Anti-blocking oil well pump for oil exploitation

Abstract

The application belongs to the technical field of oil well pumps, and particularly relates to an anti-blocking oil well pump for oil exploitation in an oil well, which comprises a pipe, the inside of the pipe is provided with a cylinder, the lower part of the pipe is detachably connected with a filter screen, the lower part of the cylinder is provided with a cleaning mechanism for realizing the self-cleaning function of the filter screen, the upward and downward movement of the driving rod drives the movement of the fixed column, the fixed column slides in contact with the arc groove through the slide column, so as to drive the forward and reverse rotation of the multiple groups of scrapers arranged on the side of the rotating cylinder, the self-cleaning work of the filter screen can be realized, the filter screen can fully filter the impurities such as rock fragments and sand particles in the oil, the plugging of the oil well pump can be avoided, the form of the conveying pipe can be changed, the impurities in the oil can be finely filtered again, the impurities can be discharged and then deposited at the bottom of the filter screen, and the efficiency of oil feeding and oil discharging can be improved.

Description

Technical Field

[0001] This invention belongs to the field of oil pump technology, specifically an anti-clogging oil pump for downhole oil extraction. Background Technology

[0002] In the process of oil well extraction, the oil pump is one of the key pieces of equipment.

[0003] Oil pumps are generally made of high-strength alloy materials, which can ensure sufficient strength and corrosion resistance in complex downhole environments. The main body of the oil pump is equipped with components such as plungers, pump barrels, and inlet and outlet valves to ensure the realization of the oil pumping function.

[0004] In current technologies, when oil is extracted, the oil pumps operate in underground oil layers, and impurities such as rock fragments and sand particles are often mixed in with the oil. These impurities enter the pump and can jam key components such as plungers and valve balls, preventing the oil pumps from properly sucking and discharging oil, or even directly damaging the equipment and interrupting oil extraction. Existing oil pumps generally use simple filtration devices to filter impurities. However, since oil pumps typically need to be used for a long time when extracting oil, the filtration devices are prone to clogging during prolonged use. After long-term use, the effect of filtering impurities will decrease, which will cause the oil pump to become clogged. Therefore, this invention provides an anti-clogging oil pump for downhole oil extraction. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the present invention provides an anti-clogging oil pump for downhole oil extraction, including an oil pipe, a cylinder installed inside the oil pipe, and a filter screen detachably connected to the bottom of the oil pipe, and a cleaning mechanism for realizing the self-cleaning function of the filter screen is configured below the cylinder. The cleaning mechanism includes an active rod, with a fixed column fixedly connected to the lower end of the active rod. A sliding column is fixedly connected to the surface of the fixed column, and one end of the sliding column slidably contacts a rotating cylinder. An arc groove is provided inside the rotating cylinder. A scraper is slidably arranged on the inner wall of the filter screen. The surface of the scraper is arc-shaped and has adsorption mesh holes. The rotation of the rotating cylinder can drive the scraper to rotate in both directions.

[0007] Preferably, the cleaning mechanism further includes a telescopic column fixedly connected to the surface of the rotating cylinder, a connecting rod slidably connected inside the telescopic column, one end of the connecting rod being fixedly connected to the scraper, a top spring being provided inside the telescopic column, the active rod being slidably connected to the rotating cylinder, and a sealing ring being provided at the sliding position, the bottom of the rotating cylinder being rotatably connected to the filter screen, and a sedimentation tank being provided at the bottom of the filter screen.

[0008] Preferably, the interior of the cylinder is equipped with a gain mechanism for assisting the cleaning mechanism in filtering oil. The gain mechanism includes an arc plate fixedly connected to the bottom of the cylinder. An oil inlet valve is provided at the middle position of the arc plate. Multiple sets of sealing rods are slidably connected inside the arc plate. One end of the sealing rod is slidably engaged with a sealing plate. A return spring is provided at the sliding position of the sealing rod and the arc plate. A discharge groove is provided between the arc plate and the cylinder.

[0009] Preferably, a fixed cylinder is also fixedly connected inside the cylinder body, and a connecting plate is slidably arranged inside the fixed cylinder. Multiple sets of conveying pipes are movably engaged inside the connecting plate. The upper end of the conveying pipe is fixedly connected to the fixed cylinder, while the lower end is slidably connected to the fixed cylinder. A push rod is fixedly connected above the connecting plate, and a support plate is fixedly connected above the push rod.

