The invention discloses a
well drilling method and device through hydraulic power and disc spring
coupling driving and
axial vibration. By means of the method and device, axial
impact vibration can be uniformly applied to a
drill bit or a
pipe column in the welling drilling process. According to the technical scheme, the device is mainly composed of a body, a pulse generating device and an
axial vibration device; the pulse generating device is composed of a guiding object, an
impeller seat, impellers and a vibration
nozzle; the
axial vibration device is composed of a pressure stressed face, a
piston portion, a central rod and a disc spring portion; the
piston portion is composed of a
piston bush, an oil seal and a piston; the disc spring portion is composed of a disc spring upper pressing sleeve, a disc spring adjusting sleeve, a disc spring protecting sleeve, a disc spring set, a disc spring core bar and a disc spring seat. Compared with other
well drilling tools, by means of the
well drilling method and device, stable and uniform axial vibration can be generated, and
frictional resistance generated by 'pressure supporting' in a horizontal well is lowered; when the device is installed between a
drill collar and a
drill bit, stable and uniform
axial force can be provided for the
drill bit, and well drilling efficiency is improved.