Damped valve stem structure

Abstract

The utility model relates to oilfield high -efficient exploitation technical field especially, relate to damping formula valve rod structure, this damping formula valve rod structure contains valve core pull rod (11), the rod -like structure of valve core pull rod (11) is arranged with frictional texturing, the frictional texturing of this valve core pull rod (11) passes through damping block (12), damping block (12) is located on the plate -like structure, and the plate -like structure fixedly connected with pull rod seat (18), and there is a hole in the middle part of pull rod seat (18) for installing piston pull rod (1), and piston pull rod (1) contains one head part can be clamped in the hole in the middle part of pull rod seat (18), valve pull rod can be lifted under the friction of damping block.

Description

Technical Field

[0001] This utility model relates to the field of efficient oilfield extraction technology, and in particular to a damped valve stem structure. Background Technology

[0002] In the field of oil extraction, in order to prevent wax buildup and crude oil solidification inside oil pipelines, ensure that crude oil maintains a sufficient flow rate in the pipelines to avoid serious impact on oil production due to reduced fluidity, and protect oil pipelines from corrosion and extend their service life, it is usually necessary to add specific chemical agents to oil pipelines regularly.

[0003] Currently, the commonly used method is manual operation, where workers inject chemicals into the wellhead pipeline once a day. While this method is simple and straightforward, its drawbacks are significant: firstly, the consumption of chemical reagents is enormous, making it uneconomical and inefficient; secondly, the process is highly dependent on manual labor, consuming substantial human resources. Since oil wells are typically located in remote mountainous or valley areas with extremely inconvenient transportation, continuous rainfall, especially heavy snowfall in winter, makes it difficult for workers to reach the site, forcing the interruption of chemical injection operations and posing a serious threat to continuous oil well production and pipeline protection. Therefore, developing an automated chemical injection device that can effectively replace manual operation is an urgent need.

[0004] To address the challenge of automated chemical dosing at oil wellheads, active pump solutions (such as electric pumps) have emerged in the market. These pumps utilize electric motors as a power source to pressurize and pump chemicals into the wellhead pipeline. However, in oil extraction sites, the oil and gas in the air are highly flammable and pose an explosion risk. Therefore, all electrical equipment must be equipped with strict explosion-proof measures, which undoubtedly increases the complexity and cost of the equipment.

[0005] Piston pumps are often considered due to their relatively simple working principle, but their limitations become apparent in applications requiring precise delivery of minute amounts of liquid. When the required output is extremely small, the piston's movement distance is too short, resulting in insufficient vacuum to be established within the pump chamber. The direct consequence of insufficient vacuum is that the one-way valve at the inlet cannot open properly due to insufficient pressure differential, preventing liquid from being drawn into the pump. Even more problematic is that if air gets into the pump chamber, it easily creates air resistance, making it difficult to effectively pump out the liquid even if the piston moves. We encountered and were deeply troubled by this critical technical bottleneck when developing a micro-volume continuous chemical dosing device (drip pump) for oil wells.

[0006] The design requirement for oil well drip pumps is to continuously and stably output approximately 10 liters of liquid per day. This means that each working cycle of the pump can only output an extremely small amount of liquid (possibly only a few milliliters or even less). However, after extensive testing, various commercially available check valves have proven ineffective in operating reliably under these extremely low flow and short stroke conditions. The delivery process is highly unstable, with frequent air resistance, and the pump's inlet valve often fails to open properly, resulting in no liquid output and severely impacting the equipment's practicality and reliability.

[0007] A critical issue is that certain chemicals cannot be mixed and stored in the same tank. When these chemicals come into contact, they react violently, producing solid precipitates. These precipitates can easily clog the pipes, valves, and nozzles of the dosing system, leading to system failure. This necessitates thoroughly cleaning away any residue from the previous chemical before each replacement. This process is not only extremely tedious, significantly increasing the workload and intensity for workers, but also consumes a considerable amount of time, severely reducing the overall efficiency and continuity of the dosing operation. Utility Model Content

[0008] The purpose of this utility model is to provide a damping valve stem structure with better performance. The specific purpose is explained in the several substantial technical effects described in the specific implementation section.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] Option 1: High-efficiency oilfield extraction new type of plunger pump and mechanical liquid inlet / outlet control method: Because the core components of dual-component and single-component pumps, such as the lifting power part, stroke limit part and valve part, have the same structure; dual-valve damping limit type new structure micro-precision plunger pump and liquid inlet / outlet control method and dual-valve damping limit type new structure micro-precision plunger pump.

