The invention relates to a hydraulic power depressurization acceleration tool for a
deep drilling well bottom, which mainly consists of a
solid-phase collector, a
solid draft tube, a
turbine accelerator, a rotational sealer, a power connector, a
rotational flow separator, a support rod and a flow guider. The tool mainly aims at solves the problems that at the bottom of a deep well, the
drilling fluid density is high, the chiphold down effect is serious, and the mechanical drilling rate is low. The concrete implementation mode of the hydraulic power depressurization acceleration tool for the
deep drilling well bottom is as follows: high-pressure high-speed
drilling fluid is pumped underground from the ground surface, the
drilling fluid lashes the
turbine accelerator to supply rotational power for the
rotational flow separator, after the drilling fluid is separated by the
rotational flow separator, the
solid phase in the drilling fluid enters an annular space between the drilling rod and a stratum, and is brought back to the ground surface by the drilling fluid which moves upwards in the annular space, and the drilling fluid after separation flows downwards to enter a
drill bit through the interior of a rotational flow rotor. By the hydraulic power depressurization acceleration tool, the power problem of tools can be solved, the separation efficiency of solid-phase particles in the drilling fluid is improved, meanwhile, the chiphold down effect at the bottom of the deep well is effectively reduced, the mechanical drilling rate is improved, the
drill bit life is prolonged, and the cost is lowered.