Oscillator for realizing vortex-induced vibration by using screw and porous channel

Abstract

The invention relates to an oscillator using a screw and a porous flow passage to realize vortex-induced vibration. The oscillator is composed of a screw assembly and an oscillating short section. The front end of the oscillation short section is connected with an impact connector. The rear end is connected with the screw assembly. The hydraulic energy of drilling fluid is converted into the mechanical energy of a rotor through the screw assembly. A flow passage rotation switch is connected with the screw rotor through a thread. The flow passage of the drilling fluid is changed, so that the fluid flows into the oscillating short section in periodically changes. The oscillating short section adjusts the pressure periodical change of the drilling fluid, so that the oscillating short section produces axial impact of a certain frequency. Axial vibration is applied on a drill bit during the rotary rock breaking process of the drill bit. The rock breaking efficiency of the drill bit is improved. According to the invention, the oscillator which uses the screw to change the hydraulic pressure uses the periodical change of the drilling fluid flow passage to produce the axial impact of a certain frequency; the structure is simple; the oscillator is free of electronic components and rubber components; the adaptability to the formation is strong; and the drilling efficiency is effectively improved.

Description

technical field [0001] The invention relates to an oscillator used in the fields of petroleum drilling, geological drilling, cementing and coiled tubing to realize vortex-induced vibration by using a screw rod and a porous flow channel. Background technique [0002] The exploitation of new oil and gas wells makes drilling engineering more complex. In order to meet the new drilling conditions of deep wells and ultra-deep wells and the needs of new oil and gas resources such as coalbed methane, shale gas, and ocean gas, corresponding new drilling methods and tools are constantly being developed. develop. In the development process of these new drilling technologies, increasing the mechanical speed, reducing the borehole wall friction, and increasing the borehole target diameter are important basic problems that need to be solved. Among the methods to solve these problems, downhole tools that work mechanically use drilling fluid to realize energy conversion and generate vibrat...

AI Technical Summary

Problems solved by technology

[0003] The stratum working environment faced by drilling engineering is more complicated, and the drilling depth continues to increase, and the hardness and strength of the rock will increase significantly under the confining pressure of the bottom layer, resulting in low rock breaking efficiency of the drill bit

When the drill bit is drilling deep wells, the drilling speed is generally slow and the drilling cost is high. The key to improving the drilling speed is how to improve the rock breaking efficiency of the drill bit.

Images