Soft sealing reinforced plunger oil well pump

Abstract

The invention relates to the technical field of oil field equipment, in particular to a soft sealing reinforced plunger oil well pump. Comprising an oil pumping barrel, the oil pumping barrel is in threaded connection with a fixed valve seat, a plunger assembly is slidably connected in the oil pumping barrel, a first sealing ring is arranged between the oil pumping barrel and the plunger assembly, a traveling valve is arranged in the plunger assembly, a fixed valve is arranged on the fixed valve seat, the plunger assembly is in threaded connection with an oil pumping rod, and the oil pumping rod is in threaded connection with the oil pumping barrel. A first fixing frame is fixedly connected into the plunger assembly, the first fixing frame is used for limiting the moving range of the traveling valve, limiting grooves distributed in a mirror image mode are formed in the first fixing frame, and power rods are slidably connected into the limiting grooves distributed in the mirror image mode respectively. The power rod actively drives the traveling valve to rotate in the oil pumping process, the contact position of the traveling valve and the plunger assembly every time is changed, the probability of eccentric wear of the traveling valve is reduced, and therefore the integrity of the sealing effect of the traveling valve is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil field equipment, and particularly relates to a soft sealing reinforced plunger oil pump. BACKGROUND

[0002] The plunger oil pump is a core mechanical device widely used in oil field exploitation, which lifts the underground oil liquid to the ground through the reciprocating movement of the plunger in the pump cylinder to perform the oil pumping work.

[0003] In the oil well with high sand content, with the continuous operation of the oil pump, the sand particles entrained in the oil liquid will continuously erode the traveling valve in the pump. Due to the unevenness of the local flow field and the distribution of sand particles itself in the opening and closing process of the valve, the uneven wear of the local position is easily induced, and then the discrete distributed pits are formed. In the extreme working condition, even a large isolated pit formed by the serious damage of a single part may occur. Such uneven wear can significantly damage the integrity of the traveling valve sealing surface, leading to the decline of the sealing performance and the pump efficiency, and further promoting the preferential erosion of sand particles to the damaged area, finally forming a vicious cycle of "wear-leakage-accelerated wear", which seriously restricts the working life of the oil pump and the overall oil production efficiency. SUMMARY

[0004] In order to overcome the above-mentioned defects, the present application provides a soft sealing reinforced plunger oil pump.

[0005] Technical scheme: A soft sealing reinforced plunger oil pump comprises an oil pumping cylinder, a fixed valve seat is threadedly connected to the oil pumping cylinder, a plunger assembly is slidably connected in the oil pumping cylinder, a traveling valve is arranged in the plunger assembly, a fixed valve is arranged on the fixed valve seat, an oil pumping rod is threadedly connected to the plunger assembly, a first fixing frame is fixedly connected in the plunger assembly, the first fixing frame is used for limiting the movement range of the traveling valve, mirror image distributed limiting grooves are arranged on the first fixing frame, power rods are respectively slidably connected in the mirror image distributed limiting grooves, the power rods in the mirror image distributed limiting grooves are centrally symmetrically distributed, a deformation part is arranged on the power rod, the deformation part of the power rod is used for driving the traveling valve to rotate, and a booster assembly for improving the sealing effect between the plunger assembly and the oil pumping cylinder is arranged on the plunger assembly.

[0006] As a preferred, a power plate is arranged on the plunger assembly, a first fan blade is fixedly connected to the power plate in a circumferential array, mirror image distributed guide grooves are arranged on the power plate, and the power rod is slidably arranged in the adjacent guide grooves.

[0007] As a preferred, a fixed plate is fixedly connected in the plunger assembly, a rotating pin is rotatably connected to the fixed plate, a torsional spring is arranged between the fixed plate and the rotating pin, and the rotating pin is fixedly connected to the power plate.

[0008] As a preferred, the booster assembly comprises a first sealing ring, the first sealing ring is fixed on the plunger assembly, the first sealing ring is used for sealing the plunger assembly and the pumping cylinder, a liquid storage cavity is arranged in the first sealing ring, the liquid storage cavity is filled with oil liquid for transmitting pressure, a mirror image and circumferentially arrayed pressure transmission hole is arranged on the plunger assembly, a diaphragm is arranged on the side of the pressure transmission hole away from the first sealing ring, and the pressure transmission hole is communicated with the liquid storage cavity.

