Unbiased abrasive fluid hydraulic lifting oil extraction device

Abstract

The present application belongs to the technical field of oil production, and particularly relates to a non-bias grinding hydraulic lifting oil production device. The device comprises an oil collecting pipe, a connecting sleeve and a hydraulic assembly. The oil collecting pipe is connected with an oil pumping inlet pipe through the connecting sleeve, and is connected with an oil liquid outlet pipe through an oil pipe short section. The hydraulic assembly is installed on the connecting sleeve. The hydraulic assembly comprises a plug rod, one end of the plug rod is connected with a piston head, and the other end of the plug rod is installed with an oil pumping pump. The reversing pressure relief assembly further comprises a valve core seat and a valve core sleeve which are attached to the outer wall of the plug rod. The valve core seat and the valve core sleeve are in sliding fit. The valve core seat and the valve core sleeve are both provided with a communication cavity. The plug rod is installed with a reversing plate. The plug rod is automatically reversed through the reversing plate. Meanwhile, the high pressure impact of the hydraulic oil on the input hydraulic oil pipeline of the first path and the second path in the reversing process is avoided, so that the pipeline damage is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of oil production, and in particular relates to a hydraulic lifting oil production device without uneven wear. Background Art

[0002] In the oil production operations in the domestic and foreign oil industries, hydraulic pumping units are often used to produce oil, and hydraulic cylinders are used to lift instead of beam pumping units. The hydraulic cylinder usually drives the plunger through the sucker rod, making reciprocating movements in the pump barrel, thereby driving oil and water into the plunger and oil pipe to achieve oil and water production.

[0003] The bulky size of current reversing valves on the market means they can only be installed on the ground for reversing operations. This results in the valve being exposed to constant pressure fluctuations, which reduces the service life of the hydraulic pipeline. Therefore, there are existing self-reversing hydraulic pumping devices, such as CN119288397A, which primarily use a locating ring on the piston rod to push the valve core to achieve reversing.

[0004] However, this solution has the following problems when used:

[0005] First, at the moment a hydraulic cylinder switches direction, the direction of the hydraulic oil needs to change rapidly, which can cause a significant instantaneous change in the pressure in the hydraulic system. For example, when the reversing valve suddenly switches the oil circuit, the high-pressure oil originally flowing to one side of the cylinder suddenly stops flowing, while the other side begins to supply oil. Due to the inertia and compressibility of hydraulic oil, the high-pressure oil originally flowing to the cylinder creates a pressure shock in the hydraulic system, causing damage to the pipeline.

[0006] Second, when the hydraulic cylinder suddenly stops during the lifting and oil extraction process, the high-pressure oil on one side of the cylinder suddenly stops flowing, resulting in a hydraulic shock. Hydraulic shock causes a momentary high pressure in the hydraulic system, which may damage hydraulic components and pipelines. Summary of the Invention

[0007] The purpose of the present invention is to provide a hydraulic lifting oil production device without uneven wear in order to solve the technical problems in the prior art.

[0008] The object of the present invention can be achieved by the following technical solutions: An unbiased grinding hydraulic lifting oil production device, which includes a collecting oil pipe, a connecting sleeve and a hydraulic component. The collecting oil pipe is connected to the pumping liquid inlet pipe through the connecting sleeve. The collecting oil pipe is connected to the oil liquid output pipe through a short oil pipe. The hydraulic component is installed on the connecting sleeve. The hydraulic component includes a plug rod, one end of the plug rod is connected to a piston head, and a oil pump is installed at the other end of the plug rod. A commutation and pressure relief component is installed on the hydraulic component. The hydraulic component includes a top oil inlet, a bottom oil inlet, a top oil outlet and a bottom oil outlet. The commutation and pressure relief component includes oil port one, oil port two, oil port three, oil port four, oil port five, oil port six, oil port seven, oil port eight. The hydraulic oil input pipe is respectively connected to oil port one and oil port three. The hydraulic oil is input into the top oil inlet through oil port one and oil port two, and input into the bottom oil inlet through oil port three and oil port four. The hydraulic oil output pipe is respectively connected to oil port six and oil port eight. The hydraulic oil at the top of the piston head is discharged through the top oil outlet, oil port seven and oil port eight. The hydraulic liquid at the bottom of the piston head is discharged through the bottom oil outlet, oil port five and oil port six. The commutation and pressure relief component further includes a valve core seat and a valve core sleeve that fit on the outer wall of the plug rod. The valve core seat and the valve core sleeve are in sliding fit, and communication cavities are provided on both the valve core seat and the valve core sleeve. A commutation plate is installed on the plug rod. During the lifting and lowering of the plug rod, the commutation plate respectively pushes the valve core sleeve and the valve core seat to move.

