Long-life high-voltage pulse discharge electrode

Abstract

The utility model discloses a long-life high-voltage pulse discharge electrode, which comprises a first electrode body and a second electrode body, the first electrode body comprises a first electrode body, a discharge cylinder arranged at one end of the first electrode body and a limiting block arranged at the end part of the discharge cylinder; a plurality of discharge arc-shaped plates are arranged at one end of the second electrode body, the plurality of discharge arc-shaped plates are distributed in a circular array, a cylindrical cavity is formed among the plurality of discharge arc-shaped plates, a limiting groove is formed in the bottom of the cylindrical cavity, and a shock wave release port is formed by a gap between every two adjacent discharge arc-shaped plates; the limiting blocks are inserted into the limiting grooves, the discharging cylinders are inserted into the cylindrical cavities, and the gaps between the outer walls of the discharging cylinders and the inner walls of the discharging arc-shaped plates are equal. According to the electrode, the discharge region is the whole cylindrical region, so that the area of the discharge region is greatly increased; discharge ablation points appear randomly in the area, and long-time discharge ablation at a fixed position is avoided, so that the service life of the electrode is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of well completion tools, in particular to a long-life high-voltage pulse discharge electrode. Background Art

[0002] To increase oil and gas well recovery rates, physical methods are often used. Electric blasting is one of the primary methods used to increase oil and gas well recovery. This involves generating shock waves and a hydro-electric effect through high-voltage discharges in the wellbore. These shock waves act on the oil and gas reservoir, unblocking the near-wellbore area and increasing recovery rates.

[0003] When electric explosions occur in oil and gas wells, the high-voltage discharge electrodes are susceptible to erosion due to the high voltage and the medium being broken down. This causes the electrode gap to gradually widen, ultimately affecting normal discharge. Therefore, to ensure the proper functioning of electric explosion devices in wells, it is necessary to address the erosion of the discharge electrodes. Utility Model Content

[0004] To this end, the present invention provides a long-life high-voltage pulse discharge electrode to solve one or more of the above-mentioned problems.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A long-life high-voltage pulse discharge electrode comprises a first electrode body and a second electrode body; the first electrode body comprises a first electrode body, a discharge cylinder arranged at one end of the first electrode body, and a limit block arranged at the end of the discharge cylinder; a plurality of discharge arc plates are arranged at one end of the second electrode body, the plurality of discharge arc plates are distributed in a circular array and form a cylindrical cavity in the middle of the plurality of discharge arc plates, a limit groove is provided at the bottom of the cylindrical cavity, and the gap between adjacent discharge arc plates constitutes a shock wave release port; the limit block is inserted in the limit groove, the discharge cylinder is inserted in the cylindrical cavity, and the gap between the outer wall of the discharge cylinder and the inner wall of each discharge arc plate is equal.

[0007] Furthermore, the diameters of the first electrode body, the discharge cylinder, and the limiting block decrease in sequence.

[0008] Furthermore, the long-life high-voltage pulse discharge electrode also includes a first insulator; the first insulator includes a first insulating plate, a first through-hole for the discharge cylinder to pass through is provided in the middle of the first insulating plate, an annular slot coaxial with the first through-hole is provided on one side of the first insulating plate, and a first insulating sleeve coaxial with the first through-hole is provided on the other side of the first insulating plate; the first insulating plate is clamped between the first electrode body and the end face of the discharge arc plate, the end face of the first electrode body is provided with an annular groove coaxial with the discharge cylinder, the first insulating sleeve is inserted in the annular groove, and the end of the discharge arc plate is inserted in the annular slot.

[0009] Furthermore, the aperture of the first perforation, the inner diameter of the first insulating sleeve, the outer diameter of the discharge cylinder, and the inner diameter of the annular groove are all equal, the first insulating sleeve is adapted to the annular groove, and the arc shape of the discharge arc plate is adapted to the arc shape of the annular slot.

