Product Name:the spiral drill rod

Product Model:

Place of Origin: Shanxi, China

.Structural Features

Rod Body Material
High-strength alloy steel pipes (e.g., 27SiMn, R780) are used, with thickened walls and vacuum quenching-tempering processes to enhance fatigue resistance and shear strength, ensuring stable operation under complex geological conditions.

Spiral Blade Design
Single or double spiral blades are welded onto the rod body using pre-stressed winding techniques. The blade angles and pitches are optimized according to drilling requirements to balance slag discharge efficiency and torque transmission.

Connection Methods
Threaded connections (e.g., B19, B22 standards) or square/hexagonal quick couplings are used at the tail end, supporting the connection of multiple drill rods for drilling at varying depths.

Surface Treatment
Copper plating or QPQ salt bath nitrocarburizing treatments improve wear resistance. Some models are equipped with replaceable wear sleeves to extend service life.

II. Working Principles

Drilling Mechanism
The drill rod rotates, driven by the directional drilling rig, with the spiral blades cutting rock formations and pushing drill cuttings toward the hole opening, enabling continuous drilling.

Mud Circulation
The central channel of the spiral drill rod transports drilling mud to cool the drill bit and carry cuttings back to the surface, maintaining hole wall stability.

Torque Transmission
Torque is transmitted through threaded or spline connections from the drilling rig to the drill bit, ensuring efficient rock fragmentation.

III. Applications

Geological Exploration
Used for deep-hole drilling in medium-hard to hard rock formations, such as mineral resource exploration and hydrogeological surveys.

Coal Mining
Suitable for drilling gas drainage holes and water exploration holes in coal seams. Anti-outburst drill rods reduce the risk of coal and gas outbursts.

Pile Foundation Construction
Long spiral drill rods (diameters 400–1000 mm) are used for CFG pile and bored pile construction, offering high drilling efficiency and good hole-forming quality.

Trenchless Engineering
Enables low-disturbance drilling for urban pipeline installation and tunnel pre-support.

IV. Technical Parameters

Specifications

Diameter: Φ32–Φ800 mm

Length: 0.5–6 m (customizable)

Connection types: Threaded/square/hexagonal

Performance Indicators

Tensile strength: ≥850 MPa

Torque capacity: ≥8,500 N·m for 600 mm drill rods

Slag discharge efficiency: Double spiral blades improve efficiency by over 30%

Service life: Wear sleeve design enables up to 2,000 linear meters

Compatible Drill Bits
Choose pick-type drum bits (for hard rock) or double-layer bottom rotary drilling buckets (for silt layers) based on geological conditions.

V. Maintenance Guidelines

Daily Inspection
Check for thread wear, blade deformation, and weld cracks before each use to ensure reliable connections.

Cleaning and Maintenance
Flush the interior of the drill rod with high-pressure water after drilling to prevent mud from clogging the channel.

Lubrication Management
Apply specialized grease to threaded areas to reduce wear and prevent sticking.

Storage Practices
Store horizontally in a dry environment to avoid bending caused by long-term suspension.