Turbine Hydraulic Shaker for Drilling

Abstract

The invention relates to a turbine type hydraulic oscillator for well drilling, comprising a vibrating nipple assembly and a power nipple assembly, a static valve and a dynamic valve are arranged in the power nipple assembly, a dynamic valve flow channel is arranged on the dynamic valve, and a static valve The static valve channel is set on the top; the flow area connected between the movable valve channel and the static valve channel changes periodically, so that the inflowing drilling fluid produces axial simple harmonic pressure waves; Shaft and turbine rotating drive structure, the top of the turbine shaft is connected to the adjusting nozzle, which is used to adjust the drilling fluid flow through the turbine rotating driving structure to adjust the frequency of the simple harmonic pressure wave; the simple harmonic pressure wave can be transmitted to the vibration short Joint assembly, the vibrating short joint assembly can produce continuous axial simple harmonic vibration under its action. The invention solves the underpressure and sticking phenomenon in the deep well oil-based mud drilling process, overcomes the shortcomings of the existing hydraulic oscillator, converts static friction into dynamic friction, reduces friction, increases effective drilling pressure, and effectively improves the ROP .

Description

technical field [0001] The invention relates to the technical field of oil and natural gas drilling, in particular to a turbine hydraulic oscillator for drilling. Background technique [0002] With the development of oil exploration and development technology, in order to improve the recovery rate and increase the output of oil and gas fields, the proportion of horizontal wells, lateral wells, and extended-reach wells is increasing. The friction between the rocks is relatively large, which causes the drill string to under pressure and stick during the drilling process. Especially in the sliding drilling process, the drill string and the rock on the well wall are in a relatively static state within a certain period of time. Since the static friction is much greater than the friction This increases the lowering resistance of the drill string, reducing the WOB applied to the drill bit through the drill string, resulting in lower ROP, longer drilling cycle, and increased drillin...

AI Technical Summary

Problems solved by technology

However, the screw-driven hydraulic oscillator has a large pressure drop, and because it contains a stator of rubber material inside, it cannot be used in oil-based mud and cannot withstand high temperatures. These shortcomings limit this type of hydraulic oscillator. scope of application

Another type of hydraulic oscillator is the turbine-driven hydraulic oscillator. This type of tool can make up for the deficiency of the screw-driven hydraulic oscillator, but there are also certain problems in this type of tool, such as the high speed of the turbine. , so that the frequency is too high and the amplitude is low, that is, the oscillation force is relatively small, and the field application effect is poor

Images