A centralized scale inducing device for oilfield stations

Abstract

The application discloses an oil field station centralized induction fouling device, which adopts a container body and upper and lower fouling fields arranged in the container body to form a cavity capable of containing oil liquid. The upper fouling field adopts a plurality of parallel and spaced baffles to form a vertical blocking structure, and the lower fouling field adopts a plurality of annular plates arranged in an annular interval to form a disturbance structure. Water is introduced from the lower part, and under the action of the annular plates arranged in the annular interval, a circulating field is formed to make the oil liquid to be treated rotate and mix fully. Then, under the action of the parallel baffles of the upper fouling field, the oil liquid is mixed again, and the fouling components in the oil liquid are deposited on the baffles and the annular plates, so that the purpose of inducing fouling is achieved, and common fouling components such as calcium carbonate and barium sulfate in the oil liquid are removed. The device is fixedly connected to the upstream of a gathering and transportation system with serious fouling, so that the fouling components can be pre-deposited in the device, and the fouling and corrosion problems of subsequent system equipment and pipe junctions can be solved or greatly alleviated.

Description

Technical Field

[0001] This invention relates to the field of gathering and transportation system maintenance technology, and in particular to a centralized scale-inducing device for oilfield stations. Background Technology

[0002] Currently, some surface gathering and water injection systems in oilfields are severely corroded and scaled, leading to a year-on-year increase in equipment failure frequency and maintenance costs. Existing prevention and control technologies can no longer fully meet the needs of oilfield corrosion and scale prevention. For example, problems such as scaling and corrosion at multi-layer mixed transportation stations have not yet been solved. Therefore, it is urgent to carry out research on scale prevention technology in medium and high water-cut blocks.

[0003] Existing technologies mainly employ two approaches: one is to remove or reduce scale buildup in equipment and manifolds during the mixed-transport process by adding chemical agents; the other is to perform special treatments on the inner walls of equipment and pipes, such as adding coatings or using special materials, to slow down scaling and enhance corrosion resistance. In practical engineering, these two approaches are often combined. Scale and corrosion on equipment and manifolds are difficult to avoid in the field, and traditional treatment methods have shown unsatisfactory results. Using large amounts of chemicals results in significant secondary pollution and high costs; furthermore, the anti-scaling and anti-corrosion treatment of the inner walls of equipment and manifolds is technically challenging, costly, and its effectiveness is difficult to evaluate. Summary of the Invention

[0004] The purpose of this invention is to provide a centralized scale-inducing device for oilfield stations to overcome the shortcomings of existing technologies. This invention employs a centralized induction treatment method, connecting a centralized scale-inducing device at a fixed point upstream of a severely scaled gathering and transportation system. This allows scale components to be pre-deposited within the device, thereby solving or mitigating scale and corrosion problems in subsequent system equipment and manifolds. After adopting this technical solution, downstream equipment and manifolds transported by this device are free of scale components, thus significantly reducing the scale pressure in the downstream system. This device also boasts low treatment costs, simple construction and maintenance, and a long service life.

[0005] A centralized scaling-inducing device for oilfield stations includes a container body and an upper scaling field and a lower scaling field installed inside the container body, forming a cavity that can contain oil. The side walls of the container body are respectively provided with an inlet port and an outlet port. The inlet port is located below the outlet port, so that the oil enters from the bottom and flows out from the top, which can fill the wall. The upper scaling field is fixed to the upper end of the lower scaling field. The upper scaling field adopts a vertical barrier structure formed by multiple parallel and spaced baffles, and the lower scaling field adopts a disturbance structure composed of multiple annular and spaced ring plates.

[0006] Preferably, the container body adopts a detachable structure for cleaning and replacing the upper and lower scaling fields inside. The upper end cap is connected to the tank body through a container flange, and the lower end cap is fixed to the lower end of the tank body.

[0007] Preferably, the container body ensures its structural sealing and stability, with the lower end cap integrally formed with the tank body, or using a flange connection.

[0008] Preferably, the upper side wall of the tank is provided with a backwashing interface, and the lower end of the lower head is provided with a slag discharge port.

[0009] Preferably, the liquid inlet is located on the lower side wall of the tank, and the opening direction of the liquid inlet is parallel to the circumferential tangent of the tank.

