Composite multi-lateral electrode

Abstract

The utility model relates to the technical field of electrodes, in particular to a composite multi-lateral electrode, which comprises an electrode mandrel, a connector piece, an electrode upper connector, an electrode lower connector, a pressure-bearing sealing lead column, an oil filler plug, an insulating cylinder, a circuit board framework, a polymer insulating layer, an electrode steel ring, an insulating ring and a caulking nut, the oil filler plug is used for injecting silicone oil between the electrode core shaft and the electrode steel rings, the pressure balance between the interior and the exterior of the composite multi-lateral electrode is kept, the sealing performance is improved, the connector piece, the rubber pressing nut, the electrode core shaft, the electrode upper connector and the electrode lower connector are connected, all the electrode steel rings and the insulating rings on the exterior of the macromolecule insulating layer are pressed tightly, and the sealing performance is improved. According to the composite multi-lateral electrode, the multi-lateral distribution electrode is adopted, all-around analysis can be conducted on the periphery of a well casing, more detection information is obtained, fine analysis of a stratum structure is facilitated, and the problems that a traditional double-lateral electrode system obtains less stratum information and stratum oil reservoir analysis is limited are solved.

Description

Technical Field

[0001] This utility model relates to the field of electrode technology, and in particular to a composite multi-sided electrode. Background Technology

[0002] Currently, the electrical logging technology commonly used in China is the traditional two-sided logging, which has played an important role in oilfield exploration and development. However, with the continuous improvement of oilfield development, the shortcomings of traditional two-sided logging, such as limited formation information, inability to describe intrusion profiles in detail, and low vertical resolution, have made it unable to meet the requirements of logging interpretation and have become a bottleneck in formation reservoir analysis and interpretation.

[0003] Conventional dual-lateral electrode systems suffer severe wear during logging, with issues such as wear-off, misalignment, damage, and even breakage. Because the electrode probes are molded in a single process, with the electronic circuitry housed within the probe cavity, replacement and remanufacturing are necessary after wear, resulting in significant costs. Furthermore, in actual logging operations, dual-lateral electrode systems generate substantial signal interference and errors, impacting logging quality. Conventional dual-lateral instruments employ single-layer shielded electrodes for shallow lateral focus, while only employing double-layer shielded focus for deep lateral focus. Consequently, their detection depth is insufficient, leading to poor logging performance in large boreholes and saline-cement slurries due to borehole influence. This is particularly problematic in shallow lateral focus under the influence of borehole eccentricity in large boreholes, where the instrument fails to reflect the true resistivity changes of the formation. Utility Model Content

[0004] The purpose of this invention is to provide a composite multi-lateral electrode, which aims to solve the problem that traditional dual-lateral electrode systems obtain limited formation information and have limited formation reservoir analysis capabilities.

[0005] To achieve the above objectives, this utility model provides a composite multi-sided electrode, comprising an electrode mandrel, a connector, an upper electrode connector, a lower electrode connector, a pressure-bearing sealed lead post, an oil injection plug, an insulating cylinder, a circuit board skeleton, a polymer insulating layer, an electrode steel ring, an insulating ring, and a pressure-bonded nut. The polymer insulating layer is disposed on the outer surface of the electrode mandrel. The insulating ring is disposed on the side of the polymer insulating layer away from the electrode mandrel. The electrode steel ring is disposed on one side of the insulating ring. The upper electrode connector is connected to the electrode mandrel and located on one side of the electrode mandrel. The lower electrode connector is connected to the electrode mandrel and located on the side of the electrode mandrel away from the upper electrode connector. The pressure-bearing sealed lead post is disposed on one side of the lower electrode connector. The oil injection plug is disposed on one side of the lower electrode connector. The circuit board skeleton is connected to the electrode mandrel and passes through the lower electrode connector. The insulating cylinder is disposed on one side of the lower electrode connector. The connector is connected to both the upper electrode connector and the insulating cylinder. The pressure-bonded nut is threadedly connected to the connector and located on one side of the connector.

