A system for simultaneous oil and heat extraction

Abstract

The application discloses an oil and heat simultaneous extraction system, comprising an oil and heat extraction and delivery mechanism and an injection and delivery mechanism; the oil and heat extraction and delivery mechanism comprises a negative pressure pipeline, an oil extraction part is formed on the negative pressure pipeline, and the negative pressure pipeline is used to form a negative pressure to extract oil from the oil extraction part; the injection and delivery mechanism comprises a plurality of flow delivery pipelines, the plurality of flow delivery pipelines are uniformly arranged along the circumference of the negative pressure pipeline and are arranged at intervals with the negative pressure pipeline; wherein, each flow delivery pipeline is provided with a jet part to inject supercritical carbon dioxide into oil. In the technical scheme of the application, the jet part is arranged on the flow delivery pipeline, and the plurality of flow delivery pipelines are uniformly arranged along the circumference of the negative pressure pipeline, so that the supercritical carbon dioxide near the negative pressure pipeline can be concentrated and distributed, thereby improving the flowability of the oil near the negative pressure pipeline, and further accelerating the efficiency of the negative pressure pipeline in extracting oil.

Description

Technical Field

[0001] This invention relates to the field of petroleum technology, and in particular to an oil and heat recovery system. Background Technology

[0002] Supercritical carbon dioxide (SCCO) technology is an emerging energy storage and conversion technology that has received widespread attention and research in various fields, including thermal energy storage and oil-thermal co-production. It primarily involves compressing carbon dioxide to a high-temperature, high-pressure state, giving it supercritical properties, and then using it as a working fluid for thermal energy storage or oil-thermal co-production. SCCO is injected into the oil field to increase oil fluidity and propel it towards the wellhead. However, in existing technologies, after SCCO is injected into water-bearing oil fields, uneven porosity within the oil field leads to crossflow and spillage of the SCCO, resulting in low oil production efficiency. Furthermore, in oil-thermal co-production, heat is easily lost through radiation during transmission. Therefore, it is necessary to provide an oil-thermal co-production system based on supercritical carbon dioxide to address the problems mentioned in the background technology. Summary of the Invention

[0003] The main objective of this invention is to provide an oil-heat co-extraction system, which aims to improve oil extraction efficiency and prevent heat from being wasted during oil transmission.

[0004] To achieve the above objectives, the present invention proposes an oil and heat co-extraction system, characterized in that it comprises: An oilfield thermal recovery and transportation mechanism includes a negative pressure pipeline, on which an oil extraction section is formed, and a negative pressure is created within the negative pressure pipeline to extract oil from the oil extraction section; and... The injection mechanism includes multiple injection pipes, which are evenly distributed along the circumference of the negative pressure pipe and spaced apart from it. Each of the aforementioned delivery pipes is equipped with a jet section for injecting supercritical carbon dioxide into the petroleum.

[0005] Optionally, the negative pressure pipeline includes: Multiple sections of pipe are arranged along their length; and, Multiple elastic bushings are fitted onto the ends of two adjacent sections to connect the two adjacent sections. Each of the aforementioned pipe sections is equipped with an oil production section.

[0006] Optionally, the negative pressure pipeline has an oil inlet end; The negative pressure pipeline also includes: Multiple extraction end pieces are respectively fitted onto multiple sections of pipe, each extraction end piece being located at the end of the pipe section closest to the oil inlet. Each extraction end piece has multiple inclined openings that connect to the inside of the pipe section for underground crude oil extraction and transportation; and... Multiple horizontal well gaps are provided, corresponding to each of the aforementioned inclined well openings, to improve the fluidity of underground crude oil.

[0007] Optionally, the negative pressure pipeline further includes: A positioning shaft seat is sleeved on multiple sections of tube. An elastic element is provided between the inner side wall of the positioning shaft seat and the outer side wall of the section of tube so that the center of the section of tube is positioned on the positioning shaft seat.

[0008] Optionally, the negative pressure pipeline further includes a vibrator fitted onto the negative pressure pipeline to vibrate the negative pressure pipeline.

