Variable-frequency all-metal hydraulic oscillator

Abstract

The utility model belongs to the technical field of petroleum drilling equipment, and particularly relates to a variable-frequency all-metal hydraulic oscillator which mainly comprises 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 the driving of slurry to drive a pulse system at the lower part to generate pulse pressure, so that 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 according to needs, the oscillation frequency can be adjusted according to needs, well drilling requirements can be better met, and the service life of the hydraulic oscillator is prolonged.

Description

Technical Field

[0001] The utility model 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 energy, there are more and more directional wells and horizontal wells. In directional drilling, pressure-supporting situations often occur. Due to the directional pressure-supporting situation, the drilling cycle is seriously affected. In order to solve the pressure-supporting problem, various tool manufacturers have successively launched various anti-pressure-off 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 situation at the drilling site, we found that some pressure-supporting tools were lowered into the well from the vertical section to work. When they reached the directional section, the tools that are prone to pressure-supporting were already in the later stage of use. In addition, the working flow of some tools changed from top to bottom, affecting the use effect of the tools. Utility Model Content

[0003] The purpose of the utility model 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 utility model 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, with a group of centering bearings 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 dynamic valve seat is threadedly connected to the rotor shaft, the dynamic valve is shrink-fitted into the dynamic valve seat, the static valve seat is threadedly connected to the lower conversion joint, the static valve is shrink-fitted into the static valve seat, and the static valve and the dynamic 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 requirements and extending the service life of the hydraulic oscillator. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural diagram of the utility model;

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

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

[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 can 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second" and the like 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 present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixedly connected," and "fixed connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention based on 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 mainly consists of an oscillation system and a power system. The power system mainly generates mechanical kinetic energy from the turbine stator and rotor, driven by mud, which drives the lower pulse system to generate pulse pressure, which acts on the oscillation system to produce 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 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 connection 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, with a group of centering bearings 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 dynamic valve seat is threadedly connected to the rotor shaft, the dynamic valve is shrink-fitted into the dynamic valve seat, the static valve seat is threadedly connected to the lower conversion joint, the static valve is shrink-fitted into the static valve seat, and the static valve and the dynamic 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, through the hollow flow channel, and 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 is needed to work. A small ball is first dropped from the wellhead drilling tool. The ball has a through hole. The size of the hole is determined according to the required frequency. After the ball is dropped, 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 reaches the horizontal section or a higher frequency is required, a large ball is dropped. The large ball falls on the No. 1 flow control valve, and all the flow passes through the stator and rotor to do work. The hydraulic oscillator works at a high frequency and the oscillator's oscillation force is also increased.

[0019] It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications 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 by: It is mainly composed of an oscillation system and a power system. The power system mainly consists of the turbine stator and rotor driven by the mud, which generates mechanical kinetic energy to drive the pulse system at the bottom to generate pulse pressure, thereby acting on the oscillation system to generate axial vibration. The power system includes an upper conversion joint, a No. 1 flow control valve, a turbine housing, a stator, a rotor, a lower centering bearing outer ring, a lower centering bearing inner ring, a rotor shaft, a spacer, a lower conversion joint, an O-ring, a static valve seat, a static valve, a dynamic valve, a dynamic valve seat, an upper centering bearing outer ring, an upper centering bearing inner ring, a stator adjustment sleeve, a rotor adjustment sleeve, a No. 2 flow control valve, a small ball, and a large ball; 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, with a group of centering bearings 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 dynamic valve seat is threadedly connected to the rotor shaft, the dynamic valve is shrink-fitted into the dynamic valve seat, the static valve seat is threadedly connected to the lower conversion joint, the static valve is shrink-fitted into the static valve seat, and the static valve and the dynamic valve are in surface contact.

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