摘要
在理论和实验研究的基础上,设计了几种用于牙轮钻头的自激振荡脉冲喷嘴,在常压下进行了射流脉冲压力测试和冲蚀天然红砂岩的实验。实验结果表明,所设计的风琴管自激脉冲喷嘴和亥姆霍兹振荡腔脉冲喷嘴具有很强的脉冲效果,其冲蚀岩石能力大大高于普通锥形喷嘴,其中风琴管自激脉冲喷嘴的脉冲效果和破岩能力最强。实验还表明,自激振荡脉冲喷嘴射流存在最优喷距,最优喷距的大小为喷嘴出口直径的7～14倍。自激振荡脉冲喷嘴可直接应用在钻头上,能提高钻井速度,降低钻井成本。
A number of self-excited resonant pulse jet nozzles for deep hole bits were designed on the basis of theoretical analysis and experimental results.The jet pressure pulsation and rock erosion ability were tested.The experimental results showed that the pressure pulsation and rock erosion with self-resonating organ-pipe nozzles and Helmholtz resonator nozzle were more effective than conical nozzle.The optimum jet distance for jet pressure pulsation was about 7-14 times of nozzle exit diameter.This study shows that self-resonant pulse jet nozzles can be directly used in deep-hole bits to improve drilling action and reduce drilling cost.
出处
《石油大学学报（自然科学版）》
CSCD
1991年第3期36-43,共8页
Journal of the University of Petroleum,China(Edition of Natural Science)
关键词
钻头
喷嘴
自励
射流
试验
Drill bit
Jet nozzle
Self excitation
Resonance pulse jet
