Skid-mounted equipment for heating crude oil at well group station

Abstract

The invention is applicable to the technical field of crude oil heating, and provides skid-mounted equipment for heating crude oil at a well group site, the skid-mounted equipment comprises a base, a control box, a crude oil heat exchange tank and a heating tank, a heat exchange coil is arranged in the crude oil heat exchange tank, the heating tank is communicated with the heat exchange coil, fixing frames are fixed on two sides of the base, and two supporting rods are hinged in the fixing frames; rollers are installed at the bottoms of the supporting rods, sliding sleeves sleeve the supporting rods, a lead screw is rotationally installed on the fixing frame, push rods are hinged to the two ends of the lead screw through outer sleeves, and the ends, away from the outer sleeves, of the push rods are hinged to the sliding sleeves; a worm gear is fixed to the middle of the lead screw, and a worm meshed with the worm gear penetrates through the fixing frame. Accurate control and constant-temperature maintenance of the temperature of the crude oil are achieved, the high-condensation-point crude oil is effectively prevented from being solidified in the conveying and storage process, and the flowing smoothness of the crude oil is guaranteed. By accurately controlling the temperature of crude oil, accumulation of sediments at the bottom of the storage tank due to too low temperature is prevented, and the cleaning workload and downtime are reduced.

Description

Technical Field

[0001] This invention relates to the field of crude oil heating technology, and more specifically, to a skid-mounted device for heating crude oil at well sites. Background Technology

[0002] Currently, the heating systems for crude oil pipelines and storage tanks in oilfields mainly rely on gas-fired boilers. However, with the gradual depletion of natural gas resources, most oilfields face insufficient gas supply, directly leading to wax deposition during crude oil transportation and increased pressure at wellheads and pipelines, affecting the efficiency and safety of crude oil transportation. Furthermore, existing electric heating systems generally lack intelligent control, safety interlocks, and explosion-proof functions, resulting in additional energy consumption and numerous safety hazards. Specific problems include: the depletion of natural gas resources causing unstable operation of the heating system, affecting crude oil transportation; insufficient gas heating leading to wax deposition in crude oil, increased pipeline pressure, and increased transportation difficulty; and the lack of intelligent control, safety interlocks, and explosion-proof functions in existing electric heating systems, posing safety hazards and additional energy consumption.

[0003] To address the aforementioned problems, this invention proposes a skid-mounted device for heating crude oil at well sites. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a skid-mounted device for heating crude oil at well sites, which adopts electromagnetic heating technology and explosion-proof design to achieve precise control and constant temperature maintenance of crude oil, thereby improving the safety and economy of crude oil transportation and storage.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a skid-mounted device for heating crude oil at well sites, comprising a base and a control box, a crude oil heat exchange tank, and a heating tank fixed on the top of the base. The crude oil heat exchange tank is equipped with a heat exchange coil, and the output and input ends of the heating tank are both connected to the heat exchange coil. Fixed frames are fixed on both sides of the base, and two support rods are hinged inside the fixed frames. Rollers are installed at the bottom of the support rods, and sliding sleeves are fitted on the support rods.

[0007] A lead screw is rotatably installed inside the fixed frame and between the two support rods. Both ends of the lead screw are connected to an outer sleeve. A push rod is hinged to the end of the outer sleeve away from the lead screw, and the end of the push rod away from the outer sleeve is hinged to a sliding sleeve. A worm wheel coaxial with the lead screw is fixed in the middle of the lead screw. A worm that meshes with the worm wheel passes through the fixed frame. An adjusting wheel is fixed to the end of the worm that is outside the fixed frame.

[0008] As a preferred embodiment of the present invention, the crude oil heat exchange tank has a crude oil inlet at the top of one end and a crude oil outlet at the bottom of the other end. A support frame is fixed inside the crude oil heat exchange tank, and the heat exchange coil is arranged around the support frame. The outlet and inlet ends of the heat exchange coil both pass through both ends of the crude oil heat exchange tank and extend to the outside of the crude oil heat exchange tank.