[0009] As a further optimization or improvement of this solution, a telescopic ball head is installed on the inner wall of the commutation and pressure relief component. Ball grooves are provided on both the valve core seat and the valve core sleeve. The telescopic ball head is matched with the ball groove.

[0010] As a further optimization or improvement of this solution, the commutation plate includes a far pressure plate and a near pressure plate. During the lifting and lowering of the plug rod, the far pressure plate first pushes the valve core sleeve, and then the near pressure plate pushes the valve core seat.

[0011] As a further optimization or improvement of this solution, a vertical groove is provided on the valve core seat. A slider is installed on the valve core sleeve. The slider is in sliding fit with the vertical groove. A return spring is installed between the slider and the inner wall of the vertical groove.

[0012] As a further optimization or improvement of this solution, an electromagnetic chuck is installed on the vertical groove. A magnetic metal sheet is installed inside the slider. The electromagnetic chuck attracts the magnetic metal sheet.

[0013] As a further optimization or improvement of this solution, a roller is installed inside the slider. The roller fits on the outer wall of the plug rod. The roller is connected to the inner wall of the slider through a compression spring.

[0014] As a further optimization or improvement of this solution, an inclined groove is provided in the vertical groove. The slider is in sliding fit with the inclined groove.

[0015] The beneficial effects of the present invention:

[0016] (1) When the piston head moves to the top, the remote pressure plate first pushes the valve core sleeve upward. As the valve core sleeve moves upward, oil port 5 and oil port 6 are gradually connected. At this time, the hydraulic oil inside the hydraulic component can be discharged through the bottom oil drain port, oil port 5 and oil port 6. Before reversing, the hydraulic pressure of the first input hydraulic oil pipeline is effectively reduced, avoiding the high-pressure impact of the hydraulic oil on the first input hydraulic oil pipeline during the reversing process, thereby causing damage to the first input hydraulic oil pipeline;

[0017] As the piston head moves upward, the near pressure plate subsequently pushes the valve core seat upward, connecting oil port 1 and oil port 2 through the connecting chamber. Hydraulic oil enters the top oil inlet through the second input hydraulic oil pipeline. At this time, the hydraulic oil pushes the piston head and plug rod downward, thereby achieving the plug rod's reversal operation. The present invention achieves automatic reversal of the plug rod through the reversing plate, while preventing the hydraulic oil from high-pressure impact on the first and second input hydraulic oil pipelines during the reversing process, which may cause pipeline damage.

[0018] (2) In the process of lifting and oil production, if the hydraulic assembly stops suddenly, the top electromagnetic suction cup built into the vertical slot starts up, and the electromagnetic suction cup attracts the magnetic metal sheet built into the slider, so that the valve core sleeve moves upward, and the oil port 5 and the oil port 6 are gradually connected. At this time, the hydraulic oil inside the hydraulic assembly can be partially discharged outward through the bottom oil drain port, oil port 5 and oil port 6, thereby relieving the pressure of the first hydraulic oil input pipeline and avoiding the backlog of the first hydraulic oil input pipeline due to the sudden stop of the hydraulic assembly, which may cause damage to the hydraulic components.

[0019] Specifically, as the slider moves closer to the electromagnetic suction cup, the slider gradually moves closer to the oblique direction under the sliding cooperation between the slider and the inclined groove. At this time, the roller is pressed into the slider, causing the slider to press against the outer wall of the plug rod, so that the slider clamps the plug rod to limit the position, thereby preventing the piston head from losing pressure and moving downward during the pressure relief process of the first input hydraulic oil pipe, so that the extracted oil is pushed to the inside of the wellhead under the action of the piston head. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is an internal diagram of the overall structure of the present invention.

[0023] Figure 3 for Figure 2 A magnified view of the structure of part A.

[0024] Figure 4 It is a schematic diagram of the overall structure of the hydraulic component and the reversing pressure relief component.

[0025] Figure 5 Schematic diagram of the internal structure of the hydraulic component.

[0026] Figure 6 This is a schematic diagram of the pipeline connection between the hydraulic component and the reversing pressure relief component.