[0011] Option 2: Damped valve stem structure, the core of which is the coordinated movement of the damping block and the friction pattern of the rod.

[0012] Option 3: A new type of two-component plunger pump, the core of which is the piston rod, which has been innovatively improved because it requires two-component injection.

[0013] Option 4: Mechanically controlled plunger pump valve, the core of which is used to cooperate with the piston to realize the entry, exit and closure of liquid.

[0014] Option 5: The power structure of the passive oil wellhead high-pressure chemical injection pump, the core of which is the docking of the nodding machine and the upper rod-shaped structure.

[0015] in:

[0016] Option 1, Option 2, Option 3, Option 4, and Option 5 are closely related and belong to a tightly integrated technical whole, but each of the five options has its own focus.

[0017] Option 1: A new type of plunger pump for high-efficiency oilfield extraction and a mechanical control method for fluid inlet and outlet;

[0018] A novel high-efficiency plunger pump for oilfield extraction is characterized in that it can perform valve control first and then drive piston movement in a single stroke, with the valve control and piston movement having a sequential start-up order.

[0019] A further technical solution of this utility model is that the high-efficiency oilfield extraction plunger pump is a two-component high-efficiency oilfield extraction plunger pump or a single-component high-efficiency oilfield extraction plunger pump.

[0020] A further technical solution of this utility model is that the new type of plunger pump for high-efficiency oilfield extraction includes a passive oil wellhead high-pressure chemical injection pump power structure. The upper end of the piston rod 1 includes a hinge structure, which is hinged to the nodding machine. The nodding machine can drive the piston rod 1 to move up and down in reciprocating motion. The gravity block 2 is nested on the piston rod cylinder 20, and the piston 8 is located in the pump body 6. A limiting block 10 is fixed on the piston rod 9. The limiting block 10 is a stepped block. The limiting block 10, as a stepped block, can be limited by the stepped hole 19. During the upward movement of the gravity block 2, it can drive the limiting block 10 to rise and further drive the piston rod 9 to rise. At this time, the piston rod 9 can move upward together with the gravity block. During the downward movement of the gravity block 2, the gravity block 2 and the limiting block 10 will separate. At this time, the piston rod 9 cannot move together with the gravity block, and the upper end of the limiting block 10 can contact the inner wall of the stepped hole 19.

[0021] It also includes a damped valve stem structure, which includes a valve core rod 11. The rod-shaped structure of the valve core rod 11 has friction grooves arranged on it, and these friction grooves pass through a damping block 12. The damping block 12 is located on a plate-shaped structure, which is fixedly connected to a rod seat 18. The rod seat 18 has a hole in the middle for mounting a piston rod 1, and the piston rod 1 includes a head that can be engaged in the hole in the middle of the rod seat 18. The valve rod can move up and down under the friction of the damping block. There are two valve core rods 11 arranged symmetrically around the rod seat 18. A mechanically controlled plunger pump valve is arranged below the valve core rods 11.

[0022] The mechanically controlled plunger pump valve includes a hollow mechanical valve core 361. The hollow mechanical valve core 361 is hollow in the middle, closed at both the top and bottom, and contains two sets of ports in the middle, namely a first port 362 and a second port 363. The diameter of the portion containing the first port 362 and the second port 363 is smaller than the diameter of the two ends and the middle portion of the hollow mechanical valve core 361. The first port 362 and the second port 363 communicate with the middle portion of the hollow mechanical valve core 361. The hollow mechanical valve core 361 is located in the valve sleeve. The valve core 361 can move up and down within the valve sleeve 16. Inlet and outlet sections are arranged at different heights within the valve sleeve 16. As the hollow mechanical valve core 361 moves up and down, the inlet and outlet sections can be connected or closed through the first port 362 and the second port 363. The valve is closed when the inlet and outlet pipe openings are not adjacent to the first port 362 or the second port 363. The valve is open when the inlet and outlet pipe openings correspond to the positions of the first port 362 and the second port 363.