[0009] As a preferred embodiment of the present invention, the output end of the heat exchange coil is connected to the input end of the circulation pump mounted on the base via a return pipe. The output end of the circulation pump is equipped with a two-position three-way solenoid valve via a conduit. The conduit is connected to one input end of the two-position three-way solenoid valve. The other input end of the two-position three-way solenoid valve is fixed with a water inlet pipe. The output end of the two-position three-way solenoid valve is connected to the input end of the heating tank via a water supply pipe. The input end of the heat exchange coil is connected to the output end of the heating tank via a water supply pipe equipped with a booster pump.

[0010] As a preferred embodiment of the present invention, the heating tank is composed of an inner tank and an outer tank. The inner tank is located inside the outer tank. Both ends of the inner tank are fixed with connecting pipes that communicate with the inner cavity of the inner tank. The connecting pipes pass through the outer tank and extend to the outside of the outer tank. The ends of the two connecting pipes located outside the outer tank are respectively connected to a water supply pipe and a water replenishment pipe.

[0011] As a preferred embodiment of the present invention, an electromagnetic heating coil is sleeved on the outside of the inner tank, an electromagnetic heating controller is fixed on the outer surface of the outer tank, a crude oil detection panel is fixed on the outer surface of the crude oil heat exchange tank, and an intelligent control motherboard is installed inside the control box.

[0012] As a preferred embodiment of the present invention, the electromagnetic heating coil is electrically connected to the intelligent control main board in the control box through the electromagnetic heating controller, and the circulating pump, two-position three-way solenoid valve, booster pump, and crude oil detection panel are all electrically connected to the intelligent control main board.

[0013] As a preferred embodiment of the present invention, the bottom of the base is fixed with a support frame made of several I-beams welded together, and the fixing frame is formed by channel steel welded onto the base.

[0014] The advantages of this invention are:

[0015] 1. This invention utilizes electromagnetic heating technology to achieve precise control and constant temperature maintenance of crude oil, effectively preventing high-pour-point crude oil from solidifying during transportation and storage, and ensuring smooth crude oil flow. Electromagnetic heating technology can uniformly heat crude oil, avoiding localized overheating, reducing crude oil viscosity, and thus improving the efficiency of crude oil transportation in pipelines. Precise temperature control prevents sediment buildup at the bottom of storage tanks due to excessively low temperatures, reducing cleaning workload and downtime.

[0016] 2. The skid-mounted equipment of this invention adopts an integrated design with a reasonable layout of components, facilitating maintenance and repair. The intelligent control system can monitor the equipment's operating status in real time, provide early warnings of potential faults, and reduce unplanned downtime. Explosion-proof design and stainless steel rock wool insulation improve the equipment's durability and safety, reduce equipment damage caused by environmental factors, and thus extend the equipment's service life.

[0017] 3. The adjustable support rods and rollers designed on both sides of the base of this invention make it more convenient to move or adjust the position of the equipment, improving its flexibility and applicability. Compared with traditional steam tracing, it not only saves 30-50% of energy but also produces no combustion exhaust emissions, meeting environmental protection requirements. In addition, its low-noise operation improves the working environment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a skid-mounted device for heating crude oil at well sites according to the present invention.

[0019] Figure 2 This is a structural schematic diagram from another perspective of the present invention.

[0020] Figure 3 This is the front view of the present invention.

[0021] Figure 4 This is a structural schematic diagram of the invention from the bottom view.

[0022] Figure 5 This is a schematic diagram of the structure of the fixed frame components of the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of a crude oil heat exchange tank.

[0024] Figure 7 This is a schematic diagram of the internal structure of a crude oil heat exchange tank.

[0025] Figure 8 This is a schematic cross-sectional view of the crude oil heat exchange tank.

[0026] Figure 9 This is a schematic diagram of the heating tank.

[0027] Figure 10 This is a schematic diagram of the cross-sectional structure of the heating tank.