[0009] As a preferred, mirror image distributed second sealing rings are arranged between the pumping cylinder and the plunger assembly.

[0010] As a preferred, a convex part is arranged on the second sealing ring, and the convex part is used for guiding and cleaning oil sand attached between the pumping cylinder and the plunger assembly.

[0011] As a preferred, a second fixing frame is further arranged, the second fixing frame is fixed in the plunger assembly, and a spoiler plate is rotationally connected to the second fixing frame.

[0012] As a preferred, a spoiler hole is arranged on the spoiler plate, and a flow area of the spoiler hole is smaller than a flow area between the spoiler plate and the plunger assembly.

[0013] As a preferred, second blades are uniformly arranged on the spoiler plate, a one-way shell is arranged on the second fixing frame, and a position adjusting torsional spring is fixed between the one-way shell and the spoiler plate.

[0014] As a preferred, a boosting frame is further arranged, the boosting frame is slidingly connected to the first fixing frame, a boosting spring is fixed between the boosting frame and the plunger assembly, and the boosting frame is used for pushing the floating valve.

[0015] The beneficial effects of the present application are: the present application drives the traveling valve to rotate in the oil pumping process through the power rod, changes the contact position of the traveling valve with the plunger assembly each time, reduces the probability of eccentric wear of the traveling valve, thereby ensuring the integrity of the sealing effect of the traveling valve; after the power rod drives the traveling valve to rotate, the traveling valve is separated from the contact, so that the rotating state of the traveling valve is affected by inertia and external force, to increase the disorder of the rotating angle of the traveling valve and improve the uniformity of the wear of the traveling valve; the pressure in the plunger assembly is transmitted to the liquid storage cavity through the diaphragm on the pressure hole (i.e. the diaphragm on the pressure hole is moved inward when the pressure fluctuates), thereby forming a "hydraulic compensation cavity", which can maintain stable sealing pressure during the entire pump inspection period, thereby ensuring the stability of the pump efficiency; the deflection angle of the one-way adjusting spoiler in the plunger assembly is adjusted through the one-way shell, so that the flow distribution in the plunger assembly can be adjusted after each stroke, thereby constantly changing the rotating direction of the traveling valve and improving the uniformity of the wear distribution on the traveling valve. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application; Figure 2 It is a schematic diagram of the three-dimensional structure of the internal structure of the oil pumping cylinder and the fixed valve seat of the present application; Figure 3 It is a schematic diagram of the three-dimensional structure of the first sealing ring of the present application; Figure 4 It is a schematic diagram of the three-dimensional structure of the internal structure of the plunger assembly of the present application; Figure 5 It is an exploded view of the three-dimensional structure of the limiting groove and the power rod of the present application; Figure 6 It is a sectional view of the three-dimensional structure of the plunger assembly and the first sealing ring of the present application; Figure 7 It is a schematic diagram of the three-dimensional structure of the one-way shell and the position adjusting torsional spring of the present application; Figure 8 It is a schematic diagram of the three-dimensional structure of the second fixed frame and the second fan blade of the present application; Figure 9 It is a sectional view of the three-dimensional structure of the second sealing ring and the protruding part of the present application.

[0017] The marks in the drawings: 1: oil pumping cylinder, 2: fixed valve seat, 3: plunger assembly, 31: first sealing ring, 4: traveling valve, 41: fixed valve, 5: oil pumping rod, 6: first fixed frame, 7: limiting groove, 8: power rod, 9: power plate, 10: first fan blade, 11: guide groove, 12: fixed plate, 13: rotating pin, 14: liquid storage cavity, 15: pressure hole, 16: second sealing ring, 17: protruding part, 18: second fixed frame, 19: spoiler, 20: spoiler hole, 21: second fan blade, 22: one-way shell, 23: position adjusting torsional spring, 24: boost frame, 25: boost spring. Detailed Implementation

[0018] The embodiments of the present invention will be described below with reference to the accompanying drawings. Example 1

[0019] This embodiment discloses a soft-seal reinforced plunger oil pump, which is used to actively control the movement state of the valve during the use of the oil pump, thereby reducing the possibility of uneven wear of the valve.

