Iron removal system for oilfield production

Abstract

The utility model provides a deironing system for oilfield exploitation belongs to magnetic deironing technical field, solves the deficiency that the existing technology cannot efficiently and reliably collect the magnetic substance generated in the oilfield exploitation process. The deironing system includes: support, feeding device is used for receiving the magnetic separation material generated in the oilfield exploitation process and supplies to the feed device, the magnetic separation device includes a plurality of magnetic gathering medium detachably installed in the feed device, the drive mechanism drives the sorting magnetic system to move oppositely outside the feed device, when the sorting magnetic system and the magnetic gathering medium are close, the magnetic gathering medium magnetically attracts the magnetic substance in the magnetic separation material and allows the non -magnetic substance to pass, when the sorting magnetic system and the magnetic gathering medium are far away, the magnetic gathering medium releases the magnetic substance, the unloading device is used for respectively discharging the magnetic substance and the non -magnetic substance. The deironing system for oilfield exploitation provided by the utility model has the advantages of being able to efficiently and reliably collect the magnetic substance generated in the oilfield exploitation process.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic iron removal technology, specifically relating to an iron removal system used in oilfield extraction. Background Technology

[0002] In recent years, with the advancement of oilfield drilling technology and the intensification of oil and gas exploration and development, drilling depths and the number of wells have been continuously increasing. During oilfield extraction, drill bits made of magnetic materials such as ferrous metals are used in conjunction with drilling fluids or hydraulic fluids to break through rocks. During the drilling process, the drill bits suffer wear and chipping, resulting in magnetic particles being present in the drilling fluid. In addition, the underground material being drilled in the oilfield may also contain trace amounts of magnetic particles such as ferrous metals. The efficient and reliable collection of these magnetic particles is crucial for the recycling of drilling fluids and the protection of the surrounding environment of the oilfield. However, the current lack of relevant collection equipment has brought adverse effects to both production and the environment.

[0003] Therefore, there is an urgent need to provide an iron removal system for oilfield extraction that can efficiently and reliably collect magnetic materials generated during the oilfield extraction process. Utility Model Content

[0004] In view of this, the present invention provides an iron removal system for oilfield extraction, which solves the technical problem that the existing technology cannot efficiently and reliably collect magnetic materials generated during the oilfield extraction process.

[0005] The technical solution adopted in this utility model is as follows:

[0006] This utility model provides an iron removal system for oilfield extraction, comprising: a support frame; a feeding device, a feeder, a magnetic separator, a sorting device, and a discharge device supported by the support frame; the feeding device is used to receive the material to be magnetically separated generated during the oilfield extraction process; the feeder is used to receive the material to be magnetically separated from the feeding device; the magnetic separator includes multiple magnetic media detachably installed in the feeder; the sorting device includes a sorting magnetic system and a driving mechanism, the driving mechanism drives the sorting magnetic system to move relative to the outside of the feeder, so that the sorting magnetic system approaches or moves away from the magnetic media so that the magnetic media is correspondingly accepted or unaffected by the action of the sorting magnetic system; when the sorting magnetic system approaches the magnetic media, the magnetic media magnetically attracts magnetic substances in the material to be magnetically separated and allows non-magnetic substances to pass through; when the sorting magnetic system moves away from the magnetic media, the magnetic media releases magnetic substances; the discharge device is connected to the feeder and is used to separately discharge magnetic and non-magnetic substances.

[0007] Furthermore, the feeding device includes a feeding box and a filter screen arranged in the feeding box. The magnetically separated material enters the feeding box, is buffered, filtered by the filter screen, and then enters the feeding device.

[0008] Furthermore, the feed box includes an inclined plate at its bottom and a feed pipe opposite the inclined plate and connected to the interior of the feed box. The feeding device includes a first pipe and a second pipe, the feed pipe being connected to the first pipe, and the magnetic medium being detachably installed in the second pipe.