[0010] Preferably, a safety valve interface is provided at the upper end of the upper end cap.

[0011] Preferably, multiple baffles in the upper scaling field are arranged at equal intervals.

[0012] Preferably, multiple partitions are positioned and fixed at equal intervals by upper partition support plates and lower partition support plates.

[0013] Preferably, multiple annular plates are positioned and fixed at equal intervals by annular plate support plates, with the outermost annular plate spaced apart from the inner wall of the tank.

[0014] Preferably, a support ring is welded to the inner wall of the tank, and the lower scaling field is fixed on the support ring.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] This invention discloses a centralized scale-inducing device for oilfield stations. It employs a container body and upper and lower scale-inducing fields installed inside the container body, forming a cavity capable of containing oil. The side walls of the container body are respectively provided with an inlet and an outlet, with the inlet located below the outlet, allowing oil to enter from the bottom and flow out from the top, completely filling the wall. The upper scale-inducing field is fixed above the lower scale-inducing field. The upper scale-inducing field uses multiple parallel, spaced baffles to form a vertical barrier structure, while the lower scale-inducing field uses multiple annularly spaced plates to form a disturbance structure. Water is introduced from below, and the water, under the action of the annularly spaced plates, forms a circulating flow field, allowing the oil to be treated to rotate and mix fully. Then, under the action of the parallel baffles in the upper scale-inducing field, the oil is mixed again, causing scale-forming components in the oil to deposit on the baffles and annular plates, thereby achieving the purpose of inducing scale formation and removing common scale-forming components such as calcium carbonate and barium sulfate from the oil. By connecting this device to the upstream of the gathering and transportation system where scaling is severe, the scaling components can be pre-deposited within the device, thereby solving or greatly mitigating scaling and corrosion problems in subsequent system equipment and manifolds.

[0017] Furthermore, the upper and lower scaling fields are set up with different structural methods. The liquid enters in a direction parallel to the tangent of the tank circumference at the inlet, causing the liquid to rotate in a ring along the annular plate to avoid liquid turbulence. At the junction of the upper and lower scaling fields, the direction of the oil is suddenly changed, further agitating the oil. Under the action of the vertical barrier structure formed by the upper scaling field, the oil rises along the surface of the baffle and makes full contact, thereby improving scaling efficiency. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the main structure of the centralized scale-inducing device for oilfield stations in an embodiment of the present invention.

[0020] Figure 2 This is a top view of the centralized scale-inducing device at an oilfield station, as described in an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the upper structure of the internal scaling field of the centralized scaling induction device in an oilfield station according to an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the lower structure of the internal scaling field of the centralized scaling induction device in an oilfield station according to an embodiment of the present invention.

[0023] Figure label:

[0024] 101-Safety valve interface; 102-Upper head; 103-Container flange; 104-Tank body; 105-Support ring; 106-Liquid inlet interface; 107-Lower head; 108-Bottom flange; 109-Slag discharge port; 110-Support leg; 111-Backwash interface; 112-Liquid outlet interface;

[0025] 200 - Upper scaling area; 201 - Baffle; 202 - Upper support plate of the baffle; 203 - Lower support plate of the baffle;

[0026] 300 - Lower scaling area; 301 - Annular plate; 302 - Annular plate support plate. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings:

[0030] like Figure 1 As shown, this invention discloses a centralized scaling induction device for oilfield stations. This device is strategically connected upstream of a severely scaling gathering and transportation system, allowing scaling components to be pre-deposited within the device, thereby solving or mitigating scaling and corrosion problems in subsequent system equipment and manifolds. Specifically, it includes a container body and an upper scaling field 200 and a lower scaling field 300 installed inside the container body. The side walls of the container body are respectively provided with an inlet port 106 and an outlet port 112. The inlet port 106 is located below the outlet port 112. The upper scaling field 200 is fixed above the lower scaling field 300. The scale field 200 includes multiple parallel, spaced baffles 201, and the lower scale field 300 includes multiple annularly spaced plates 301. A bottom-inlet water intake method is adopted. Under the action of the annularly spaced plates 301, the incoming water forms a circulating flow field, allowing the oil to be treated to rotate and mix thoroughly. Then, under the action of the parallel baffles in the upper scale field 200, the oil is mixed again, causing the scale-forming components in the oil to deposit on the baffles 201 and annular plates 301, thereby inducing scale formation and removing common scale-forming components such as calcium carbonate and barium sulfate from the oil. Connecting this device to a point upstream of a gathering and transportation system with severe scaling allows scale-forming components to be pre-deposited within the device, thus solving or significantly mitigating scaling and corrosion problems in subsequent system equipment and manifolds.

