地浸砂岩型铀矿弹塑性致密泥岩钻头的研究与应用

针对北方地浸砂岩型铀矿超过400m钻孔钻进中弹塑性致密泥岩钻进效率低的问题，研究试验了钻头，提高了钻进效率，总结了操作技术。用φ104mm中八角阶梯肋骨钻头钻进较软弹塑性致密的光滑的红褐色、浅绿色“打滑”泥岩；用φ104mm中八角阶梯肋骨钻头钻进较软弹塑性致密的灰色致密泥岩；用φ104mm交错式圆片状复合片钻头钻进脆性较大的黑灰色弹塑性致密泥岩；用φ104mm交错式圆片状复合片钻头钻进灰白色脆性较大的弹塑性致密泥岩；用φ104mm双环式齿形复合片钻头钻进弹塑性致密硬泥岩。

Research and Application of Bits for Drilling elastic-plastic dense mudstone in In-Situ Leaching Sandstone Style Uranium Deposits

In view of the low drilling efficiency of elastic-plastic dense mudstone in more than 400 meters of holes in northsitu leaching sandstone-type uranium deposits ,research test was made on bit to improve the situation. φ104 mm octagonal step rib bit was chosen for soft elastic-plastic dense smooth reddish brown and light green mudstone; φ104 mm octagonal step rib bit was chosen for soft elastic-plastic dense gray mudstone; φ104 mm staggered round flake PDC bit was chosen for brittle-plastic high dense black gray mudstone; φ104 mm staggered round flake PDC bit was chosen for brittle-plastic high dense white mudstone; and φ104 mm tooth shape PDC bit was chosen for hard-plastic high dense mudstone.