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在深井和超深井钻井中，由于“转盘钻配合牙轮钻头”限制了钻头转速的提高。1997年在青海油田冷科1井三个井段进行了“螺杆钻具配合高效钻头”提高钻井效率的试验研究。第1次在3727．40～3751．87m，进尺24．47m，机械钻这0．87m／h，钻速比牙轮钻头提高20．83％；第2次在3756．77～3898．83m，进尺142．06m，机械钻速1．27m／h，比牙轮钻头进尺提高近2倍，钻速提高75．83％；第3次在4200．26～4305．45m，进尺105．19m，机械钻速0．74m／h，钻速比牙轮钻头提高60．87％。试验结果表明，使用“螺杆钻具配合高效钻头”不仅能提高深部井段的机械钻这，而且如果钻头、地层和螺杆钻具三者匹配合适，其它参数选用得当的话，提高钻速还有很大潜力。
In deep and ultra-deep well drilling, the increase in bit speed is limited by “turntable drilling with roller cone bits.” In 1997, Qinghai Oilfield Cold Key 1 well three wells were carried out “screw drill with high efficiency drill” to improve the drilling efficiency of the pilot study. The first time was 3727.40 ~ 3751.87m, the footage was 24.47m, the mechanical drill was 0.87m / h, the drilling speed was increased by 20.83% than the roller bit, the second was 3756.77 ~ 3898.83m, The footage was 142.06m and the penetration rate was 1.27m / h, which was nearly two times higher than that of roller cone drill bits and the drilling speed increased by 75.83%. The third was at 4200.26 ~ 4305.45m and the footage was 105.19m. Drill speed 0.74m / h, drill bit faster than the roller bit increased 60.87%. The test results show that using “screw drill with high-efficiency drill bit” can not only improve the mechanical drilling in the deep well section, but also if the drill bit, the stratum and the screw drill match properly and the other parameters are properly selected, Great potential.