Novel oilfield well site heat source heating device
Patent Information
- Application Number
- CN202522245795.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-23
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-10-23
AI Technical Summary
因此，现有井场的热源存在的问题是：一方面是大部分生产作业采用电加热作为热源，其耗电量大，电费成本较高；另一方面，现有的配电线路将无法满足石油开发需求，区块内开发需进行电网扩容，还需要进行高压线敷设，投资成本较大；另外，在石油生产过程中水井压驱、油井热洗、降粘吞吐作业等用热需求大，井筒、高架罐加热耗电量逐年增加，采用车载拉水模式，运维成本更高
[0014] The beneficial effects of this utility model are as follows: By installing a primary heat exchanger next to the power plant, the 270℃, 1.0MPa steam from the power plant enters the primary heat exchanger to generate 90℃ condensate, which then enters the condensate tank. The softened water from the secondary side of the heat exchanger is delivered to the surrounding oilfield well site via a long-distance pipeline. The pipeline then splits into three routes, which enter the elevated tank and the secondary plate heat exchanger for heat exchange, respectively. This not only solves the problem of high power consumption and high electricity costs associated with existing electric heating as a heat source, but also eliminates the need for grid expansion and high-voltage line laying to meet greater heat demand. Furthermore, it avoids the need to construct new steam pipelines and lay them to the well site using a low-support method, thus meeting the heat demand of the wellbore and elevated tank through steam mixing. This reduces investment, meets the heat source needs of the oil well site, and fully utilizes the superheated steam from the nearby power plant, thereby reducing energy consumption.
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Figure CN224757587U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of petroleum development technology, and in particular to a novel oilfield well site heat source heating device. Background Technology
[0002] In oil extraction blocks, there are many scenarios that require heat sources, such as wellbore heating, overhead tank heating, and well washing heat. Wellbore heating refers to heating crude oil to reduce its viscosity, improve its fluidity, and maintain normal production. Overhead tank heating refers to reducing the viscosity of crude oil in the tank and improving its fluidity to meet the demand for oil extraction. Well washing heat and oil well operations refer to reducing the difficulty of lifting oil due to its viscosity during oil extraction and production, and reducing the impact of reservoir damage during operations.
[0003] Wellbore heating primarily employs closed-loop heating, typically using a hydraulic circulation system with hot water produced by an electric boiler as the heat source. Elevated tank heating also utilizes electric heating rods and heating plates built into the tank for electric heating. Well washing heat is categorized into wellbore hot washing, operational well washing, and abnormal well treatment, employing "energy storage hot water trucks," "cement trucks + water tankers," and "cement trucks + energy storage hot water trucks," respectively. Therefore, the existing heat sources at well sites present several problems: firstly, most production operations rely on electric heating, resulting in high electricity consumption and costs; secondly, existing power distribution lines cannot meet the demands of oil development, requiring grid expansion and high-voltage line installation within the block, leading to significant investment costs; furthermore, the high heat demand during oil production processes, such as water well hydraulic drive, oil well hot washing, and viscosity reduction injection, leads to a year-on-year increase in electricity consumption for wellbore and elevated tank heating, further increasing maintenance costs due to the use of truck-mounted water transport.
[0004] For oil wells near power plants, the superheated steam from the power plant could be used, for example, by laying new steam pipelines to the well site and mixing the steam to meet the heat demand of the wellbore and elevated tank. However, the problem is that the new steam pipelines need to be laid with low supports, which involves land acquisition. On the one hand, the cost is high, and on the other hand, negotiation is difficult. Utility Model Content
[0005] The purpose of this invention is to address the aforementioned deficiencies in the existing technology by providing a novel oilfield well site heat source heating device. This invention utilizes superheated steam from a power plant, indirectly exchanges heat through a plate heat exchanger, adds a heat exchange system, and then delivers hot water to the well site via a directly buried pipeline. This solves the problem of low-support laying method, reduces costs, and meets the heat source needs of the oil well site.
