Hydraulic oscillator with energy-gathering shock-absorbing function

Abstract

The invention relates to a novel hydraulic oscillator with energy gathering and damping functions. The novel hydraulic oscillator is fixedly mounted in the position close to a drill bit and comprises a damping assembly, a transmission assembly and an oscillating assembly. The oscillating assembly is mounted at the front end of the transmission assembly. The damping assembly is mounted at the rear end of the transmission assembly. Vibration generated on an upper tool by the oscillator during operating is absorbed through multiple stages of vibration absorption rings; bit pressure and torque are transmitted through a disk spring and splines, and the disk spring and the splines are connected in series. When flowing through a flow guide pipe, drilling fluid flows into a pressure chamber through flow guide holes in the circumference of the flow guide pipe and then flows back to a central flow channel, pressure pulsation of the drilling fluid fluctuates, and the oscillating assembly generates an oscillating effect. The novel hydraulic oscillator with the energy gathering and damping functions can generate the oscillating frequency of a certain range to reduce friction drag borne by a drilling tool in the rock breaking process of the drill bit, automatically absorb vibration and reduce the influence of the oscillating assembly on the upper drilling tool during operating, so that the well drilling efficiency is improved.

Description

technical field [0001] The invention belongs to the field of petroleum and natural gas drilling engineering and relates to a novel downhole drilling tool, in particular to a hydraulic oscillator with the function of energy gathering and damping. Background technique [0002] At present, the demand for oil and gas at home and abroad is increasing, and many oil and gas reserves that are difficult to exploit are gradually entering the development stage to increase oil and gas production and meet people's growing energy needs. At the same time, with the continuous development of oil drilling technology, a large number of new downhole tools are constantly being developed and used, making the drilling of unconventional wells possible, especially the emergence of complex wells such as extended reach wells, multi-lateral horizontal wells, and highly deviated wells. Oil and gas that were previously unavailable for production are gradually being developed, and the number of wells with...

AI Technical Summary

Problems solved by technology

[0004] In order to explore and solve the problems described in the background technology that the friction between the drill string and the well wall is relatively large, the transmission efficiency of the weight on bit is low, and downhole accidents are prone to occur during the drilling process, the present invention provides a Functional hydraulic oscillator, the hydraulic oscillator of the present invention utilizes the multi-stage vibration-absorbing ring to absorb the vibration generated by the upper drilling tool when the oscillator is working, so as to ensure that the normal operation of the upper drilling tool is not affected. When the drilling fluid flows through the guide tube, the drilling fluid enters the pressure chamber through the inlet guide hole on the circumference of the guide tube, and then flows back to the central flow channel through the outlet guide hole. When the hydraulic pressure fluctuates, the oscillating assembly produces an oscillating effect, thereby improving drilling efficiency

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