Worm-driven double-valve hydraulic oscillator

Abstract

The invention relates to a worm-driven double-valve hydraulic oscillator, belonging to the technical field of petroleum, natural gas extraction and drilling tools. The oscillator is composed of a vibration short-circuit assembly and a power short-circuit assembly; the vibration short-circuit assembly and the power short-circuit assembly are connected mutually through a screw thread; the power short-circuit assembly is composed of a compression sleeve, a worm shaft, a main engine shell, a lower joint, a shunting ring and a shunting sleeve; the compression sleeve is arranged at the upper end of the main engine shell through a screw thread; the lower joint is arranged at the lower end of the main engine shell through a screw thread; the worm shaft is arranged in the main engine shell; an end cover is arranged at the end head of the upper end of the worm shaft through a screw thread; an upper alignment bearing and a lower alignment bearing are arranged at the circumference of the worm shaft which is below the end cover; the shunting ring is arranged at the circumference of the worm shaft which is below the lower alignment bearing through the shunting sleeve. According to the worm-driven double-valve hydraulic oscillator, the drilling efficiency is improved, in comparison with the traditional technology, the energy consumption is reduced, and the service life is prolonged, and the worm-driven double-valve hydraulic oscillator is particularly suitable for construction need of petroleum, natural gas extraction and drilling.

Description

technical field [0001] The invention relates to a turbine-driven double-valve hydraulic oscillator, which belongs to the technical fields of petroleum and natural gas exploitation and drilling tools. Background technique [0002] With the development and development of oilfields, shallow oilfields have been basically developed. The number of wells with complex structures such as highly deviated wells, horizontal wells and horizontal lateral wells is increasing, and their drilling efficiency is also getting lower and lower. The biggest obstacle affecting drilling speed during drilling is the frictional resistance generated during drilling. In order to reduce frictional resistance and reduce back pressure and sticking phenomena during sliding drilling. People have found through research that applying appropriate periodic axial vibration to the drilling string can change the static friction force between the drilling tool and the well wall into dynamic friction force, which c...

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Problems solved by technology

[0004] The purpose of the present invention is to: provide a simple structure; can provide normal and stable oscillation force, effectively reduce the frictional resistance of the drilling tool when drilling, improve the mechanical pen

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