[0009] Optionally, the vibrator includes: The outer shaft frame has multiple air chambers radially distributed along its inner circumference, and each air chamber is slidably equipped with a sealing plug; the air chamber is also provided with an air inlet and an air outlet, and each air inlet and air outlet is independently supplied with and exhausts air. A guide sleeve is disposed within the outer shaft bracket, and the section tube is slidably disposed within the guide sleeve; and, The connector has one end connected to the sealing plug and the other end connected to the guide sleeve.

[0010] Optionally, an internal heat recovery pipe is also installed inside the pipe section, which is provided corresponding to the oil production section to absorb the heat of the underground crude oil extracted into the pipe section.

[0011] Optionally, the internal heat collection pipe includes: Multiple outer tubes are sequentially spliced ​​together along the extension direction; each outer tube has multiple protruding edges on its outer side wall. Multiple inner partition plates are fixed inside the outer pipe, dividing the outer pipe into a first water supply chamber, a second water supply chamber, and a return water chamber; and, Multiple flow dampers are used to control the water flow velocity inside the outer pipe body; wherein each of the flow dampers is correspondingly disposed in the first water delivery chamber and / or the second water delivery chamber.

[0012] Optionally, the flow slower is further provided with a one-way flow channel, which is arranged along the extension direction of the section pipe and connected to the return water chamber to collect information on the underground thermal distribution.

[0013] Optionally, the internal heat pipe is further provided with a flow controller, the flow controller comprising: Inlet and outlet ports; The inner tube extends along the direction of water flow and is slidably installed, with a spring sleeved on the periphery near the outlet port; The diversion port is located on the side of the flow controller relative to the inner tube; A flow-blocking shaft is positioned on the side of the inner tube near the water inlet port to partially block the inner tube; and, A flow-blocking ring is fitted onto the inner tube near the water inlet port. The flow controller also has a shaft ring to cooperate with the flow-blocking ring in order to control the flow of water inside the flow controller. Wherein, the water outlet direction of the inner tube corresponds to the first water delivery chamber, and the water outlet direction of the diversion port corresponds to the second water delivery chamber.

[0014] In the technical solution of the present invention, by setting the jet section on the delivery pipe and the multiple delivery pipes being evenly distributed along the periphery of the negative pressure pipe, the supercritical carbon dioxide near the negative pressure pipe can be concentrated and distributed, thereby improving the fluidity of oil near the negative pressure pipe and accelerating the efficiency of oil extraction from the negative pressure pipe. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the internal cross-sectional structure of an embodiment of an oil and heat recovery system provided by the present invention. Figure 2 for Figure 1 Enlarged internal cross-sectional schematic diagram of the CNPC thermal recovery and delivery mechanism and injection and delivery mechanism; Figure 3 for Figure 2 A schematic diagram of the partial internal cross-section of a medium- and negative-pressure pipeline; Figure 4 for Figure 3 Enlarged schematic diagram of the partial internal section at point A; Figure 5 for Figure 4 A schematic diagram of the partial internal cross-section of the intermediate seismic tube; Figure 6 for Figure 4 A schematic diagram of the partial internal cross-section of the central heat collection pipe; Figure 7 for Figure 4 Cross-sectional view of the internal heat collection pipe; Figure 8 for Figure 6Enlarged schematic diagram of the local internal section at point B.

[0017] Explanation of icon numbers:

[0018] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0022] Supercritical carbon dioxide (SCCO) technology is an emerging energy storage and conversion technology that has received widespread attention and research in various fields, including thermal energy storage and oil-thermal co-production. It primarily involves compressing carbon dioxide to a high-temperature, high-pressure state, giving it supercritical properties, and then using it as a working fluid for thermal energy storage or oil-thermal co-production. SCCO is injected into the oil field to increase oil fluidity and propel it towards the wellhead. However, in existing technologies, after SCCO is injected into water-bearing oil fields, uneven porosity within the oil field leads to crossflow and spillage of the SCCO, resulting in low oil production efficiency. Furthermore, in oil-thermal co-production, heat is easily lost through radiation during transmission. Therefore, it is necessary to provide an oil-thermal co-production system based on supercritical carbon dioxide to address the problems mentioned in the background technology.