[0031] In this application, both the upper scaling field 200 and the lower scaling field 300 are fixed within the container body, which can be either a separate structure or an integrated structure. The liquid inlet 106 is located in the lower middle part of the lower scaling field 300, preferably in the lower section of the lower scaling field 300. This allows the liquid to enter the container body and flow downwards from the bottom of each annular plate, filling the lower scaling field 300. The liquid undergoes a backflow process, ensuring sufficient contact with the scaling on the annular plates of the lower scaling field 300. The liquid outlet 112 is located at the upper end of the upper scaling field 200. This allows the solution to be agitated by the disturbance in the upper scaling field 200 and flow out from the liquid outlet 112. The liquid can then fully contact the surface of the baffles within the upper scaling field 200, achieving the purpose of inducing scaling.

[0032] Specifically, such as Figure 1 As shown, the container body includes an upper end cap 102, a tank body 104, and a lower end cap 107. The upper end cap 102 and the tank body 104 are connected by a container flange 103. The container flange 103 includes an upper flange structure and a lower flange structure. The upper flange structure is an integral structure with the upper end cap 102, and the lower flange structure is an integral structure with the upper end of the tank body 104. They are fixedly connected by bolts. Alternatively, the upper end cap 102 and the tank body 104 can be fixed by welding. The purpose is to achieve a fixed seal between the two, improve the connection stability, and avoid leakage during the scaling process of oil in the tank.

[0033] Meanwhile, in order to improve the safety of oil scaling and to effectively monitor the scaling device, a safety valve interface 101 is provided on the top of the upper head 102. The safety valve interface 101 is connected to a safety monitoring device, such as a pressure relief valve.

[0034] Meanwhile, a backwashing port 111 is provided on the upper side wall of the tank 104 for connecting backwashing solution to clean the scaled device after scaling, so as to achieve the purpose of reusability.

[0035] The liquid inlet 106 is located on the lower side wall of the tank 104, and the opening direction of the liquid inlet 106 is parallel to the circumferential tangent of the tank 104.

[0036] The lower end cap 107 is fixed to the lower end of the tank body 104. The lower end cap 107 and the tank body 104 are integrally formed or connected by a flange. Since the oil needs to pass through the inside of the tank body 104, the lower end cap 107 is integrally formed with the tank body 104, which has a good sealing effect and prevents leakage. The lower end cap 107 is provided with a bottom flange 108, and the bottom flange 108 is connected to the slag discharge port 109 to realize backwashing and slag discharge.

[0037] Preferably, in this embodiment, the liquid inlet 106 is tangentially connected to the inner circular surface of the tank 104, such as... Figure 2 As shown, after the upstream pipeline is connected to the liquid inlet 106, the liquid medium enters the tank 104 tangentially, forming a swirling motion.

[0038] Preferably, in this embodiment, the internal scaling field of the centralized scaling device, the upper scaling field 200, adopts an equidistant multi-layer flat plate structure, see... Figure 3 As shown; the lower scaling field 300 adopts a multi-layered annular plate structure with equal spacing between adjacent annular plates, see... Figure 4 As shown.

[0039] like Figure 3 As shown, the internal scaling field 200 of this centralized scaling induced device includes multiple parallel partitions 201. The multiple parallel partitions 201 are positioned and fixed at equal intervals by upper support plates 202 and lower support plates 203. Slots are provided on both the upper support plates 202 and the lower support plates 203, and the partitions 201 are inserted into the slots. The width of the multiple parallel partitions 201 is constrained by the inner wall surface of the tank 104. After assembly, the envelope of the multiple parallel partitions 201 is in contact with the inner wall surface of the tank 104.

