High Speed St 350 Meters Deep Crawler Mounted Drill Rig For Business
ST 350 Crawler Mounted Drill Rig Introduction
It is mainly used to drilling wells,irrigation wells,ground source heating pump wells and boreholes ,especially for mountain and rock formation well projects,the drilling depth is 350 meters ,hole-diameter is 105-350 mm ,lift power is 24MT.
ST 350 Crawler Mounted Drill Rig Tech Details
| Drilling depth | 350m |
| Dia.hole | φ105-305mm |
| Advance Length one time | 6.6m |
| Working pressure | 1.7-3.3MPa |
| Air consumption | 17-35m³/min |
| Length of rod | 1.5m,2m,3m, (6m can be choosed) |
| Dia. Of rod | φ89,φ102,φ114 |
| Lifting power | 24T |
| Rotation torque | 6200-8500 N.m |
| Rotation Speed | 55-115r/min |
| Diesel Engine | Yuchai |
| Engine Power | 85Kw/2200rpm |
| Travelling speed | 0-2.5 Km/h |
| Climb capacity | 30° |
| Weight | 9000kgs |
| Dimension | 5500x1900x2780mm |
| Application | Complicated geological conditions: Rock, Mud, Sand etc. |
| Drilling Way | Top drive hydraulic rotary and propulsion, Dth Drilling or Mud Pump Driling |
| DTH Hammer | 4",5",6",8",10" Drill hammer or CIR110, 130, 150,170 |
ST 350 Crawler Mounted Drill Rig Advantages
With hydraulic technology,supporting high torque hydraulic motor rotation and large bore hydraulic cylinder push, the multi cylinder engine of famous factory provides power for the hydraulic system, two stage air filter, air compressor air intake design
Working Attentions During Drilling Work
First of all, the temperature of hydraulic oil is too high. According to hydraulic theory and maintenance experience in recent years, the main reason for the high temperature of hydraulic oil is too fast heat generation and too slow heat dissipation. The oil inlet pipeline and hydraulic oil tank of the hydraulic pump are not sealed tightly, the oil inlet filter element is blocked, the hydraulic system pipeline is not unblocked, and the internal leakage of the hydraulic pump will cause a large amount of heat to be generated in the hydraulic oil, so that the temperature of the hydraulic oil will rise rapidly due to excessive heat generation.
Cause and judgment of drill pipe sliding down
Fault cause:
The drill pipe is fixed on the main winch drum through the steel wire rope, and the drill pipe can be raised or lowered accordingly when the drum is wound or released with the steel wire rope. The power of the drum comes from the main winch motor that has been decelerated for many times. Its stop is realized by the brake directly installed on the reducer. During the lifting or lowering of the drill pipe, if the operating handle is returned to the middle position and the drill pipe cannot stop quickly, there may be three reasons: first, the brake lag; Second, the two hydraulic locks at the outlet of the motor end fail, and the motor cannot stop rotating immediately under the effect of the torque of the wire rope; Three reasons are easy to be ignored. All engineering drilling rigs have a drill pipe release function. The function is that the solenoid valve 3 provides release brake signal oil, and then the solenoid valve 2 connects the oil inlet and outlet of the main winch motor through two oil pipes, so as to ensure that the drill bit can always contact the working face and have a certain pressure during drilling. Under other working conditions, the solenoid valve 2 will disconnect the two oil pipes leading to the inlet and outlet of the motor. If the disconnection is not timely, the above-mentioned fault phenomenon will occur.
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