[0023] To address the aforementioned problems, this invention proposes an oil-heat co-extraction system, aiming to provide a device that improves oil extraction efficiency and prevents heat loss during oil transport. Figures 1 to 8 This is a schematic diagram of an embodiment of an oil and heat extraction system provided by the present invention.

[0024] Please refer to Figures 1 to 2 This invention proposes an oil and heat co-production system 1000, including an oil and heat production and delivery mechanism 1 and an injection and delivery mechanism 9; the oil and heat production and delivery mechanism 1 includes a negative pressure pipe 2, on which an oil production section is formed, and the negative pressure pipe 2 is used to generate negative pressure to extract oil from the oil production section; the injection and delivery mechanism 9 includes a plurality of delivery pipes 91, which are evenly arranged along the circumference of the negative pressure pipe 2 and are spaced apart from the negative pressure pipe 2; wherein, each delivery pipe 91 is provided with a jet section 911 for injecting supercritical carbon dioxide into the oil.

[0025] In the technical solution of the present invention, by setting the jet section 911 on the delivery pipe 91, and by uniformly arranging multiple delivery pipes 91 along the periphery of the negative pressure pipe 2, the supercritical carbon dioxide near the negative pressure pipe 2 can be concentrated and distributed, thereby improving the fluidity of oil near the negative pressure pipe 2 and thus accelerating the efficiency of oil extraction by the negative pressure pipe 2.

[0026] Further, please refer to Figures 3 to 4The negative pressure pipeline 2 includes multiple pipe sections 3 and multiple elastic sleeves. The multiple pipe sections 3 are arranged along their length. The multiple elastic sleeves are fitted onto the ends of two adjacent pipe sections 3 to connect the two adjacent pipe sections 3. Each pipe section 3 is provided with an oil production section. It is understood that the negative pressure pipeline 2 can adopt an integrated structure or a split structure. Due to the variable and diverse extraction environments, the adaptability of the integrated structure of the negative pressure pipeline 2 is less than that of the split structure. Therefore, in this technical solution, the negative pressure pipeline 2 adopts a split structure. The negative pressure pipeline 2 includes multiple pipe sections 3 and multiple elastic sleeves. The multiple pipe sections 3 are arranged along their length. The multiple elastic sleeves are fitted onto the ends of two adjacent pipe sections 3 to connect the two adjacent pipe sections 3, thereby forming the negative pressure channel. Each pipe section 3 is provided with an oil production section to accelerate the oil extraction efficiency of the negative pressure pipeline 2.

[0027] Further, please refer to Figure 2 and Figure 4 The negative pressure pipeline 2 has an oil inlet end; the negative pressure pipeline 2 also includes multiple extraction end pieces 5 and multiple horizontal well gaps 6; the multiple extraction end pieces 5 are respectively sleeved on multiple sections of pipe 3, and each extraction end piece 5 is located at the end of the section of pipe 3 near the oil inlet end. The extraction end piece 5 is provided with multiple inclined openings 51 that communicate with the section of pipe 3 for underground crude oil extraction and transportation; the multiple horizontal well gaps 6 are provided corresponding to each of the inclined openings 51 to improve the fluidity of underground crude oil. Understandably, for the sake of reliable oil extraction, the pipe section 3 cannot directly pump oil; instead, the extraction end piece 5 is required to pump oil while protecting the pipe section 3. Furthermore, the extraction end piece 5 is also provided with an inclined channel 51 for communicating with the pipe section 3. Oil enters the pipe section 3 through the inclined channel 51 and is extracted by the negative pressure pipeline 2. In addition, a horizontal well gap 6 is correspondingly provided outside each inclined channel 51. The horizontal well gap 6 is used to improve the fluidity of underground oil and further accelerate the extraction speed of the negative pressure pipeline 2.

