hydraulic oscillator

Abstract

The invention discloses a hydraulic oscillator. The hydraulic oscillator comprises an oscillating short piece, wherein the oscillating short piece comprises a sliding shaft, a sliding sleeve, a piston terminal I, a piston terminal II and an oscillating shell, wherein the sliding shaft is provided with a flow channel I, a flow channel II, a through hole I and a through hole II; the flow channel I does not communicate with the flow channel II; the sliding shaft is slidably connected with the sliding sleeve in the axial direction of the sliding shaft through a spline; the sliding sleeve is connected with an oscillating shell; the oscillating shell is provided with a piston cavity which is formed by extending in the axial direction of the oscillating shell and is used for accommodating the sliding shaft; a boss which is slidably connected with the sliding shaft is arranged on the inner wall of the oscillating shell; the piston cavity is divided into an upper cavity and a lower cavity by the boss; the piston terminal I is mounted on the sliding shaft positioned in the upper cavity; the piston terminal II is mounted on the sliding shaft positioned in the lower cavity; the oscillating shell is provided with a flow channel III; the piston terminal I is provided with a flow channel IV; and the piston terminal II is provided with a flow channel V. The hydraulic oscillator has the beneficial effects of skillful and unique structure, easiness in mounting and maintenance and remarkably improved oscillating effect.

Description

technical field [0001] The invention belongs to the technical field of oil exploitation equipment, and in particular relates to a hydraulic oscillator. Background technique [0002] With the development of the petroleum industry, the current oil field drilling has gradually developed from the original directional well to the horizontal well, and in the process of horizontal well drilling, due to the gravity of the drilling tool itself, the friction between the drilling tool and the well wall during drilling If it is too large, it will seriously affect the drilling speed, and even cause the backing pressure of the drilling tool to fail to pressurize the drill bit. Therefore, reducing friction, reducing stuck pipe accidents, increasing dynamic bit pressure, and improving drilling efficiency are problems that need to be solved urgently in current drilling projects. The study found that when the mud passes through the drilling tool, the mud pressure can change periodically, so ...

AI Technical Summary

Problems solved by technology

Taking the oscillator as an example, it has the following defects: the power components are the turbine shaft and the turbine blades, which generate periodic vibrations by periodically changing the internal pressure. There are many components and complex structures, which make installation and maintenance difficult; due to the use of the turbine shaft, As a result, the length is larger, the vibration force attenuates as the length increases, and there is a possibility of easy deformation and aggravated metal fatigue

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