[0023] A further technical solution of this utility model is that the single-component oilfield high-efficiency plunger pump includes a piston rod 9, the piston rod 9 includes a piston, the piston is located in the pump body 6; the piston rod 9 includes an isolation plate 21, the isolation plate 21 is located in the space at the bottom of the pump body 6 and can rise and fall with the piston rod.

[0024] A further technical solution of this utility model is that an inlet pipe 14 and an outlet pipe 15 are arranged on the pump body 6.

[0025] A further technical solution of this utility model is that the inlet pipe 14 and the outlet pipe 15 are each connected to a mechanically controlled plunger pump valve; or, the inlet pipe 14 is connected to a mechanically controlled plunger pump valve, and the outlet pipe 15 is directly connected to the oil well.

[0026] A further technical solution of this utility model is that the space above the piston 8 in the pump body 6 is the liquid medicine space 7.

[0027] A method for controlling the mechanical inlet and outlet of liquid in a novel high-efficiency plunger pump for oilfield extraction, characterized by utilizing any of the above-described novel high-efficiency plunger pumps for oilfield extraction, comprising the following steps:

[0028] In a single-stroke valve, valve control is performed first, followed by piston movement; the valve control and piston movement have a sequential initiation. Valve control is achieved through mechanical action.

[0029] In the initial position, gravity block 2 and limit block 10 are in a disengaged state;

[0030] At this moment, the mechanical inlet valve for liquid inlet is in the open state, while the mechanical inlet valve for liquid outlet is in the closed state.

[0031] The nodding machine drives the piston rod 1 to stretch upwards, and then the rod seat 18 and the gravity block 2 that are matched with the piston rod 1 rise as a whole. During this process, the rod seat 18 drives the plate structure to further drive the damping block 12 to rise. The friction textures arranged on the rod structure of the damping block 12 and the valve core rod 11 cause the valve core rod 11 to rise, and then drive the hollow mechanical valve core 361 contained in the mechanically controlled plunger pump valve to rise.

[0032] The mechanical inlet valve for liquid inlet is closed, and the mechanical inlet valve for liquid outlet is open;

[0033] Gravity block 2 then continues to move upwards, begins to contact limit block 10 and causes limit block 10 to rise; limit block 10 simultaneously causes piston rod 9 to rise.

[0034] At this time, piston rod 9 can move upward together with gravity block, and piston 8 squeezes the liquid that has been injected in liquid space 7 into the mechanical liquid inlet valve of liquid outlet.

[0035] After the spraying is completed, the nodding machine drives the piston rod 1 to move downward. During this process, the gravity block 2 and the limit block 10 are disengaged, and the piston 8 is reset.

[0036] The mechanical inlet valve is reopened to allow the pesticide solution to enter, while the mechanical inlet valve for dispensing the pesticide solution is reopened to close, thus initiating the next spraying cycle.

[0037] A further technical solution of this utility model is that when the piston rod 9 sprays, it can spray either two components or one component. When spraying two components, they do not affect each other. When the piston rod moves upward, the damping block drives the valve core rod to move upward, and the mechanical inlet valve closes. When the rod continues to move upward, the gravity block pushes the limit block upward, and the combined piston is driven upward by the limit block. The medium in the two pump chambers is pushed towards the outlet. The one-way valve for the outlet opens under the pressure of the medium, and the medium is squeezed out of the pump body. The two groups of liquids do not settle in the pipeline and directly enter the well.

[0038] When the valve core pull rod moves down, the mechanical inlet valve is opened under the action of gravity. At this time, the combined valve core continues to move down, creating a negative pressure in the pump chamber, and the liquid is drawn into the pump chamber.

[0039] A further technical solution of this utility model is that the pipe openings of the liquid inlet and liquid outlet correspond to the annular areas of the first port 362 and the second port 363. The annular area is the liquid communication space formed by the wall where the first port 362 and the second port 363 are located and the valve sleeve.

[0040] Option 2: Damped valve stem structure;

[0041] A damped valve stem structure is characterized in that it includes a valve core rod 11, the rod-shaped structure of which is provided with friction patterns, which pass through a damping block 12; the damping block 12 is located on a plate-shaped structure, which is fixedly connected to a rod seat 18; the rod seat 18 has a hole in the middle for mounting a piston rod 1, the piston rod 1 including a head that can be engaged in the hole in the middle of the rod seat 18; the valve rod can move up and down under the friction of the damping block.