[0010] Preferably, the support plate has an arc groove at its lower part, and an adsorption strip is rotatably connected inside the arc groove. The support plate has an inclined groove at a position away from the center, and the inclined groove is inclined at the same angle as the inclination angle of the conveying pipe when it is straight. The push rod and the fixed cylinder are slidably connected, and a sealing gasket is provided at the sliding position.

[0011] Preferably, an oil extraction mechanism is slidably arranged inside the cylinder. The oil extraction mechanism includes a plunger cylinder, a pull rod is arranged above the plunger cylinder, an upper oil outlet valve and a lower oil outlet valve are respectively arranged inside the plunger cylinder, a partition is arranged between the upper oil outlet valve and the lower oil outlet valve, and a number of through holes are opened on the surface of the partition. A scraper is detachably connected to the lower part of the plunger cylinder.

[0012] Preferably, the upper end of the active rod is fixedly connected to the pull rod, a sealing ring is provided between the upper part of the cylinder and the oil pipe, the diameter of the filter mesh on the outer side of the filter screen is larger than the diameter of the mesh on the inner wall, and a sealing gasket is provided at the sliding position of the connecting rod and the telescopic column.

[0013] Preferably, a sealing ring is provided at the connection position between the upper end of the conveying pipe and the fixed cylinder, and a sealing ring is also provided at the sliding position between the lower end of the conveying pipe and the fixed cylinder, so that the sliding position between the lower end of the conveying pipe and the fixed cylinder always remains unchanged.

[0014] Preferably, the plunger cylinder is fixedly connected to the drive rod, the upper oil outlet valve and the lower oil outlet valve are slidably sleeved on the surface of the drive rod, and the scraper is made of high-strength wear-resistant material.

[0015] Preferably, multiple sets of absorbent cotton are installed on the surface of the absorbent strip, the inclined groove is located on one side of the arc groove opened in the support plate, and the upper surface of the support plate is arc-shaped.

[0016] The beneficial effects of this invention are as follows: 1. The present invention discloses an anti-clogging oil pump for downhole oil extraction, wherein the moving rod drives the fixed column to move by moving up and down. The fixed column slides through the contact groove of the sliding column, thereby driving multiple sets of scrapers on the side of the rotating cylinder to rotate in both directions. This enables the filter screen to perform self-cleaning, improves the filter screen's ability to fully filter impurities such as rock fragments and sand particles in the oil, and avoids clogging of the oil pump.

[0017] 2. The anti-clogging oil pump for downhole oil extraction described in this invention, through the change in the shape of the delivery pipe, can not only further finely filter impurities in the oil, but also allow the discharged impurities to settle at the bottom of the filter screen, and improve the efficiency of oil intake and discharge, thereby improving the efficiency of downhole oil extraction by the oil pump and preventing impurities in the oil from affecting the normal operation of the plunger cylinder and multiple sets of valve balls. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a diagram of the internal structure of the oil pipe removal device of the present invention; Figure 3 This is a schematic diagram of the internal structure of the oil pipe and cylinder in this invention. Figure 4 This is a schematic diagram of the cleaning mechanism in this invention; Figure 5 In this invention Figure 4 Exploded view; Figure 6 This is a schematic diagram of the gain mechanism in this invention; Figure 7 This is a schematic diagram of the structure of the support plate and the adsorption strip in this invention; Figure 8 This is a schematic diagram of the oil pumping mechanism in this invention; Figure 9 This is the present invention. Figure 6 A magnified view of a section at point A in the middle; Figure 10 This is the present invention. Figure 7 A magnified view of a section at point B in the middle; Figure 11 This is a diagram showing the motion state of the conveying pipe in this invention; In the diagram: 1. Oil pipe; 2. Tie rod; 3. Filter screen; 4. Cylinder; 5. Sealing ring; 6. Cleaning mechanism; 601. Driving rod; 602. Fixed column; 603. Sliding column; 604. Rotating cylinder; 605. Arc groove; 606. Connecting rod; 607. Scraper; 608. Telescopic column; 7. Oil extraction mechanism; 701. Plunger cylinder; 702. Upper oil outlet valve; 703. Baffle plate; 704. Lower oil outlet valve; 705. Scraper; 8. Gain mechanism; 801. Support plate; 802. Adsorption bar; 803. Inclined groove; 804. Fixed cylinder; 805. Push rod; 806. Connecting plate; 807. Delivery pipe; 808. Sealing rod; 809. Sealing plate; 810. Arc plate; 811. Oil inlet valve. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] like Figures 1 to 5 As shown in the embodiment of the present invention, an anti-clogging oil pump for downhole oil extraction includes an oil pipe 1, a cylinder 4 installed inside the oil pipe 1, and a filter screen 3 detachably connected to the lower part of the oil pipe 1. A cleaning mechanism 6 for realizing the self-cleaning function of the filter screen 3 is configured at the lower part of the cylinder 4. The cleaning mechanism 6 includes an active rod 601, with a fixed column 602 fixedly connected to the lower end of the active rod 601. A sliding column 603 is fixedly connected to the surface of the fixed column 602. One end of the sliding column 603 slidably contacts a rotating cylinder 604. An arc groove 605 is provided inside the rotating cylinder 604. A scraper 607 is slidably arranged on the inner wall of the filter screen 3. The surface of the scraper 607 is arc-shaped and has adsorption mesh holes. The rotation of the rotating cylinder 604 can drive the scraper 607 to rotate in both directions.

