Abstract
Efficiency analysis of sonic drilling of wells and the choice of rational operational modes of drill bit vibration loading to increase the rate of penetration was carried out. The rational operational modes are studied on the basis of an assessment of the power of the drilling process with a cavitation hydrovibrator. This paper presents an approach to calculating the mechanical oscillatory power of a drill bit. The approach uses a developed mathematical model of the dynamics of cavitation hydraulic vibrator with drill string. The mathematical model describes the interaction of drill string longitudinal vibrations and drill mud hydraulic oscillations at regime of the cavitation self-oscillations of the drilling fluid flow in the vibrator. The mechanical oscillatory power has been determined for the specific drill string. Rational operation modes of the cavitation hydrovibrator for efficient conversion of a stationary flow of drill fluid into drill bit mechanical oscillatory power and ensuring a high rate of penetration are evaluated.
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