[0006] The present invention discloses a novel oilfield well site heat source heating device, the technical solution of which includes a steam input pipe (1), a primary heat exchanger (2), a condensate tank (3), a secondary heat exchanger (5), an elevated tank water supply pipeline (6), a wellbore water supply pipeline (7), a wellbore return water pipeline (8), an elevated tank return water pipeline (9), a well washing pipeline (10), and a circulating water pump (13). The shell-side inlet of the primary heat exchanger (2) is connected to the power plant steam source through the steam input pipe (1), and the shell-side outlet of the primary heat exchanger (2) is connected to the condensate tank (3) through a pipeline. (2) The tube side outlet is connected to the well site via the delivery pipeline (15) and then splits into three routes. One route is delivered to the elevated tank water supply pipeline (6), the second route is delivered to the well washing pipeline (10), and the third route is delivered to the shell side inlet of the secondary heat exchanger (5). The shell side outlet of the secondary heat exchanger (5) is connected to the tube side inlet of the primary heat exchanger (2) via the return pipeline (16) and the circulating water pump (13). The tube side outlet of the secondary heat exchanger (5) is sent into the well via the well water supply pipeline (7). The return water after heating in the well is connected to the tube side inlet of the secondary heat exchanger (5) via the well return water pipeline (8).
[0007] Preferably, the input end of the condensate tank (3) is connected to a water softening device (11) via a pipeline, and the softened tap water is sent into the condensate tank (3) for water replenishment.
[0008] Preferably, one outlet of the condensate tank (3) is connected to the elevated tank water supply pipeline (6) via a pipeline and a water supply pump (4); the other outlet of the condensate tank (3) is connected to the return pipeline (16) via a pipeline and a water replenishment pump (12).
[0009] Preferably, a well return water pump (14) is installed on the pipeline between the well return water pipeline (8) and the shell-side outlet of the secondary heat exchanger (5).
[0010] Preferably, the first-stage heat exchanger (2) and the second-stage heat exchanger (5) are both fully welded plate heat exchangers.
[0011] Preferably, a first control valve (a1) is installed on the pipeline between the above-mentioned water supply pump (4) and the condensate tank (3), and a seventh control valve (a7) is installed on the pipeline between the water supply pump (12) and the condensate tank (3).
[0012] Preferably, the end of the above-mentioned delivery pipeline (15) is divided into three branch pipelines, and a second control valve (a2), a third control valve (a3) and a fourth control valve (a4) are installed thereon respectively.
[0013] Preferably, the above-mentioned elevated tank return water line (9) is connected to the return line (16) through a line and a sixth control valve (a6), and the shell-side outlet of the secondary heat exchanger (5) is connected to the return line (16) through a line and a fifth control valve (a5).
[0014] The beneficial effects of this utility model are as follows: By installing a primary heat exchanger next to the power plant, the 270℃, 1.0MPa steam from the power plant enters the primary heat exchanger to generate 90℃ condensate, which then enters the condensate tank. The softened water from the secondary side of the heat exchanger is delivered to the surrounding oilfield well site via a long-distance pipeline. The pipeline then splits into three routes, which enter the elevated tank and the secondary plate heat exchanger for heat exchange, respectively. This not only solves the problem of high power consumption and high electricity costs associated with existing electric heating as a heat source, but also eliminates the need for grid expansion and high-voltage line laying to meet greater heat demand. Furthermore, it avoids the need to construct new steam pipelines and lay them to the well site using a low-support method, thus meeting the heat demand of the wellbore and elevated tank through steam mixing. This reduces investment, meets the heat source needs of the oil well site, and fully utilizes the superheated steam from the nearby power plant, thereby reducing energy consumption. Attached Figure Description
[0015] Figure 1 This is a connection diagram of Embodiment 1 of this utility model; Figure 2 This is a connection diagram of Embodiment 2 of this utility model; In the diagram above: Steam input pipe 1, primary heat exchanger 2, condensate tank 3, feed water pump 4, secondary heat exchanger 5, elevated tank water supply pipeline 6, well water supply pipeline 7, well return water pipeline 8, elevated tank return water pipeline 9, well washing pipeline 10, softened water device 11, makeup water pump 12, circulating water pump 13, well return water pump 14, delivery pipeline 15, return pipeline 16, first control valve a1, second control valve a2, third control valve a3, fourth control valve a4, fifth control valve a5, sixth control valve a6, seventh control valve a7. Detailed Implementation
[0016] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0017] Example 1, referring to Figure 1This utility model discloses a novel oilfield well site heat source heating device, comprising a steam input pipe 1, a primary heat exchanger 2, a condensate tank 3, a secondary heat exchanger 5, an elevated tank water supply pipeline 6, a wellbore water supply pipeline 7, a wellbore return water pipeline 8, an elevated tank return water pipeline 9, a well washing pipeline 10, and a circulating water pump 13. The shell-side inlet of the primary heat exchanger 2 is connected to a power plant steam source via the steam input pipe 1, and the shell-side outlet of the primary heat exchanger 2 is connected to the condensate tank 3 via a pipeline. The tube-side of the primary heat exchanger 2... The outlet is connected to the well site via pipeline 15, which splits into three routes: one route delivers water to the elevated tank supply pipeline 6, the second route delivers water to the well washing pipeline 10, and the third route delivers water to the shell-side inlet of the secondary heat exchanger 5. The shell-side outlet of the secondary heat exchanger 5 is connected to the tube-side inlet of the primary heat exchanger 2 via return pipeline 16 and circulating water pump 13. The tube-side outlet of the secondary heat exchanger 5 is fed into the wellbore via wellbore supply pipeline 7. The return water heated in the wellbore is connected to the tube-side inlet of the secondary heat exchanger 5 via wellbore return water pipeline 8.