[0020] like Figures 1-5 As shown, the oil pump includes an oil pump barrel 1, a fixed valve seat 2 threadedly connected to the lower side of the oil pump barrel 1, a plunger assembly 3 slidably connected inside the oil pump barrel 1, a floating valve 4 disposed inside the plunger assembly 3, a fixed valve 41 disposed inside the fixed valve seat 2, a sucker rod 5 threadedly connected to the upper side of the plunger assembly 3, the upper side of the sucker rod 5 being connected to an external power source, a first fixed frame 6 fixedly connected inside the plunger assembly 3, the first fixed frame 6 consisting of a circular plate and three circular rods arranged in a circumferential array, the three circular rods on the first fixed frame 6 being used to limit the movement range of the floating valve 4, two limiting grooves 7 arranged in a front-to-back mirror distribution on the first fixed frame 6, power rods 8 slidably connected to the two limiting grooves 7 respectively, the two power rods 8 being centrally symmetrically distributed, the power rods 8 being provided with a deformation part, the deformation part of the power rod 8 being used to drive the floating valve 4 to rotate ( The deformable parts of the two power rods 8 are closely attached to and "rub" against the moving valve 4. There is a gap between the three round rods on the first fixed frame 6 and the moving valve 4 to allow the power rods 8 to move. A power plate 9 is provided inside the plunger assembly 3. The outer periphery of the power plate 9 is fixedly connected to the first fan blades 10 arranged in a circumferential array. Two guide grooves 11 are provided on the power plate 9 in a mirror arrangement. The power rod 8 slides in the adjacent guide grooves 11. The guide grooves 11 and the limiting grooves 7 together restrict the movement trajectory of the power rod 8. The two limiting grooves 7 are parallel to each other. The line connecting the two guide grooves 11 passes through the center of the power plate 9. A fixed plate 12 is fixedly connected inside the plunger assembly 3. A rotating pin 13 fixed to the power plate 9 is rotatably connected to the fixed plate 12, and a torsion spring is provided between the two. A pressurization component is provided on the plunger assembly 3 to improve the sealing effect between the plunger assembly 3 and the oil pump 1.

[0021] The operation process of the oil pump in this embodiment is as follows: First, install the device onto the oil pipe and connect the sucker rod 5 to the external power source. At this point, the preparation is complete.

[0022] When pumping is needed, the user controls the external power to drive the plunger assembly 3 up and down reciprocatingly through the sucker rod 5, so as to gradually pump out the oil in the oil well: when the plunger assembly 3 moves downward (downstroke), the plunger assembly 3 drives the parts in it to move downward synchronously, in the process, the hydraulic oil between the plunger assembly 3 and the fixed valve 41 extrudes the floating valve 4 upward, so that the floating valve 4 loses the blockage of the lower side of the plunger assembly 3, and the oil flows into the plunger assembly 3 through the lower side of the plunger assembly 3, at this time, with the plunger assembly 3 as the reference system, the oil flows upward relative to the plunger assembly 3, and in the process, the oil synchronously drives the power plate 9 to rotate counterclockwise through the first fan blade 10, and the power plate 9 drives the two power rods 8 to rotate through the guide slot 11 in the process of rotating, and in the process of rotating of the power rod 8, under the action of the limiting slot 7, the front power rod 8 moves horizontally to the right, and the rear power rod 8 moves horizontally to the left, in the process of moving of the two power rods 8, the two power rods 8 synchronously contact and extrude the floating valve 4, and with the movement of the two power rods 8, the power rod 8 gradually extrudes the floating valve 4 to make it rotate (at the same time, with the rotation of the floating valve 4, the deformable part of the power rod 8 deforms and tightly adheres to the floating valve 4), so that the floating valve 4 rotates horizontally around its vertical axis, until the power rod 8 moves to the other end of the limiting slot 7, and the power plate 9 stops rotating under the limitation, in the above-mentioned rotating process of the power plate 9, the power plate 9 drives the rotating pin 13 to rotate synchronously, so that the fixed plate 12 and the rotating pin 13 gradually store the torsional spring force, through the above-mentioned action, the floating valve 4 actively rotates when it is impacted by the oil, reducing the probability of eccentric wear of the floating valve 4, so as to ensure the integrity of the sealing effect of the floating valve 4.

