An intelligent constant temperature control system for an oil field CCUS process wellhead

Abstract

The utility model provides an oil field CCUS process well mouth intelligence constant temperature control system, including anti -explosion electromagnetic heater subassembly and oil field CCUS process well mouth intelligence constant temperature control subassembly, and oil field CCUS process well mouth intelligence constant temperature control subassembly includes coil machine case, heating coil pipe and heating pipeline, heating coil pipe sets up in coil machine case, and one end of heating pipeline is detachably connected with the output end of heating coil pipe through flange, and the other end of heating pipeline is connected with Christmas tree, and the outer periphery of heating coil pipe and heating pipeline is covered with heat preservation layer, and is provided with probe thermocouple, and the outside of heat preservation layer is provided with electromagnetic wire, and one end of heating pipe is provided with first pressure sensor and first pressure -relief valve, and the other end of heating pipeline is provided with second pressure -relief valve. The utility model has solved the problem of high cold / high pressure oil field CCUS well mouth CO2 phase state instability and intensified pipeline corrosion, realized gradient temperature field regulation and control (axial temperature difference <2 DEG C).

Description

Technical Field

[0001] This utility model relates to the field of CCUS technology and intelligent equipment technology for oil and gas fields, and in particular to an intelligent constant temperature control system for wellheads in oilfield CCUS processes, which is suitable for CO2 supercritical phase stability control under extreme conditions such as high altitude and high pressure. Background Technology

[0002] Traditional wellhead heating systems (such as resistance wire heating) suffer from low energy efficiency (heat loss > 50%) and poor temperature control accuracy (deviation ±10℃) in the cold-climate oilfields of Northwest China, leading to CO2 phase instability and pipeline freezing. While existing technologies include CCUS equipment selection methods, they do not address precise temperature field control technology. Industrial catalogs explicitly promote electromagnetic heating technology as a key area for advancement, but current technologies lack dynamic thermal compensation strategies for complex wellhead conditions. Utility Model Content

[0003] The main purpose of this utility model is to provide an intelligent constant temperature control system for the wellhead of CCUS process in oilfields, which aims to solve the problems of CO2 phase instability and aggravated pipeline corrosion at the wellhead of CCUS in cold / high-pressure oilfields, realize gradient temperature field regulation (axial temperature difference <2℃), and adapt to the high-efficiency and low-carbon technology standards recommended by the Ministry of Industry and Information Technology.

[0004] To achieve the above objectives, this utility model proposes an intelligent constant temperature control system for wellheads in oilfield CCUS process, including an explosion-proof electromagnetic heater assembly and an intelligent constant temperature control assembly for wellheads in oilfield CCUS process. The intelligent constant temperature control assembly for wellheads in oilfield CCUS process includes a coil housing, a heating coil, and a heating pipeline.

[0005] The heating coil is installed inside the coil housing. One end of the heating pipe is detachably connected to the output end of the heating coil via a flange, and the other end of the heating pipe is connected to the wellhead. The heating coil and the heating pipe are covered with an insulation layer and equipped with a probe thermocouple. An electromagnetic wire is installed outside the insulation layer, and the two ends of the electromagnetic wire are respectively connected to the positive and negative poles of the electromagnetic heater. One end of the heating pipe is equipped with a first pressure sensor and a first pressure relief valve, and the other end of the heating pipe is equipped with a second pressure relief valve.

[0006] A further technical solution of this utility model is that the heating pipe includes a first pipe section, a second pipe section and a third pipe section. One end of the first pipe section is detachably connected to the heating coil through the flange. The first pressure sensor and the first pressure relief valve are disposed at one end of the first pipe section. The second pipe section is vertically connected between the other end of the first pipe section and one end of the third pipe section. One end of the third pipe section is provided with a pressure transmitter and a first safety valve. The second pressure relief valve is disposed at the other end of the third heating pipe section.

[0007] A further technical solution of this utility model is that the heating tube coil has a spiral structure to ensure good heating and heat exchange conduction with the medium.

[0008] A further technical solution of this utility model is that the electromagnetic wire is a waterproof high-frequency enameled wire.

[0009] A further technical solution of this utility model is that a second safety valve and a second pressure sensor are provided on one side of the coil unit.

[0010] A further technical solution of this utility model is that a rain cover is provided on the top of the coil unit.