[0022] This invention takes into account that during downhole oil extraction, the oil contains solid impurities such as rock fragments and sand. Direct extraction of the oil can easily cause these solid impurities to jam key components such as the plunger and valve ball, affecting the efficiency of the pump in collecting downhole oil and potentially damaging the pump itself. Therefore, by installing a filter screen 3 below the tubing 1, large solid impurities in the oil can be initially filtered when oil collection begins. Furthermore, the reciprocating motion of the drive rod 601 drives the fixed column 602 to move up and down inside the rotating cylinder 604. The sliding column 602 moves up and down, causing the sliding column 603 to move. Since the rotating cylinder 604 has an arc groove 605 inside, the sliding column 603 slides inside the arc groove 605 during its up and down movement. It should be noted that since the active rod 601 is fixed, the orientation of the sliding column 603 on the side of the fixed column 602 during its up and down movement is also fixed. Therefore, when the sliding column 603 slides inside the arc groove 605, it can apply a thrust to the rotating cylinder 604, causing the rotating cylinder 604 to rotate. Furthermore, since the sliding column 603 moves up and down, the rotating cylinder 604 can rotate in both directions. Furthermore, since the rotating cylinder 604 can drive the scraper 607 to rotate in both directions, and the scraper 607 is slidably connected to the inner wall of the filter screen 3, the rotation of the scraper 607 can scrape the inner wall of the filter screen 3, thereby preventing the filter holes on the surface of the filter screen 3 from becoming clogged. This allows oil to flow smoothly into the interior of the filter screen 3. It should be noted that because the surface of the scraper 607 is arc-shaped, the width of the two sides of the scraper 607 is smaller than the width in the middle, making the two sides flat and in contact with the inner wall of the filter screen 3. This allows the scraper 607 to easily scrape the interior of the filter screen 3, and because it can adhere to the inner wall of the filter screen 3... The impurities are all special impurities such as sand fragments and wax crystals, which can be easily scraped off by the scraper 607. By opening adsorption mesh holes on the surface of the scraper 607 and setting composite adsorption material inside the adsorption mesh holes, when the oil enters the interior after being filtered by the filter screen 3, the forward and reverse rotation of the scraper 607 can not only scrape the inner wall of the filter screen 3, removing the special impurities adhering to the inner wall of the filter screen 3 and preventing the filter mesh holes of the filter screen 3 from becoming clogged, but also rotate to adsorb the special impurities in the oil through the composite adsorption material in the adsorption mesh holes, thereby improving the filtration effect of impurities in the oil and preventing the accumulation of a large number of impurities from affecting the normal operation of the oil pump.

[0023] like Figures 3 to 5As shown, the cleaning mechanism 6 also includes a telescopic column 608 fixedly connected to the surface of the rotating cylinder 604. A connecting rod 606 is slidably connected inside the telescopic column 608. One end of the connecting rod 606 is fixedly connected to the scraper 607. A top spring is provided inside the telescopic column 608. The active rod 601 is slidably connected to the rotating cylinder 604, and a sealing ring is provided at the sliding position. The bottom of the rotating cylinder 604 is rotatably connected to the filter screen 3, and a sedimentation tank is provided at the bottom of the filter screen 3.