[0009] Furthermore, the first pipe is perpendicular to the second pipe, and the second feed pipe extends vertically. A first sealing cap is provided at the upper part of the second pipe, and multiple magnetic cleaning channels are provided on the first sealing cap. Each magnetic cleaning channel is used to receive cleaning agent supplied externally for rinsing magnetic substances on the magnetic medium. A funnel-shaped third pipe is connected to the bottom of the second pipe.

[0010] Furthermore, the unloading device includes a three-way pipe, a non-magnetic material unloading valve, and a magnetic material unloading valve. One branch of the three-way pipe is connected to a third branch pipe, and the non-magnetic material unloading valve and the magnetic material unloading valve are respectively installed in the other two branches of the three-way pipe.

[0011] Furthermore, the magnetic separator includes a hollow media box and a second sealing cover. The media box is arranged in a second pipe, and the second sealing cover is detachably fixed to the outside of the second pipe to seal the media box in the second pipe. Multiple magnetic media can be selectively installed or removed relative to the media box. The magnetic media include media sheets, media disks, and media rods.

[0012] Furthermore, a first sealing strip is provided between the first sealing cap and the upper end of the second pipe, and a second sealing strip is provided between the second sealing cap and the outer periphery of the second pipe.

[0013] Furthermore, the iron removal system also includes a feeding device and an intelligent electrical control device. The feeding device includes a feeding pump, an inlet pipe, an outlet pipe, and a feeding valve. The feeding pump is located between the inlet and outlet pipes. The feeding valve is used to open and close the connection between the outlet pipe and the feeding device. The outlet pipe is connected to the feed box's through-pipe. The feeding pump pumps the material to be magnetically separated generated during the oilfield extraction process through the inlet pipe, and then pumps it through the outlet pipe to the through-pipe. The feeding valve connects the outlet pipe to the feed box so that the feed box receives the material to be magnetically separated. The intelligent electrical control device is electrically connected to the drive mechanism, the non-magnetic material unloading valve, the magnetic material unloading valve, the feeding pump, and the feeding valve. When the intelligent electrical control device controls the drive mechanism... When the drive mechanism moves the sorting magnetic system close to the magnetic medium and controls the opening of the non-magnetic material unloading valve, the feeding pump, and the feeding valve, while the magnetic material unloading valve is closed, the material to be magnetically separated can pass through the magnetic medium. Magnetic materials are attracted by magnets, while non-magnetic materials are discharged. When the intelligent electronic control device controls the drive mechanism to move the sorting magnetic system away from the magnetic medium and controls the opening of the magnetic material unloading valve while the feeding pump, the feeding valve, and the non-magnetic material unloading valve are all closed, the magnetic materials attracted to the magnetic medium can be released and discharged, or the cleaning agent entering through each magnetic material cleaning channel can clean the magnetic materials that have not been completely released from the magnetic medium, thus allowing both to be discharged simultaneously.

[0014] Furthermore, the sorting device includes a sorting box, a sorting magnetic system arranged in the sorting box, a pair of rollers fixedly connected to the sorting box, a support with a pair of guide rails respectively cooperating with the pair of rollers, and a driving mechanism including a hydraulic cylinder, the cylinder body of the hydraulic cylinder being supported by the support, the piston rod of the hydraulic cylinder being telescopically connected to the sorting box, and the piston rod driving the analysis frame to reciprocate relative to the magnetic medium.

[0015] Furthermore, the magnetic material is ferromagnetic, and the material to be magnetically separated is a slurry that also includes drilling fluid or hydraulic fluid.

[0016] In summary, the beneficial effects of this utility model are as follows:

[0017] The iron removal system for oilfield extraction provided by this utility model uses a drive mechanism to move the sorting magnetic system relative to the magnetic concentrator. When the sorting magnetic system approaches the magnetic concentrator, the magnetic concentrator becomes magnetic and generates magnetic force, thereby attracting magnetic substances in the material to be magnetically separated. When the sorting magnetic system separates from the magnetic concentrator, the magnetic concentrator loses its magnetic force, and the magnetic substances in the magnetically attracted material to be magnetically separated are released. Therefore, it can distinguish and discharge magnetic substances and non-magnetic substances in the material to be magnetically separated generated during the oilfield extraction process. This allows for both the recycling of non-magnetic substances and the collection of magnetic substances for centralized processing, providing the advantages of efficient and reliable collection of magnetic materials generated during the oilfield extraction process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0019] Figure 1 This is a cross-sectional view of the entire iron removal system for oilfield extraction provided by this utility model in the front view direction;

[0020] Figure 2 This is a sectional view of the entire iron removal system for oilfield extraction provided by this utility model from a side view direction;

[0021] Figure 3 This is a partial sectional view of the feeding device and magnetic separation device of the iron removal system for oilfield extraction provided by this utility model in a side view direction.