[0028] Further, please refer to Figure 4The negative pressure pipeline 2 also includes a positioning shaft seat 7, which is sleeved on a plurality of the section pipes 3. An elastic element 71 is provided between the inner side wall of the positioning shaft seat 7 and the outer side wall of the section pipe 3 so that the center of the section pipe 3 is positioned on the positioning shaft seat 7. Understandably, due to the negative pressure, the negative pressure pipeline 2 will violently shake or twist and deform during the oil extraction process. This will greatly affect the stability of the oil extraction by the oil thermal extraction mechanism 1. Therefore, in order to avoid the negative pressure pipeline 2 twisting and deforming violently during oil extraction, the negative pressure pipeline 2 also includes a positioning shaft seat 7. Multiple positioning shaft seats 7 are provided, each corresponding to one of the section pipes 3, so that the positioning shaft seat 7 is sleeved on multiple section pipes 3. An elastic element 71 is provided between the inner side wall of the positioning shaft seat 7 and the outer side wall of the section pipe 3. When the section pipe 3 twists in one direction within the positioning shaft seat 7, the elastic element 71 in the other direction restricts the twisting deformation of the section pipe 3 based on the positioning shaft seat 7, thereby positioning the center of the section pipe 3 on the positioning shaft seat 7.

[0029] Further, please refer to Figure 4 and Figure 5 The negative pressure pipeline 2 also includes a vibrator 8 fitted onto the negative pressure pipeline 2 to vibrate it. It is understood that during the initial extraction of oil, it contains numerous impurities and its liquid properties are excessively viscous. During the oil extraction process, the oil may become blocked within the segment 3, slowing down or stopping the pumping speed of the oil thermal extraction and delivery mechanism 1. Therefore, at least one vibrator 8 needs to be fitted onto the negative pressure pipeline 2 to drive vibration, thereby assisting in the flow promotion of the segment 3 in water-bearing oilfields. It is understood that multiple vibrators 8 can be provided. For protection, the vibrator 8 is installed within the alignment sleeve, corresponding to each segment... Both ends of the tube 3 are equipped with vibrators; simultaneously, the vibrators 8 fitted at both ends of the tube 3 can drive the tube 3 to vibrate with one of them, or both can drive it to vibrate together. They can also accurately locate where there is a blockage, and the vibration of the vibrator 8 at the corresponding position can specifically promote the flow of water or oil in a specific area, thereby improving the efficiency of fluid movement. Moreover, it is effective in solving the problem of sediment or blockage in specific areas, is more flexible, and can better cope with different geological conditions and well challenges. It can better overcome the fluid flow problem in water-bearing oilfields, improve oil production efficiency, reduce production costs, and reduce environmental impact.

[0030] Further, please refer to Figure 5The vibrating tube device 8 includes an outer shaft frame 81, a guide sleeve 82, and a connecting member 83. Multiple air chambers 811 are radially distributed along the inner circumference of the outer shaft frame 81, and each air chamber 811 is slidably equipped with a sealing plug 8111. Each air chamber 811 also has an air inlet 8112 and an air outlet 8113, with each inlet 8112 and outlet 8113 independently supplying and venting air. The guide sleeve 82 is disposed within the outer shaft frame 81, and the section tube 3 is slidably disposed within the guide sleeve 82. One end of the connecting member 83 is connected to the sealing plug 8111, and the other end is connected to the guide sleeve 82. Understandably, in order to achieve the vibration drive of the vibrator 8 on the section tube 3 and increase the flowability of oil in the section tube 3, the vibrator 8 is specifically configured including the outer shaft frame 81, the guide sleeve 82, and the connector 83; the vibrator 8 is sleeved on the section tube 3 by the guide sleeve 82, the outer shaft frame 81 is circumferentially arranged on the outside of the guide sleeve 82, and multiple air chambers 811 are radially distributed along the inner circumference of the outer shaft frame 81, each of which is slidably provided with a sealing plug 8111; the air chamber 811 is also provided with an air inlet 8112 and an air outlet 8113, each of which independently supplies and exhausts air, and the guide sleeve 82 is also provided with a sealing plug 8111. The connecting member 83 is provided between the sleeve 82 and the outer shaft frame 81 for connection; wherein, the positioning shaft seat 7 is embedded in the stratum, and by adjusting the air pressure of each air chamber 811 in the outer shaft frame 81, the guide sleeve 82 can be adjusted and driven accordingly, or swing left and right or rotate in a circle; when the guide sleeve 82 swings left and right, one of the air chambers 811 continuously maximizes gas extraction and discharge, while the opposite air chamber 811 synchronously maximizes gas extraction and discharge, and the remaining air chambers 811 assist in air pressure adjustment; when the guide sleeve 82 rotates in a circle, the air pressure in each air chamber 811 is successively adjusted high and low.