[0027] Figure 7 This is the coordination diagram of oil port 1, oil port 2, oil port 5 and oil port 6 with the valve core seat and valve core sleeve.

[0028] Figure 8 This is the coordination diagram of oil port three, oil port four, oil port seven and oil port eight with the valve core seat and valve core sleeve.

[0029] Figure 9 This is the matching diagram of the valve core seat, valve core sleeve and plug stem.

[0030] Figure 10 This is an exploded view of the valve core seat, plug stem and valve core sleeve.

[0031] Figure 11 This is an exploded view of the back of the valve core sleeve, plug stem and valve core seat.

[0032] Figure 12 This is the diagram of the slider and vertical groove.

[0033] Figure 13 This is the matching diagram of the slider and the inclined groove.

[0034] The following are marked in the figure: 1. Oil manifold; 2. Oil pipe nipple; 3. Connecting sleeve; 4. Oil pumping inlet pipe; 5. Hydraulic assembly; 501. Top oil inlet; 502. Bottom oil inlet; 503. Top oil drain port; 504. Bottom oil drain port; 505. Plug rod; 506. Piston head; 508. Reversing plate; 5080. Remote pressure plate; 5081. Near pressure plate; 6. Reversing pressure relief assembly; 601. Oil port 1; 602. Oil port 2; 603, oil port three; 604, oil port four; 605, oil port five; 606, oil port six; 607, oil port seven; 608, oil port eight; 609, valve core seat; 610, valve core sleeve; 611, connecting cavity; 612, ball groove; 613, slider; 614, vertical groove; 615, reset spring; 616, electromagnetic suction cup; 617, magnetic metal sheet; 618, roller; 619, compression spring; 620, inclined groove. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] See also Figures 1-9A non-biased wear hydraulic lifting oil production device, which includes an oil collection pipe 1, a connecting sleeve 3 and a hydraulic assembly 5. The oil collection pipe 1 is connected to the oil pumping inlet pipe 4 through the connecting sleeve 3, and the oil collection pipe 1 is connected to the oil output pipe through the oil pipe nipple 2. The hydraulic assembly 5 is installed on the connecting sleeve 3. The hydraulic assembly 5 includes a plug rod 505, one end of the plug rod 505 is connected to the piston head 506, and the other end of the plug rod 505 is installed with an oil pump; the hydraulic assembly 5 is installed with a reversing drain The hydraulic assembly 6 includes a top oil inlet 501, a bottom oil inlet 502, a top oil discharge port 503 and a bottom oil discharge port 504. The reversing pressure relief assembly 6 includes an oil port 1 601, an oil port 2 602, an oil port 3 603, an oil port 4 604, an oil port 5 605, an oil port 6 606, an oil port 7 607, an oil port 7 607 and an oil port 8 608. The hydraulic oil input pipes are connected to the oil port 1 601 and the oil port 3 603 respectively. The hydraulic oil is input into the top oil inlet 501 through the oil port 1 601 and the oil port 2 602, and is input into the bottom oil inlet 502 through the oil port 3 603 and the oil port 4 604; the hydraulic oil output pipes are connected to the oil port 6 606 and the oil port 8 608 respectively, and the hydraulic oil at the top of the piston head 506 is discharged through the top oil discharge port 503, the oil port 7 607 and the oil port 8 608, and the hydraulic fluid at the bottom of the piston head 506 is discharged through the bottom oil discharge port 504, the oil port 5 605 and The oil port 606 is discharged; the reversing pressure relief assembly 6 also includes a valve core seat 609 and a valve core sleeve 610 that are attached to the outer wall of the plug rod 505. The valve core seat 609 and the valve core sleeve 610 are slidably matched. A connecting cavity 611 is provided on the valve core seat 609 and the valve core sleeve 610. A reversing plate 508 is installed on the plug rod 505. During the lifting and lowering of the plug rod 505, the reversing plate 508 pushes the valve core sleeve 610 and the valve core seat 609 to move respectively.

[0037] Specifically, a telescopic ball head is installed on the inner wall of the reversing pressure relief assembly 6 , and a ball groove 612 is provided on the valve core seat 609 and the valve core sleeve 610 , and the telescopic ball head cooperates with the ball groove 612 .

[0038] Specifically, the reversing plate 508 includes a distal pressure plate 5080 and a proximal pressure plate 5081 . During the lifting and lowering of the plug rod 505 , the distal pressure plate 5080 first pushes the valve core sleeve 610 , and then the proximal pressure plate 5081 pushes the valve core seat 609 .