[0023] When the downstroke is about to end, the flow in the plunger assembly 3 gradually decreases, and when the current flow of the oil is not enough to maintain the torsional spring force between the fixed plate 12 and the rotating pin 13, the torsional spring between the fixed plate 12 and the rotating pin 13 drives the power rod 8 to reset through the power plate 9, so as to drive the floating valve 4 to rotate again, since the power rod 8 drives the floating valve 4 to rotate and then comes out of contact, so that the rotating state of the floating valve 4 is affected by its inertia and external force, so as to increase the disorder of the rotating angle of the floating valve 4 and improve the uniformity of its wear. Example 2

[0024] The present embodiment discloses a soft sealing reinforced plunger oil pumping pump, which is further improved on the basis of example 1.

[0025] The structure, connection relationship and working process of the oil pumping pump in example 1 are not described again, and the working principle of the following structure is mainly described, and the subsequent examples are the same.

[0026] As Figure 2 , Figure 3 , Figure 6 and Figure 9As shown, the booster assembly includes a first sealing ring 31 fixed to the plunger assembly 3, the first sealing ring 31 is used to seal the plunger assembly 3 and the oil pumping cylinder 1, the inner periphery of the first sealing ring 31 is provided with a liquid storage cavity 14, and the thickness of the liquid storage cavity 14 is less than half of the total thickness of the first sealing ring 31, the liquid storage cavity 14 is filled with oil liquid for transmitting pressure, the plunger assembly 3 is provided with upper and lower mirror image and circumferentially arrayed pressure transmission holes 15, the pressure transmission holes 15 are provided with diaphragms away from the first sealing ring 31, the diaphragms are stretchable and made of pressure-resistant and wear-resistant materials, and are used to transmit the internal pressure of the plunger assembly 3, the pressure transmission holes 15 are in communication with the liquid storage cavity 14, the oil pumping cylinder 1 and the plunger assembly 3 are provided with two second sealing rings 16 which are mirror image distributed, the first sealing ring 31 is located between the two second sealing rings 16, the second sealing ring 16 is provided with a protruding portion 17, and the protruding portion 17 is used to guide and clean the oil sand adhered between the oil pumping cylinder 1 and the plunger assembly 3.

[0027] The working process of the oil pumping pump in the embodiment is as follows: In the above embodiment, during the reciprocating movement of the plunger assembly 3 (i.e. the upstroke and the downstroke), the two second sealing rings 16 and the first sealing ring 31 move up and down together, and in this process, the two second sealing rings 16 on the upper and lower sides first complete the first layer of sealing, and the protruding portion 17 can scrape off the sand adhered to the inner wall of the oil pumping cylinder 1 during the movement, thereby reducing the probability of sand entering the space between the oil pumping cylinder 1 and the plunger assembly 3 and improving the sealing effect.

[0028] In the above embodiment, during the reciprocating movement of the plunger assembly 3, the pressure in the plunger assembly 3 is transmitted to the liquid storage cavity 14 through the diaphragm on the pressure transmission hole 15 (i.e. the diaphragm on the pressure transmission hole 15 is extruded inward when the pressure fluctuates), thereby forming a "hydraulic compensation cavity", which can maintain stable sealing pressure during the entire pump inspection period and ensure the stability of the pump efficiency. Embodiment 3

[0029] The embodiment discloses a soft sealing reinforced plunger oil pumping pump, which is further improved on the basis of the embodiment 2.