[0018] The input end of the condensate tank 3 is connected to the water softening device 11 via a pipeline. The softened tap water is then fed into the condensate tank 3 for replenishment. The water softening device 11 is produced by a sodium ion exchanger, which is existing technology and will not be described in detail here.
[0019] The outlet on one side of the condensate tank 3 is connected to the water supply pipeline 6 of the elevated tank via a pipeline and a water pump 4.
[0020] A well return water pump 14 is installed on the pipeline between the well return water pipeline 8 and the shell-side outlet of the secondary heat exchanger 5.
[0021] The aforementioned primary heat exchanger 2 and secondary heat exchanger 5 are both fully welded plate heat exchangers.
[0022] A first control valve a1 is installed on the pipeline between the aforementioned water pump 4 and the condensate tank 3.
[0023] The end of the aforementioned delivery pipeline 15 is divided into three branch pipelines, and a second control valve a2, a third control valve a3 and a fourth control valve a4 are installed respectively.
[0024] The aforementioned elevated tank return water pipeline 9 is connected to the return pipeline 16 via a pipeline and the sixth control valve a6, and the shell-side outlet of the secondary heat exchanger 5 is connected to the return pipeline 16 via a pipeline and the fifth control valve a5.
[0025] In use, this utility model involves installing a primary heat exchanger 2 next to the power plant. Superheated steam from the power plant is connected to the shell-side inlet of the primary heat exchanger 2 via a steam input pipe 1. The 270°C, 1.0MPa hot steam, after heat exchange in the primary heat exchanger 2, cools to approximately 90°C and then returns to the condensate tank 3. Hot water at 120°C from the tube-side outlet of the primary heat exchanger 2 is connected to the surrounding oilfield well site via a long-distance pipeline 15. The pipeline then splits into three routes: one route delivers water directly to the elevated tank water supply pipeline 6 for use in the elevated tank. The elevated tank contains coils that exchange heat with the crude oil to heat and maintain its temperature. An electric heater serves as an emergency backup. The second route delivers water to the well-washing pipeline. 10. The water is directly supplied for well washing. The condensate produced after steam heat exchange can be used as the source of well washing water. Its temperature after heat exchange is about 90 degrees Celsius, which replaces the existing truck-hauled water washing. The third route is delivered to the shell-side inlet of the secondary heat exchanger 5. The tube-side outlet of the secondary heat exchanger 5 is sent into the wellbore through the wellbore water supply pipeline 7. The return water after heating in the wellbore is connected to the tube-side inlet of the secondary heat exchanger 5 through the wellbore return water pipeline 8, which replaces the existing hydraulic circulation heating device. At the same time, the heating device serves as an emergency backup, thereby meeting the heating needs of the wellbore. At the same time, it avoids the high cost problem of using the low support laying method, meets the heat source needs of the oil well site, makes full use of the superheated steam of the power plant near the oil well, and reduces energy consumption.