[0039] It should be noted that one end of the oil manifold 1 is connected to the oil pumping inlet pipe 4 via a connecting sleeve 3, and the other end of the oil manifold 1 is connected to the oil output pipe via a tubing nipple 2. When the hydraulic assembly 5 is in operation, the oil inside the wellhead is transported from the oil pumping inlet pipe 4 to the connecting sleeve 3 and the oil manifold 1, and then the oil manifold 1 transports the oil to the oil output pipe on the surface. When the hydraulic assembly 5 is not switching, the valve core sleeve 610 and the valve core seat 609 are flush.

[0040] During use, the hydraulic oil input pipe delivers hydraulic oil to the hydraulic assembly 5 in two ways. First, the hydraulic oil input pipe delivers hydraulic oil to the bottom oil inlet 502 through oil port 3 603 and oil port 4 604. Second, the hydraulic oil input pipe delivers hydraulic oil to the top oil inlet 501 through oil port 1 601 and oil port 2 602.

[0041] The hydraulic oil output pipe drains hydraulic oil from the hydraulic assembly 5 in two ways. First, the hydraulic oil in the hydraulic assembly 5 is discharged through the top oil drain port 503, oil port 7 607, and oil port 8 608. Second, the hydraulic oil in the hydraulic assembly 5 is discharged through the bottom oil drain port 504, oil port 5 605, and oil port 606.

[0042] See also Figure 7 and Figure 8 At this time, oil port 1 601 and oil port 2 602 are blocked by valve core seat 609, and oil port 5 605 and oil port 6 606 are blocked by valve core sleeve 610, that is, the second input hydraulic oil pipeline and the second output hydraulic oil pipeline are blocked; oil port 3 603 is connected to oil port 4 604 through connecting cavity 611, and oil port 7 607 is connected to oil port 8 608 through connecting cavity 611, that is, the first input hydraulic oil pipeline and the first output hydraulic oil pipeline are connected; see Figure 6 , hydraulic oil can only be input into the bottom oil inlet 502 through oil port three 603 and oil port four 604, and at the same time, hydraulic oil can only be discharged through the top oil drain port 503, oil port seven 607 and oil port eight 608. In this state, the plug rod 505 drives the piston head 506 to lift.

[0043] When the piston head 506 moves to the top, the remote pressure plate 5080 on the plug rod 505 first pushes the valve core sleeve 610 to move upward. As the valve core sleeve 610 moves upward, the oil port 5 605 and the oil port 606 are gradually connected, that is, the second output hydraulic oil pipeline is connected. At this time, the hydraulic oil inside the hydraulic component 5 can be discharged outward through the bottom oil discharge port 504, the oil port 5 605 and the oil port 606. Before reversing, the hydraulic pressure of the first input hydraulic oil pipeline is effectively reduced, avoiding the high-pressure impact of the hydraulic oil on the first input hydraulic oil pipeline during the reversing process, thereby causing damage to the first input hydraulic oil pipeline;

[0044] As the piston head 506 moves upward, the near-pressure plate 5081 on the plug rod 505 then pushes the valve core seat 609 upward. As the valve core seat 609 moves upward, oil port 1 601 and oil port 2 602 are connected through the connecting chamber 611, and oil port 3 603 and oil port 4 604 are blocked by the valve core seat 609, that is, the second input hydraulic oil pipeline is connected, and the first input hydraulic oil pipeline is blocked. The hydraulic oil enters the top oil inlet 501 through the second input hydraulic oil pipeline. At this time, the hydraulic oil pushes the piston head 506 and the plug rod 505 to move downward, thereby realizing the reversing operation of the plug rod 505.

[0045] As the plug rod 505 moves downward, the far pressure plate 5080 and the near pressure plate 5081 separate from the valve core sleeve 610 and the valve core seat 609, and the valve core seat 609 and the valve core sleeve 610 are reset under the action of the reset spring 615, and reciprocate in sequence. The present invention realizes automatic reversal of the plug rod 505 through the reversing plate 508, and at the same time avoids high-pressure impact of the hydraulic oil on the first and second input hydraulic oil pipelines during the reversing process, causing damage to the pipelines.