[0030] As Figure 4 and Figures 6-8The second fixed frame 18 is fixedly connected to the plunger assembly 3, and the cylindrical portion of the second fixed frame 18 is rotationally connected with a spoiler plate 19. The spoiler plate 19 is provided with spoiler holes 20 which are fan-shaped through holes. The flow area of the spoiler holes 20 is smaller than the flow area between the spoiler plate 19 and the plunger assembly 3. The spoiler plate 19 is fixedly connected with second vanes 21 which are uniformly distributed. The second fixed frame 18 is provided with a one-way shell 22 which is rotationally connected with the cylindrical portion of the second fixed frame 18 through a ratchet and pawl mechanism. The one-way shell 22 is fixedly connected with a position-adjusting torsion spring 23 which is between the one-way shell 22 and the spoiler plate 19. The second fixed frame 18 is also provided with a boost frame 24 which is slidingly connected to the outer side of the cylindrical portion of the first fixed frame 6. The boost frame 24 is fixedly connected with a boost spring 25 which is between the boost frame 24 and the plunger assembly 3. The boost spring 25 is in a compressed state initially, and the boost frame 24 is used to push the traveling valve 4.

[0031] The working process of the oil pump in the embodiment is as follows: In the above embodiment, during the downstroke process, the oil in the plunger assembly 3 starts to flow. Because the area between the spoiler plate 19 and the plunger assembly 3 is larger than the area of the spoiler holes 20, the flow of the oil through the spoiler holes 20 is smaller than the flow of the oil between the spoiler plate 19 and the plunger assembly 3. Therefore, when the oil with different flows passes through the traveling valve 4, different torques are generated, thereby driving the traveling valve 4 to rotate longitudinally around the horizontal shaft of the traveling valve 4, and thereby improving the uniformity of the wear distribution on the traveling valve 4 from another dimension.

[0032] When the oil passes through the spoiler plate 19, the oil drives the spoiler plate 19 to rotate through the second vanes 21, and the position-adjusting torsion spring 23 is twisted to store energy until the position-adjusting torsion spring 23 is fully charged. At this time, the second fixed frame 18 and the one-way shell 22 are in a mutual clamping state in the rotation direction, that is, the spoiler plate 19 will not rotate again. When the downstroke ends (that is, after the oil in the plunger assembly 3 stops flowing), the position-adjusting torsion spring 23 drives the spoiler plate 19 to rotate in the opposite direction. After the position-adjusting torsion spring 23 is reset, the spoiler plate 19 drives the one-way shell 22 to rotate through the position-adjusting torsion spring 23 due to inertia. The one-way shell 22 and the second fixed frame 18 produce mutual rotation, thereby changing the distribution angle of the spoiler plate 19 in the plunger assembly 3 until the one-way shell 22 stops rotating. At this time, the adjustment is completed. The deflection angle of the spoiler plate 19 in the plunger assembly 3 is adjusted through the one-way shell 22, so that the flow distribution in the plunger assembly 3 can be adjusted after each stroke, thereby continuously changing the rotation direction of the traveling valve 4, and improving the uniformity of the wear distribution on the traveling valve 4.

[0033] At the end of the upstroke, just before the start of the downstroke, the piston assembly 3 in the movable valve 4 is gradually loosened by pressure, until the communication, the boost spring 25 drives the boost frame 24 to move upward, the boost frame 24 drives the movable valve 4 to move upward, so that the movable valve 4 accelerates away from the piston assembly 3, and the large flow channel can be established earlier, the pressure fluctuation is gentle, which is beneficial to prolong the service life of the valve, significantly reduce the opening delay, make the pump enter the effective suction or discharge stage faster, thereby improve the fullness coefficient and efficiency of the pump, when the downstroke ends, the upstroke needs to be carried out, the movable valve 4 gradually moves downward under the action of pressure and extrudes the boost frame 24, while the boost spring 25 is compressed, and the reset is completed.

[0034] The above has carried out the detailed introduction to the application, the principle and the implementation mode of the application are set forth by applying the specific example in this paper, the above example is only used for helping understanding the method of the application and its core idea; at the same time, for the general technical personnel in the art, according to the idea of the application, the specific implementation mode and the application range will have the change, according to the above, the content of the specification should not be understood as the limitation of the application.

