High-frequency torque oscillator

Abstract

The invention relates to a high-frequency torque oscillator in the field of drilling tools. The oscillator comprises an outer shell, a central shaft, a spring device, a punching hammer, an anvil and aturbine, wherein the central shaft is arranged in the outer shell, the central shaft is axially provided with a central pore channel, the punching hammer is arranged on the central shaft and is in sliding and rotary fit with the central shaft through a guide ball, the spring device is arranged between the upper part of the punching hammer and the outer shell, the anvil is arranged in the position, below the punching hammer, of the outer shell, the lower part the central shaft is also provided with a radial bypass hole, and the turbine is arranged on the position, below the bypass hole, of thecentral shaft. The high-frequency torque oscillator has the characteristics of low pressure reduction and obvious effect, can fully meet the drilling process requirements of complex structure wells of vertical wells, directional wells and horizontal wells in China, and is a novel tool with simple structure, convenient operation, low cost, safety and reliability.

Description

technical field [0001] The high-frequency torque oscillator of the present invention mainly relates to the fields of oil and gas drilling, coal bed gas drilling, geological exploration and mining drilling tools. Background technique [0002] With the deepening of the implementation of the national energy strategy, the number of exploration and development of deep wells, ultra-deep wells, and wells with complex structures in the fields of oil and gas drilling, coalbed methane drilling, geological exploration, and mining drilling industries is increasing. During the drilling process, as the well depth increases, the rock hardness becomes higher and higher, and the drillability becomes poorer, which seriously affects the improvement of mechanical drilling efficiency. Field drilling data show that the average ROP of the deep well section is only 15%-30% of the average ROP of the upper well section, and even lower than 8% in some areas. The data provided by the downhole measurem...

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Problems solved by technology

Many universities and research institutes in China have conducted analysis and research on the principle of Torbuster tools, and the related tools developed are basically similar to its structural principle, mainly using the energy of drilling fluid to make the pendulum swing back and forth, thereby generating circumferential vibration on the drill bit. Effect, such as: CN201810496627.9, CN201310586179.9, CN201610321016.1, CN201310698227.3, CN201310014444.6, CN201310108104.X, CN201410306930.X, CN2018698. While providing the positive vibration effect, the reverse vibration effect will also be produced. The reverse vibration not only consumes drilling fluid energy, but also is ineffective in suppressing the vibration of the drill bit, and is not conducive to improving the rock breaking efficiency of the drill bit. At the same time, this reciprocating vibration vibration principle also has the disadvantage of high pressure loss, which makes the existing domestic pump equipment in a high-load state for a long time, which is easy to cause equipment damage, and the developed tools are too long to meet the requirements of directional wells, Due to the requirements of drilling technology such as complex structure wells, the scope of application is limited; therefore, relevant domestic institutions have proposed structures based on the principle of rotary vibration, such as: CN201810257135.4, CN201420040141.1, CN201620602560.9, CN200910058083.9, CN201610399777.9, through analysis It can be seen that although this rotating vibration principle improves the high pressure consumption of the reciprocating swinging principle, it requires high machining accuracy and is difficult, the heat treatment process of parts and components is complicated, and the service life is short, so it cannot meet the requirements of domestic drilling technology. Require

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