[0046] It should be noted that the valve core seat 609 and valve core sleeve 610 cooperate with the telescopic ball head on the inner wall of the reversing pressure relief assembly 6 through the ball groove 612 to achieve the limit of the valve core seat 609 and valve core sleeve 610 during the downward movement. Because the far pressure plate 5080 and the near pressure plate 5081 are not arranged on the same horizontal plane, after the far pressure plate 5080 and the near pressure plate 5081 respectively push the valve core sleeve 610 and valve core seat 609 to complete the reversing operation, the valve core sleeve 610 can be promptly reset by the reset spring 615, and the ball groove 612 on the valve core sleeve 610 cooperates with the telescopic ball head.

[0047] See also Figure 5-Figure 13 The valve core seat 609 is provided with a vertical groove 614 , the valve core sleeve 610 is provided with a slider 613 , the slider 613 is slidably matched with the vertical groove 614 , and a return spring 615 is installed between the slider 613 and the inner wall of the vertical groove 614 .

[0048] Specifically, an electromagnetic suction cup 616 is installed on the vertical slot 614 , a magnetic metal sheet 617 is installed in the slider 613 , and the electromagnetic suction cup 616 attracts the magnetic metal sheet 617 .

[0049] Specifically, a roller 618 is installed inside the slider 613 , and the roller 618 is in contact with the outer wall of the plug rod 505 . The roller 618 is connected to the inner wall of the slider 613 via a compression spring 619 .

[0050] Specifically, an oblique groove 620 is defined in the vertical groove 614 , and the slider 613 is slidably engaged with the oblique groove 620 .

[0051] It should be noted that, when the hydraulic assembly 5 is in operation, Figure 12 and Figure 13 At this point, the roller 618 inside the slider 613 is in contact with the outer wall of the plug rod 505. The plug rod 505 moves up and down, driving the roller 618 to roll. The rolling direction of the roller 618 is used to determine the state of the plug rod 505. Electromagnetic suction cups 616 are installed at the top and bottom of the vertical slot 614. Magnetic metal sheets 617 are built into the ends of the slider 613. The electromagnetic suction cups 616 attract the magnetic metal sheets 617 built into the slider 613.

[0052] During the process of lifting the plug rod 505 to produce oil, see Figure 6, hydraulic oil can only be input into the bottom oil inlet 502 through oil port 3 603 and oil port 4 604, and hydraulic oil can only be discharged through the top oil drain port 503, oil port 7 607 and oil port 8 608. Figure 12 and Figure 13 If the hydraulic assembly 5 stops suddenly, the top electromagnetic suction cup 616 built into the vertical slot 614 is activated, and the electromagnetic suction cup 616 attracts the magnetic metal sheet 617 built into the slider 613, thereby driving the slider 613 to move closer to the electromagnetic suction cup 616, causing the valve core sleeve 610 to move upward. As the valve core sleeve 610 moves upward, the oil port 5 605 and the oil port 606 are gradually connected, that is, the second output hydraulic oil pipeline is connected. At this time, the hydraulic oil inside the hydraulic assembly 5 can be discharged outward through the bottom oil drain port 504, the oil port 5 605 and the oil port 606, thereby relieving the pressure of the first input hydraulic oil pipeline, thereby avoiding the backlog of the first input hydraulic oil pipeline due to the sudden stop of the hydraulic assembly 5, which may cause damage to the hydraulic components.

[0053] Specifically, as the slider 613 moves closer to the electromagnetic suction cup 616, the slider 613 gradually moves obliquely closer to the plug rod 505 under the sliding cooperation between the slider 613 and the inclined groove 620. At this time, the roller 618 is pressed into the slider 613, so that the slider 613 presses against the outer wall of the plug rod 505, so that the slider 613 clamps and limits the plug rod 505, thereby preventing the piston head 506 from losing pressure and moving downward during the pressure relief process of the first input hydraulic oil pipe, so that the extracted oil is pushed to the inside of the wellhead under the action of the piston head 506.

[0054] When the hydraulic assembly 5 is started, the electromagnetic chuck 616 is closed. When the plug rod 505 moves downward, the hydraulic assembly 5 stops suddenly. Similarly.

[0055] The implementation principle of the present invention is:

[0056] During use, the hydraulic oil input pipe delivers hydraulic oil to the hydraulic assembly 5 in two ways. First, the hydraulic oil input pipe delivers hydraulic oil to the bottom oil inlet 502 through oil port 3 603 and oil port 4 604. Second, the hydraulic oil input pipe delivers hydraulic oil to the top oil inlet 501 through oil port 1 601 and oil port 2 602.