[0031] In addition, please refer to Figure 4 and Figure 6 An internal heat-collecting pipe 31 is also installed inside the pipe section 3. The internal heat-collecting pipe 31 is positioned corresponding to the oil extraction section to absorb the heat from the underground crude oil extracted into the pipe section 3. It is understood that the heat distribution of underground oil is uneven during extraction. If the heat is not absorbed in time during the extraction process, the heat contained in the oil will damage the components of the oil-heat extraction mechanism 1, thereby affecting the efficiency of oil extraction. Furthermore, wasting this heat through radiation is also a waste of resources. Therefore, the internal heat-collecting pipe 31 is installed inside the pipe section 3 used for oil extraction to absorb the oil passing through the pipe section 3, thereby protecting the oil-heat extraction mechanism 1, improving heat extraction efficiency, and absorbing and utilizing the heat contained in the oil.

[0032] Further, please refer to Figures 6 to 7 The internal heat collection pipe 31 includes multiple outer pipe bodies 311, multiple inner partition plates 312, and multiple flow dampers 313; the multiple outer pipe bodies 311 are sequentially spliced ​​along the extension direction; each outer pipe body 311 has multiple external protrusions 3111 on its outer side wall; the multiple inner partition plates 312 are fixed inside the outer pipe bodies 311, and the inner partition plates 312 divide the inner part of the outer pipe body 311 into a first water supply chamber 3112, a second water supply chamber 3113, and a return water chamber 3114; the multiple flow dampers 313 are used to control the water flow velocity inside the outer pipe body 311; wherein, each flow damper 313 is correspondingly arranged in the first water supply chamber 3112 and / or the second water supply chamber 3113. Understandably, in order to ensure that the oil absorbs heat in a timely manner during extraction to protect the oil-heat extraction and delivery mechanism 1 and improve its heat extraction efficiency, the inner heat extraction pipe 31 is specifically configured with multiple outer pipe bodies 311, multiple inner partition plates 312, and multiple flow buffers 313. The multiple outer pipe bodies 311 are sequentially spliced ​​together along the extension direction, that is, the inner heat extraction pipe 31 is formed by sequentially splicing multiple outer pipe bodies 311 along the length direction, and each outer pipe body 311 has multiple external protrusions on its outer side wall. 3111, the outer protrusion 3111 is provided to increase the outer surface area of ​​the outer pipe body 311, thereby increasing the contact area between the oil and the inner heat collection pipe 31, and thus improving the heat collection efficiency of the inner heat collection pipe 31; the multiple inner partition plates 312 are respectively fixed inside the outer pipe body 311, and the inner partition plates 312 divide the outer pipe body 311 into the first water delivery chamber 3112, the second water delivery chamber 3113, and the return water chamber 3114; the multiple flow dampers 313 are used to control the flow inside the outer pipe body 311. Water flow velocity; wherein, each of the aforementioned flow dampers 313 is correspondingly disposed within the first water delivery chamber 3112 or the second water delivery chamber 3113, thus, because the water flow paths in the first water delivery chamber 3112 and the second water delivery chamber 3113 are different; in areas rich in crude oil heat, the complexity of the water flow path can be increased, allowing the water source to fully absorb heat, while in areas with poor crude oil heat, the water source passes through quickly, reducing heat dissipation; in a preferred embodiment, the return water chamber 3114 occupies the cross-sectional area of ​​the outer pipe body 311. Half of the outer pipe body 311 is located in the first water delivery chamber 3112, which occupies three-eighths of the cross-sectional area of ​​the outer pipe body 311. Thus, water is pumped at constant pressure through the water pipe while oil is being extracted. The water source passes sequentially through the first water delivery chamber 3112 and the second water delivery chamber 3113 on the outer pipe body 311. When it reaches the end of the oil extraction point, water is delivered through the return water chamber 3114. At this time, the water delivery chamber and the return water chamber 3114 are connected to form a water source loop, realizing circulating heat delivery and improving heat extraction efficiency.