[0028] Figure 11 This is a schematic diagram of the horizontal structure of the heating tank.

[0029] In the attached diagram: 1. Base; 2. Control box; 3. Crude oil heat exchange tank; 301. Heat exchange coil; 302. Support frame; 304. Crude oil detection panel; 4. Heating tank; 401. Inner tank; 402. Outer tank; 403. Connecting pipe; 404. Electromagnetic heating coil; 405. Electromagnetic heating controller; 5. Fixing frame; 6. Support rod; 7. Roller; 8. Sliding sleeve; 9. Lead screw; 10. Outer sleeve; 11. Push rod; 12. Worm gear; 13. Worm; 14. Adjusting wheel; 15. Return pipe; 16. Circulation pump; 17. Two-position three-way solenoid valve; 18. Water inlet pipe; 19. Water supply pipe; 20. Booster pump; 21. Water replenishment pipe. Detailed Implementation

[0030] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0031] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] A skid-mounted device for heating crude oil at a well site includes a base 1 and a control box 2, a crude oil heat exchange tank 3, and a heating tank 4 fixed on the top of the base 1. A support frame made of several H-beams is fixed to the bottom of the base 1. A fixing frame 5 is made of channel steel welded to the base 1. The output and input ends of the heating tank 4 are connected to the heat exchange coil 301. Fixing frames 5 are fixed on both sides of the base 1. Two support rods 6 are hinged inside the fixing frame 5. Rollers 7 are installed at the bottom of the support rods 6. Sliding sleeves 8 are fitted on the support rods 6.

[0034] The crude oil heat exchange tank 3 is equipped with a heat exchange coil 301. A crude oil inlet is opened at the top of one end of the crude oil heat exchange tank 3, and a crude oil outlet is opened at the bottom of the other end. A support frame 302 is fixed inside the crude oil heat exchange tank 3. The heat exchange coil 301 is arranged around the support frame 302. The outlet and inlet ends of the heat exchange coil 301 pass through both ends of the crude oil heat exchange tank 3 and extend to the outside of the crude oil heat exchange tank 3.

[0035] A lead screw 9 is rotatably installed inside the fixed frame 5 and between the two support rods 6. The lead screw 9 has two threads with opposite directions at both ends. Both ends of the lead screw 9 are connected to an outer sleeve 10. A push rod 11 is hinged to the end of the outer sleeve 10 away from the lead screw 9. The end of the push rod 11 away from the outer sleeve 10 is hinged to the sliding sleeve 8.

[0036] A worm gear 12 coaxial with the lead screw 9 is fixed in the middle of the lead screw 9. A worm 13 meshing with the worm gear 12 passes through the fixed frame 5. An adjusting wheel 14 is fixed at one end of the worm 13 located outside the fixed frame 5.

[0037] The output end of the heat exchange coil 301 is connected to the input end of the circulation pump 16 mounted on the base 1 via the return pipe 15. The output end of the circulation pump 16 is equipped with a two-position three-way solenoid valve 17 via a conduit. The conduit is connected to one of the input ends of the two-position three-way solenoid valve 17. The other input end of the two-position three-way solenoid valve 17 is fixed with a water inlet pipe 18. The output end of the two-position three-way solenoid valve 17 is connected to the input end of the heating tank 4 via the water supply pipe 19. The input end of the heat exchange coil 301 is connected to the output end of the heating tank 4 via the water supply pipe 21 on which the booster pump 20 is installed.

