In trenchless engineering, the core parameters of HDD directly determine construction efficiency and project success. Core parameters of HDD such as torque, pull-back force, and drill pipe diameter, though seemingly abstract, are closely related to construction results. This article breaks down the mechanism of these parameters to help you judge equipment adaptability through the core parameters of HDD and avoid selection mistakes.

1. Torque: The "Crushing Force" Indicator in the Core Parameters of HDD

Torque is a key indicator in the core parameters of HDD for measuring the crushing capacity of the power head. Hard rock geology requires high-torque equipment (such as Hengwang HWF460 with a torque of 19,000 N·m), while soft soil geology can choose low-torque models (HWF50 is 2,235 N·m).

Impact: Insufficient torque will cause stuck drilling, and exceeding the equipment's rated value by more than 5% will cause the power head to overheat. Following the "geology-torque matching principle" in the core parameters of HDD can reduce downtime by 40%.

2. Pull-Back Force: The "Traction Core" in the Core Parameters of HDD

Pull-back force determines the ability to lay pipelines and is an important part of the core parameters of HDD. The 135 kN pull-back force of HWF135 is suitable for φ200-700 mm pipelines, and the 460 kN of HWF460 can handle large-diameter φ1200 mm pipelines.

Note: The pull-back force needs to retain a 20% redundancy (e.g., select 120 kN equipment for a 100 kN designed project), which is the "safety redundancy specification" in the core parameters of HDD.

3. Drill Pipe Diameter: The "Conduction Bridge" in the Core Parameters of HDD

Drill pipe diameter directly affects drilling stability: φ42 mm drill pipes (HWF50) are suitable for short-distance and small-diameter construction, while φ83 mm (HWF460 ) is suitable for long-distance and heavy-load operations.

Correlation: For every 10 mm increase in drill pipe diameter, the pull-back force can increase by 15%, but it needs to match the torque parameter — this is the "synergistic effect" in the core parameters of HDD.

4. Rotational Speed and Pressure: The "Efficiency Drivers" in the Core Parameters of HDD

The rotational speed of the power head (e.g., HWF135 reaches 230 r/min) affects drilling speed, and the mud pump pressure (HWF460 up to 80 Bar) controls the stability of the hole wall.

Balance: High rotational speed with low pressure is suitable for soft soil, and low rotational speed with high pressure is used for hard rock, which conforms to the "dynamic adjustment logic" in the core parameters of HDD.

Hengwang Group's Trenchless HDD: A Benchmark for Parameter Optimization

Hengwang HWF series strictly calibrates the core parameters of HDD to adapt to various scenarios:

Parameter Coverage: From HWF50 (torque 2,235 N·m) to HWF460 (19,000 N·m), with drill pipe diameters of 42-89 mm and pull-back forces of 50-460 kN, meeting different engineering needs

Technical Guarantee: The hydraulic system efficiency is increased by 15%-20%, parameter stability has passed CE certification, and operation training includes a "parameter matching guide"

Leave your project's geological and pipe diameter information to obtain a customized plan based on the core parameters of HDD , and the Hengwang team will respond within 24 hours! Only by understanding the core parameters of HDD can you choose the right equipment and double the efficiency of trenchless construction.