[0033] In addition, please refer to Figure 8The internal heat pipe 31 is further equipped with a flow controller 314, which includes an inlet port and an outlet port, an inner pipe 3141, a diversion port 3142, a flow-blocking shaft 3143, a flow-cutting ring 3144, and a shaft collar 3145. The inner pipe 3141 extends along the water flow direction and is slidably installed, with a spring 31411 sleeved on its periphery near the outlet port. The diversion port 3142 is located on the side of the flow controller 3141 opposite to the inner pipe 3141. The flow-blocking shaft 3143 is located on the inner pipe 3141. The inner pipe 3141 is partially blocked near the water inlet port. The flow-blocking ring 3144 is sleeved on the inner pipe 3141 near the water inlet port. The flow controller 314 is also provided with the shaft ring 3145 to cooperate with the flow-blocking ring 3144 to control the flow of water inside the flow controller 314. The water outlet direction of the inner pipe 3141 corresponds to the first water delivery chamber 3112, and the water outlet direction of the diversion port 3142 corresponds to the second water delivery chamber 3113.Understandably, in order to enable the internal heat collection pipe 31 to allow most of the water to flow into the flow buffer 313 for centralized regional heat collection in high-heat areas, and to allow most of the water to quickly pass through the first water delivery chamber 3112 and the second water delivery chamber 3113 in low-heat areas, avoiding excessive stagnation in low-heat areas and heat loss due to diffusion, the internal heat collection pipe 31 is also equipped with the flow controller 314. The specific configuration of the flow controller 314 includes the inlet port and the outlet port, the inner pipe 3141, the diversion port 3142, the flow-blocking shaft 3143, the flow-cutting ring 3144, and the shaft ring 3145. The inner tube 3141 extends along the water flow direction and is slidably installed. A spring 31411 is sleeved on the periphery near the outlet port. The diversion port 3142 is located on the side of the flow controller 314 opposite to the inner tube 3141. The flow-blocking shaft 3143 is located on the side of the inner tube 3141 near the inlet port to partially block the inner tube 3141. The flow-cutting ring 3144 is sleeved on the side of the inner tube 3141 near the inlet port. The flow controller 314 also has a shaft ring 3145 to cooperate with the flow-cutting ring 3144 to control the water flow inside the flow controller 314. The water outlet direction of the inner pipe 3141 corresponds to the first water delivery chamber 3112, and the water outlet direction of the diversion port 3142 corresponds to the second water delivery chamber 3113. Therefore, the diversion port 3142 on the flow controller 314 and the inner pipe 3141 are always in an open state. When the inner pipe 3141 is pushed by water pressure, the flow-blocking shaft 3143 can relatively disengage from the inner pipe 3141. At this time, the flow-cutting ring 3144 and the shaft ring 3145 approach each other, thereby achieving control of the water flow rate of the diversion port 3142 and the inner pipe 3141, that is, controlling the water source to enter the first water delivery chamber 3112. The flow rate of the first water delivery chamber 3112 and the second water delivery chamber 3113 is adjusted so that in the high-heat zone, most of the water can be fed into the flow buffer 313 for centralized regional heat collection, while in the low-heat zone, most of the water quickly passes through the first water delivery chamber 3112 and the second water delivery chamber 3113 to avoid excessive stagnation in the low-heat zone; wherein, in order to control the flow controller 314 in each of the outer pipe bodies 311 to effectively divert the flow and regulate the flow rate of the inner pipe 3141, the elastic strength of the spring 31411 in each of the flow controller 314 can be changed so that the spring 31411 is compressed accordingly when the water pumping pressure in each of the outer pipe bodies 311 reaches the predetermined value.

[0034] Further, please refer to Figure 6The flow buffer 313 is also equipped with a one-way flow channel 3131, which is arranged along the extension direction of the section pipe 3 and connected to the return water chamber 3114 to collect information on the underground heat distribution. It is understood that the heat distribution of underground oil is uneven, requiring priority to collect information on the underground heat distribution before using a suitable pressure pump to deliver water. This allows for flow control of the two branches on the flow controller 314 within each section of the outer pipe 311, enabling concentrated heat collection in high-heat areas through the flow buffer 313, with most of the water quickly returning through the one-way flow channel 3131. In low-heat areas, the water passes through quickly, reducing stagnation and preventing the waste of collected heat.