[0010] Furthermore, the long-life high-voltage pulse discharge electrode also includes a second insulator; the second insulator includes a second insulating plate and a second insulating sleeve, and the second insulating sleeve is arranged on one side of the second insulating plate; the second insulating plate is clamped between the end of the limit block and the bottom of the limit groove, and the second insulating sleeve is arranged between the side wall of the limit block and the wall of the limit groove.

[0011] Furthermore, the limit block is a cylinder, and the limit groove is a circular groove; the second insulating sleeve is a circular sleeve, the outer diameter of the second insulating sleeve is adapted to the inner diameter of the limit groove, and the inner diameter of the second insulating sleeve is adapted to the diameter of the limit block.

[0012] The utility model has the following advantages:

[0013] 1. Increase the discharge end surface area and extend the service life of the electrode. Compared with the existing "column-column" type electrode, the discharge area of ​​the electrode of this application is the entire cylindrical cavity after removing the shock wave release port, which greatly increases the area of ​​the discharge area; during normal discharge, the discharge is always at the top surface of a certain arc, and the discharge position is different each time. In this way, the discharge ablation point appears randomly, avoiding long-term discharge ablation at a fixed position, thereby extending the service life of the electrode, reducing the work of frequently adjusting the electrode gap due to discharge ablation, and ensuring the normal high-voltage continuous discharge.

[0014] 2. Simple processing, reducing electrode production costs.

[0015] 3. The first electrode body can be quickly replaced to change the gap between the discharge cylinder and the discharge arc plate, thereby changing the power of a single discharge pulse to meet the power pulse requirements of different power requirements.

[0016] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons skilled in the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, provided they do not affect the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0019] Figure 1 A schematic structural diagram of a long-life high-voltage pulse discharge electrode provided by an embodiment of the present utility model;

[0020] Figure 2 A schematic structural diagram of a first electrode body of a long-life high-voltage pulse discharge electrode provided by an embodiment of the present utility model;

[0021] Figure 3 This is a schematic structural diagram of the second electrode body of a long-life high-voltage pulse discharge electrode provided by an embodiment of the present utility model.

[0022] In the figure: 1. first electrode body; 11. first electrode body; 12. discharge cylinder; 13. limit block; 2. first insulator; 3. second insulator; 4. second electrode body; 41. discharge arc plate; 42. limit groove; 43. shock wave release port. DETAILED DESCRIPTION

[0023] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0024] like Figure 1-3As shown, this embodiment provides a long-life high-voltage pulse discharge electrode, including a first electrode body 1 and a second electrode body 4 , a first insulator 2 and a second insulator 3 .

[0025] The first electrode body 1 includes a first electrode body 11, a discharge cylinder 12 and a limit block 13; the discharge cylinder 12 is arranged at one end of the first electrode body 11; the limit block 13 is arranged at the end of the discharge cylinder 12 away from the first electrode body 11. The end of the second electrode body 4 facing the first electrode body 1 is provided with a plurality of discharge arc plates 41, and the plurality of discharge arc plates 41 are distributed in a circular array and form a cylindrical cavity in the middle of the plurality of discharge arc plates 41, which is used to accommodate the discharge cylinder 12; a limit groove 42 is provided at the bottom of the cylindrical cavity for accommodating the limit block 13, so that the discharge cylinder 12 does not shake in the cylindrical cavity (if it shakes, the gap will be uneven, affecting the discharge at random positions); the gap between adjacent discharge arc plates 41 constitutes a shock wave release port 43, from which the shock wave generated by the electrode discharge is transmitted outward. When the first electrode body 1 and the second electrode body 4 are installed or assembled, the limit block 13 is inserted in the limit groove 42 and isolated by the second insulator 3 arranged between the limit block 13 and the limit groove 42; the discharge cylinder 12 is inserted in the cylindrical cavity formed by the discharge arc plate 41, and a gap is provided between the outer wall of the discharge cylinder 12 and the inner wall of each discharge arc plate 41, and the gap is equal at each location, and is isolated by the first insulator 2 arranged between the first electrode body 11 and the discharge arc plate 41; it should be pointed out that the two insulators not only have the function of insulation, but also have the functions of fixing and shock absorption.

