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Special-shaped multi-edge grooved drill pipe-geological drill pipe-triangular drill pipe-beneficial mine
Release time:
2021-03-16
Author:
Source:
The main body circular grooved drill pipe, rib drill pipe and special-shaped multi-edge grooved drill pipe all have cooling function, especially the latter has directional righting function (not easy to collapse holes, good hole forming quality), taking into account multiple slag discharge principles, and will become the main drilling tool for gas extraction deep hole drilling. Compared with the current coal mine gas drainage using smooth round drill pipe and ordinary triangular drill pipe, because the rod body has no groove structure, protruding coal seam, especially soft coal seam, should not use hydraulic slag drilling. Dry drilling lacks cooling function under blockage (cinder cannot move along the axial direction). Comprehensive comparison, special-shaped multi-edge grooved drill pipe, with hole protection, pressure relief, support
The main body circular grooved drill pipe, rib drill pipe and special-shaped multi-edge grooved drill pipe all have cooling function, especially the latter has directional righting function (not easy to collapse holes, good hole forming quality), taking into account multiple slag discharge principles, and will become the main drilling tool for gas extraction deep hole drilling.
Compared with the current coal mine gas drainage using smooth round drill pipe and ordinary triangular drill pipe, because the rod body has no groove structure, protruding coal seam, especially soft coal seam, should not use hydraulic slag drilling. Dry drilling lacks cooling function under blockage (cinder cannot move along the axial direction).
Comprehensive comparison, special-shaped multi-edge grooved drill pipe, with hole protection, pressure relief, righting, cooling four effects.
Key words:
Drill pipe, cooling, function, shaped, gas, coal seam, righting, especially, triangular