[0057] The hydraulic oil output pipe drains hydraulic oil from the hydraulic assembly 5 in two ways. First, the hydraulic oil in the hydraulic assembly 5 is discharged through the top oil drain port 503, oil port 7 607, and oil port 8 608. Second, the hydraulic oil in the hydraulic assembly 5 is discharged through the bottom oil drain port 504, oil port 5 605, and oil port 606.

[0058] See also Figure 7 and Figure 8At this time, oil port 1 601 and oil port 2 602 are blocked by valve core seat 609, and oil port 5 605 and oil port 6 606 are blocked by valve core sleeve 610, that is, the second input hydraulic oil pipeline and the second output hydraulic oil pipeline are blocked; oil port 3 603 is connected to oil port 4 604 through connecting cavity 611, and oil port 7 607 is connected to oil port 8 608 through connecting cavity 611, that is, the first input hydraulic oil pipeline and the first output hydraulic oil pipeline are connected; see Figure 6 , hydraulic oil can only be input into the bottom oil inlet 502 through oil port three 603 and oil port four 604, and at the same time, hydraulic oil can only be discharged through the top oil drain port 503, oil port seven 607 and oil port eight 608. In this state, the plug rod 505 drives the piston head 506 to lift.

[0059] When the piston head 506 moves to the top, the remote pressure plate 5080 on the plug rod 505 first pushes the valve core sleeve 610 to move upward. As the valve core sleeve 610 moves upward, the oil port 5 605 and the oil port 606 are gradually connected, that is, the second output hydraulic oil pipeline is connected. At this time, the hydraulic oil inside the hydraulic component 5 can be discharged outward through the bottom oil discharge port 504, the oil port 5 605 and the oil port 606. Before reversing, the hydraulic pressure of the first input hydraulic oil pipeline is effectively reduced, avoiding the high-pressure impact of the hydraulic oil on the first input hydraulic oil pipeline during the reversing process, thereby causing damage to the first input hydraulic oil pipeline;

[0060] As the piston head 506 moves upward, the near-pressure plate 5081 on the plug rod 505 then pushes the valve core seat 609 upward. As the valve core seat 609 moves upward, oil port 1 601 and oil port 2 602 are connected through the connecting chamber 611, and oil port 3 603 and oil port 4 604 are blocked by the valve core seat 609, that is, the second input hydraulic oil pipeline is connected, and the first input hydraulic oil pipeline is blocked. The hydraulic oil enters the top oil inlet 501 through the second input hydraulic oil pipeline. At this time, the hydraulic oil pushes the piston head 506 and the plug rod 505 to move downward, thereby realizing the reversing operation of the plug rod 505.

[0061] As the plug rod 505 moves downward, the far pressure plate 5080 and the near pressure plate 5081 separate from the valve core sleeve 610 and the valve core seat 609, and the valve core seat 609 and the valve core sleeve 610 are reset under the action of the reset spring 615, and reciprocate in sequence. The present invention realizes automatic reversal of the plug rod 505 through the reversing plate 508, and at the same time avoids high-pressure impact of the hydraulic oil on the first and second input hydraulic oil pipelines during the reversing process, causing damage to the pipelines.

[0062] During the process of lifting the plug rod 505 to produce oil, see Figure 6 , hydraulic oil can only be input into the bottom oil inlet 502 through oil port 3 603 and oil port 4 604, and hydraulic oil can only be discharged through the top oil drain port 503, oil port 7 607 and oil port 8 608. Figure 12 and Figure 13If the hydraulic assembly 5 stops suddenly, the top electromagnetic suction cup 616 built into the vertical slot 614 is activated, and the electromagnetic suction cup 616 attracts the magnetic metal sheet 617 built into the slider 613, thereby driving the slider 613 to move closer to the electromagnetic suction cup 616, causing the valve core sleeve 610 to move upward. As the valve core sleeve 610 moves upward, the oil port 5 605 and the oil port 606 are gradually connected, that is, the second output hydraulic oil pipeline is connected. At this time, the hydraulic oil inside the hydraulic assembly 5 can be discharged outward through the bottom oil drain port 504, the oil port 5 605 and the oil port 606, thereby relieving the pressure of the first input hydraulic oil pipeline, thereby avoiding the backlog of the first input hydraulic oil pipeline due to the sudden stop of the hydraulic assembly 5, which may cause damage to the hydraulic components.

