Ablation-resistant high-voltage discharge electrode used in oil and gas well

Abstract

The utility model provides an ablation-resistant high-voltage discharge electrode used in an oil and gas well. The ablation-resistant high-voltage discharge electrode comprises a discharge device upper section and a discharge device lower section which are arranged mutually, the interior of the discharging device upper section is hollow, and a groove is formed in the end face, facing the discharging device upper section, of the discharging device lower section. The insulating sleeves are respectively arranged on the inner walls of the discharge device upper section and the discharge device lower section; the upper electrode body is arranged in the insulating sleeve at the upper section of the discharge device, and the lower end of the upper electrode body extends downwards into the discharge area; the lower electrode body is arranged in the insulating sleeve at the lower section of the discharge device, and the upper end of the lower electrode body extends upwards into the discharge area; the binding post is arranged on the upper end face of the upper electrode body and used for being connected with an external discharging position. And one of the two discharging assemblies is rotatably arranged at one end, located in the discharging area, of the upper electrode body, and the other discharging assembly is rotatably arranged at one end, located in the discharging area, of the discharging device.

Description

Technical Field

[0001] The utility model relates to the field of electrodes, in particular to an ablation-resistant high-voltage discharge electrode used in oil and gas wells. Background Art

[0002] High-voltage discharge electrodes are often used in pulse power devices. The function of the discharge electrode is to use the positive and negative high voltages to break through the medium between the electrodes to form a discharge, and use the energy of the high-voltage discharge to generate continuous pulse shock waves, which act on the oil and gas well reservoir to achieve functions such as unblocking.

[0003] In the current development of oil and gas fields, physical methods are often used to increase the recovery rate of oil and gas wells, among which electric explosion is a major method used in wells. It mainly uses high-voltage discharge in the well to generate shock waves and liquid-electric effects, which act on the oil and gas reservoirs to remove blockages in the near-well area of ​​the oil and gas wells to increase the recovery rate of the oil and gas wells. In oil and gas wells, when electric explosion occurs, arc discharge is generated due to the high voltage breakdown of both ends of the high-voltage discharge electrode, which is very easy to be ablated, causing the electrode gap to become larger, affecting normal discharge.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The utility model provides a high-voltage discharge electrode which is resistant to ablation and is used in oil and gas wells, so as to solve the technical problem that the electrode is easily ablated.

[0006] A high-voltage discharge electrode resistant to ablation in oil and gas wells, comprising a discharge device upper section and a discharge device lower section which are rigidly connected to each other and arranged in an integral manner, wherein a discharge zone is formed between the discharge device upper section and the discharge device lower section; the interior of the discharge device upper section is hollow, and a groove is provided on the end surface of the discharge device lower section facing the discharge device upper section; and

[0007] Insulating sleeves, the insulating sleeves are respectively arranged on the inner walls of the upper section of the discharge device and the lower section of the discharge device;

[0008] An upper electrode body, the upper electrode body being disposed in an insulating sleeve located in the upper section of the discharge device, and the lower end of the upper electrode body extending downward into the discharge region;

[0009] A lower electrode body, the lower electrode body being arranged in an insulating sleeve located in the lower section of the discharge device, and the upper end of the lower electrode body extending upward into the discharge region;

[0010] A terminal, the terminal being arranged on the upper end surface of the upper electrode body and used for connecting to an external discharge point;

[0011] Two discharge components, one of which is rotatably arranged at one end of the upper electrode body located in the discharge area, and the other is rotatably arranged at one end of the discharge device located in the discharge area.

[0012] Preferably, the discharge assembly comprises a spherical column electrode, a bearing and a pin shaft, the interior of the spherical column electrode is hollow, the bearing is arranged inside the spherical column electrode, and the pin shaft passes through and is fixed on the bearing;

[0013] The upper electrode body and the lower electrode body are both provided with an electrode mounting groove and a shaft mounting groove, and the pin shaft is fixedly arranged in the shaft mounting groove, so that the spherical column electrode rotates in the electrode mounting groove through the bearing;

[0014] The two spherical-column electrodes are symmetrically arranged.

[0015] Preferably, a threaded hole is provided on the upper end surface of the upper electrode body, and the terminal is threadedly connected in the threaded hole.

[0016] In summary, during normal discharge, the spherical cylindrical electrode always discharges at a certain top surface. The discharge impact can cause the upper and lower spherical cylindrical electrodes to rotate along the bearing. The discharge position is different each time, so the discharge ablation points appear randomly, avoiding long-term discharge ablation at a fixed position, thereby extending the service life of the electrode, reducing the frequent adjustment of the electrode gap due to discharge ablation, and ensuring the normal high-voltage continuous discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A cross-sectional view provided in one embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of a spherical-column electrode provided in one embodiment of the present utility model.

[0020] In the above drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. Terminal; 2. Upper electrode body; 3. Insulating sleeve; 4. Upper section of discharge device; 5. Discharge assembly; 5-1. Spherical-column electrode; 5-2. Bearing; 6. Pin; 7. Lower section of discharge device; 8. Lower electrode body. DETAILED DESCRIPTION

[0022] In order to make the above and other features and advantages of the utility model more clear, the utility model is further described below in conjunction with the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explaining to those skilled in the art and are only exemplary and not restrictive.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] The utility model discloses a high-voltage discharge electrode for oil and gas wells that is resistant to ablation, comprising a discharge device upper section 4 and a discharge device lower section 7 that are rigidly connected to each other and are integrally arranged, wherein a discharge zone is formed between the discharge device upper section 4 and the discharge device lower section 7; the interior of the discharge device upper section 4 is hollow, and a groove is provided on the end surface of the discharge device lower section 7 facing the discharge device upper section 4; and an insulating sleeve 3, which is respectively arranged on the inner walls of the discharge device upper section 4 and the discharge device lower section 7;

