自激振荡脉冲射流提高PDC钻头机械钻速实践

Application of Self-excited Oscillation Pulsed Jet in Improving the Penetration Rate of PDC Drill Bits

摘要:

利用自激振荡脉冲射流原理，设计了脉冲射流喷嘴，应用于PDC石油钻头中，经过不同地域、不同地层、不同直径的实践应用表明，新型自激振荡脉冲射流PDC石油钻头与普通PDC钻头相比，机械钻速提高10%～30%；钻头寿命大幅度提高；破碎岩屑颗粒粒径增大2～4倍，扩大了勘探油井PDC钻头使用范围；有效地防止了钻头“泥包”等。

Abstract:

The pulsation-jet nozzle was designed according to the principle of self-excited oscillation pulsed jet, and was applied in PDC oil drilling head. The application in different area, formation and diameter showed that compared with ordinary PDC bit, penetration rate of self-excited oscillation pulsed jet PDC oil drilling head increased 10%-30%, the service life and application range was largely prolonged and enlarged, and the size of rock debris was increased by 2-4 times without any auxiliary equipment.