[0026] The first electrode body 1 and the second electrode body 4 are respectively connected to the anode and cathode of the power supply. When performing power pulse operation, high voltage is applied to the first electrode body 1 and the second electrode body 4. When the voltage reaches a certain value, it will break through the medium in the gap between the discharge cylinder 12 and the discharge arc plate 41, forming an arc and generating a series of shock waves. The shock waves are released outward along the shock wave release port 43, coupled to the reservoir through the medium in the wellbore, and then form a continuous shock wave effect.

[0027] Compared to existing "pillar-pillar" electrodes (in which the discharge end surface is actually the circular surface of the pillar end), the electrode of this application has a discharge region that covers the entire cylindrical cavity, excluding the shock wave release port 43, significantly increasing the area of ​​the discharge region. During normal discharge, discharge occurs randomly at a certain location within the discharge region, with each discharge location being different. This randomized discharge ablation point avoids prolonged discharge ablation at a fixed location, thereby extending the electrode's service life and reducing the need for frequent electrode gap adjustments due to discharge ablation, ensuring normal high-voltage continuous discharge.

[0028] Preferably, the first electrode body 11 and the stopper 13 are both cylindrical, the second electrode body 4 itself is also cylindrical, and the stopper groove 42 is a cylindrical sink, which makes processing and manufacturing easier. Preferably, the axes of the first electrode body 11, the discharge cylinder 12, and the stopper 13 are collinear, and the cylindrical cavity formed by the multiple discharge arc plates 41, the stopper groove 42, and the axis of the second electrode body 4 are collinear.

[0029] A second electrode body 4 can correspond to multiple first electrode bodies 1 of different sizes. The different sizes here refer to the different diameters of the discharge cylinder 12. By using different first electrode bodies 1 (essentially using discharge cylinders 12 of different diameters), the gap between the discharge cylinder 12 and the discharge arc plate 41 can be changed, thereby changing the power of a single discharge pulse to meet the power pulse requirements of different power requirements. When replacing, the first electrode body 1 can be replaced directly, or only the discharge cylinder 12 can be replaced (in this case, the discharge cylinder 12 and the first electrode body 11 are detachably connected), and the first insulator 2 is also replaced at the same time. In this embodiment, the diameters of the first electrode body 11, the discharge cylinder 12, and the limit block 13 are successively smaller, so that the smooth assembly of the first electrode body 1 and the second electrode body 4 can be ensured.

[0030] In this embodiment, the first insulator 2 includes a first insulating plate, the center of which is provided with a first through-hole for the discharge cylinder 12 to pass through, one side of the first insulating plate is provided with an annular slot coaxial with the first through-hole, and the other side of the first insulating plate is provided with a first insulating sleeve coaxial with the first through-hole. The first insulating plate is sandwiched between the first electrode body 11 and the end face of the discharge arc plate 41. The end face of the first electrode body 11 is provided with an annular groove coaxial with the discharge cylinder 12. The first insulating sleeve is inserted into the annular groove, and the end of the discharge arc plate 41 is inserted into the annular slot. Generally, the diameter of the first through-hole, the inner diameter of the first insulating sleeve, the outer diameter of the discharge cylinder, and the inner diameter of the annular slot are all equal. The first insulating sleeve is adapted to fit the annular groove, and the arc shape of the discharge arc plate is adapted to fit the arc shape of the annular slot. In this way, the first insulator can isolate the first electrode body 1 and the second electrode body 4, and can make the first electrode body 1 and the second electrode body 4 more stably fixed, and reduce the vibration or impact between the first electrode body 1 and the second electrode body 4, while limiting the discharge arc plate 41.

