machine is small size, light weight, good disassembly, good layout, flexible and reliable operation, easy maintenance.

ST 200 Pneumatic Drilling Rig Tech Details

ST 200 Pneumatic Drilling Rig Features

a. the machine is equipped with crawler chassis device,easy to move with fast speed.
b hydraulic oil pressure feed device,improve drilling defficiency.
c. pressure gauge display the condition of the bottom of the drill hole.
d drill mast controlled by hydraulic cylinder,improve the efficiency
diesel engine adopt the electric starter,to reduce the labor itensity

ST 200 Pneumatic Drilling Rig Drilling Process

1. The drilling unit must first drill holes, take samples and draw the drilling profile structure diagram (histogram).

2. After the well is drilled and the pipe is laid, the backfilling amount of filler shall be 1.8-2.0 m3, and it must be ensured that the outside of the well pipe wall is more than 70 mm. The filter material is siliceous sandy pebble without impurities. It is better to mix according to the pebble particle size (20-40mm). During filling, materials shall be fed layer by layer manually. It is strictly prohibited to backfill filter materials mechanically and soil into the well. Gravel filling method: generally, circulating water or still water is used for gravel filling. If the filling quantity and height of filter material are greatly different from the plan, find out the reasons, deal with them properly, and record the filling results.

3. After well completion, the well pipe shall be vertical and not inclined.

4. The polyethylene plastic pipe wall of the well pipe is 8mm thick. The well pipe adopts a drilling filter. The drilling hole is 18-20mm, and the drilling rate is not less than 25%. The well pipe shall be overlapped and the filter screen shall be fixed. Screw joint is adopted for well pipe lapping and drilling φ 8mm hole, mounting φ 10mm screw. The mesh of the filter screen is about 25 mesh, and the filter screen is wrapped in 2 layers.

What aspects should we pay attention to in the drilling process ?

Bit plays a very important role in the drilling of water well drilling rig, but the quality of a bit directly affects the efficiency and quality of water well drilling. Therefore, in the selection process, we should pay attention to the selection and use of lower bit. When we are operating the drill bit, we must pay attention to several aspects in order to better production and operation.

1. After the drilling structure of the drill bit of the water well drilling rig is drilled, the central drilling tool needs to be replaced in time. First, the hole bottom needs to be cleaned, and then the residue at the hole bottom needs to be blown away. After the drill bit stops rotating, the drilling tool in the water well drilling rig can be lifted up slowly. When the lifting force is just enough to lift the drilling tool, it is the most appropriate.

2. During the drilling process, the drill bit of the water well drilling rig shall be summarized. It is also necessary to carefully observe the follow-up situation of the casing, timely understand the specific situation in the hole, and keep the hole clean when necessary. Moreover, the drill bit in the water well drilling rig shall not be pulled out by force during the drilling process.

3. Sometimes there will be more residual rock slag at the bottom of the hole of the water well drilling rig, and the rotating part of the eccentric bit will be stuck by the rock slag, which will affect its retraction and production. At this time, it is necessary to transport air pressure, clean the hole again, make the DTH hammer work in a short time, and then lift the central drilling tool again.