[0022] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0023] Figure 5 This is a partial sectional view of the feeding device and magnetic separation device of the iron removal system for oilfield extraction provided by this utility model in the front view direction.

[0024] Figure 6 yes Figure 5 A magnified view of a section at point B in the middle;

[0025] Parts and component numbers in the diagram:

[0026] 1. Support frame; 11. Guide rail; 2. Feeding device; 21. Feeding box; 211. Inclined plate; 212. Feeding pipe; 22. Filter screen; 3. Feeding device; 31. First pipe; 32. Second pipe; 33. First sealing cover; 331. Magnetic cleaning channel; 34. Third pipe; 35. First sealing strip; 4. Magnetic separator; 41. Magnetic focusing medium; 42. Medium box; 43. Second sealing cover; 44. Second 5. Sealing strip; 51. Sorting device; 52. Sorting magnetic system; 53. Drive mechanism; 54. Hydraulic cylinder; 55.1. Piston rod; 55. Sorting box; 56. Box through pipe; 57. Roller; 68. Unloading device; 69. T-pipe; 60. Non-magnetic material unloading valve; 61. Magnetic material unloading valve; 72. Feeding device; 73. Feed pump; 74. Pump inlet pipe; 75. Pump outlet pipe; 76. Feed valve; 77. Intelligent electrical control device. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Unless otherwise specified, the element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or apparatus that includes said element. Where there is no conflict, embodiments of this utility model and the various features thereof can be combined with each other, all of which are within the protection scope of this utility model.

[0028] refer to Figure 1 and Figure 2As the purpose of this utility model, an iron removal system for oilfield extraction is provided, comprising a support 1 and a feeding device 2, a feed unit 3, a magnetic separator 4, a sorting device 5, and a discharge device 6 supported by the support 1. The feeding device 2 receives the material to be magnetically separated generated during the oilfield extraction process, and the feed unit 3 receives the material to be magnetically separated from the feeding device 2. The magnetic separator 4 includes multiple magnetic media 41 detachably installed in the feed unit 3. Since the magnetic media 41, especially those detachably installed in a media box (described further below), can be easily replaced from the feed unit 3, particularly from the side where the media box is located, the convenience and efficiency of replacing the magnetic media 41 are significantly improved. The sorting device 5 includes a sorting magnetic system 51 and a drive mechanism 52. The drive mechanism 52 drives the sorting magnetic system 51 to move relative to the outside of the feeding device 3, so that the sorting magnetic system 51 and the magnetic focusing medium 41 are brought close or far apart, respectively, so that the magnetic focusing medium 41 is either accepted or unaffected by the action of the sorting magnetic system 51. When the sorting magnetic system 51 and the magnetic focusing medium 41 are close, the magnetic focusing medium 41 magnetically attracts the magnetic substances in the material to be magnetically separated and allows non-magnetic substances to pass through. The unloading device 6 is connected to the feeding device 3 and is used to separately discharge the magnetic substances and non-magnetic substances. The unloading device 6 plays the role of discharging and separating materials. For a specific practical application example, the magnetic substances are especially ferromagnetic substances, such as iron, produced by the wear and cuttings of drill bits during oilfield extraction. The material to be magnetically separated is a slurry containing drilling fluid or hydraulic fluid, iron, and sand. The non-magnetic substances are drilling fluid from which the ferromagnetic substances and sand have been removed. When the sorting magnetic system 51 moves away from the magnetically focusing medium 41, the magnetically focusing medium 41 releases magnetic substances. The iron removal system for oilfield extraction provided by this invention uses a drive mechanism 52 to drive the sorting magnetic system 51 to move relative to the magnetically focusing medium 41. When the sorting magnetic system 51 approaches the magnetically focusing medium 41, it makes the magnetically focusing medium 41 magnetic, generating magnetic force to attract magnetic substances from the material to be magnetically separated. When the sorting magnetic system 51 separates from the magnetically focusing medium 41, the magnetically focusing medium 41 loses its magnetic properties and magnetic force, thus releasing the magnetic substances from the attracted material. Therefore, for the iron removal material generated during oilfield extraction... This material can separate and discharge magnetic materials and non-magnetic materials from the materials to be magnetically separated, thereby controlling the concentration of iron impurities, the main component of magnetic materials, to a low level below 1 mg / L. This is suitable for most oil fields and processes and avoids adverse effects on equipment and oil quality. Furthermore, it can recover non-magnetic materials, especially drilling fluids, for recycling in oil fields, and collect magnetic materials for centralized treatment to prevent environmental damage. It has the advantages of efficient and reliable collection of magnetic materials generated during oil field extraction.