[0031] In this embodiment, the second insulator 3 includes a second insulating plate and a second insulating sleeve, the second insulating sleeve being disposed on one side of the second insulating plate; the second insulating plate being sandwiched between the end of the limiting block 13 and the bottom of the limiting groove 42, and the second insulating sleeve being disposed between the sidewall of the limiting block 13 and the wall of the limiting groove 42. Generally, the limiting block 13 is a cylinder, and the limiting groove 42 is a circular recessed groove; the second insulating sleeve is a circular sleeve, the outer diameter of the second insulating sleeve being adapted to the inner diameter of the limiting groove 42, and the inner diameter of the second insulating sleeve being adapted to the diameter of the limiting block 13. This effectively prevents the limiting block 13 from contacting the limiting groove 42 while confining the limiting block 13 within the limiting groove 42.

[0032] In the description of this specification, 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 this application 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 should not be understood as a limitation on this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0034] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0035] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] The disclosure above provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described above. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0037] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A long-life high-voltage pulse discharge electrode, characterized in that: The invention comprises a first electrode body (1) and a second electrode body (4); the first electrode body (1) comprises a first electrode body (11), a discharge cylinder (12) arranged at one end of the first electrode body (11), and a limit block (13) arranged at the end of the discharge cylinder (12); a plurality of discharge arc plates (41) are arranged at one end of the second electrode body (4), the plurality of discharge arc plates (41) are distributed in a circular array and form a cylindrical cavity in the middle of the plurality of discharge arc plates (41), a limit groove (42) is arranged at the bottom of the cylindrical cavity, and the gap between adjacent discharge arc plates (41) constitutes a shock wave release port (43); the limit block (13) is inserted in the limit groove (42), the discharge cylinder (12) is inserted in the cylindrical cavity, and the gap between the outer wall of the discharge cylinder (12) and the inner wall of each discharge arc plate (41) is equal.

2. The long-life high-voltage pulse discharge electrode according to claim 1, characterized in that: The diameters of the first electrode body (11), the discharge cylinder (12), and the limit block (13) decrease in sequence.

3. The long-life high-voltage pulse discharge electrode according to claim 1, characterized in that: The long-life high-voltage pulse discharge electrode further comprises a first insulator (2); the first insulator (2) comprises a first insulating plate, a first through-hole for the discharge cylinder (12) to pass through is provided in the middle of the first insulating plate, an annular slot coaxial with the first through-hole is provided on one side of the first insulating plate, and a first insulating sleeve coaxial with the first through-hole is provided on the other side of the first insulating plate; the first insulating plate is sandwiched between the first electrode body (11) and the end face of the discharge arc plate (41), the end face of the first electrode body (11) is provided with an annular groove coaxial with the discharge cylinder (12), the first insulating sleeve is inserted in the annular groove, and the end of the discharge arc plate (41) is inserted in the annular slot.

4. The long-life high-voltage pulse discharge electrode according to claim 3, characterized in that: The aperture of the first perforation, the inner diameter of the first insulating sleeve, the outer diameter of the discharge cylinder, and the inner diameter of the annular groove are all equal. The first insulating sleeve is adapted to the annular groove, and the arc shape of the discharge arc plate is adapted to the arc shape of the annular slot.

5. The long-life high-voltage pulse discharge electrode according to claim 1, characterized in that: The long-life high-voltage pulse discharge electrode further comprises a second insulator (3); the second insulator (3) comprises a second insulating plate and a second insulating sleeve, wherein the second insulating sleeve is arranged on one side of the second insulating plate; the second insulating plate is clamped between the end of the limiting block (13) and the bottom of the limiting groove (42), and the second insulating sleeve is arranged between the side wall of the limiting block (13) and the groove wall of the limiting groove (42).

6. The long-life high-voltage pulse discharge electrode according to claim 5, characterized in that: The limiting block (13) is a cylinder, and the limiting groove (42) is a circular recessed groove; the second insulating sleeve is a circular sleeve, the outer diameter of the second insulating sleeve is adapted to the inner diameter of the limiting groove (42), and the inner diameter of the second insulating sleeve is adapted to the diameter of the limiting block (13).

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