Air Compressor Water Well Rotary Drilling Machine For Mountain Rocks Area

Price Negotiable

Price: Negotiation

MOQ: Negotiation

Delivery Time: Within 7-12 days

Brand: ShiTan

Product Description

Air Compressor Water Well Rotary Drilling Machine For Mountain Rocks Area

Overview of ST-350 Pneumatic Drilling Rig

The 350 meter water well drilling rig is a medium-sized drilling equipment specifically developed for underground water wells at depths of 50-350 meters. Its core positioning is to "balance depth and efficiency", which can meet the needs of medium and deep water wells such as centralized water supply in towns and small and medium-sized industrial water use, as well as drilling in some complex formations (such as weathered rocks and thick sand layers). With the characteristics of "strong power, intelligent controllability, stability and durability", it has become the core equipment for scenarios such as water supply for people's livelihoods, industrial production, and mining area assistance.

ST-350 Pneumatic Drilling Rig Parameter:

Drilling Depth	350m
Drilling Hole Diameter	105-305mm
Working wind pressure	1.25-3.5Mpa
Gas consumption	16-55m³/min
Drill pipe length	6m
Drill pipe diameter	89mm
Axial pressure	4T
Lifting force	24T
Lifting speed	20m/min
Fast forward speed	40m-min
Maximum turning torque	8900/NM
Maximum rotation speed	85/170r/min
Lifting force of small auxiliary winch	1.2T
High leg travel	1.35m
Footage efficiency	10-35m/h
Walking speed	2.5km/h
Climbing degree	30
Weight	9T
Overall dimension	5.2×2×2.35米
Adaptive conditions	Loose layer and bedrock
Engine	Yuchai 91KW

I. Core Configuration: Power and Structural Design Adapted for Medium-Deep Hole Drilling

Most 350-meter water well drilling rigs adopt hydraulic drive (a few use high-power electric drive). Their core configuration is optimized around the "torque, impact force, and load capacity required for medium-deep hole drilling" to ensure a balance between depth and efficiency:

1.Power System: Equipped with a 50-120kW diesel engine or electric motor, combined with a high-pressure hydraulic pump, it can output a torque of 1500-3000N·m and an impact force of 20-50kN. It can not only drive drilling tools to rotate and cut through thick sand layers and gravel layers but also break moderately weathered rock (e.g., limestone, sandstone) within a depth of 300 meters through the combined action of "hydraulic impact + rotation", avoiding the problem of "inability to drill in deep holes".
2.Drilling Tools and Hoisting System: Equipped with high-strength geological drill pipes (single length 3-6 meters) with a diameter of Φ89-127mm, which can withstand the axial pressure and torque during deep hole drilling. The hydraulic winch with a lifting capacity of 8-15 tons can quickly lower and lift drill pipes, reducing the auxiliary time for deep hole operations — it only takes 1-2 hours to lift the drill string from a 350-meter depth.
3.Body Structure: Adopts a foldable or split-type frame. After unfolding, the whole machine has strong stability (equipped with 4-6 hydraulic outriggers for leveling, with a horizontal error ≤0.5%), avoiding hole deviation caused by the machine shaking during deep hole drilling. Some models can be equipped with a crawler chassis, adapting to muddy and gentle slope terrain in the field, and have better flexibility in entering the construction site than large deep well drilling rigs.

II. Core Advantages: Accurate Adaptability to Medium-Deep Water Well Scenarios

Compared with small-sized rigs (≤200 meters), the 350-meter water well drilling rig covers a wider depth range; compared with large deep well drilling rigs (≥500 meters), it has higher operating efficiency and lower costs. Its core advantages are reflected in:

1.Drilling Efficiency: For 100-200-meter sand layers, the average daily drilling depth can reach 30-50 meters, and a well can be completed in 3-5 days; for 200-350-meter formations containing moderately weathered rock, with a hydraulic impactor equipped, the average daily drilling depth is 15-25 meters, and drilling can be completed in 10-15 days — which is 40%-60% more efficient than small-sized rigs at the same depth.
2.Depth Compatibility: The drilling depth can be flexibly adjusted. It can be used as a shallow-to-medium well within 200 meters (e.g., centralized water supply wells in rural areas) and can also drill to a full load depth of 350 meters (e.g., production water wells in small industrial parks). It can cover multi-depth needs without replacing equipment, reducing equipment investment costs.