[0024] During operation, when the drive rod 601 moves up and down, it slides through the sliding post 603 on the surface of the fixed post 602 within the arc groove 605, thereby driving the rotating cylinder 604 to rotate in both directions. The rotation of the rotating cylinder 604 drives the telescopic post 608 to rotate, which in turn drives the internally sliding connecting rod 606 to rotate. The rotation of the connecting rod 606 drives the scraper 607 to rotate, scraping away special impurities adhering to the inner wall of the filter screen 3, thus preventing the filter screen pores of the filter screen 3 from becoming clogged. It should be noted that when the scraper 607 scrapes the inner wall of the filter screen 3, some small solid impurities other than special impurities may still adhere to the mesh openings of the filter screen 3. If the scraper 607 is directly rotated in both directions to wipe the inner wall of the filter screen 3, it may cause damage to the scraper 607. Therefore, by sliding the telescopic post 608 on the surface of the connecting rod 606 and installing a top spring inside the telescopic post 608, the scraper can remove these impurities. When the scraper 607 comes into contact with solid impurities during the wiping process, the solid impurities will push the scraper 607 open, causing one end of the connecting rod 606 on one side of the scraper 607 to slide a distance inside the telescopic column 608. At this time, the solid impurities will be between the filter screen 3 and the scraper 607. When the scraper 607 continues to rotate, the solid impurities will be rubbed and rotate until they are rubbed into the filter screen holes of the filter screen 3. When the oil re-enters the filter screen 3, the solid impurities will follow the oil and enter the filter screen 3 again. It should be noted that because the bottom of the filter screen 3 has multiple sedimentation tanks, when the solid impurities exist inside the filter screen 3 for a certain period of time, due to their own gravity and external pressure, the solid impurities will fall into the sedimentation tanks inside the filter screen 3 for sedimentation and will not be drawn out with the oil. This can effectively avoid the situation of the plunger and valve ball getting stuck and prevent the oil pump from getting blocked. Furthermore, since the scraper 607 is always in contact with the inner wall of the filter screen 3, when solid impurities are inside the settling tank, even if the impact and pressure of external oil cause the settled solid impurities to flow, the forward and reverse rotation of the scraper 607 will also stir the oil inside the filter screen 3 to a certain extent, so that the impurities are always in the center of the filter screen 3, allowing the solid impurities to continue to settle without causing too much fluctuation to the solid impurities, thereby avoiding the settled solid impurities from affecting the normal filtering effect of the filter screen 3 on the oil in the oil layer.

[0025] like Figures 6 to 7 and Figure 9 As shown, the interior of the cylinder 4 is equipped with a gain mechanism 8 for assisting the cleaning mechanism 6 in filtering oil. The gain mechanism 8 includes an arc plate 810 fixedly connected to the bottom of the cylinder 4. An oil inlet valve 811 is provided in the middle of the arc plate 810. Multiple sets of sealing rods 808 are slidably connected inside the arc plate 810. One end of the sealing rod 808 is slidably engaged with a sealing plate 809. A return spring is provided at the sliding position of the sealing rod 808 and the arc plate 810. A discharge groove is provided between the arc plate 810 and the cylinder 4.

[0026] During operation, when discharging oil, the inlet valve 811 moves downward from the inside of the cylinder 4 until it is inserted into the inside of the arc plate 810 to form a seal. Since the inlet valve 811 slides on the surface of the drive rod 601 when it moves downward, its vertical position remains fixed. Therefore, when the inlet valve 811 moves downward, it pushes the multiple sets of sealing rods 808 inside the arc plate 810 to slide. The sliding of the sealing rods 808 causes the sealing plate 809 to slide on the surface of the arc plate 810. When the sealing plate 809 moves to the discharge groove opened between the cylinder 4 and the arc plate 810, the cylinder 4 is completely sealed, facilitating the discharge of oil. It should be noted that during the oil inlet process, the inlet valve 811 will slide on the surface of the drive rod 601 under pressure. Slide upwards, and the oil inlet valve 811 moves upwards and no longer contacts one end of the plugging rod 808. At this time, the plugging rod 808 will drive the plugging plate 809 to move away from the position of the discharge groove under the action of the return spring, so that the discharge groove is opened. At this time, after the oil enters the interior of the cylinder 4, the solid impurities contained therein will be on the surface of the arc plate 810. Since the upper surface of the arc plate 810 is arc-shaped, the solid impurities will move towards the periphery of the arc plate 810 when flowing, and then be discharged from the position of the discharge groove, so that the impurities return to the interior of the filter screen 3 for sedimentation or discharge, which can further improve the effect of treating solid impurities in the oil and prevent impurities from clogging the oil inlet valve 811 and the arc plate 810, thereby improving the overall mining efficiency of the pump. Furthermore, when solid impurities can no longer flow upwards from the bottom of the cylinder 4, the continuous up-and-down movement of the oil inlet valve 811 will move continuously in the oil, and can also agitate the oil pumped into the cylinder 4 to a certain extent, which can further improve the effect of solid impurity treatment. It should be noted that since one end of the sealing rod 808 is slidably engaged with the sealing plate 809, when the sealing rod 808 continuously drives the sealing plate 809 to slide back and forth on the surface of the arc plate 810, the sealing plate 809 can also scrape around the arc plate 810 to a certain extent, and can further agitate the oil entering the cylinder 4, so that the impurities flow better in the oil and are conveniently discharged from the discharge tank, thus improving the effect of solid impurity treatment in the oil.

