Wellhead anti-blocking device with guiding function for oil water injection

Abstract

The utility model relates to the technical field of oil injection, more to the technical field of wellhead anti -blocking device, specifically disclose a kind of wellhead anti -blocking device with guiding function for oil injection, including connecting pipe, assembling pipe structure and filter structure, the assembling pipe structure top and bottom end are connected with connecting pipe, filter structure, guiding structure and adsorption structure are respectively installed in the assembling pipe structure from top to bottom. The wellhead anti -blocking device with guiding function for oil injection, through filter structure, it is convenient to improve its service life, improve filter effect simultaneously, through guiding structure, it is convenient to guide water flow, reduce water flow and reduce the damage of water flow to adsorption structure, through adsorption structure, it is convenient to filter out ferromagnetic impurities in moisture, through assembling pipe structure, it is convenient to clean and maintain its internal structure, through protection structure, it is convenient to protect its internal structure, greatly improve overall service life.

Description

Technical Field

[0001] This utility model relates to the field of oil water injection technology, and more particularly to the field of wellhead anti-clogging device technology, specifically a wellhead anti-clogging device for oil water injection with guiding function. Background Technology

[0002] In the mid-to-late stages of oilfield development, water injection technology is commonly used to maintain formation pressure and improve oil recovery. This technology involves injecting high-pressure water into the oil-bearing reservoir to displace crude oil and flow to production wells. However, during long-term water injection, due to the complex quality of the injected water, severe blockage problems commonly occur at the wellhead and near-wellbore area. Therefore, it is necessary to install wellhead anti-blockage devices for filtration to prevent blockage and improve the efficiency of oil water injection.

[0003] Referring to Chinese Patent Publication No. CN218759818U, published on March 28, 2023, a device for preventing blockage in water injection wells used in oil wells is disclosed. The device includes a pipe extending into the water injection well and an anti-blockage device located within the pipe. Multiple drainage holes are provided on the side wall of the pipe. The anti-blockage device includes a drive mechanism, two blocking devices, and multiple connecting devices. The drive mechanism includes a rotating shaft and a drive motor connected to the lower end of the output shaft. The blocking devices include an arc-shaped plate and a blocking column installed on the outer side wall of the arc-shaped plate. The connecting devices connect the rotating shaft and the arc-shaped plate. The drive motor controls the movement of the arc-shaped plate to insert or disengage the blocking column from the drainage holes. This invention solves the problem that existing water injection well pipes lack the necessary structure to clear sand and gravel blocking the drainage holes, requiring significant energy to overcome the resistance of the sand and gravel to complete water injection.

[0004] The existing technology has the following technical problems: the service life of the filter structure of the existing wellhead anti-clogging device for oil water injection needs to be improved, it is not convenient to guide the water flow, and it is not convenient to filter out ferromagnetic impurities in the water; therefore, we propose an oil water injection wellhead anti-clogging device with guiding function to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide a wellhead anti-clogging device for oil water injection with a guiding function, so as to solve the problems mentioned in the background art, such as the service life of the filter structure of the existing wellhead anti-clogging device for oil water injection needing to be improved, the inconvenience in guiding water flow, and the inconvenience in filtering out ferromagnetic impurities in the water.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wellhead anti-clogging device for oil water injection with guiding function, comprising a connecting pipe, an assembly pipe structure and a filter structure, wherein the top and bottom ends of the assembly pipe structure are connected to connecting pipes, and the assembly pipe structure is equipped with a filter structure, a guiding structure and an adsorption structure from top to bottom, and a protective structure is provided on the outside of the assembly pipe structure; The filtration structure includes a large-pore filter and a small-pore filter, with the large-pore filter positioned above the small-pore filter.

[0007] Preferably, the assembled pipe structure includes a first mounting pipe, a second mounting pipe, a third mounting pipe, and a flange. The top end of the first mounting pipe is fixedly connected to the second mounting pipe via the flange and bolts, and the top end of the second mounting pipe is fixedly connected to the third mounting pipe via the flange and bolts.

[0008] Preferably, a connecting pipe is fixedly connected to the top end of the first mounting pipe and the bottom end of the third mounting pipe.

[0009] Preferably, the guiding structure includes a mounting ring, a spiral guide plate, and guide holes. The spiral guide plate is fixedly installed inside the mounting ring, and multiple guide holes are formed in the wall of the spiral guide plate.

[0010] Preferably, the mounting ring is fixedly installed inside the second mounting tube.