[0011] A further technical solution of this utility model is that the explosion-proof electromagnetic heater assembly includes an explosion-proof cabinet and an explosion-proof cabinet door installed on the explosion-proof cabinet. The explosion-proof cabinet door is equipped with a temperature controller, an energy meter, an ammeter, a voltmeter, an operation panel, an explosion-proof indicator light, and operation buttons.

[0012] A further technical solution of this utility model is that the explosion-proof cabinet is equipped with a control module and an electromagnetic heater.

[0013] A further technical solution of this utility model is that the top of the explosion-proof cabinet is provided with a rain cover.

[0014] A further technical solution of this utility model is that an explosion-proof fan is provided on the top and back of the explosion-proof cabinet.

[0015] The beneficial effects of this utility model oilfield CCUS process wellhead intelligent constant temperature control system are:

[0016] This utility model, through the above-mentioned technical solution, includes: a coil housing, a heating coil, and a heating pipe; the heating coil has a spiral structure and is installed inside the coil housing; one end of the heating pipe is detachably connected to the output end of the heating coil via a flange; the other end of the heating pipe is connected to the Christmas tree; the heating coil and the heating pipe are covered with an insulation layer and equipped with a probe thermocouple; an electromagnetic wire is installed outside the insulation layer; one end of the heating pipe is equipped with a first pressure sensor and a first pressure relief valve; the other end of the heating pipe is equipped with a second pressure sensor and a second pressure relief valve. This solves the problems of CO2 phase instability and increased pipeline corrosion at the CCUS wellhead in high-altitude / high-pressure oilfields, achieves gradient temperature field control (axial temperature difference <2℃), and is compatible with the high-efficiency and low-carbon technology standards recommended by the Ministry of Industry and Information Technology. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the intelligent constant temperature control system for wellheads in the oilfield CCUS process of this utility model;

[0018] Figure 2 This is a front view of a preferred embodiment of the intelligent constant temperature control system for wellheads in the oilfield CCUS process of this utility model;

[0019] Figure 3 This is a schematic diagram of the overall structure of the explosion-proof cabinet and the coil unit enclosure;

[0020] Figure 4 This is a structural diagram of an explosion-proof cabinet and a coil unit enclosure without explosion-proof doors;

[0021] Figure 5 yes Figure 4 A cross-sectional view along the AA direction;

[0022] Figure 6 This is a schematic diagram of the internal structure of the explosion-proof cabinet;

[0023] Figure 7 This is a structural diagram of the explosion-proof cabinet from another angle;

[0024] Figure 8 This is a schematic diagram of the heating coil structure.

[0025] Explanation of icon numbers:

[0026] 1. Coil unit housing; 2. Heating coil; 3. Heating pipe; 4. Tree trunk; 5. Insulation layer; 6. Thermocouple probe; 7. Electromagnetic wire; 8. Second pressure relief valve; 9. First pipe section; 10. Second pipe section; 11. Third pipe section; 12. Pressure transmitter; 13. First safety valve; 14. Second safety valve; 15. Rain cover; 16. Explosion-proof cabinet; 17. Explosion-proof cabinet door; 18. Temperature controller; 19. Energy meter; 20. Ammeter; 21. Voltmeter; 22. Operation panel; 23. Explosion-proof indicator light; 24. Operation button; 25. Control module; 26. Explosion-proof fan; 27. Electromagnetic heater; 28. First pressure sensor; 29. ​​First pressure relief valve.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0028] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0029] This utility model proposes an intelligent constant temperature control system for wellheads in oilfield CCUS process, such as... Figures 1 to 8 As shown, it includes an explosion-proof electromagnetic heater 27 assembly and an intelligent constant temperature control assembly for the wellhead of the oilfield CCUS process. The intelligent constant temperature control assembly for the wellhead of the oilfield CCUS process includes a coil housing 1, a heating coil 2, and a heating pipe 3.

[0030] The heating coil 2 is housed within the coil housing 1, and one end of the heating pipe 3 is detachably connected to the output end of the heating coil 2 via a flange. The heating pipe 3 can be independently disassembled and replaced, facilitating convenient and economical maintenance of the entire system.

[0031] The other end of the heating pipe 3 is connected to the wellhead 4. The heating coil 2 and the heating pipe 3 are covered with an insulation layer 5 and a probe thermocouple 6 is provided. An electromagnetic wire 7 is spirally wound around the insulation layer 5. The two ends of the electromagnetic wire 7 are respectively connected to the positive and negative poles of the electromagnetic heater 27. A first pressure sensor 28 and a first pressure relief valve 29 are provided at one end of the heating pipe, and a second pressure relief valve 8 is provided at the other end of the heating pipe 3.