[0029] Please refer to the reference. Figure 1Preferably, the feeding device 2 includes a feeding box 21 and a filter screen 22 arranged in the feeding box 21. The material to be magnetically separated enters the feeding box 21, is buffered, and then filtered by the filter screen 22 before entering the feeding device 3. In this way, the feeding box 21 can buffer the material to be magnetically separated, and the filter screen 22 can filter out impurities such as rocks with larger particle sizes. This prevents the material to be magnetically separated from passing through the feeding device 3, especially the magnetic focusing medium 41, too quickly, shortening the magnetic attraction time of the magnetic material and preventing the magnetic material from being unable to be fully magnetically attracted. The filtration of impurities also prevents blockage in the feeding device 3, especially at the magnetic focusing medium 41.

[0030] Please refer to the reference. Figure 1 Preferably, the feed box 21 includes an inclined plate 211 at its bottom and a feed pipe 212 opposite to the inclined plate 211 and connected to the interior of the feed box 21. The feeding device 3 includes a first pipe 31 and a second pipe 32. The feed pipe 212 is connected to the first pipe 31, and the magnetic focusing medium 41 is detachably arranged in the second pipe 32. In this way, the inclined plate 211 can effectively guide the material to be magnetically separated to slide down towards the first pipe 31. Since the magnetic focusing medium 41 is detachably arranged in the second pipe 32, it is convenient to replace and clean the magnetic focusing medium 41. In particular, compared with taking the magnetic focusing medium 41 out from the upper port of the second pipe 32, the operation of installing and removing the magnetic focusing medium 41 is very convenient and quick.

[0031] Please refer to the reference. Figure 1 and Figure 3Preferably, the first pipe 31 is perpendicular to the second pipe 32, and the second feed pipe extends vertically. This allows the material to be magnetically separated to flow more smoothly towards the magnetic medium 41 and the unloading device 6 using its own weight. A first sealing cover 33, which can be directly or indirectly fixed to the upper part of the second pipe 32, is provided. The first sealing cover 33 has multiple magnetic cleaning channels 331, each used to receive an externally supplied cleaning agent for rinsing the magnetic material on the magnetic medium 41. This cleaning agent can be water, oil, or a water-oil mixture. By providing the first sealing cover 33 with multiple magnetic cleaning channels 331, on the one hand, the first sealing cover 33 can clean the second pipe... The upper part of the second pipe 32 is reliably sealed, especially after the first sealing cover 33 is removed and the inside of the second pipe 32 is thoroughly cleaned before the first sealing cover 33 is installed. On the other hand, the cleaning agent enters the second pipe 32 through each magnetic cleaning channel 331 and passes through the magnetic focusing medium 41. It can clean the magnetic material on the magnetic focusing medium 41 that has not been completely released due to the loss of magnetic attraction and remove it from the magnetic focusing medium 41. This not only discharges the magnetic material in a timely and efficient manner but also prevents the incompletely released magnetic material from accumulating excessively in the magnetic focusing medium 41 and causing blockage. A funnel-shaped third pipe 34 is connected to the bottom of the second pipe 32. The funnel shape of the third pipe 34 helps to increase the falling force of the material to be magnetically separated after magnetic separation.