Claims

1. A soft-seal reinforced plunger oil well pump characterized by: The utility model provides an improved oil pumping device, which comprises an oil pumping cylinder (1), a fixed valve seat (2) threadedly connected to the oil pumping cylinder (1), a plunger assembly (3) slidably connected to the oil pumping cylinder (1), a traveling valve (4) arranged in the plunger assembly (3), a fixed valve (41) arranged on the fixed valve seat (2), an oil pumping rod (5) threadedly connected to the plunger assembly (3), a first fixed frame (6) fixedly connected to the plunger assembly (3) and used for limiting the movement range of the traveling valve (4), mirror image distributed limiting grooves (7) arranged on the first fixed frame (6), and power rods (8) slidably connected to the mirror image distributed limiting grooves (7), respectively, wherein the power rods (8) in the mirror image distributed limiting grooves (7) are centrally symmetrically distributed, the power rods (8) are provided with deformation portions, the deformation portions of the power rods (8) are used for driving the traveling valve (4) to rotate, and a pressure boosting assembly is arranged on the plunger assembly (3) and used for improving the sealing effect between the plunger assembly (3) and the oil pumping cylinder (1). The plunger assembly (3) is provided with a power plate (9), the power plate (9) is fixedly connected with a first fan blade (10) arranged in a circumferential array, the power plate (9) is provided with mirror image distributed guide grooves (11), and the power rods (8) are slidably arranged in adjacent guide grooves (11).

2. A soft-seal reinforced plunger oil well pump according to claim 1, characterized in that: The plunger assembly (3) is fixedly connected with a fixed plate (12), the fixed plate (12) is rotatably connected with a rotating pin (13), a torsional spring is arranged between the fixed plate (12) and the rotating pin (13), and the rotating pin (13) is fixedly connected with the power plate (9).

3. A soft-seal reinforced plunger oil well pump according to claim 1, characterized in that: The pressure boosting assembly comprises a first sealing ring (31), the first sealing ring (31) is fixedly connected to the plunger assembly (3), the first sealing ring (31) is used for sealing the plunger assembly (3) and the oil pumping cylinder (1), a liquid storage cavity (14) is arranged in the first sealing ring (31), the liquid storage cavity (14) is filled with oil liquid used for transmitting pressure, the plunger assembly (3) is provided with mirror image and circumferentially arrayed pressure transmission holes (15), each of the pressure transmission holes (15) is provided with a diaphragm on a side away from the first sealing ring (31), and the pressure transmission holes (15) are in communication with the liquid storage cavity (14).

4. A soft-seal reinforced plunger oil well pump according to claim 3, characterized in that: Mirror image distributed second sealing rings (16) are arranged between the plunger assembly (3) and the oil pumping cylinder (1), and the first sealing ring (31) is located between the mirror image distributed second sealing rings (16).

5. A soft-seal reinforced plunger oil well pump according to claim 4, characterized in that: The second sealing rings (16) are provided with protruding portions (17), and the protruding portions (17) are used for guiding and cleaning oil sand attached between the plunger assembly (3) and the oil pumping cylinder (1).

6. A soft-seal reinforced plunger pump according to claim 5, characterized in that: The utility model further comprises a second fixed frame (18), the second fixed frame (18) is fixedly connected to the plunger assembly (3), and the second fixed frame (18) is rotatably connected with a spoiler (19).

7. A soft-seal reinforced plunger pump according to claim 6, characterized in that: The spoiler (19) is provided with a spoiler hole (20), and the flow area of the spoiler hole (20) is smaller than the flow area between the spoiler (19) and the plunger assembly (3).

8. A soft-seal reinforced plunger oil well pump according to claim 7, characterized in that: The spoiler (19) is fixed with second blades (21) which are uniformly distributed, the second fixed frame (18) is provided with a one-way shell (22), and a position adjusting torsion spring (23) is fixed between the one-way shell (22) and the spoiler (19).

9. A soft-seal reinforced plunger oil well pump according to claim 7, characterized in that: A boosting frame (24) is further included, the boosting frame (24) is slidingly connected to the first fixed frame (6), a boosting spring (25) is fixed between the boosting frame (24) and the plunger assembly (3), and the boosting frame (24) is used for pushing the traveling valve (4).

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