[0027] like Figures 6 to 7 and Figure 10 As shown, a fixed cylinder 804 is also fixedly connected inside the cylinder 4. A connecting plate 806 is slidably arranged inside the fixed cylinder 804. Multiple sets of conveying pipes 807 are movably engaged inside the connecting plate 806. The upper end of the conveying pipe 807 is fixedly connected to the fixed cylinder 804, while the lower end is slidably connected to the fixed cylinder 804. A push rod 805 is fixedly connected above the connecting plate 806, and a support plate 801 is fixedly connected above the push rod 805.

[0028] During operation, in the oil inlet process, the drive rod 601 moves upward, driving the support plate 801 upward. The upward movement of the support plate 801 drives multiple sets of connecting plates 806 to move upward synchronously via the push rod 805. Since multiple sets of delivery pipes 807 are slidably engaged inside the connecting plates 806, and because the delivery pipes 807 are made of a well-sealed elastic material, with their upper ends fixedly connected to the fixed cylinder 804 and their lower ends slidably connected to it, the upward movement of the connecting plates 806 causes the delivery pipes 807 to be in a spirally bent state. It should be noted that... Since multiple sets of conveying pipes 807 are installed inside the fixed cylinder 804, when oil enters the cylinder 4, the conveying pipes 807 will convey the oil in a dispersed state. The spiral bending state can generate a vortex effect when the oil flows, which can make the dispersed oil flow evenly and prevent impurities from concentrating and moving upward with the oil. When impurities flow in the spiral bending state of the conveying pipes 807, the inner wall of the conveying pipes 807 can also intercept the impurities to a certain extent, thereby further filtering the impurities. It should be noted that after the filtered oil is discharged from the outlet above the conveying pipe 807, the oil will flow in a dispersed spiral towards the bottom of the support plate 801, which can accelerate the oil intake efficiency. After the oil intake is completed, the drive rod 601 drives the support plate 801 to move downward. The downward movement of the support plate 801 drives the connecting plate 806 to move downward through the push rod 805. At this time, the connecting plate 806 will again drive multiple sets of conveying pipes 807 to move synchronously, so that the conveying pipes 807 change from a spirally curved state to a straight state. At this time, the downward movement of the support plate 801 will first come into contact with the oil conveyed by the spiral, thereby squeezing the oil and causing some of it to be squeezed out. Oil flows rapidly from the inside of the straight conveying pipe 807 to the lower oil inlet, causing the oil flowing through the conveying pipe 807 to impact its inner wall. This causes the oil inside the conveying pipe 807 to return to the area below the oil inlet, above the arc plate 810. It should be noted that because the distance between the oil inlets below the conveying pipe 807 is relatively short at this time, when the conveying pipe 807 changes from a spiral bent state to a straight state, the conveying pipe 807 is in an inclined state. This allows impurities to be concentrated and rushed towards the arc plate 810, and the impurities on the surface of the arc plate 810 can be flushed to the surroundings, making it easier for the impurities to be discharged into the interior of the filter screen 3 for sedimentation. It should be reiterated that when the support plate 801 moves down and comes into contact with the oil being transported, and squeezes some of the oil, the oil inlet valve 811 and the arc plate 810 are in a tight fit, making the inside of the cylinder 4 completely sealed. At this time, even if some oil flows down to the top of the arc plate 810, it will rise again as the support plate 801 continues to move down. At this time, impurities have been partially isolated by the fixed cylinder 804, and the conveying pipe 807 is in a straight state, with the oil inlet below the conveying pipe 807 concentrated. This not only allows for the rapid transport of oil through multiple sets of straight conveying pipes 807, but also disperses the rapidly transported oil, preventing it from directly impacting the upper components and protecting them.

[0029] like Figures 6 to 7 and Figures 10 to 11 As shown, an arc groove is provided below the support plate 801, and an adsorption strip 802 is rotatably connected inside the arc groove. An inclined groove 803 is provided at a position away from the center of the support plate 801, and the inclined groove 803 is inclined. The inclination angle is the same as the inclination angle of the conveying pipe 807 when it is straight. The push rod 805 is slidably connected to the fixed cylinder 804, and a sealing gasket is provided at the sliding position.

