75mm Hole OEM ST 300 Borewell Drilling Machine

Product Details:

Place of Origin:	China
Brand Name:	ShiTan
Certification:	ISO
Model Number:	ST-300

Payment & Shipping Terms:

Minimum Order Quantity:	1 set
Packaging Details:	standard export packing
Delivery Time:	7-10 days
Payment Terms:	T/T, Western Union
Supply Ability:	5000 sets per year

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Detailed Product Description

Product Name:	OEM High Drilling Rig ST 300 Drilling Equipment, Pneumatic Borewell Machine	Drilling Depths:	300 Meters
Place Of Origin:	China (Mainland)	Model Numbe(m):	ST-300
Certification:	ISO,CE,SGS,	Open Hole Caliber:	75m'm
Warranty:	1 Year	Material:	Steel
Condition:	New	OEM:	Customized Drilling Rig
Color:	Yellow ,Red,Blue	Tech Support:	Acceptable,video Support
Highlight:	75mm borewell drilling machine , oem borewell drilling machine , 300m borewell machine

75mm Hole OEM ST 300 Borewell Drilling Machine

Product Specifications

Attribute	Value
Product Name	OEM High Drilling Rig ST 300 Drilling Equipment, Pneumatic Borewell Machine
Drilling Depths	300 Meters
Place Of Origin	China (Mainland)
Model Number	ST-300
Certification	ISO, CE, SGS
Open Hole Caliber	75mm
Warranty	1 year
Material	Steel
Condition	New
OEM	Customized Drilling Rig
Color	Yellow, Red, Blue
Tech Support	Acceptable, video support

Product Overview

The ST 300 drilling rig is primarily designed for industrial and civil drilling applications, including geothermal drilling. This pneumatic borewell machine features a compact structure, rapid advancing capability, excellent mobility, and wide application range.

Technical Specifications

Model	ST 300
Dimension	5900×2000×2850mm
The hole diameter	140-325mm
Drilling depth	300m
One-time advance length	3m
Walking speed	2.5KM/H
Climbing angles	30°
Power	84KW
Using air pressure	1.7-3.3MPA
Air consumption	17-35 cubic meter/min
Drill pipe length	2 meter or 3 meter
Drill pipe diameter	102mm, 89mm
Rig lifting force	20T
Swing speed	55-115rpm
Swing torque	6200-8500N.m

Key Features

Automatic telescopic rig supported by two high-strength oil cylinders with hydraulic valve control for safe, efficient operation
Rubber crawler chassis reduces weight, noise, vibration, and fuel consumption while being road-friendly
Hydraulic high outriggers for rig leveling, truck loading/unloading, and auxiliary support
24V electric start diesel engine reduces operator fatigue, especially in cold conditions
Includes BW-160 mud pump with large flow/pressure and easy maintenance
Optional hydraulic pipe screwing machine (75-168mm) available to boost efficiency

Operation Principle

The water well drilling rig operates using reverse circulation. The pump circulates fluid from the sedimentation tank to the well bottom through the annular gap. The rotary table drives the drill pipe and bit for drilling while the mud pump's suction creates negative pressure to remove debris through the drill pipe's inner cavity, completing the reverse circulation process.

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