[0011] Preferably, the adsorption structure includes a filter plate, a neodymium iron boron permanent magnet block, epoxy resin, and soft iron. The filter plate is embedded with multiple soft iron blocks, and epoxy resin is filled between the soft iron blocks and the neodymium iron boron permanent magnet blocks.

[0012] Preferably, the filter plate is fixedly installed inside the first mounting tube.

[0013] Preferably, the protective structure includes an outer half-ring, a middle half-ring, an inner half-ring, and a connecting plate. The middle half-ring is fixedly connected to the inner side of the outer half-ring, the inner half-ring is fixedly connected to the inner side of the middle half-ring, and the connecting plate is fixedly connected to the outer side of the outer half-ring.

[0014] Preferably, the connecting plate is fixedly connected by bolts.

[0015] Preferably, both the large-pore filter and the small-pore filter are fixedly installed inside the third mounting tube.

[0016] Compared with the prior art, this utility model has at least the following beneficial effects: the wellhead anti-clogging device for oil water injection with guiding function improves its service life and filtering effect through the filtration structure; the guiding structure facilitates the guidance of water flow, reduces the force of water flow, and reduces the damage of water flow to the adsorption structure; the adsorption structure facilitates the filtration of ferromagnetic impurities in the water; the assembly pipe structure facilitates the cleaning and maintenance of its internal structure; and the protective structure facilitates the protection of its internal structure, greatly improving the overall service life.

[0017] 1. It is equipped with a filtration structure, with a large-pore filter screen placed on top of a small-pore filter screen. This allows the large-pore filter screen to filter out larger particles of impurities in the water, while the small-pore filter screen filters out smaller particles of impurities. This prevents impurities from accumulating on one filter screen, extends the service life of the filter screen, and improves the filtration effect. 2. It is equipped with a guiding structure. The design of the spiral guide plate can guide the water flow to flow slowly downward in the spiral direction, thereby reducing the water flow force and reducing the damage of the water flow to the adsorption structure below the spiral guide plate; Furthermore, the spiral guide plate has multiple guide holes, allowing a small amount of water to drip slowly downwards from the guide holes, thus preventing water accumulation on the spiral guide plate. 3. It is equipped with an adsorption structure. Two sets of neodymium iron boron permanent magnet blocks at equal angles are embedded in the filter plate. When water flows through the filter plate, the ferromagnetic impurities in it are adsorbed by the neodymium iron boron permanent magnet blocks, thereby removing the ferromagnetic impurities in the water. Furthermore, the NdFeB permanent magnet block is encapsulated in epoxy resin, which protects the NdFeB permanent magnet block from corrosion by coolant (such as liquid helium) and suppresses magnetic field fluctuations caused by vibration. Furthermore, as a high-permeability material, soft iron forms a low-resistivity path in the gap between magnets, guiding magnetic field lines through the soft iron, thereby reducing magnetic leakage and concentrating magnetic field energy at the top and bottom of the filter plate, thus improving magnetic field uniformity. 4. An assembly pipe structure is provided, consisting of a first installation pipe, a second installation pipe, and a third installation pipe from bottom to top. An adsorption structure, a flow guiding structure, and a filter structure are installed from bottom to top, and adjacent structures are fixed by flanges and bolts, making each installation pipe easy to disassemble, thus facilitating the disassembly of each structure and making it easy to clean and maintain each structure. 5. It is equipped with a protective structure, with an outer, middle and inner protective shell. From the inside to the outside, it can use nylon (wear-resistant, reducing magnet wear), silicon steel sheet (shielding low-frequency magnetic field interference), and 304 stainless steel (waterproof and corrosion resistant), which greatly improves the overall service life. Furthermore, a connecting plate is fixedly connected to the outer side of the outer half ring. The connecting plates on the two outer half rings are fixedly connected by bolts, which makes it easy to separate the outer half rings on both sides. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a top view of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the assembly tube structure of this utility model; Figure 3 This is a first structural schematic diagram of the present invention in three-dimensional cross-section; Figure 4 This is a schematic diagram of the second structure of the present invention in three-dimensional cross-section; Figure 5 This utility model Figure 4 Enlarged structural diagram at point A; Figure 6 This is a schematic diagram of the adsorption structure of this utility model.