[0030] During operation, when the support plate 801 moves downward during the oil discharge process, the support plate 801 will cause the adsorption strip 802 to come into contact with the oil being transported from the oil outlet above the conveying pipe 807. Since the support plate 801 has an arc groove at its bottom, when the oil comes into contact with the arc groove, some of the oil will slide inside the arc groove. And since the adsorption strip 802 is rotated inside the arc groove, when the oil slides out of the arc groove, the adsorption strip 802 will rotate under the thrust of the oil, thereby further adsorbing some special impurities in the oil, thereby further improving the cleanliness of the oil and avoiding blockage of the oil pump. Until the oil is completely in contact with the support plate 801, the adsorption strip 802 will no longer rotate. It should be noted that since the adsorption strip 802 is set in a hexagonal shape, even if the support plate 801 moves downward and squeezes the oil, it will not affect the normal upward flow of the oil and will not cause any obstruction to the oil extraction. It should be noted that the inclined groove 803 is set at an angle, and the angle of inclination is the same as that of the conveying pipe 807 when it is straight. When the conveying pipe 807 is straight, the continuous squeezing of the support plate 801 will cause the oil above the arc plate 810 to return to the top of the support plate 801, which is convenient for suction. At this time, some oil will also flow out from the inclined groove 803 opened inside the support plate 801. This not only filters impurities, but also further diverts the oil, thereby improving the oil extraction effect.

[0031] like Figures 1 to 2 and Figure 8 As shown, an oil extraction mechanism 7 is slidably arranged inside the cylinder 4. The oil extraction mechanism 7 includes a plunger cylinder 701. A pull rod 2 is arranged above the plunger cylinder 701. An upper oil outlet valve 702 and a lower oil outlet valve 704 are respectively arranged inside the plunger cylinder 701. A partition 703 is arranged between the upper oil outlet valve 702 and the lower oil outlet valve 704. Several sets of through holes are opened on the surface of the partition 703. A scraper 705 is detachably connected to the lower part of the plunger cylinder 701.

[0032] During operation, the external lever 2 is pulled up and down inside the oil pipe 1. This movement of lever 2 causes the plunger cylinder 701 to slide inside the cylinder 4. The sliding of the plunger cylinder 701 allows for the collection of oil from the oil layer. During pumping, lever 2 causes the plunger cylinder 701 to move upwards inside the cylinder 4. This upward movement of the plunger cylinder 701 continuously increases the space between it and the fixed cylinder 804, thereby drawing oil out of the oil layer under pressure. It should be noted that a baffle 703 is installed between the upper outlet valve 702 and the lower outlet valve 704, with several sets of through holes on its surface. When the plunger cylinder 701 moves downwards, the lower outlet valve 704 opens, allowing oil to enter the plunger cylinder 701. When the oil moves upwards again, it passes through the baffle 703, at which point the baffle 703 can also... To a certain extent, the oil continues to be filtered for impurities, further improving its cleanliness and preventing blockages in the oil pump. It should be noted that by installing a scraper 705 below the plunger cylinder 701, the scraper 705 scrapes the inside of the cylinder 4 as the plunger cylinder 701 moves up and down. This prevents excessive impurities from adhering to the inner wall of the cylinder 4, which would hinder the reciprocating movement of the plunger cylinder 701. This effectively improves the smoothness of the plunger cylinder 701's movement. Furthermore, the impurities scraped off by the scraper 705 are discharged again above the arc plate 810 through the straight conveying pipe 807 when the support plate 801 moves downwards, allowing the impurities to flow back into the filter screen 3 for sedimentation or discharge. This effectively improves the overall cleanliness of the oil pump during operation, preventing blockages.

[0033] like Figures 4 to 5 As shown, the upper end of the active rod 601 is fixedly connected to the pull rod 2. A sealing ring 5 is provided between the upper part of the cylinder 4 and the oil pipe 1. The diameter of the filter mesh on the outer side of the filter screen 3 is larger than the diameter of the mesh on the inner wall. A sealing gasket is provided at the sliding position of the connecting rod 606 and the telescopic column 608.