[0006] The composite multi-sided electrode further includes a compensator, which is disposed between the electrode connector and the polymer insulating layer.

[0007] The connector includes a first connector and a second connector. The first connector is connected to the upper electrode connector and is located on the side of the upper electrode connector away from the electrode core. The second connector is connected to the insulating cylinder and is located on the side of the insulating cylinder away from the lower electrode connector.

[0008] The pressure nut includes a first pressure nut and a second pressure nut. The first pressure nut is threadedly connected to the first connector and is located on the side of the first connector away from the electrode connector. The second pressure nut is threadedly connected to the second connector and is located on the side of the second connector away from the insulating cylinder.

[0009] The electrode core is made of corrosion-resistant and conductive materials, such as stainless steel or copper alloy. The polymer insulating layer, insulating cylinder and insulating ring are made of fiberglass. The pressure-bearing and sealing lead post is integrally formed from copper and polymer materials.

[0010] This invention discloses a composite multi-lateral electrode. The surface of the polymer insulating layer is machined with wire grooves for arranging wires. These wires contact the electrode steel ring via spring plates to achieve circuit continuity. An oil injection plug is used to inject silicone oil between the electrode mandrel and the electrode steel ring, maintaining pressure balance between the inside and outside of the composite multi-lateral electrode and improving sealing performance. The connector, the pressure nut, the electrode mandrel, the upper electrode connector, and the lower electrode connector are connected. These components press all the electrode steel rings and insulating rings on the outside of the polymer insulating layer tightly. This composite multi-lateral electrode uses multi-laterally distributed electrodes, enabling comprehensive analysis around the well casing, obtaining more detection information, and facilitating detailed analysis of the formation structure. It solves the problem of limited formation information and restricted formation reservoir analysis in traditional dual-lateral electrode systems. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0012] Figure 1 This is a schematic diagram of the structure of a composite multi-sided electrode according to this utility model.

[0013] Figure 2 yes Figure 1 A magnified view of detail A.

[0014] Figure 3 yes Figure 1 A magnified view of detail B.

[0015] Figure 4 yes Figure 1 A magnified view of detail C.

[0016] Figure 5 yes Figure 1 A magnified view of detail D.

[0017] In the figure: 1-Electrode mandrel, 2-Connector, 3-Upper electrode connector, 4-Lower electrode connector, 5-Pressure-bearing sealed lead post, 6-Oil plug, 7-Insulating cylinder, 8-Circuit board skeleton, 9-Polymer insulating layer, 10-Electrode steel ring, 11-Insulating ring, 12-Pressure nut, 13-Compensator, 14-First connector, 15-Second connector, 16-First pressure nut, 17-Second pressure nut. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0019] Please see Figures 1 to 5 This utility model provides a composite multi-sided electrode, including an electrode mandrel 1, a connector 2, an upper electrode connector 3, a lower electrode connector 4, a pressure-bearing sealed lead post 5, an oil injection plug 6, an insulating cylinder 7, a circuit board skeleton 8, a polymer insulating layer 9, an electrode steel ring 10, an insulating ring 11, and a pressure-bonded nut 12; the polymer insulating layer 9 is disposed on the outer surface of the electrode mandrel 1, the insulating ring 11 is disposed on the side of the polymer insulating layer 9 away from the electrode mandrel 1, the electrode steel ring 10 is disposed on the side of the insulating ring 11, and the upper electrode connector 3 is connected to the electrode mandrel 1 and located on the electrode. On one side of the mandrel 1, the lower electrode connector 4 is connected to the electrode mandrel 1 and is located on the side of the electrode mandrel 1 away from the upper electrode connector 3. The pressure-bearing sealing lead post 5 is located on one side of the lower electrode connector 4. The oil filling plug 6 is located on one side of the lower electrode connector 4. The circuit board skeleton 8 is connected to the electrode mandrel 1 and passes through the lower electrode connector 4. The insulating cylinder 7 is located on one side of the lower electrode connector 4. The connector 2 is connected to the upper electrode connector 3 and the insulating cylinder 7 respectively. The pressure-fit nut 12 is threadedly connected to the connector 2 and is located on one side of the connector 2.

