The invention discloses an ultrahigh-pressure swirling
abrasive water jet drilling
machine comprising an oil cylinder supporting seat and a
drill rod supporting seat which are fixed on a supporting platform. A cylinder body of a propelling oil cylinder is hinged to the oil cylinder supporting seat while a
piston rod of the same is connected with a connecting block, the connecting block is connected with a rotary oil cylinder shell, an output shaft of a rotary oil cylinder is connected with the rear end of a universal
drill rod, the front end of the universal
drill rod is connected with the rear end of a
drill bit and arranged in a mounting hole of the drill rod supporting seat, one end of a self-contraction-release high-pressure hose is connected with an outlet of an ultrahigh-pressure
abrasive water jet generation
system, the other end of the self-contraction-release high-pressure hose is connected with a hydraulic joint, the output shaft of the rotary oil cylinder, the universal drill rod and the
drill bit are provided with inner runners which are mutually communicated, and the hydraulic joint is communicated with a
nozzle on the
drill bit through the inner runners. The ultrahigh-pressure swirling
abrasive water jet drilling
machine is driven in a fully hydraulic manner and is simple and compact in structure, the propelling oil cylinder and the rotary oil cylinder are small in size and high in power, high-pressure water sealing is simple and reliable, and drilling
cutting of rock high in Protodikonov's
hardness coefficient can be realized by aid of ultrahigh-pressure abrasive jet.