The Qianshan Heavy Industry QS220 dual-casing drilling rig is a crawler-type fully hydraulic drilling rig specifically designed for complex geological formations. Its core advantages include simultaneous dual-casing drilling, high adaptability, intelligent control, and environmental performance.

Simultaneous Dual-Casing Drilling Technology

Outer Casing Wall Protection: The outer casing provides real-time support to the borehole wall, preventing collapse and reducing the collapse rate in pebble layers by 90%.

Inner Casing Slag Removal: High-speed rotation of the inner drill rod (≥300 rpm) combined with mud circulation efficiently removes drill cuttings, reducing the risk of stuck drill.

High Adaptability to Geological Conditions

Complex Working Conditions: Suitable for high-risk formations such as pebble layers, fractured rock masses, and water-rich sand layers, with hard rock drilling speeds reaching 5-8 meters per hour.

Extreme Environments: Supports construction in extremely cold regions (-30℃) and karst formations, with a hydraulic system stability of 98%. 

Intelligent and Efficient Construction

Precise Control: The angle control system ensures that the borehole insertion angle error is ≤1°～3°, and the borehole inclination error is ≤0.5%.

Rapid Relocation: The dual-track independent suspension design adapts to 60° steep slopes and muddy terrain, improving relocation efficiency by 50%.