Composite impact drilling tool

Abstract

The invention discloses a composite impact drilling tool. The drilling tool is mainly composed of an impact short joint, a shell, an anti-falling block, a nut, a radial spring, a seal ring, an impact hammer, an axial spring, an impact shaft, a thrust bearing, a fixed shaft, a turbine stator, a turbine rotor, a stator pressing cap, a rotor pressing cap and a conversion joint. The composite impact drilling tool is characterized in that a collision bearing block is arranged at the top end of the impact short joint, and an inclined face used for bearing the collision of the impact hammer is arranged on the collision bearing block; an impact block is arranged at the bottom end of the impact hammer, an inclined face used for colliding the collision bearing block of the impact short joint is arranged on the impact block, a through hole is formed in the top end of the impact hammer, and a rectangular spline groove is formed in the through hole; a rectangular spline is arranged on the impact shaft, and a disc-shaped step is arranged at the lower end of the impact shaft; and a step is arranged in the middle of the shell, and the axial spring is arranged between the lower end face of the step of the shell and the upper end face of the impact hammer. Circumferential torque pulses and axial force pulses in the axial direction can be generated by the composite impact drilling tool at the same time, the drilling tool can be used on a drilling bit to assist rock breaking, and therefore the drilling efficiency is improved.

Description

technical field [0001] The invention relates to a drilling tool, in particular to a composite percussion drilling tool aimed at increasing drilling speed in hard formations, and belongs to the technical field of mechanical engineering or drilling engineering. Background technique [0002] The oil and gas resources in the formation are based on a certain drilling process, and the drilling system is used to form a wellbore in the formation. The drilling system includes surface equipment such as derrick and top drive, and downhole equipment such as drill pipe and drill bit. The wellhead energy is input into the drill string system by the continuously rotating turntable, and the energy is transmitted from the wellhead to the drill bit at the bottom of the well through the drill string. The drill bit directly acts on the formation under the weight of the lower drilling tool and the torque of the drill string, scraping the rock and forming a well The cuttings broken by the drill b...

AI Technical Summary

Problems solved by technology

However, as the well depth increases, the pumping capacity of the wellhead equipment limits the application of these tools in deep wells

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