High-efficiency helical water-through jackrod

Abstract

The invention discloses an efficient water spiral drill pipe which comprises a plurality of drill pipe units. Each drill pipe unit comprises a drill pipe core, a spiral body, a tetragonal rod, a retaining ring, a lateral pin and a spring body which supports the lateral pin for splicing-positioning and connecting two adjacent drill pipe units into one body. The spring body of each drill pipe unit is provide with a cylindrical connector which is nested and clamped in a water and gas vent at the end of the tetragonal rod of the drill pipe unit, a bending knob which is connected with the connector into one body and is clamped in the end groove of the tetragonal rod, and a flat spring which is connected with the connector into one body and is inclined in the water and gas vent of the tetragonal rod; and the tail of the flat spring bends upwards for supporting the bottom end of the lateral pin on the tetragonal rod. The drill pipe has little possibility of blockage, solves the problem that drill pipe is difficult for water and gas passing through, and effectively reduces the occurrence of hole collapse, drill pipe sticking and drill pipe losing, and improves the working environment by reducing coal dust. The drill pipe has the advantages of wide application, high drilling efficiency and reduced drilling cost.

Description

technical field [0001] The invention relates to a tool for drilling holes in coal seams, in particular to a high-efficiency helical water-through drilling rod. Background technique [0002] In the process of coal mine production, in order to prevent coal and gas outburst accidents, it is necessary to drill release holes in the coal seam before tunneling to release the gas in the coal seam to eliminate the stress of the coal seam. The drill pipes used for drilling in existing coal mines are common auger drill pipes. The common auger drill pipes have several drill pipe units that are connected as a whole through insertion and positioning. Each drill pipe unit has a drill pipe core, a spiral body, a square rod, A retaining ring fixed on the square bar, a horizontal pin matched with the retaining ring, and a helical spring (spring body) for limiting support of the horizontal pin. Even if it is changed to a water-passing drill pipe in the form of a helical spring limited to the ...

AI Technical Summary

Problems solved by technology

Even if it is changed to a water-passing drill pipe in the form of a helical spring that supports the horizontal pin in a limited position, the helical spring will block the drill pipe with coal dust, making it difficult to pass water and air through the drill pipe, and the horizontal pin cannot be freely depressed or ejected. , causing the drill pipe to fail and affecting mine production

Furthermore, ordinary auger drill pipes have low drilling efficiency when drilling hard coal, and are prone to hole collapse and drill sticking when drilling soft coal, causing the drill pipe to be lost in the coal seam and increasing the cost of excavation

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