Variable-frequency all-metal hydraulic oscillator

Abstract

The invention belongs to the technical field of petroleum drilling equipment, and particularly relates to a variable-frequency all-metal hydraulic oscillator which is mainly composed of an oscillation system and a power system, the power system is mainly characterized in that a turbine stator and a turbine rotor generate mechanical kinetic energy under driving of slurry to drive a pulse system on the lower portion to generate pulse pressure, and therefore the pulse pressure acts on the oscillation system; and axial vibration is generated. By means of the frequency conversion design, the hydraulic oscillator can work as needed, the oscillation frequency can be adjusted as needed, the well drilling requirement can be better met, and the service life of the hydraulic oscillator is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of oil drilling equipment, and in particular relates to a variable frequency all-metal hydraulic oscillator. Background Art

[0002] At present, in the drilling projects of oil, natural gas and geothermal, there are more and more directional wells and horizontal wells. In directional drilling, pressure support often occurs. Due to the directional pressure support, the drilling cycle is seriously affected. In order to solve the pressure support problem, various tool manufacturers have launched various anti-pressure release tools, but the effect is general. The main reasons are that the pulse frequency of some tools affects the directional instrument signal, some have small shock force, and some tools have no obvious effect in the later stage. According to the usage of the drilling site, we found that some pressure support tools were put into the well from the vertical well section, and the tools that are easy to support pressure in the directional section have reached the later stage of use. In addition, the working flow of some tools changes from top to bottom, affecting the use effect of the tools. Summary of the invention

[0003] The purpose of the present invention is to provide a variable frequency all-metal hydraulic oscillator to solve the problems existing in the prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a variable frequency all-metal hydraulic oscillator, which is mainly composed of an oscillation system and a power system. The power system is mainly a turbine stator and rotor driven by mud to generate mechanical kinetic energy to drive the lower pulse system to generate pulse pressure, thereby acting on the oscillation system to generate axial vibration.

[0005] Preferably, the power system includes an upper conversion joint, a No. 1 flow regulating valve, a turbine housing, a stator, a rotor, a lower stabilizing bearing outer ring, a lower stabilizing bearing inner ring, a rotor shaft, a spacer sleeve, a lower conversion joint, an O-ring, a static valve seat, a static valve, a dynamic valve, a dynamic valve seat, an upper stabilizing bearing outer ring, an upper stabilizing bearing inner ring, a stator adjustment sleeve, a rotor adjustment sleeve, a No. 2 flow regulating valve, a small ball and a large ball.

[0006] Preferably, the upper conversion joint is connected to the upper part of the oscillation system, the lower part of the upper conversion joint is connected to the turbine housing, the lower part of the turbine housing is connected to the lower conversion joint, the lower conversion joint is connected to the drill pipe, the No. 1 flow regulating valve is connected to the upper end of the rotor shaft by a thread, the No. 2 flow regulating valve is connected to the inner hole of the upper end of the rotor shaft by a thread, the stator and the rotor are connected in series on the rotor shaft in multiple groups, and one group of centering bearings is provided at each end, the lower centering bearing outer ring and the lower centering bearing inner ring are at the lower part of the stator and the rotor, the upper centering bearing outer ring and the upper centering bearing inner ring are at the upper part of the stator and the rotor, the gap is adjusted by the stator adjusting sleeve and the rotor adjusting sleeve, the moving valve seat is threadedly connected to the rotor shaft, the moving valve is heat-fitted in the moving valve seat, the static valve seat is threadedly connected to the lower conversion joint, the static valve is heat-fitted in the static valve seat, and the static valve and the moving valve are in surface contact.

[0007] The beneficial effects of the present invention are as follows: the present invention mainly uses the frequency conversion design so that the hydraulic oscillator can work only when needed and the oscillation frequency can be adjusted according to needs, thus better adapting to drilling needs and extending the service life of the hydraulic oscillator. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the present invention;

[0009] Figure 2 It is a cross-sectional view of flow control valve No. 1 in the present invention;

[0010] Figure 3 It is a side view of flow control valve No. 1 in the present invention;

[0011] In the figure: 1-upper conversion joint 2-No. 1 flow control valve 3-turbine housing 4-stator 5-rotor 6-lower centering bearing outer ring 7-lower centering bearing inner ring 8-rotor shaft 9-spacer 10-lower conversion joint 11-O-ring 12-static valve seat 13-static valve 14-moving valve 15-moving valve seat 16-upper centering bearing outer ring 17-upper centering bearing inner ring 18-stator adjusting sleeve 19-rotor adjusting sleeve 20-No. 2 flow control valve 21-small ball 22-large ball 23-oscillation system. DETAILED DESCRIPTION

[0012] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0013] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0014] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fixed connection" and "fixed connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0015] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings and preferred embodiments.