[0020] In this embodiment, the surface of the polymer insulating layer 9 is processed with wire grooves to arrange wires. The wires are connected to the electrode steel ring 10 through spring plates to achieve circuit conduction. The oil injection plug 6 is used to inject silicone oil between the electrode mandrel 1 and the electrode steel ring 10 to maintain the pressure balance between the inside and outside of the composite multi-lateral electrode and improve the sealing performance. The connector 2, the pressure nut 12, the electrode mandrel 1, the upper electrode connector 3, and the lower electrode connector 4 are connected. The connector 2, the pressure nut 12, the upper electrode connector 3, and the lower electrode connector 4 press all the electrode steel rings 10 and the insulating ring 11 on the outside of the polymer insulating layer 9. This composite multi-lateral electrode adopts a multi-lateral distribution electrode, which can perform all-round analysis around the well pipe, obtain more detection information, facilitate fine analysis of the formation structure, and solve the problem of limited formation information and limited formation reservoir analysis obtained by traditional dual-lateral electrode systems.

[0021] Furthermore, the composite multi-lateral electrode also includes a compensator 13, which is disposed between the electrode connector 3 and the polymer insulating layer 9.

[0022] In this embodiment, the compensator 13 is used to compensate for the axial dimensional deviation of the electrode core 1 and the external polymer insulating layer 9 during thermal expansion and contraction.

[0023] Furthermore, the connector 2 includes a first connector 14 and a second connector 15. The first connector 14 is connected to the upper electrode connector 3 and is located on the side of the upper electrode connector 3 away from the electrode core 1. The second connector 15 is connected to the insulating cylinder 7 and is located on the side of the insulating cylinder 7 away from the lower electrode connector 4.

[0024] In this embodiment, the first connector 14 is connected to the electrode connector 3, and the second connector 15 is connected to the insulating cylinder 7, providing installation conditions for the pressure nut 12.

[0025] Furthermore, the pressure nut 12 includes a first pressure nut 16 and a second pressure nut 17. The first pressure nut 16 is threadedly connected to the first connector 14 and is located on the side of the first connector 14 away from the electrode connector 3. The second pressure nut 17 is threadedly connected to the second connector 15 and is located on the side of the second connector 15 away from the insulating cylinder 7.

[0026] In this embodiment, the first pressure nut 16 is connected to the first connector 14, and the second pressure nut 17 is connected to the second connector 15. It is used in conjunction with the first connector 14 and the second connector 15, thereby clamping all the electrode steel rings 10 and the insulating rings 11 on both sides of the electrode core 1.

[0027] Furthermore, the electrode core 1 is made of corrosion-resistant and conductive materials, such as stainless steel or copper alloy; the polymer insulating layer 9, insulating cylinder 7, and insulating ring 11 are made of fiberglass; and the pressure-bearing sealing lead post 5 is integrally formed from copper and polymer materials.

[0028] In this embodiment, the electrode mandrel 1 is made of corrosion-resistant and conductive materials, such as stainless steel or copper alloy, which have the characteristics of high hardness, light weight, easy operation, and resistance to deformation, thereby enhancing the mechanical strength of the electrode and improving its wear resistance and service life. The pressure-bearing and sealing lead post 5 is integrally formed from copper and polymer materials, which effectively protects the internal circuitry of the electrode and increases the electrode rod's temperature resistance, pressure resistance, and corrosion resistance, thus better coping with complex well conditions.

