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钢砂钻头双弧对开双水口,经多次试验改进,初步取得效果良好.如曾在某机试用(用了二个此型钻头),在孔深210多公尺的7-8级细砂岩中钻进,使用普通钻头时钻进1小时40分进尺1.4公尺,单位小时进尺0.84公尺;改用双弧对开双水口钻头,在岩石、压力、转速、水量、投砂量相同的条件下,钻进1小时50分进尺2.4公尺,单位小时进尺达到了1.31公尺,与普通水口钻头比较,提高效率56%.其技术规格如图所示;二个水口占钻头底面积1/4-1/3,水口的高度为一长一短,长的为180公厘,短的为一个回次进尺的
Grit drill double arc double opening, after several tests to improve, the initial results are good.If a machine in the trial (with two of this type of drill), the depth of 210 meters deep 7-8 level fine Sandstone drilling, the use of ordinary drill bit into the 1 hour and 40 minutes into the 1.4-meter-long unit of footage into the 0.84 meters; instead of double-arc open double nozzle bit in rock, pressure, speed, water, the same amount of sand Under the conditions of drilling 1 hour and 50 minutes into the 2.4 meters, footage per hour reached 1.31 meters, compared with the ordinary nozzle drill to improve efficiency of 56% of its technical specifications as shown; two nozzles accounted for the bottom area of the drill 1 / 4-1 / 3, the height of the nozzle for a long short, long for 180 mm, short for a sub-footage