[0019] In the diagram: 1. Connecting pipe; 2. Assembly pipe structure; 201. First mounting pipe; 202. Second mounting pipe; 203. Third mounting pipe; 204. Flange; 3. Filter structure; 301. Large-aperture filter screen; 302. Small-aperture filter screen; 4. Guiding structure; 401. Mounting ring; 402. Spiral guide plate; 403. Guide hole; 5. Adsorption structure; 501. Filter plate; 502. Neodymium iron boron permanent magnet block; 503. Epoxy resin; 504. Soft iron; 6. Protective structure; 601. Outer half ring; 602. Middle half ring; 603. Inner half ring; 604. Connecting plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] To address the technical problems of existing wellhead anti-clogging devices for oil injection having insufficient service life, difficulty in guiding water flow, and ineffective filtration of ferromagnetic impurities in the water, this embodiment discloses the following technical solution: Please see Figure 1 - Figure 6A wellhead anti-clogging device for oil water injection with guiding function includes a connecting pipe 1, an assembly pipe structure 2, a first installation pipe 201, a second installation pipe 202, a third installation pipe 203, a flange 204, a filter structure 3, a large-aperture filter screen 301, a small-aperture filter screen 302, a guiding structure 4, an installation ring 401, a spiral guide plate 402, a guide hole 403, an adsorption structure 5, a filter plate 501, a neodymium iron boron permanent magnet block 502, epoxy resin 503, soft iron 504, a protective structure 6, an outer half-ring 601, a middle half-ring 602, an inner half-ring 603, and a connecting plate 604.

[0022] like Figure 3 and Figure 4 As shown, the assembly pipe structure 2 is equipped with a filter structure 3, a guide structure 4, and an adsorption structure 5 from top to bottom. The filter structure 3 includes a large-pore filter screen 301 and a small-pore filter screen 302. The large-pore filter screen 301 is set above the small-pore filter screen 302. The water flow first passes through the large-pore filter screen 301, and larger particulate impurities are filtered out. Then it passes through the small-pore filter screen 302, and smaller particulate impurities are filtered out. This achieves graded filtration of impurities, avoids the rapid accumulation of individual filter screens and the formation of blockages, thereby improving the filtration effect. like Figure 3 and Figure 4 As shown, the guiding structure 4 includes an installation ring 401, a spiral guide plate 402, and guide holes 403. The spiral guide plate 402 is provided below the small-aperture filter screen 302. The water filtered by the filter structure 3 flows downward along the spiral guide plate 402, reducing the water flow speed, thereby reducing the water flow force and reducing the damage of the water flow to the adsorption structure 5. Multiple guide holes 403 are opened in the wall of the spiral guide plate 402, and the water flow can also flow out from the guide holes 403 to avoid the accumulation of small amounts of water. like Figure 3 - Figure 6 As shown, the adsorption structure 5 includes a filter plate 501, a neodymium iron boron permanent magnet block 502, an epoxy resin 503, and soft iron 504. Multiple soft iron blocks 504 are embedded in the filter plate 501. Epoxy resin 503 is filled between the soft iron blocks 504 and the neodymium iron boron permanent magnet blocks 502. Guided by the spiral guide plate 402, the water flows slowly through the filter plate 501. The neodymium iron boron permanent magnet blocks 502 adsorb ferromagnetic impurities in the water, thereby removing ferromagnetic impurities from the water. The neodymium iron boron permanent magnet block 502 is wrapped with epoxy resin 503. The epoxy resin 503 can protect the neodymium iron boron permanent magnet block 502 from the corrosion of coolant (such as liquid helium) and suppress magnetic field fluctuations caused by vibration. The soft iron 504, as a high magnetic permeability material, forms a low magnetic resistance path in the gap of the neodymium iron boron permanent magnet block 502, guides the magnetic field lines through the soft iron 504, thereby reducing magnetic leakage and making the magnetic field energy more concentrated at the top and bottom of the filter plate 501, thereby improving the uniformity of the magnetic field. like Figure 2 - Figure 4 As shown, the assembled pipe structure 2 includes a first mounting pipe 201, a second mounting pipe 202, a third mounting pipe 203, and a flange 204. From bottom to top, the structure consists of the first mounting pipe 201, the second mounting pipe 202, and the third mounting pipe 203. Adjacent mounting pipes are fixed with flange 204 and bolts. At the same time, the top end of the first mounting pipe 201 and the bottom end of the third mounting pipe 203 are fixedly connected to the connecting pipe 1. The connecting pipe 1 is also connected to other water pipes through flange 204 and bolts, making each mounting pipe easy to disassemble. The filter plate 501 is fixedly installed inside the first mounting tube 201. The spiral guide plate 402 is fixedly installed inside the mounting ring 401. The mounting ring 401 is fixedly installed inside the second mounting tube 202. The large-pore filter screen 301 and the small-pore filter screen 302 are both fixedly installed inside the third mounting tube 203, which makes it easy to disassemble the filter structure 3, the guide structure 4 and the adsorption structure 5, thereby facilitating the cleaning and maintenance of each structure. like Figure 1 and Figure 3 - Figure 5 As shown, the protective structure 6 includes an outer half-ring 601, a middle half-ring 602, an inner half-ring 603, and a connecting plate 604. The middle half-ring 602 is fixedly connected to the inner side of the outer half-ring 601, and the inner half-ring 603 is fixedly connected to the inner side of the middle half-ring 602. Together, they form a protective shell. The inner half-ring 603 can be made of nylon, which is wear-resistant and reduces magnet wear. The middle half-ring 602 is made of silicon steel sheet, which can shield low-frequency magnetic field interference. The outer half-ring 601 is made of 304 stainless steel, which is waterproof and corrosion-resistant, thereby greatly improving the overall service life. A connecting plate 604 is fixedly connected to the outer side of the outer half ring 601. The connecting plates 604 of the two outer half rings 601 are fixedly connected by bolts, which facilitates the disassembly of the protective shells on both sides and facilitates the operation inside (the above-mentioned disassembly, cleaning and maintenance operations).