[0016] like Figure 1As shown, a variable frequency all-metal hydraulic oscillator is mainly composed of an oscillation system and a power system. The power system is mainly that the turbine stator and rotor are driven by mud to generate mechanical kinetic energy to drive the lower pulse system to generate pulse pressure, thereby acting on the oscillation system to generate axial vibration. The power system includes an upper conversion joint 1, a No. 1 flow control valve 2, a turbine housing 3, a stator 4, a rotor 5, a lower centering bearing outer ring 6, a lower centering bearing inner ring 7, a rotor shaft 8, a spacer sleeve 9, a lower conversion joint 10, an O-ring 11, a static valve seat 12, a static valve 13, a dynamic valve 14, a dynamic valve seat 15, an upper centering bearing outer ring 16, an upper centering bearing inner ring 17, a stator adjustment sleeve 18, a rotor adjustment sleeve 19, a No. 2 flow control valve 20, a small ball 21 and a large ball 22. The upper conversion joint is connected to the upper part of the oscillation system 23, the lower part of the upper conversion joint is connected to the turbine housing, the lower part of the turbine housing is connected to the lower conversion joint, the lower conversion joint is connected to the drill pipe, the No. 1 flow regulating valve is connected to the upper end of the rotor shaft by a thread, the No. 2 flow regulating valve is connected to the inner hole of the upper end of the rotor shaft by a thread, the stator and the rotor are connected in series on the rotor shaft in multiple groups, and one group of centering bearings is provided at each end, the lower centering bearing outer ring and the lower centering bearing inner ring are at the lower part of the stator and the rotor, the upper centering bearing outer ring and the upper centering bearing inner ring are at the upper part of the stator and the rotor, the gap is adjusted by the stator adjustment sleeve and the rotor adjustment sleeve, the moving valve seat is threadedly connected to the rotor shaft, the moving valve is heat-installed in the moving valve seat, the static valve seat is threadedly connected to the lower conversion joint, the static valve is heat-installed in the static valve seat, and the static valve and the moving valve are in surface contact.

[0017] like Figure 2 As shown, flow control valve No. 1 has through holes around it and a ball hole in the middle.

[0018] After the variable frequency all-metal hydraulic oscillator is lowered into the well, there is no pressure support in the vertical well section, and the hydraulic oscillator does not need to work. The mud enters the power system from the oscillation system. There is a flow control valve at the top of the power system, which is in the open position at the beginning. The flow entering the power system flows from the inner hole of the valve into the inner hole of the rotor shaft, passes through the hollow flow channel, and flows downward into the lower drilling tool. The stator and rotor do not work, so the hydraulic oscillator is in a dormant state; in the directional section, the hydraulic oscillator needs to work. A small ball is first thrown into the drilling tool at the wellhead. There is a through hole on the small ball. The size of the hole is determined according to the required frequency. After the small ball is thrown in, it falls on the No. 2 flow control valve, and the hollow flow channel is closed. Only a small part of the mud flows into the rotor shaft through the through hole on the small ball, and the hydraulic oscillator starts to work; when drilling to the horizontal section or a higher frequency is required, a large ball is thrown in, and the large ball falls on the No. 1 flow control valve. All flows are done through the stator and rotor, the hydraulic oscillator works at a high frequency, and the oscillation force of the oscillator is also increased.

[0019] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A variable frequency all-metal hydraulic oscillator, characterized in that: It is mainly composed of an oscillation system and a power system. The power system is mainly composed of the turbine stator and rotor driven by the mud, which generates mechanical kinetic energy to drive the lower pulse system to generate pulse pressure, thereby acting on the oscillation system to generate axial vibration.

2. The variable frequency all-metal hydraulic oscillator according to claim 1 is characterized in that: The power system includes an upper conversion joint, a No. 1 flow regulating valve, a turbine housing, a stator, a rotor, a lower stabilizing bearing outer ring, a lower stabilizing bearing inner ring, a rotor shaft, a spacer sleeve, a lower conversion joint, an O-ring, a static valve seat, a static valve, a dynamic valve, a dynamic valve seat, an upper stabilizing bearing outer ring, an upper stabilizing bearing inner ring, a stator adjustment sleeve, a rotor adjustment sleeve, a No. 2 flow regulating valve, a small ball and a large ball.

3. The variable frequency all-metal hydraulic oscillator according to claim 2 is characterized in that: The upper conversion joint is connected to the upper part of the oscillation system, the lower part of the upper conversion joint is connected to the turbine housing, the lower part of the turbine housing is connected to the lower conversion joint, the lower conversion joint is connected to the drill pipe, the No. 1 flow regulating valve is connected to the upper end of the rotor shaft by threading, the No. 2 flow regulating valve is connected to the inner hole of the upper end of the rotor shaft by threading, the stator and the rotor are connected in series on the rotor shaft in multiple groups, and one group of centering bearings is provided at each end, the lower centering bearing outer ring and the lower centering bearing inner ring are at the lower part of the stator and the rotor, the upper centering bearing outer ring and the upper centering bearing inner ring are at the upper part of the stator and the rotor, the gap is adjusted by the stator adjustment sleeve and the rotor adjustment sleeve, the moving valve seat is threadedly connected to the rotor shaft, the moving valve is heat-installed in the moving valve seat, the static valve seat is threadedly connected to the lower conversion joint, the static valve is heat-installed in the static valve seat, and the static valve and the moving valve are in surface contact.

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