[0029] Fabrication instructions for the composite multi-sided electrode:

[0030] 1. First, the electrode mandrel 1, the upper electrode connector 3, the lower electrode connector 4, the electrode steel ring 10, and the insulating ring 11 are machined by turning, milling, drilling, and other machining methods;

[0031] 2. The pressure-bearing sealing lead post 5 is integrally molded from copper and polymer materials;

[0032] 3. Fabricate electrode wires, pressure compensation device spring plates, etc.;

[0033] 4. The polymer insulating material is wound and fixed on the electrode mandrel 1, and then wire grooves are machined on the surface of the insulating material;

[0034] 5. Insert the pressure-bearing sealing lead post 5 into the lower electrode connector 4, and then connect it to the electrode mandrel 1 by thread;

[0035] 6. Arrange electrode wires and pressure compensation device spring plates in the wire groove on the insulating ring 11 of the mandrel according to the drawings, and connect them to the corresponding pressure-bearing sealing lead post 5.

[0036] 7. Insert the insulating ring 11 and the electrode ring into the electrode core 1 in sequence from the upper end of the electrode, so that the spring sheet on the electrode wire corresponding to the electrode ring is connected and conductive;

[0037] 8. The electrode connector 3, the high-strength compression spring, and the pressure nut 12 are connected to the electrode spindle 1 and press all the electrode rings and the insulating ring 11 on the electrode spindle 1 tightly;

[0038] 9. The upper electrode connector is threadedly connected to the upper connector of 57, and the lower electrode connector 4 is sequentially connected to the insulating cylinder 7 and the lower connector of 57;

[0039] 10. The surface of the electrode core 1 is wrapped with polymer composite rubber and a special one-time molding process is adopted to make the core and components form a whole, which effectively improves the electrode rod's resistance to high temperature, high pressure and corrosion.

[0040] 11. Finally, fill the oil hole with silicone oil to balance the external pressure during use, ensuring that the electrode can be used normally in a high-pressure environment and ensuring the accuracy of the data.

[0041] The above-disclosed embodiment of a composite multi-side electrode is merely a preferred embodiment of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A composite multi-lateral electrode, characterized in that... ； Includes electrode mandrel, connector, upper electrode connector, lower electrode connector, pressure-bearing sealed lead post, oil injection plug, insulating cylinder, circuit board skeleton, polymer insulating layer, electrode steel ring, insulating ring and pressure-bonded nut; The polymer insulating layer is disposed on the outer surface of the electrode mandrel. The insulating ring is disposed on the side of the polymer insulating layer away from the electrode mandrel. The electrode steel ring is disposed on one side of the insulating ring. The upper electrode connector is connected to the electrode mandrel and is located on one side of the electrode mandrel. The lower electrode connector is connected to the electrode mandrel and is located on the side of the electrode mandrel away from the upper electrode connector. The pressure-bearing sealing lead post is disposed on one side of the lower electrode connector. The oil injection plug is disposed on one side of the lower electrode connector. The circuit board skeleton is connected to the electrode mandrel and passes through the lower electrode connector. The insulating cylinder is disposed on one side of the lower electrode connector. The connector is connected to the upper electrode connector and the insulating cylinder respectively. The pressure-fit nut is threadedly connected to the connector and is located on one side of the connector.

2. The composite multi-sided electrode as described in claim 1, characterized in that; The composite multi-sided electrode also includes a compensator, which is disposed between the electrode connector and the polymer insulating layer.

3. The composite multi-lateral electrode as described in claim 1, characterized in that... ； The connector includes a first connector and a second connector. The first connector is connected to the upper electrode connector and is located on the side of the upper electrode connector away from the electrode core. The second connector is connected to the insulating cylinder and is located on the side of the insulating cylinder away from the lower electrode connector.

4. The composite multi-sided electrode as described in claim 3, characterized in that... ； The pressure nut includes a first pressure nut and a second pressure nut. The first pressure nut is threadedly connected to the first connector and is located on the side of the first connector away from the electrode connector. The second pressure nut is threadedly connected to the second connector and is located on the side of the second connector away from the insulating cylinder.

5. The composite multi-sided electrode as described in claim 1, characterized in that... ； The electrode core is made of corrosion-resistant and highly conductive material, the polymer insulating layer, insulating cylinder and insulating ring are made of fiberglass, and the pressure-bearing sealing lead post is integrally formed from copper and polymer materials.

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