[0023] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wellhead anti-clogging device for oil water injection with guiding function, comprising a connecting pipe (1), an assembly pipe structure (2), and a filter structure (3), characterized in that: The top and bottom ends of the assembly tube structure (2) are connected to connecting tubes (1). The assembly tube structure (2) is equipped with a filter structure (3), a guide structure (4) and an adsorption structure (5) from top to bottom. The assembly tube structure (2) is provided with a protective structure (6) on the outside. The filter structure (3) includes a large-pore filter (301) and a small-pore filter (302), with the large-pore filter (301) positioned above the small-pore filter (302).

2. The wellhead anti-clogging device for oil water injection with guiding function according to claim 1, characterized in that: The assembled pipe structure (2) includes a first mounting pipe (201), a second mounting pipe (202), a third mounting pipe (203), and a flange (204). The top end of the first mounting pipe (201) is fixedly connected to the second mounting pipe (202) through the flange (204) and bolts. The top end of the second mounting pipe (202) is fixedly connected to the third mounting pipe (203) through the flange (204) and bolts.

3. The wellhead anti-clogging device for oil water injection with guiding function according to claim 2, characterized in that: The top end of the first mounting tube (201) and the bottom end of the third mounting tube (203) are both fixedly connected to a connecting tube (1).

4. The wellhead anti-blocking device with guiding function for oil water injection according to claim 1, characterized in that: The guiding structure (4) includes a mounting ring (401), a spiral guide plate (402), and guide holes (403). The spiral guide plate (402) is fixedly installed inside the mounting ring (401), and multiple guide holes (403) are opened in the wall of the spiral guide plate (402).

5. A wellhead anti-clogging device for oil water injection with guiding function according to claim 4, characterized in that: The mounting ring (401) is fixedly installed inside the second mounting tube (202).

6. The wellhead anti-clogging device for oil water injection with guiding function according to claim 1, characterized in that: The adsorption structure (5) includes a filter plate (501), a neodymium iron boron permanent magnet block (502), an epoxy resin (503), and soft iron (504). Multiple soft irons (504) are embedded in the filter plate (501), and epoxy resin (503) is filled between the soft irons (504) and the neodymium iron boron permanent magnet block (502).

7. A wellhead anti-clogging device for oil water injection with guiding function according to claim 6, characterized in that: The filter plate (501) is fixedly installed inside the first mounting tube (201).

8. A wellhead anti-clogging device for oil water injection with guiding function according to claim 1, characterized in that: The protective structure (6) includes an outer half-ring (601), a middle half-ring (602), an inner half-ring (603), and a connecting plate (604). The middle half-ring (602) is fixedly connected to the inner side of the outer half-ring (601), the inner half-ring (603) is fixedly connected to the inner side of the middle half-ring (602), and the connecting plate (604) is fixedly connected to the outer side of the outer half-ring (601).

9. A wellhead anti-clogging device for oil water injection with guiding function according to claim 8, characterized in that: The connecting plate (604) is fixedly connected by bolts.

10. The wellhead anti-blocking device with guiding function for petroleum water injection according to claim 1, characterized in that: Both the large-pore filter (301) and the small-pore filter (302) are fixedly installed inside the third mounting tube (203).

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