[0026] Example 2: A novel oilfield well site heat source heating device mentioned in this utility model includes a steam input pipe 1, a primary heat exchanger 2, a condensate tank 3, a secondary heat exchanger 5, an elevated tank water supply pipeline 6, a wellbore water supply pipeline 7, a wellbore return water pipeline 8, an elevated tank return water pipeline 9, a well washing pipeline 10, and a circulating water pump 13. The shell-side inlet of the primary heat exchanger 2 is connected to a power plant steam source via the steam input pipe 1, and the shell-side outlet of the primary heat exchanger 2 is connected to the condensate tank 3 via a pipeline. The tube-side outlet is connected to the well site via the delivery pipeline 15, which splits into three routes: one route delivers water to the elevated tank supply pipeline 6, the second route delivers water to the well washing pipeline 10, and the third route delivers water to the shell-side inlet of the secondary heat exchanger 5. The shell-side outlet of the secondary heat exchanger 5 is connected to the tube-side inlet of the primary heat exchanger 2 via the return pipeline 16 and the circulating water pump 13. The tube-side outlet of the secondary heat exchanger 5 is fed into the wellbore via the wellbore supply pipeline 7. The return water heated in the wellbore is connected to the tube-side inlet of the secondary heat exchanger 5 via the wellbore return water pipeline 8.
[0027] The difference from Example 1 is: Reference Figure 2 In this embodiment, the outlet on the other side of the condensate tank 3 is connected to the return pipeline 16 via a pipeline and the water supply pump 12. A seventh control valve a7 is installed on the pipeline between the water supply pump 12 and the condensate tank 3, so that the water in the condensate tank 3 can be sent back to the primary heat exchanger 2 for continued use as needed.
[0028] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent transformations made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.
Claims
1. A novel oilfield well site heat source heating device, characterized in that: The system includes a steam input pipe (1), a primary heat exchanger (2), a condensate tank (3), a secondary heat exchanger (5), a raised tank water supply line (6), a well water supply line (7), a well return line (8), a raised tank return line (9), a well washing line (10), and a circulating water pump (13). The shell-side inlet of the primary heat exchanger (2) is connected to the power plant steam source via the steam input pipe (1), and the shell-side outlet of the primary heat exchanger (2) is connected to the condensate tank (3) via a pipeline. The tube-side outlet of the primary heat exchanger (2) is connected to the power plant steam source via a delivery pipeline. 15) Connect to the well site and divide into three routes. One route is delivered to the elevated tank water supply pipeline (6), the second route is delivered to the well washing pipeline (10), and the third route is delivered to the shell-side inlet of the secondary heat exchanger (5). The shell-side outlet of the secondary heat exchanger (5) is connected to the tube-side inlet of the primary heat exchanger (2) through the return pipeline (16) and the circulating water pump (13). The tube-side outlet of the secondary heat exchanger (5) is sent into the well through the well water supply pipeline (7). The return water after heating in the well is connected to the tube-side inlet of the secondary heat exchanger (5) through the well return water pipeline (8).
2. The novel oilfield well site heat source heating device according to claim 1, characterized in that: The input end of the condensate tank (3) is connected to the water softening device (11) through a pipeline, and the softened tap water is sent into the condensate tank (3) for water replenishment.
3. The novel oilfield well site heat source heating device according to claim 2, characterized in that: One side outlet of the condensate tank (3) is connected to the elevated tank water supply pipeline (6) via a pipeline and a water supply pump (4); the other side outlet of the condensate tank (3) is connected to the return pipeline (16) via a pipeline and a water replenishment pump (12).
4. The novel oilfield well site heat source heating device according to claim 3, characterized in that: A wellbore return water pump (14) is installed on the pipeline between the wellbore return water pipeline (8) and the shell-side outlet of the secondary heat exchanger (5).
5. The novel oilfield well site heat source heating device according to claim 4, characterized in that: The primary heat exchanger (2) and the secondary heat exchanger (5) are both fully welded plate heat exchangers.
6. The novel oilfield well site heat source heating device according to claim 4, characterized in that: A first control valve (a1) is installed on the pipeline between the water supply pump (4) and the condensate tank (3), and a seventh control valve (a7) is installed on the pipeline between the water replenishment pump (12) and the condensate tank (3).
7. The novel oilfield well site heat source heating device according to claim 6, characterized in that: The end of the delivery pipeline (15) is divided into three branch pipelines, and a second control valve (a2), a third control valve (a3) and a fourth control valve (a4) are installed thereon respectively.
8. The novel oilfield well site heat source heating device according to claim 7, characterized in that: The elevated tank return water line (9) is connected to the return line (16) via a line and a sixth control valve (a6), and the shell-side outlet of the secondary heat exchanger (5) is connected to the return line (16) via a line and a fifth control valve (a5).