[0063] Specifically, as the slider 613 moves closer to the electromagnetic suction cup 616, the slider 613 gradually moves obliquely closer to the plug rod 505 under the sliding cooperation between the slider 613 and the inclined groove 620. At this time, the roller 618 is pressed into the slider 613, so that the slider 613 presses against the outer wall of the plug rod 505, so that the slider 613 clamps and limits the plug rod 505, thereby preventing the piston head 506 from losing pressure and moving downward during the pressure relief process of the first input hydraulic oil pipe, so that the extracted oil is pushed to the inside of the wellhead under the action of the piston head 506.

[0064] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A hydraulic lifting oil production device without uneven wear, characterized by: The invention comprises an oil collecting pipe (1), a connecting sleeve (3) and a hydraulic assembly (5), wherein the oil collecting pipe (1) is connected to an oil pumping inlet pipe (4) via the connecting sleeve (3), the oil collecting pipe (1) is connected to an oil output pipe via an oil pipe nipple (2), the hydraulic assembly (5) is installed on the connecting sleeve (3), and the hydraulic assembly (5) comprises a plug rod (505), one end of the plug rod (505) is connected to a piston head (506), and the other end of the plug rod (505) is installed with an oil pump; A reversing pressure relief assembly (6) is installed on the hydraulic assembly (5), and the hydraulic assembly (5) further includes a top oil inlet (501), a bottom oil inlet (502), a top oil discharge port (503), and a bottom oil discharge port (504). The reversing pressure relief assembly (6) includes oil port 1 (601), oil port 2 (602), oil port 3 (603), oil port 4 (604), oil port 5 (605), oil port 6 (606), oil port 7 (607), and oil port 8 (608); The hydraulic oil input pipe is connected to the oil port 1 (601) and the oil port 3 (603) respectively, and the hydraulic oil is input into the top oil inlet (501) through the oil port 1 (601) and the oil port 2 (602), and is input into the bottom oil inlet (502) through the oil port 3 (603) and the oil port 4 (604); the hydraulic oil output pipe is connected to the oil port 6 (606) and the oil port 8 (608) respectively, and the hydraulic oil at the top of the piston head (506) is discharged through the top oil discharge port (503), the oil port 7 (607) and the oil port 8 (608), and the hydraulic oil at the bottom of the piston head (506) is discharged through the bottom oil discharge port (504), the oil port 5 (605) and the oil port 6 (606); The reversing pressure relief assembly (6) further comprises a valve core seat (609) and a valve core sleeve (610) attached to the outer wall of the plug rod (505), the valve core seat (609) and the valve core sleeve (610) being slidably matched, and a connecting cavity (611) is provided on the valve core seat (609) and the valve core sleeve (610), and a reversing plate (508) is installed on the plug rod (505), and when the plug rod (505) is lifted and lowered, the reversing plate (508) respectively pushes the valve core sleeve (610) and the valve core seat (609) to move; The reversing plate (508) includes a distal pressure plate (5080) and a proximal pressure plate (5081). When the plug rod (505) is lifted and lowered, the distal pressure plate (5080) first pushes the valve core sleeve (610), and then the proximal pressure plate (5081) pushes the valve core seat (609). A vertical groove (614) is provided on the valve core seat (609), a slider (613) is installed on the valve core sleeve (610), the slider (613) and the vertical groove (614) are slidably matched, and a return spring (615) is installed between the slider (613) and the inner wall of the vertical groove (614); An electromagnetic suction cup (616) is installed on the vertical groove (614), a magnetic metal sheet (617) is installed in the slider (613), and the electromagnetic suction cup (616) attracts the magnetic metal sheet (617).

2. The wear-free hydraulic lifting oil production device according to claim 1, characterized in that: A telescopic ball head is installed on the inner wall of the reversing pressure relief assembly (6), and a ball groove (612) is provided on the valve core seat (609) and the valve core sleeve (610), and the telescopic ball head cooperates with the ball groove (612).

3. The wear-free hydraulic lifting oil production device according to claim 1, characterized in that: A roller (618) is installed inside the slider (613), and the roller (618) is in contact with the outer wall of the plug rod (505). The roller (618) is connected to the inner wall of the slider (613) via a compression spring (619).

4. The wear-free hydraulic lifting oil production device according to claim 3, characterized in that: An oblique groove (620) is provided in the vertical groove (614), and the sliding block (613) is slidably engaged with the oblique groove (620).

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