[0034] During operation, because the diameter of the filter mesh on the outer side of filter screen 3 is larger than that on the inner wall, when oil enters the interior of filter screen 3 from the oil layer, the diameter of the filter mesh 3 decreases from the outside to the inside. This increases the flow rate of the oil, allowing it to fully contact and impact the inner wall of the mesh, thus achieving self-cleaning of filter screen 3 and preventing blockage of the oil pump. It should be noted that when the pull rod 2 drives the plunger cylinder 701 and the active rod 601 to descend, the oil inlet valve 811 and the arc plate 810 are in a tight fit, and at this time, some of the oil that has entered the interior of filter screen 3... As the oil is drawn away by the movement of the plunger cylinder 701, the oil inside the filter screen 3 may not be at full capacity. At this time, when the fixed column 602 drives the rotating cylinder 604 to rotate via the sliding column 603, the rotating cylinder 604 can rotate more easily, thereby driving the scraper 607 to scrape the inner wall of the filter screen 3. Since the oil is not being drawn out by the reciprocating motion of the plunger cylinder 701, the rotating scraper 607 can better adsorb impurities in the oil inside the filter screen 3 through the adsorption mesh, improving the cleanliness of the oil drawn out when the plunger cylinder 701 moves upward next time, and accelerating the sedimentation of impurities in the oil.

[0035] like Figures 4 to 5 As shown, a sealing ring is provided at the connection position between the upper end of the conveying pipe 807 and the fixed cylinder 804, and a sealing ring is also provided at the sliding position between the lower end of the conveying pipe 807 and the fixed cylinder 804. The sliding position between the lower end of the conveying pipe 807 and the fixed cylinder 804 remains unchanged.

[0036] During operation, by setting multiple sets of sealing rings between the fixed cylinder 804 and the delivery pipe 807, impurities can be prevented from entering the interior of the fixed cylinder 804, thus affecting the normal bending and straightening of the delivery pipe 807. This makes the delivery pipe 807 guide oil more smoothly and improves the oil extraction effect of the oil pump. It should be noted that when the support plate 801 drives the connecting plate 806 to move up and down through the push rod 805, the active rod 601 and the push rod 805 are also fixedly connected, so that the support plate 801, the push rod 805 and the connecting plate 806 form a whole. This can drive the multiple sets of delivery pipes 807 to move synchronously more smoothly, thus avoiding affecting the normal collection of oil. It should be noted again that since the sliding position of the lower part of 807 and the fixed cylinder 804 remains unchanged, when the connecting plate 806 drives the conveying pipe 807 to move up and down to bend or straighten, the lower part of the conveying pipe 807 is always in a concentrated state, which allows the conveying pipe 807 to better divert oil while improving the concentrated flow of oil, and to better filter and treat impurities.

[0037] like Figure 8As shown, the plunger cylinder 701 is fixedly connected to the drive rod 601, the upper oil outlet valve 702 and the lower oil outlet valve 704 are slidably sleeved on the surface of the drive rod 601, and the scraper 705 is made of high-strength wear-resistant material.

[0038] During operation, when the pull rod 2 drives the drive rod 601 to move up and down, the drive rod 601 passes through the upper oil outlet valve 702, the lower oil outlet valve 704, and the oil inlet valve 811 respectively, so that the drive rod 601 can position the three valves and prevent them from shifting position during movement, thus preventing the sealing work from being unable to be performed in time. It should be noted that since the scraper 705 is arranged in a strip shape, when the scraper 705 moves up and down with the plunger cylinder 701, the impurities scraped off the side wall of the cylinder 4 will fall from the position of the scraper 705 onto the surface of the lower support plate 801 and the fixed cylinder 804, thus facilitating collection. Furthermore, by setting a sealing ring 5 between the oil pipe 1 and the cylinder 4, oil leakage can be prevented from affecting the overall oil pumping effect of the oil pump.

[0039] like Figure 7 and Figure 10 As shown, multiple sets of absorbent cotton are installed on the surface of the absorbent strip 802, and the inclined groove 803 is located on one side of the arc groove opened in the support plate 801. The upper surface of the support plate 801 is arc-shaped.

