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

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.