Application of grooving drill pipe

2020-01-06 14:42:44

 DOWNLOAD

In order to give full play to the advantages of the grooving drill pipe applied in the drilling of protruding coal seam, the influence of the width, depth and pitch of the spiral groove of the grooving drill pipe on the effect of slag removal is analyzed. Establish 50 刻槽鉆桿煤層鉆孔三維模型，對(duì)不同參數(shù)的刻槽鉆桿在鉆孔內(nèi)的排渣情況進(jìn)行數(shù)值模擬,。 The results show that the width of spiral groove is 12 mm, the depth is 1.1 mm, the pitch is 76 mm, and the slag discharge effect is the best. Through the industrial test of outburst coal seam drilling, the average drilling depth is increased by 36.2%, the drilling efficiency is increased by 41.5%, and the surface temperature difference of groove drill pipe is small.