Anti-shaking screw drilling tool

Abstract

The invention discloses an anti-shaking screw drilling tool which comprises a bypass valve assembly, a hydraulic motor assembly, a universal shaft, a transmission shaft assembly and a drill bit, and the bypass valve assembly, the hydraulic motor assembly, the universal shaft, the transmission shaft assembly and the drill bit are connected sequentially; the bypass valve assembly comprises a piston,a spring and a bypass hole; the hydraulic motor assembly comprises a stator and a rotor, the rotor is located in the stator, the rotor and the stator are mutually meshed, and the gear ratio of the stator is larger than that of the rotor by one; the upper end of the universal shaft is connected with the rotor, and the lower end of the universal shaft is connected with a transmission shaft; the transmission shaft assembly comprises an upper transverse bearing, a thrust bearing, a lower transverse bearing and a buffering mechanism, and the buffering mechanism is fixedly arranged between the thrust bearing and the upper transverse bearing and between the thrust bearing and the lower transverse bearing. According to the anti-shaking screw drilling tool, the structure is novel, the conditions of shaking and bit jumping of the screw drilling tool in the drilling process can be effectively reduced, and the service life of the screw drilling tool is prolonged greatly.

Description

technical field [0001] The invention relates to the field of drilling equipment, in particular to an anti-seismic screw drilling tool. Background technique [0002] The screw drilling tool is a volumetric downhole power drilling tool that uses drilling fluid as power and converts fluid pressure energy into mechanical energy. When the mud pumped by the mud pump flows through the bypass valve and enters the motor, a certain pressure difference is formed at the inlet and outlet of the motor, which pushes the rotor to rotate around the axis of the stator, and transmits the speed and torque to the drill bit through the cardan shaft and the transmission shaft , so as to realize the drilling work. [0003] During drilling, the drilling tool and the drill bit are drilled under a large drill pressure and a large torque is output through the drilling tool. During the drilling process, the rock is continuously broken for drilling, and the carbon stone is crushed under pressure. Vibra...

AI Technical Summary

Problems solved by technology

[0003] During drilling, the drilling tool and the drill bit are drilled under a large drill pressure and a large torque is output through the drilling tool. During the drilling process, the rock is continuously broken for drilling, and the carbon stone is crushed under pressure. Vibrations and shocks are generated in an instant, and the performance is particularly prominent in the base layer with high hardness and poor stability, and even the phenomenon of drill jumping occurs, which makes the drill pipe and drill tools resonate, which is extremely destructive to drill tools, drill pipes, drill bits, etc. Large, will greatly affect the service life of the drilling tool

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