[0035] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An oil and heat co-extraction system, characterized in that, include: An oil and heat recovery mechanism includes a negative pressure pipeline comprising multiple pipe sections arranged along its length. An oil extraction section is formed on the negative pressure pipeline, and negative pressure is created within the pipeline to extract oil from the oil extraction section. An inner heat extraction pipe is also sleeved within each pipe section, corresponding to the oil extraction section, to absorb heat from the underground crude oil extracted into the pipe section. The injection mechanism includes multiple injection pipes, which are evenly distributed along the circumference of the negative pressure pipe and spaced apart from it. Each of the aforementioned delivery pipes is equipped with a jet section for injecting supercritical carbon dioxide into the petroleum; the internal heat recovery pipe includes: Multiple outer tubes are sequentially spliced ​​together along the extension direction; each outer tube has multiple protruding edges on its outer side wall. Multiple inner partition plates are fixed inside the outer pipe, dividing the outer pipe into a first water supply chamber, a second water supply chamber, and a return water chamber; and, Multiple flow dampers are used to control the water flow velocity inside the outer pipe body; wherein each of the flow dampers is correspondingly disposed in the first water delivery chamber and / or the second water delivery chamber.

2. The oil and heat recovery system as described in claim 1, characterized in that, The negative pressure pipeline includes multiple elastic bushings, which are sleeved onto the ends of two adjacent sections to connect the two adjacent sections. Each of the aforementioned pipe sections is equipped with an oil production section.

3. The oil and heat recovery system as described in claim 2, characterized in that, The negative pressure pipeline has an oil inlet end; The negative pressure pipeline also includes: Multiple extraction end pieces are respectively fitted onto multiple sections of pipe, each extraction end piece being located at the end of the pipe section closest to the oil inlet. Each extraction end piece has multiple inclined openings that connect to the inside of the pipe section for underground crude oil extraction and transportation; and... Multiple horizontal well gaps are provided, corresponding to each of the aforementioned inclined well openings, to improve the fluidity of underground crude oil.

4. The oil and heat co-extraction system as described in claim 1, characterized in that, The negative pressure pipeline also includes: A positioning shaft seat is sleeved on multiple sections of tube. An elastic element is provided between the inner side wall of the positioning shaft seat and the outer side wall of the section of tube so that the center of the section of tube is positioned on the positioning shaft seat.

5. The oil and heat recovery system as described in claim 1, characterized in that, The negative pressure pipeline also includes a vibrator fitted onto the negative pressure pipeline to vibrate the negative pressure pipeline.

6. The oil and heat co-extraction system as described in claim 5, characterized in that, The vibrating tube includes: The outer shaft frame has multiple air chambers radially distributed along its inner circumference, and each air chamber is slidably equipped with a sealing plug; the air chamber is also provided with an air inlet and an air outlet, and each air inlet and air outlet is independently supplied with and exhausts air. A guide sleeve is disposed within the outer shaft bracket, and the section tube is slidably disposed within the guide sleeve; and, The connector has one end connected to the sealing plug and the other end connected to the guide sleeve.

7. The oil and heat recovery system as described in claim 1, characterized in that, The flow slower is also provided with a one-way flow channel, which is arranged along the extension direction of the section pipe and connected to the return water chamber to collect information on the underground thermal distribution.

8. The oil and heat recovery system as described in claim 1, characterized in that, The internal heat pipe is also equipped with a flow controller, which includes: Inlet and outlet ports; The inner tube extends along the direction of water flow and is slidably installed, with a spring sleeved on the periphery near the outlet port; The diversion port is located on the side of the flow controller relative to the inner tube; A flow-blocking shaft is positioned on the side of the inner tube near the water inlet port to partially block the inner tube; and, A flow-blocking ring is fitted onto the inner tube near the water inlet port. The flow controller also has a shaft ring to cooperate with the flow-blocking ring in order to control the flow of water inside the flow controller. Wherein, the water outlet direction of the inner tube corresponds to the first water delivery chamber, and the water outlet direction of the diversion port corresponds to the second water delivery chamber.

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