[0040] During operation, when the drive rod 601 drives the support plate 801 to move up and down reciprocally, the pressure exerted by the support plate 801 on the oil causes the adsorption cotton on the surface of multiple adsorption strips 802 to adsorb and filter impurities in the oil. It should be noted that since the inclined groove 803 is located on one side of the arc groove in the support plate 801, when the oil is discharged from the oil outlet above the delivery pipe 807 and passes through the inclined groove 803, some of it cannot be completely diverted by the inclined groove 803. At this time, some oil will flow from the side of the inclined groove 803 to the position of the adsorption strip 802, so that the adsorption strip 802 can continue to fully adsorb special impurities in the oil, which can effectively improve the cleanliness of the oil and prevent the oil pump from becoming clogged.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clog-resistant oil pump for downhole oil extraction, characterized in that: It includes an oil pipe, inside which a cylinder is installed, and a filter screen is detachably connected to the bottom of the oil pipe. A cleaning mechanism for realizing the self-cleaning function of the filter screen is configured at the bottom of the cylinder. The cleaning mechanism includes an active rod, a fixed column is fixedly connected to the lower end of the active rod, a sliding column is fixedly connected to the surface of the fixed column, one end of the sliding column slides in contact with a rotating cylinder, and an arc groove is opened inside the rotating cylinder. A scraper is slidably arranged on the inner wall of the filter screen, and the surface of the scraper is arc-shaped and has adsorption mesh holes. The rotation of the rotating cylinder can drive the scraper to rotate in both directions. The interior of the cylinder is equipped with an enhancement mechanism for assisting the cleaning mechanism in filtering oil. The enhancement mechanism includes an arc plate fixedly connected to the bottom of the cylinder. An oil inlet valve is provided in the middle of the arc plate. Multiple sets of sealing rods are slidably connected inside the arc plate. One end of the sealing rod is slidably engaged with a sealing plate. A return spring is provided at the sliding position of the sealing rod and the arc plate. A discharge groove is provided between the arc plate and the cylinder. The cylinder body is also fixedly connected to a fixed cylinder. A connecting plate is slidably arranged inside the fixed cylinder. Multiple sets of conveying pipes are movably engaged inside the connecting plate. The upper end of the conveying pipe is fixedly connected to the fixed cylinder, while the lower end is slidably connected to the fixed cylinder. A push rod is fixedly connected above the connecting plate, and a support plate is fixedly connected above the push rod.

2. The anti-clogging oil pump for downhole oil extraction according to claim 1, characterized in that: The cleaning mechanism also includes a telescopic column fixedly connected to the surface of the rotating cylinder. A connecting rod is slidably connected inside the telescopic column. One end of the connecting rod is fixedly connected to the scraper. A top spring is provided inside the telescopic column. The active rod is slidably connected to the rotating cylinder, and a sealing ring is provided at the sliding position. The bottom of the rotating cylinder is rotatably connected to the filter screen, and a sedimentation tank is provided at the bottom of the filter screen.

3. The anti-clogging oil pump for downhole oil extraction according to claim 1, characterized in that: The support plate has an arc groove at its bottom, and an adsorption strip is rotatably connected inside the arc groove. The support plate has an inclined groove at a position away from the center, and the inclined groove is inclined at the same angle as the inclination angle of the conveying pipe when it is straight. The push rod and the fixed cylinder are slidably connected, and a sealing gasket is provided at the sliding position.

4. The anti-clogging oil pump for downhole oil extraction according to claim 1, characterized in that: An oil extraction mechanism is slidably arranged inside the cylinder. The oil extraction mechanism includes a plunger cylinder. A pull rod is arranged above the plunger cylinder. An upper oil outlet valve and a lower oil outlet valve are respectively arranged inside the plunger cylinder. A partition is arranged between the upper oil outlet valve and the lower oil outlet valve. Several sets of through holes are opened on the surface of the partition. A scraper is detachably connected to the lower part of the plunger cylinder.

5. The anti-clogging oil pump for downhole oil extraction according to claim 2, characterized in that: The upper end of the active rod is fixedly connected to the pull rod. A sealing ring is provided between the upper part of the cylinder and the oil pipe. The diameter of the filter mesh on the outer side of the filter screen is larger than the diameter of the mesh on the inner wall. A sealing gasket is provided at the sliding position of the connecting rod and the telescopic column.

6. The anti-clogging oil pump for downhole oil extraction according to claim 1, characterized in that: A sealing ring is provided at the connection position between the upper end of the conveying pipe and the fixed cylinder, and a sealing ring is also provided at the sliding position between the lower end of the conveying pipe and the fixed cylinder. The sliding position between the lower end of the conveying pipe and the fixed cylinder always remains unchanged.

7. The anti-clogging oil pump for downhole oil extraction according to claim 4, characterized in that: The plunger cylinder is fixedly connected to the drive rod, the upper oil outlet valve and the lower oil outlet valve are slidably sleeved on the surface of the drive rod, and the scraper is made of high-strength wear-resistant material.

8. The anti-clogging oil pump for downhole oil extraction according to claim 3, characterized in that: Multiple sets of absorbent cotton are installed on the surface of the absorbent strip, the inclined groove is located on one side of the arc groove of the support plate, and the upper surface of the support plate is arc-shaped.

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