Product Name:  hole enlargement drill rod

Product Model:

Place of Origin: Shanxi, China

Product Description

The Triangular helical groove high-toughness hole enlargement drill rod is directly milled on the drill pipe body. The helical grooves are primarily designed to reduce resistance during the insertion and withdrawal of the reaming drill pipe. In cases where the drill encounters issues such as getting stuck or buried, rotating and pulling the drill pipe causes the edges of the helical grooves to crush coal chunks or debris, aiding in resolving these issues. Additionally, the grooves assist in cutting removal, effectively addressing problems related to stuck or buried drills.

Features

Integral Structure: Enhances the torsional and bending strength of the hole enlargement drill pipe.

Thickened End Joints: Ensures adequate wall thickness at the threaded ends for increased durability.

High Hardness and Strength Blades: Compared with spiral drill pipes, the blades offer higher hardness, strength, and wear resistance.

Continuous Debris Removal: Unlike triangular drill pipes, the helical grooves continuously transport coal slag from within the borehole to the outside.

Broad Blade Design: Minimizes the scraping of the borehole walls by the blades, ensuring borehole stability.

Applications

Primarily used for large diameter directional drilling and water exploration drilling operations underground in coal mines. It is also suitable for near-horizontal directional engineering holes in surface or drift applications.

Technical Specifications

Specification Outer Diameter (mm) Helix Direction Length Range (mm) Steel Grade Joint Process

Φ73 73 Right-hand Spiral 1500 - 3000 S135 Friction Welding

Φ89 89 Right-hand Spiral 1500 - 3000 S135 Friction Welding