[0032] Please refer to the reference. Figure 2 Preferably, the unloading device 6 includes a three-way pipe 61, a non-magnetic material unloading valve 62, and a magnetic material unloading valve 63. One branch of the three-way pipe 61 is connected to the third pipe 34. The non-magnetic material unloading valve 62 and the magnetic material unloading valve 63 are respectively installed in the other two branches of the three-way pipe 61. These two branches can be understood as a non-magnetic material discharge pipe and a magnetic material discharge pipe, with their free ends serving as discharge outlets. Therefore, by utilizing the non-magnetic material unloading valve 62 and the magnetic material unloading valve 63, magnetic and non-magnetic substances can be discharged separately according to actual needs, and the discharge of the two substances does not interfere with each other.

[0033] Please refer to the reference. Figure 1 and Figure 5Preferably, the magnetic separator 4 includes a hollow media box 42 and a second sealing cover 43. The media box 42 is arranged in the second pipe 32. The second sealing cover 43 is detachably fixed directly or indirectly to the outside of the second pipe 32 to seal the media box 42 in the second pipe 32. When the magnetic focusing medium 41 needs to be replaced, the second sealing cover 43 is removed. When the magnetic focusing medium 41 is replaced, the second sealing cover 43 is reinstalled and fixed. Multiple magnetic focusing media 41 can be selectively installed or removed relative to the media box 42. The media box 42 can be configured as multiple layers, and each layer can have multiple openings or slots for detachably installing the magnetic focusing media 41. The magnetic focusing media 41 includes media sheets, media disks, and media rods, so that at least one of the media sheets, media disks, and media rods can be arranged in the media box 42. Since the medium box 42 is placed in the second pipe 32, the magnetic medium 41 can be replaced as a whole by extracting or removing the medium box 42 relative to the second pipe 32, or a portion of the magnetic medium 41 can be extracted or removed relative to the medium box 42. Therefore, it is possible to flexibly replace or clean the magnetic medium 41 according to its actual working condition.

[0034] Please refer to the reference. Figure 4 and Figure 6 Preferably, a first sealing strip 35 is provided between the first sealing cover 33 and the upper end of the second pipe 32, and a second sealing strip 44 is provided between the second sealing cover 43 and the outer periphery of the second pipe 32. The first sealing strip 35 and the second sealing strip 44 can be rectangular sealing strips. The first sealing strip 35 and the second sealing strip 44 can respectively achieve excellent sealing between the first sealing cover 33 and the upper end of the second pipe 32 and between the second sealing cover 43 and the outer periphery of the second pipe 32, ensuring that the cleaning agent can reliably enter without leakage, and also ensuring that magnetic and non-magnetic substances will not leak out from the second pipe 32 through the medium box 42.