[0028] An upper electrode body 2, the upper electrode body 2 is arranged in an insulating sleeve 3 located in the upper section 4 of the discharge device, and the lower end of the upper electrode body 2 extends downward into the discharge area; a lower electrode body 8, the lower electrode body 8 is arranged in an insulating sleeve 3 located in the lower section 7 of the discharge device, and the upper end of the lower electrode body 8 extends upward into the discharge area; a terminal 1, the terminal 1 is arranged on the upper end surface of the upper electrode body 2, and is used to connect an external discharge line; two discharge components 5, one of which is rotatably arranged at one end of the upper electrode body 2 located in the discharge area, and the other is rotatably arranged at one end of the discharge device located in the discharge area. The upper electrode body 2 and the lower electrode body 8 are both threadedly connected in the insulating sleeve 3.

[0029] The upper section 4 and the lower section 7 of the discharge device are rigidly connected and integrally arranged to form a complete discharge device. Windows are provided on both sides of the discharge device. The windows face the discharge area and are used to discharge the arc pulses generated in the discharge area. Figure 1 The figure shows the unhatched area in the sectional view, which is the window.

[0030] On the basis of the above embodiments, some other embodiments of the present application may be further increased or limited by one or more of the following combinations on the basis of the above specific embodiments.

[0031] The discharge assembly 5 includes a spherical column electrode 5-1, a bearing 5-2 and a pin 6. The spherical column electrode 5-1 is hollow inside, the bearing 5-2 is arranged inside the spherical column electrode 5-1, and the pin 6 passes through and is fixed on the bearing 5-2.

[0032] The upper electrode body 2 and the lower electrode body 8 are both provided with an electrode mounting groove and a shaft mounting groove, wherein the electrode mounting groove is provided on the end surfaces of the upper and lower electrode bodies 8 in a longitudinal direction;

[0033] The shaft mounting groove is located inside the upper and lower electrode bodies 8, is horizontal, and is opened on the inner wall of the electrode mounting groove. The two ends of the pin shaft 6 are respectively fixed in the shaft mounting grooves on the inner walls of both sides of the electrode mounting groove. When the spherical column electrode 5-1 needs to rotate, the pin shaft 6 and the inner ring of the bearing 5-2 are fixed, and the outer ring of the bearing 5-2 drives the spherical column electrode 5-1 to rotate, which is used for the spherical column electrode 5-1 to rotate in the electrode mounting groove through the bearing 5-2; the upper and lower spherical column electrodes 5-1 are symmetrically arranged.

[0034] The upper end surface of the upper electrode body 2 is provided with a threaded hole, and the outer surface of the terminal 1 is provided with threads so as to be threadedly connected in the threaded hole.

[0035] In summary, when the power pulse device is working, high voltage electricity is applied to both ends of the upper and lower spherical electrodes 5-1 through the upper electrode body 2. When the voltage rises to a certain value, the gap between the spherical electrodes 5-1 is broken down to generate discharge. During discharge, the arc acts on the end faces of the upper and lower spherical electrodes 5-1 respectively, and the generated electric pulse torque will cause the spherical electrode 5-1 to rotate around the bearing 5-2, so that the position of the discharge arc acting on the spherical electrode 5-1 is different each time; the utility model uses the above technical measures to avoid the electrode discharge point being in one position for a long time, which is random, so it can effectively solve the ablation phenomenon of the electrode during continuous pulse discharge and extend the working life of the electrode.

[0036] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A high-voltage discharge electrode resistant to ablation for use in oil and gas wells, characterized in that: It comprises an upper section of a discharge device and a lower section of a discharge device which are rigidly connected to each other and are integrally arranged, wherein a discharge area is formed between the upper section of the discharge device and the lower section of the discharge device; the interior of the upper section of the discharge device is hollow, and a groove is formed on the end surface of the lower section of the discharge device facing the upper section of the discharge device; and Insulating sleeves, the insulating sleeves are respectively arranged on the inner walls of the upper section of the discharge device and the lower section of the discharge device; An upper electrode body, the upper electrode body being disposed in an insulating sleeve located in the upper section of the discharge device, and the lower end of the upper electrode body extending downward into the discharge region; A lower electrode body, the lower electrode body being arranged in an insulating sleeve located in the lower section of the discharge device, and the upper end of the lower electrode body extending upward into the discharge region; A terminal, the terminal being arranged on the upper end surface of the upper electrode body and used for connecting to an external discharge point; Two discharge components, one of which is rotatably arranged at one end of the upper electrode body located in the discharge area, and the other is rotatably arranged at one end of the discharge device located in the discharge area.

2. The ablation-resistant high-voltage discharge electrode for oil and gas wells according to claim 1, characterized in that: The discharge assembly comprises a spherical column electrode, a bearing and a pin shaft, the interior of the spherical column electrode is hollow, the bearing is arranged inside the spherical column electrode, and the pin shaft passes through and is fixed on the bearing; The upper electrode body and the lower electrode body are both provided with an electrode mounting groove and a shaft mounting groove, and the pin shaft is fixedly arranged in the shaft mounting groove, so that the spherical column electrode rotates in the electrode mounting groove through the bearing; The two spherical-column electrodes are symmetrically arranged.

3. The ablation-resistant high-voltage discharge electrode for oil and gas wells according to claim 1, characterized in that: The upper end surface of the upper electrode body is provided with a threaded hole, and the terminal is threadedly connected in the threaded hole.

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