St 450 Deep Underground Water Borehole Crawler Drilling Rig
St 450 Crawler Mounted Drill Rig Introduction
It is powered by Yuchai 92 kW six cylinder engine, with a lifting
force of 24 tons, a tower stroke of 6.78 meters and a Liko rotary
motor. High leg travel, easy to get on and off. Steel crawler
chassis, drill size 6.4 * 2.1 * 2.6.The water well drill rig the
drilling diameter is 140-305mm and the drilling depth can reach to
180 meters, which can meet most of the farming or construction
water well requirement, besides, a Small size, light weight,
flexible movement, convenient transportation, etc
St 450 Crawler Mounted Drill Rig Technical Data
Drilling Rig | No. | ST 450 |
Max drilling depth | M | 450 |
Drilling diameter | mm | 105-325 |
Air pressure | Mpa | 1.2-3.5 |
Air consumption | m3 /min | 16-55 |
Drill pipe length | m | 6 |
Drill pipe diameter | mm | 89/102 |
Axial pressure | T | 4 |
Lifting force | T | 22 |
Fast lifting speed | m/min | 29 |
Fast feeding speed | m/min | 56 |
Max rotary torque | Nm | 8000/4000 |
Max rotary speed | r/min | 75/150 |
Big auxiliary winch lifting force | T | - |
Small auxiliary winch lifting force | T | 1.5 |
Jacks stroke | m | 1.6 |
Drilling efficiency | m/h | 10-35 |
Driving speed | Km/h | 2.5 |
Uphill angle | slope | 21° |
Weight of drilling rig | T | 9.8 |
Dimension | m | 6.2*1.85*2.55 |
Working condition | Unconsolidated formation and bedrock |
Drilling methods | DTH hammer or mud drilling |
Matched DTH hammer | Medium and high air pressure series |
St 450 Crawler Mounted Drill Rig Advantages:
1.Four independently operated large bore hydraulic jack cylinders,
and the main engine can rise and fall automatically through
hydraulic drive; Users can choose high outriggers according to
their own needs, and the lifting height can reach 1.5m. It can
simply complete loading and unloading, and completely solve the
troubles of user equipment transfer.
2. The four leg cylinders can be controlled separately to
facilitate the adjustment of the vertical angle between the
borehole and the ground during drilling, and ensure the stability
of the whole machine during drilling.
3. The two-stage air filter intake design ensures the normal
service life of diesel engine and air compressor under harsh
construction conditions.
4. The main shaft of the power head realizes six gear rotation and
stepless adjustable propulsion speed, which can meet the drilling
needs of various complex strata such as soil layer and rock layer,
so that the drill has a very wide range of applicability.
5. Centralized control hydraulic console for easy operation. Two
sets of four pumps are designed to facilitate maintenance and
reduce maintenance cost.
6. This series of drilling rig adopts excavator crawler chassis,
with strong off-road performance and convenient transfer.
7. The newly designed drill pipe hoist makes the loading and
unloading of drill pipe faster and lighter.
8. (optional) it is equipped with arc welding generator to
facilitate on-site welding maintenance and provide night
construction lighting
Drilling Operation Technology
① Proper casing shall be put into the hole to avoid hole collapse.
② When the drilling tool is lowered into the hole, first use
low-pressure slow rotation to sweep the hole to the bottom. When
the resistance of the drill bit in the hole is small, it can be
turned into normal drilling. If the resistance in the hole is
large, it cannot be forced to open the high speed.
③ During normal drilling, the drilling parameters shall not be
changed arbitrarily, and the drilling tools shall not be lifted to
prevent the core from being blocked.
④ When the core is found to be blocked, the drilling tool can be
lifted appropriately. If the treatment is ineffective, the drilling
tool should be lifted immediately.
⑤ If the formation is loose, the particle size of sand and gravel
is very small, and it is difficult to coring, the pump volume
should be reduced.
⑥ If the drilling speed of sand and gravel suddenly accelerates, it
may be to drill into the sand layer or the gravel layer with small
particle size. It is not necessary to change the drilling
parameters, but the pump volume should be reduced as much as
possible.
⑦ In order to ensure that the core is drilled into thin sand and
mud layers, it is best to drill more than 10 cm into the pebble
layer after drilling. If the sand layer is thick, when one round of
drilling cannot be penetrated, the pump should be stopped at the
end of the round to dry drilling for more than 10 cm and then lift
the drill to prevent the core from falling off.
⑧ Carefully operate during drilling, and often observe whether the
water supply system is unblocked and whether the water pump
operates normally. When there is no slurry return in the hole,
slurry breaking shall be prevented. In case of sudden increase in
pump pressure, immediately lift the drill for inspection to prevent
burning.
⑨ When drilling and sampling in important hole sections, the drill
rod should be slowly lifted and screwed down to prevent the core
from falling off. When withdrawing the core, the drill bit should
be removed and then the core should be gently poured out.
FAQ St 450 Crawler Mounted Drill Rig
1. Are you manufacturer or trade company?
We are a direct professional factory
2. What about the Minimum order quantity?
The MOQ is 1 set.
3. Could your company offer customize service to customers ?
Yes, we offer customize service.
4. What is your terms of payment?
Trade Assurance, T/T, Credit Card.
5. What is your terms of delivery?
EXW, FOB, CFR, CIF.