[0035] Please refer to the reference. Figure 1 and Figure 2Preferably, the iron removal system also includes a feeding device 7 and an intelligent electronic control device 8. It is understood that the intelligent electronic control device 8 can be a control cabinet including controllers such as PLCs and microcontrollers. The feeding device 7 includes a feeding pump 71, a pump inlet pipe 72, a pump outlet pipe 73, and a feeding valve 74. In this invention, all valves can be pneumatic valves. The feeding pump 71 is located between the pump inlet pipe 72 and the pump outlet pipe 73. The feeding valve 74 is used to open and close the connection between the pump outlet pipe 73 and the feeding device 2. The pump outlet pipe 73 is connected to the box passage pipe of the feeding box 21. The feeding pump 71 pumps the material to be magnetically separated generated during the oilfield extraction process through the pump inlet pipe 72 to the box passage pipe through the pump outlet pipe 73. The feeding valve 74 connects the pump outlet pipe 73 to the feeding box 21 so that the feeding box 21 receives the material to be magnetically separated. The intelligent electronic control device 8 is connected to the drive mechanism 52, the non-magnetic material unloading valve 62, and the magnetic material... The discharge valve 63, feed pump 71, and feed valve 74 are all electrically connected. When the intelligent electronic control device 8 controls the drive mechanism 52 to drive the sorting magnetic system 51 to approach the magnetic medium 41 and controls the non-magnetic material discharge valve 62, feed pump 71, and feed valve 74 to open while the magnetic material discharge valve 63 is closed, the material to be magnetically separated can pass through the magnetic medium 41, the magnetic material is magnetically attracted, and the non-magnetic material is discharged. When the intelligent electronic control device 8 controls the drive mechanism 52 to drive the sorting magnetic system 51 to move away from the magnetic medium 41 and controls the magnetic material discharge valve 63 to open while the feed pump 71, feed valve 74, and non-magnetic material discharge valve 62 are closed, the magnetic material attracted to the magnetic medium 41 can be released and discharged, or the cleaning agent entering through each magnetic material cleaning channel 331 can clean the magnetic material on the magnetic medium 41 that has not been completely released, so that both can be discharged at the same time. Therefore, by intelligently controlling the operation of the corresponding pumps and valves through the intelligent electronic control device 8, the separation and discharge of non-magnetic and magnetic materials can be achieved automatically and efficiently.

[0036] Please refer to the reference. Figure 1 and Figure 2 Preferably, the sorting device 5 includes a sorting box 53, in which a sorting magnetic system 51 is arranged. A pair of rollers 54 are fixedly connected to the sorting box 53. The support 1 has a pair of guide rails 11 that respectively cooperate with the rollers 54. The drive mechanism 52 includes a hydraulic cylinder 521, whose cylinder body is supported by the support 1. The piston rod 5211 of the hydraulic cylinder 521 is telescopically connected to the sorting box 53. The drive mechanism 52 can also be understood as an electro-hydraulic actuator. The piston rod 5211 drives the analysis frame to reciprocate relative to the magnetic focusing medium 41. In this way, because the telescopic movement of the piston rod 5211 of the hydraulic cylinder 521 is accurate and reliable, the relative movement of the sorting magnetic system 51 relative to the magnetic focusing medium 41 is ensured to be accurate and reliable.

[0037] Specifically, the magnetic material is ferromagnetic material, especially iron. In addition, ferromagnetic materials can also include pure metals such as cobalt and nickel, iron-based alloys such as carbon steel and silicon steel, and iron oxides such as magnetite. The material to be magnetically separated is a liquid slurry, which contains not only small particles but also drilling fluid or hydraulic fluid. Therefore, the iron removal system provided by this invention is particularly suitable for oilfield applications where drill bits are subjected to wear and tear during drilling, producing ferromagnetic materials such as iron, and where drilling fluid needs to be recycled.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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 this utility model.

Claims

1. An iron removal system for oilfield extraction, characterized in that, include: support; The feeding device, infeeding device, magnetic separation device, sorting device and unloading device are supported by the bracket; The feeding device is used to receive materials to be magnetically separated generated during the oilfield extraction process. The feeding device is used to receive the material to be magnetically separated from the feeding device; The magnetic separator includes a plurality of magnetic media that are detachably installed in the feeding device; The sorting device includes a sorting magnetic system and a driving mechanism. The driving mechanism drives the sorting magnetic system to move relative to the outside of the feeding device, so that the sorting magnetic system approaches or moves away from the magnetic focusing medium, so that the magnetic focusing medium is either accepted or unaffected by the sorting magnetic system. When the sorting magnetic system approaches the magnetic focusing medium, the magnetic focusing medium magnetically attracts the magnetic substances in the material to be magnetically separated and allows non-magnetic substances to pass through. When the sorting magnetic system moves away from the magnetic focusing medium, the magnetic focusing medium releases the magnetic substances. The unloading device is connected to the feeding device and is used to discharge the magnetic material and the non-magnetic material respectively.

2. The iron removal system according to claim 1, characterized in that, The feeding device includes a feeding box and a filter screen arranged in the feeding box. The material to be magnetically separated enters the feeding box, is buffered, filtered by the filter screen, and then enters the feeding device.