[0032] In this embodiment, the heating coil 2 and heating pipe 3 are preferably made of metal. An electromagnetic heater 27 energizes the electromagnetic wire 7, generating a magnetic field through the spiral electromagnetic wire 7. When the magnetic field lines pass through the metal heating pipe furnace body, they are cut, generating numerous small eddy currents. This causes the metal molecules within the metal pipe furnace body to rotate at high speed, generating heat through collision and friction, directly heating the pipe furnace body. The crude oil medium, under its own pressure, is heated through a flange connection via the induction-heated pipe furnace body by absorbing heat. The electromagnetic heater 27 is the source of electromagnetic energy output, with adjustable power and automatic temperature control protection for start / stop operation.

[0033] The insulation layer 5 is preferably insulation cotton. The insulation cotton is wrapped around the heating coil 2 and the heating pipe 3 to keep the heating pipe 3 warm and prevent excessive heat loss from affecting the heat conversion efficiency.

[0034] This embodiment uses electromagnetic heating instead of the traditional resistance heating wire method. It offers faster heating, a simpler structure, higher heat conversion rate, precise temperature control, and eliminates the safety hazard of open flames. It is also more energy-efficient, safer, more reliable, and has a longer service life. The electromagnetic heating method achieves a thermal efficiency of over 92%, saving 30%-50% more energy than traditional electric heating.

[0035] The electromagnetic wire 7 is a waterproof high-frequency enameled wire. When there is alternating current or an alternating electromagnetic field in the conductor of the electromagnetic wire 7, the current distribution inside the conductor is uneven, and the current is concentrated in the "skin" part of the conductor, that is, the current is concentrated in the thin outer layer of the conductor. The closer to the outer surface of the conductor, the greater the current density, while the actual current inside the conductor is relatively small. As a result, the resistance of the conductor increases, and its power loss also increases. This phenomenon is called the skin effect. When mica enameled wire is used as the electromagnetic wire 7 to wind the heating pipe 3 furnace body, the skin effect heating can be significantly reduced, and the power loss can be reduced.

[0036] In this embodiment, the heating coil 2 has a spiral structure to ensure good heating and heat transfer of the medium, and the heating pipe 3 is horizontally connected to the wellhead 4.

[0037] Further, in this embodiment, the heating pipe 3 includes a first pipe section 9, a second pipe section 10, and a third pipe section 11. One end of the first pipe section 9 is detachably connected to the heating coil 2 via the flange. The first pressure sensor 28 and the first pressure relief valve 29 are disposed at one end of the first pipe section 9. The second pipe section 10 is vertically connected between the other end of the first pipe section 9 and one end of the third pipe section 11. One end of the third pipe section 11 is provided with a pressure transmitter 12 and a first safety valve 13. The second pressure relief valve 8 is disposed at the other end of the third pipe section 11.

[0038] The first pipe section 9, the second pipe section 10, and the third pipe section 11 are made of DN65 material and have an overall T-shaped structure. This section is designated as the key heating control section.

[0039] In this embodiment, a second safety valve 14 and a second pressure sensor are provided on one side of the coil housing 1, and a rain cover 15 is provided on the top of the coil housing 1.

[0040] In this embodiment, the probe thermocouple 6 is used to determine whether the temperature is too high, thus protecting against overheating faults and adjusting the power of the electromagnetic heater 27 to change the heating temperature. The probe thermocouple 6 has an accuracy of ±1℃. If the internal temperature exceeds the limit, heating will automatically stop to avoid the risk of explosion.

[0041] Furthermore, in this embodiment, the explosion-proof electromagnetic heater 27 assembly includes an explosion-proof cabinet 16 and an explosion-proof cabinet door 17 disposed on the explosion-proof cabinet 16. The explosion-proof cabinet door 17 is equipped with a temperature controller 18, an energy meter 19, an ammeter 20, a voltmeter 21, an operation panel 22, an explosion-proof indicator light 23, and operation buttons 24. The explosion-proof cabinet 16 adopts a centralized management method and complies with the GB standard Exdepx CT4Gb explosion-proof standard.

[0042] The explosion-proof cabinet 16 is equipped with a control module 25 and an electromagnetic heater 27. The control module 25 includes the logic functions of the electromagnetic heater 27 and a secondary control circuit, realizing the automatic and coordinated operation of the heating control of the entire system.

[0043] The explosion-proof cabinet 16 is equipped with a rain cover 15 on its top and an explosion-proof fan 26 on its back.