[0038] The heating tank 4 consists of an inner tank 401 and an outer tank 402. The inner tank 401 is located inside the outer tank 402. Both ends of the inner tank 401 are fixed with connecting pipes 403 communicating with the inner cavity of the inner tank 401. The connecting pipes 403 penetrate the outer tank 402 and extend to the outside of the outer tank 402. The ends of the two connecting pipes 403 located outside the outer tank 402 are respectively connected to the water inlet pipe 19 and the water supply pipe 21. An electromagnetic heating coil 404 is sleeved on the outside of the inner tank 401. An electromagnetic heating controller 405 is fixed on the outer surface of the outer tank 402. A crude oil detection panel 304 is fixed on the outer surface of the crude oil heat exchange tank 3. An intelligent control mainboard is installed inside the control box 2. The electromagnetic heating coil 404 is electrically connected to the intelligent control mainboard in the control box 2 through the electromagnetic heating controller 405. The circulating pump 16, the two-position three-way solenoid valve 17, the booster pump 20, and the crude oil detection panel 304 are all electrically connected to the intelligent control mainboard.

[0039] Example 1:

[0040] Please see Figures 1-11 Structural diagram; the present invention provides the following technical solution:

[0041] In this embodiment, the skid-mounted equipment has a base 1 welded from I-beams to ensure its stability. The control box 2 is fixed to the top of the base and houses a built-in intelligent control motherboard responsible for the intelligent control of the entire equipment. A heat exchange coil 301 is installed inside the crude oil heat exchange tank 3, and the coil is arranged around the support frame 302 to ensure heat exchange efficiency.

[0042] During the heating process, the intelligent control motherboard activates the electromagnetic heating controller 405, causing the electromagnetic heating coil 404 to heat the water in the heating tank 4. The heated water then enters the heat exchange coil 301 through the circulation pump 16 and the water inlet pipe 19, where it exchanges heat with the crude oil. The cooled water returns to the heating tank 4 through the return pipe 15 and the booster pump 20, forming a closed-loop circulation.

[0043] Crude oil enters the crude oil heat exchange tank 3 through the crude oil inlet, is heated by the heat exchange coil 301, and then flows out through the crude oil outlet. The crude oil detection panel 304 monitors the crude oil temperature in real time and feeds the data back to the intelligent control main board to adjust the heating power and ensure a constant crude oil temperature.

[0044] When the equipment needs to be moved, rotating the adjusting wheel 14 drives the worm gear 13 and worm wheel 12 to rotate, which in turn drives the lead screw 9 to rotate. The lead screw 9 pushes the sliding sleeve 8 to slide along the support rod 6 through the outer sleeve 10 and the push rod 11, so that the roller 7 installed at the bottom of the support rod 6 contacts the ground, facilitating the movement of the equipment.

[0045] This embodiment utilizes electromagnetic heating technology to achieve precise control and constant temperature maintenance of crude oil, effectively preventing high-pour-point crude oil from solidifying during transportation and storage, and ensuring smooth crude oil flow. Simultaneously, the intelligent control system can monitor equipment operating status in real time, providing early warnings of potential faults and reducing unplanned downtime. Explosion-proof design and stainless steel rock wool insulation enhance the equipment's durability and safety.

[0046] Example 2:

[0047] Based on Embodiment 1, this embodiment further optimizes the integrated design of the equipment. The layout of the components on the base 1 is more compact and reasonable. The control box 2 not only has a built-in intelligent control motherboard, but also integrates a fault diagnosis system, which can analyze the equipment's operating data in real time and detect and warn of potential faults in advance.

[0048] The heating tank 4 adopts a double-layer tank design, with high-efficiency insulation material filling the space between the inner tank 401 and the outer tank 402 to reduce heat loss. The electromagnetic heating coil 404 is tightly wound around the outside of the inner tank 401, and rapid and uniform heating is achieved through the electromagnetic heating controller 405.

[0049] Both the circulating pump 16 and the booster pump 20 are high-efficiency and energy-saving products, working in conjunction with a two-position three-way solenoid valve 17 to achieve precise control of water circulation. When the crude oil temperature reaches the set value, the intelligent control mainboard automatically adjusts the electromagnetic heating power to reduce energy consumption.

[0050] This embodiment, through integrated design, not only solves many problems of traditional heating methods but also improves the maintainability and ease of maintenance of the equipment. The energy-saving and environmentally friendly design concept makes the equipment more economical and efficient during operation.

