a hydraulic oscillator

Abstract

The invention discloses a hydraulic oscillator. The hydraulic oscillator comprises a vibration short section and a power short section which are connected through screw threads, wherein the power short section comprises a turbine section, a support section and a main shaft; the turbine section and the support section are connected in a sealed way through screw threads; the main shaft is arranged in the center inside the turbine section and the support section; the lower end of the main shaft is connected with a valve system arranged inside the support section; the valve system sequentially comprises a movable valve seat, a movable valve plate, a fixed valve plate and a fixed valve seat from top to bottom; the movable valve plate and the movable valve seat are fixedly connected through interference fit; the fixed valve plate and the fixed valve seat are fixedly connected through interference fit; and a plurality of first overflowing holes uniformly distributed in the circumference direction of the movable valve plate are formed in the movable valve plate, and a plurality of second overflowing holes uniformly distributed in the circumference direction of the fixed valve plate are formed in the fixed valve plate, so that when the movable valve plate rotates through being driven by the main shaft, the overflowing area of an overlapping region formed by staggering or overlapping the first overflow holes and the second overflow holes periodically changes. The hydraulic oscillator has the advantages of high-temperature resistance, long service life and high work efficiency.

Description

technical field [0001] The present invention relates to the technical field of drilling engineering, more specifically, the present invention relates to a hydraulic drilling machine that can effectively reduce friction, transmit drilling pressure and improve drilling speed and production efficiency in the production of highly deviated wells, horizontal wells and other complex structure wells. 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,...

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Problems solved by technology

[0004] Hydraulic oscillating tools have been put into commercial use for many years, with good drag reduction effect and obvious speed increase. According to statistics, the comprehensive mechanical drilling speed has increased by 50%, but its low life and high cost of use have caused it to be criticized. According to field application feedback, The service life of hydraulic oscillating tools is about 150 hours in water-based mud, but only 70-80 hours in oil-based mud. The reason is that the main component that restricts the life of hydraulic oscillating tools is its power assembly. As a result, the service life of hydraulic oscillating tools is equivalent to that of screw drilling tools. The rubber component screw contained in the power assembly limits its service life. In high-temperature wells, the service life will be greatly reduced. very restrictive

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