Three-ribbed drill pipe - triangular drill pipe

Product features:

(1) the drill pipe body is welded by friction welding process, which has good overall mechanical properties and long service life

(2) the triangular section design of the drill pipe increases the annular gap between the drill pipe and the hole wall to make the discharge of powder more unobvious

(3) the drill pipe joint is designed with double roof structure, and the torsional resistance is increased by about 30% compared with the conventional joint

(4) the thread strength of the drill pipe joint is high, and the anti-adhesion performance is good

(5) the drill pipe can be directly unscrewed through the drilling machine, with high drilling efficiency and low labor intensity

(6) spiral grooves with large lead are distributed on the circumference of the high-strength three-edged spiral drill pipe, and the ability of stirring and discharging powder is strong

(7) the integral long-diameter three-ribbed spiral drill pipe can be drilled into the design hole depth through the inner hole of the drill pipe into the corresponding specifications of the screen pipe, to achieve the "drill in place, pipe to the end", so as to effectively improve the depth of the screen pipe under the protection hole of soft outburst coal seam, avoid the collapse of the hole after the lifting drill, and ensure the gas drainage efficiency.

Scope of application:

Three-ribbed drill pipe is mainly used for the construction of gas drainage hole in soft outburst coal seam (f<0.5), and usually adopts the wind pressure air drilling technology. It is not recommended to be used in soft coal seams with dynamic tendency, coal (rock) layers rich in nodules and gangue, and coal seams with many small structures. The wind pressure rotary drilling technology is not suitable for drilling in water-bearing coal (rock) layer.

Product features:

(1) the drill pipe body is welded by friction welding process, which has good overall mechanical properties and long service life

(2) the triangular section design of the drill pipe increases the annular gap between the drill pipe and the hole wall to make the discharge of powder more unobvious

(3) the drill pipe joint is designed with double roof structure, and the torsional resistance is increased by about 30% compared with the conventional joint

(4) the thread strength of the drill pipe joint is high, and the anti-adhesion performance is good

(5) the drill pipe can be directly unscrewed through the drilling machine, with high drilling efficiency and low labor intensity

(6) spiral grooves with large lead are distributed on the circumference of the high-strength three-edged spiral drill pipe, and the ability of stirring and discharging powder is strong

(7) the integral long-diameter three-ribbed spiral drill pipe can be drilled into the design hole depth through the inner hole of the drill pipe into the corresponding specifications of the screen pipe, to achieve the "drill in place, pipe to the end", so as to effectively improve the depth of the screen pipe under the protection hole of soft outburst coal seam, avoid the collapse of the hole after the lifting drill, and ensure the gas drainage efficiency.

Scope of application:

Three-ribbed drill pipe is mainly used for the construction of gas drainage hole in soft outburst coal seam (f<0.5), and usually adopts the wind pressure air drilling technology. It is not recommended to be used in soft coal seams with dynamic tendency, coal (rock) layers rich in nodules and gangue, and coal seams with many small structures. The wind pressure rotary drilling technology is not suitable for drilling in water-bearing coal (rock) layer.