3. The iron removal system according to claim 2, characterized in that, The feeding box includes an inclined plate at its bottom and a feeding pipe opposite to the inclined plate and connected to the inside of the feeding box. The feeding device includes a first pipe and a second pipe. The feeding pipe is connected to the first pipe, and the magnetic medium is detachably installed in the second pipe.

4. The iron removal system according to claim 3, characterized in that, The first pipe is perpendicular to the second pipe, and the second feed pipe extends vertically. A first sealing cap is provided at the upper part of the second pipe, and multiple magnetic cleaning channels are provided on the first sealing cap. Each of the magnetic cleaning channels is used to receive cleaning agent supplied externally for rinsing the magnetic material on the magnetic medium. A funnel-shaped third pipe is connected to the bottom of the second pipe.

5. The iron removal system according to claim 4, characterized in that, The unloading device includes a three-way pipe, a non-magnetic material unloading valve, and a magnetic material unloading valve. One of the three-way pipes is connected to the third pipe, and the non-magnetic material unloading valve and the magnetic material unloading valve are respectively installed in the other two pipes of the three-way pipe.

6. The iron removal system according to claim 4, characterized in that, The magnetic separator includes a hollow medium box and a second sealing cover. The medium box is arranged in the second pipe. The second sealing cover is detachably fixed to the outside of the second pipe to seal the medium box in the second pipe. A plurality of magnetic media can be selectively installed or removed relative to the medium box. The magnetic media includes media sheets, media disks and media rods.

7. The iron removal system according to claim 6, characterized in that, A first sealing strip is provided between the first sealing cap and the upper end of the second pipe, and a second sealing strip is provided between the second sealing cap and the outer periphery of the second pipe.

8. The iron removal system according to claim 5, characterized in that, The iron removal system also includes a feeding device and an intelligent electronic control device. The feeding device includes a feeding pump, an inlet pipe, an outlet pipe, and a feeding valve. The feeding pump is located between the inlet pipe and the outlet pipe. The feeding valve is used to open and close the connection between the outlet pipe and the feeding device. The outlet pipe is connected to the feed box's through-pipe. The feeding pump pumps the material to be magnetically separated generated during the oilfield extraction process through the inlet pipe, and then through the outlet pipe to the through-pipe. The feeding valve connects the outlet pipe to the feed box so that the feed box receives the material to be magnetically separated. The intelligent electronic control device is electrically connected to the drive mechanism, the non-magnetic material unloading valve, the magnetic material unloading valve, the feeding pump, and the feeding valve. When the intelligent electronic control device controls the... When the drive mechanism drives the sorting magnetic system to approach the magnetic focusing medium and controls the opening of the non-magnetic material unloading valve, the feeding pump, and the feeding valve, while the magnetic material unloading valve is closed, the material to be magnetically separated can pass through the magnetic focusing medium. The magnetic material is magnetically attracted, and the non-magnetic material is discharged. When the intelligent electronic control device controls the drive mechanism to drive the sorting magnetic system away from the magnetic focusing medium and controls the opening of the magnetic material unloading valve, while the feeding pump, the feeding valve, and the non-magnetic material unloading valve are all closed, the magnetic material attracted to the magnetic focusing medium can be released and discharged, or the cleaning agent entering through each of the magnetic material cleaning channels can clean the magnetic material that has not been completely released from the magnetic focusing medium, so that both can be discharged simultaneously.

9. The iron removal system according to claim 1, characterized in that, The sorting device includes a sorting box, in which the sorting magnetic system is arranged. A pair of rollers are fixedly connected to the sorting box. The support is provided with a pair of guide rails that respectively cooperate with the pair of rollers. The driving mechanism includes a hydraulic cylinder. The cylinder body of the hydraulic cylinder is supported by the support. The piston rod of the hydraulic cylinder is telescopically connected to the sorting box. The piston rod drives the analysis frame to reciprocate relative to the magnetic medium.

10. The iron removal system according to claim 1, characterized in that, The magnetic material is a ferromagnetic material, and the material to be magnetically separated is a slurry, which also includes drilling fluid or hydraulic fluid.

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