[0040] like Figure 4 As shown, the internal scaling field 300 of this centralized scaling-inducing device consists of multiple concentric annular plates 301 of different diameters. These concentric annular plates 301 are positioned and fixed at equal intervals by annular plate support plates 302. The outermost annular plate 301 is concentric with the inner wall of the tank 104 and has a certain distance between it and the inner wall.

[0041] Specifically, in this concentration, the upper scaling field 200 inside the scaling induced device is directly placed on top of the lower scaling field 300; the lower scaling field 300 is installed inside the tank 104 and is positioned and supported by a support ring 105, which is welded to the inner wall of the tank 104.

[0042] Specifically, the number of parallel baffles 201 constituting the upper scaling field 200 should be calculated and determined based on the process flow rate and tank diameter specified for the device. Through calculation, the preferred number of baffles in this embodiment is 20. The number of annular plates 301 constituting the lower scaling field 300 should be calculated and determined based on the process flow rate and tank diameter specified for the device. Through calculation, the preferred number of annular plates in this embodiment is 8.

[0043] The lower end of the tank body 104 is fixed with a support leg 110, which supports the tank body 104. A support seat is provided on the side wall of the tank body 104. The support leg 110 and the support seat are fixedly connected by bolts, which facilitates installation and maintenance.

[0044] The above technical solution adopts a centralized and fixed-point treatment method. This device is connected upstream of the collection and transportation system with severe scaling, so that the scaling components are pre-deposited in the device, thereby solving or mitigating the scaling and corrosion problems of downstream system equipment and manifolds. After adopting this technical solution, the scaling components in the downstream equipment and manifold transportation are greatly reduced, thus greatly reducing the scaling pressure of the downstream system. The treatment method of this technical solution has low cost, simple construction and maintenance, and long service life.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A centralized scaling-inducing device for oilfield stations, characterized in that, It includes a container body and an upper scaling field (200) and a lower scaling field (300) installed inside the container body; the side walls of the container body are respectively provided with a liquid inlet (106) and a liquid outlet (112), the liquid inlet (106) is located below the liquid outlet (112), the upper scaling field (200) is fixed to the upper end of the lower scaling field (300), the upper scaling field (200) includes a plurality of parallel spaced baffles (201), and the lower scaling field (300) includes a plurality of annular spaced annular plates (301).

2. The oilfield station centralized scale-inducing device according to claim 1, characterized in that, The container body includes an upper end cap (102), a tank body (104) and a lower end cap (107). The upper end cap (102) is connected to the tank body (104) through a container flange (103), and the lower end cap (107) is fixed to the lower end of the tank body (104).

3. The oilfield station centralized scale-inducing device according to claim 2, characterized in that, The lower end cap (107) is integrally formed with the tank body (104), or is connected by a flange.

4. The oilfield station centralized scale-inducing device according to claim 2, characterized in that, The upper side wall of the tank (104) is provided with a backwashing interface (111), and the lower end of the lower head (107) is provided with a slag discharge port (109).

5. The oilfield station centralized scale-inducing device according to claim 2, characterized in that, The liquid inlet (106) is located on the lower side wall of the tank (104), and the opening direction of the liquid inlet (106) is parallel to the circumferential tangent of the tank (104).

6. The oilfield station centralized scale-inducing device according to claim 2, characterized in that, A safety valve port (101) is provided at the upper end of the upper end cap (102).

7. The oilfield station centralized scale-inducing device according to claim 1, characterized in that, Multiple baffles (201) are equally spaced in the upper scaling field (200).

8. The oilfield station centralized scale-inducing device according to claim 1, characterized in that, Multiple partitions (201) are positioned and fixed at equal intervals by upper partition support plate (202) and lower partition support plate (203).

9. A centralized scaling induction device for oilfield stations according to claim 2, characterized in that, Multiple annular plates (301) are positioned and fixed at equal intervals by annular plate support plates (302), with the outermost annular plate (301) spaced apart from the inner wall of the tank body (104).

10. The oilfield station centralized scale-inducing device according to claim 1, characterized in that, A support ring (105) is welded to the inner wall of the tank (104), and the lower scaling field (300) is fixed on the support ring (105).

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