[0051] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A skid-mounted device for heating crude oil at a well site, comprising a base (1) and a control box (2), a crude oil heat exchange tank (3), and a heating tank (4) fixed on the top of the base (1), wherein a heat exchange coil (301) is provided inside the crude oil heat exchange tank (3), and the output and input ends of the heating tank (4) are both connected to the heat exchange coil (301), characterized in that: The base (1) has fixed frames (5) on both sides. Two support rods (6) are hinged inside the fixed frames (5). Rollers (7) are installed at the bottom of the support rods (6). Sliding sleeves (8) are fitted on the support rods (6). A lead screw (9) is rotatably installed inside the fixed frame (5) and between the two support rods (6). Both ends of the lead screw (9) are connected to an outer sleeve (10). A push rod (11) is hinged to the end of the outer sleeve (10) away from the lead screw (9). The end of the push rod (11) away from the outer sleeve (10) is hinged to the sliding sleeve (8). A worm wheel (12) coaxial with the lead screw (9) is fixed in the middle of the lead screw (9). A worm (13) meshing with the worm wheel (12) passes through the fixed frame (5). An adjusting wheel (14) is fixed at one end of the worm (13) outside the fixed frame (5).

2. The skid-mounted equipment for crude oil heating at well sites according to claim 1, characterized in that, The crude oil heat exchange tank (3) has a crude oil inlet at the top of one end and a crude oil outlet at the bottom of the other end. A support frame (302) is fixed inside the crude oil heat exchange tank (3). The heat exchange coil (301) is arranged around the support frame (302). The output end and input end of the heat exchange coil (301) both pass through both ends of the crude oil heat exchange tank (3) and extend to the outside of the crude oil heat exchange tank (3).

3. A skid-mounted device for heating crude oil at well sites according to claim 2, characterized in that, The output end of the heat exchange coil (301) is connected to the input end of the circulation pump (16) installed on the base (1) through the return pipe (15). The output end of the circulation pump (16) is equipped with a two-position three-way solenoid valve (17) through the conduit. The conduit is connected to one of the input ends of the two-position three-way solenoid valve (17). The other input end of the two-position three-way solenoid valve (17) is fixed with a water inlet pipe (18). The output end of the two-position three-way solenoid valve (17) is connected to the input end of the heating tank (4) through the water supply pipe (19). The heat exchange coil (301) input end is connected to the output end of the heating tank (4) through a water supply pipe (21) equipped with a booster pump (20).

4. A skid-mounted device for heating crude oil at well sites according to claim 3, characterized in that, The heating tank (4) consists of an inner tank (401) and an outer tank (402). The inner tank (401) is located inside the outer tank (402). Both ends of the inner tank (401) are fixed with connecting pipes (403) that communicate with the inner cavity of the inner tank (401). The connecting pipes (403) pass through the outer tank (402) and extend to the outside of the outer tank (402). The two connecting pipes (403) are connected to the water supply pipe (19) and the water replenishment pipe (21) at the ends located outside the outer tank (402), respectively.

5. A skid-mounted device for heating crude oil at well sites according to claim 4, characterized in that, The inner tank (401) is fitted with an electromagnetic heating coil (404), the outer surface of the outer tank (402) is fixed with an electromagnetic heating controller (405), the outer surface of the crude oil heat exchange tank (3) is fixed with a crude oil detection panel (304), and the control box (2) is equipped with an intelligent control motherboard.

6. A skid-mounted device for heating crude oil at well sites according to claim 5, characterized in that, The electromagnetic heating coil (404) is electrically connected to the intelligent control main board in the control box (2) through the electromagnetic heating controller (405). The circulating pump (16), the two-position three-way solenoid valve (17), the booster pump (20), and the crude oil detection panel (304) are all electrically connected to the intelligent control main board.

7. A skid-mounted device for heating crude oil at well sites according to claim 1, characterized in that, The base (1) has a support frame fixed at the bottom, which is made of several I-beams welded together. The fixing frame (5) is made of channel steel welded onto the base (1).

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