Dynamics of the oscillatory system of the near-bit slurry grinder

Abstract

Abstract The article proposes a near-bit device for vibrodynamic grinding of sludge in a horizontal section of a well – a near-bit sludge shredder, its advantages are given. Theoretical studies of the dynamics of the near-bit sludge grinder oscillatory system depending on the main geometric design parameters are presented. Based on the solution of the mathematical model of the operation of the oscillatory system of the slurry grinder, the law of the relative rotation of the drum-mesh and its angular velocity of rotation relative to the shaft of the turbodrill (bottom of the drilling tool) is established. According to the results of solving the equation of motion of the working elements near-bit slurry grinder, the dependence of the amplitude of the angular velocity of the relative vibrational rotation of the drum on the stiffness of the springs and on the moment of inertia of the drum is established.