[0044] In this embodiment, both the coil housing 1 and the explosion-proof cabinet 16 are made of corrosion-resistant materials and are designed to adapt to the high temperature, high pressure and corrosive environment at the wellhead.

[0045] The beneficial effects of this utility model oilfield CCUS process wellhead intelligent constant temperature control system are:

[0046] This utility model, through the above-mentioned technical solution, includes: a coil housing, a heating coil, and a heating pipe; the heating coil has a spiral structure and is installed inside the coil housing; one end of the heating pipe is detachably connected to the output end of the heating coil via a flange; the other end of the heating pipe is connected to the Christmas tree; the heating coil and the heating pipe are covered with an insulation layer and equipped with a probe thermocouple; an electromagnetic wire is installed outside the insulation layer; one end of the heating pipe is equipped with a first pressure sensor and a first pressure relief valve; the other end of the heating pipe is equipped with a second pressure sensor and a second pressure relief valve. This solves the problems of CO2 phase instability and increased pipeline corrosion at the CCUS wellhead in high-altitude / high-pressure oilfields, achieves gradient temperature field control (axial temperature difference <2℃), and is compatible with the high-efficiency and low-carbon technology standards recommended by the Ministry of Industry and Information Technology.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural changes made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. An intelligent constant temperature control system for wellheads in oilfield CCUS process, characterized in that, It includes an explosion-proof electromagnetic heater assembly and an intelligent constant temperature control assembly for the wellhead of the CCUS process in oilfields. The intelligent constant temperature control assembly for the wellhead of the CCUS process in oilfields includes a coil housing, a heating coil, and a heating pipeline. The heating coil is installed inside the coil housing. One end of the heating pipe is detachably connected to the output end of the heating coil via a flange, and the other end of the heating pipe is connected to the wellhead. The heating coil and the heating pipe are covered with an insulation layer and equipped with a probe thermocouple. An electromagnetic wire is installed outside the insulation layer, and the two ends of the electromagnetic wire are respectively connected to the positive and negative poles of the electromagnetic heater. One end of the heating pipe is equipped with a first pressure sensor and a first pressure relief valve, and the other end of the heating pipe is equipped with a second pressure relief valve.

2. The intelligent constant temperature control system for oilfield CCUS process wellheads according to claim 1, characterized in that, The heating pipeline includes a first pipeline section, a second pipeline section, and a third pipeline section. One end of the first pipeline section is detachably connected to the heating coil via the flange. The first pressure sensor and the first pressure relief valve are disposed at one end of the first pipeline section. The second pipeline section is vertically connected between the other end of the first pipeline section and one end of the third pipeline section. One end of the third pipeline section is provided with a pressure transmitter and a first safety valve, and the second pressure relief valve is disposed at the other end of the third pipeline section.

3. The intelligent constant temperature control system for oilfield CCUS process wellheads according to claim 1, characterized in that, The heating coil has a spiral structure to ensure good heating and heat transfer between the medium.

4. The intelligent constant temperature control system for oilfield CCUS process wellheads according to claim 1, characterized in that, The electromagnetic wire is a waterproof high-frequency enameled wire.

5. The intelligent constant temperature control system for oilfield CCUS process wellheads according to claim 1, characterized in that, A second safety valve and a second pressure sensor are installed on one side of the coil unit.

6. The intelligent constant temperature control system for oilfield CCUS process wellheads according to claim 1, characterized in that, The top of the coil unit is equipped with a rain cover.

7. The intelligent constant temperature control system for oilfield CCUS process wellheads according to claim 1, characterized in that, The explosion-proof electromagnetic heater assembly includes an explosion-proof cabinet and an explosion-proof cabinet door installed on the explosion-proof cabinet. The explosion-proof cabinet door is equipped with a temperature controller, an energy meter, an ammeter, a voltmeter, an operation panel, an explosion-proof indicator light, and operation buttons.

8. The intelligent constant temperature control system for oilfield CCUS process wellheads according to claim 7, characterized in that, The explosion-proof cabinet is equipped with a control module and an electromagnetic heater.

9. The intelligent constant temperature control system for oilfield CCUS process wellheads according to claim 7, characterized in that, The explosion-proof cabinet is equipped with a rain cover on top.

10. The intelligent constant temperature control system for oilfield CCUS process wellheads according to claim 7, characterized in that, An explosion-proof fan is installed on the top and back of the explosion-proof cabinet.

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