Welding Spiral Drill Pipes

• Customization: Available
• Certification: ISO 9001:2015
• Manufacturing Process: Friction Welding
• Material: Alloy Steel
• Transport Package: Wooden Box
• Specification: 78mm~1400mm
• Trademark: ROCK BIT
• Origin: Xi′an

Product Description

[Application scope]
Welded wide fin spiral drill pipe is mainly used for the construction of gas drainage holes in soft and outburst coal seams (f <0.5), and can also be used for drilling holes in hard and complete coal and rock formations. Both the medium-pressure air drilling process and the high-pressure water drilling process can be used. The large-diameter drill pipe can be used in the sieve tube completion process, and the high-pressure sealed drill pipe can be used in the hydraulic coal cutting process.

Not recommended for the drilling of the following coal seams: soft coal seams with dynamic tendency; coal (rock) seams with nodules and gangue layers; coal seams with many small structures. The medium-pressure rotary drilling process should not be used in water-bearing coal (rock) layers.

[Technical features]
The drill rod body is welded by friction welding process, the overall mechanical performance of the drill rod is good, and the service life is long;
The spiral fin of the drill pipe is continuous and the powder mixing ability is strong;
The thread strength of the drill pipe joint is high, and the anti-sticking performance is good;
The drill pipe can be unscrewed directly by the drilling rig, with high drilling efficiency and low labor intensity of workers.

[Technical specification]

Specification(mm)	Name	Steel grade	Drill rod length (mm)	Number of wings	Diameter (mm)	Adapted rig torque (N·m)	Adapted drill specifications (mm)
							Preferred	Optional
Φ63.5/50	Φ63.5/50 Wide wing spiral drill pipe	R780	1000,1500, Can be customized according to requirements	Double head	Φ16	≤1200	Φ75		Φ85
Φ73/63.5	Φ73/63.5 Wide wing spiral drill pipe				Φ20	≤3200	Φ94		Φ113
	Φ73/63.5 High torsion wide wing spiral drill pipe				Φ20	≤4000	Φ94		Φ113
	Φ73/63.5-35 Large diameter wide fin spiral drill pipe				Φ35	≤1900	Φ94		Φ103
	Φ73/63.5 High-pressure sealed high-torsion spiral drill pipe				Φ20	≤4000	Φ94		Φ113
Φ89/73	Φ89/73 Wide wing spiral drill pipe				Φ22	≤6000	Φ113		Φ133
	Φ89/73-41 Large diameter wide fin spiral drill pipe				Φ41	≤4000	Φ103		Φ120