[0042] A further technical solution of this utility model is that the valve core pull rod 11 comprises two rods and is symmetrically arranged around the pull rod seat 18.

[0043] A further technical solution of this utility model is that a mechanically controlled plunger pump valve is arranged below the valve core rod 11.

[0044] A further technical solution of this utility model is that a gravity block 2 is fixedly connected to the lower part of the pull rod seat 18.

[0045] A further technical solution of this utility model is that a stepped hole 19 is arranged on the lower inner wall of the pull rod seat 18.

[0046] Option 3: A new type of two-component plunger pump;

[0047] A novel two-component oilfield high-efficiency plunger pump is characterized in that the piston rod of the novel oilfield high-efficiency plunger pump comprises two connected sections, namely piston rod section one 91 and piston rod section two 92, each of piston rod section one 91 and piston rod section two 92 comprising a piston, namely piston one and piston two, which are respectively located in pump body one 61 and pump body two 62.

[0048] A further technical solution of this utility model is that pump body 1 61 and pump body 2 62 are arranged vertically.

[0049] A further technical solution of this utility model is that pump body 1 61 and pump body 2 62 are connected by a flange but are isolated from each other.

[0050] A further technical solution of this utility model is that the isolation between pump body 1 61 and pump body 2 62 is achieved by a first isolation plate 211 and a second isolation plate 212. The first isolation plate 211 and the second isolation plate 212 are respectively located in the space at the bottom of pump body 1 61 and pump body 2 62 and can rise and fall with the piston rod.

[0051] A further technical solution of this utility model is that an inlet pipe 14 and an outlet pipe 15 are respectively connected to pump body 1 61 and pump body 2 62.

[0052] A further technical solution of this utility model is that pump body 61 corresponds to inlet pipe 141 and outlet pipe 151; pump body 62 corresponds to inlet pipe 142 and outlet pipe 152.

[0053] A further technical solution of this utility model is that each of the first liquid inlet pipe 141 and the second liquid inlet pipe 142 is connected to a mechanical liquid inlet valve 13. The mechanical liquid inlet valve 13 is a mechanically controlled plunger pump valve. The liquid inlet part of each mechanical liquid inlet valve 13 corresponds to an independent component, that is, the first pump body 61 and the second pump body 62 each correspond to a component.

[0054] Option 4: Mechanically controlled plunger pump valve;

[0055] A mechanically controlled plunger pump valve is characterized in that it includes a hollow mechanical valve core 361, which is hollow in the middle and closed at the top and bottom. The middle portion includes two sets of ports, namely a first port 362 and a second port 363. The diameter of the portion containing the first port 362 and the second port 363 is smaller than the diameter of the two ends and the middle portion of the hollow mechanical valve core 361. The first port 362 and the second port 363 are connected to the middle portion of the hollow mechanical valve core 361.

[0056] A further technical solution of this utility model is that the hollow mechanical valve core 361 is located in the valve sleeve and can move up and down in the valve sleeve 16.

[0057] A further technical solution of this utility model is that an inlet portion and an outlet portion are arranged at different heights of the valve sleeve 16. As the hollow mechanical valve core 361 rises and falls, the inlet portion and the outlet portion can be connected or closed through the first port 362 and the second port 363.

[0058] A further technical solution of this utility model is that the valve is closed when the pipe openings of the liquid inlet and liquid outlet are in close contact with the non-first port 362 and the second port 363.

[0059] A further technical solution of this utility model is that the valve is opened when the pipe openings of the liquid inlet and liquid outlet correspond to the positions of the first port 362 and the second port 363.

[0060] A further technical solution of this utility model is that one or more O-rings are installed in the area where the first port 362 and the second port 363 are located.

[0061] A further technical solution of this utility model is that the upper part of the hollow mechanical valve core 361 is threaded onto the valve core pull rod 11.

[0062] Option 5: Passive oil wellhead high-pressure chemical injection pump power structure;

[0063] The power structure of the passive oil wellhead high-pressure chemical injection pump is characterized in that the upper end of the piston rod 1 includes a hinge structure, which is hinged to the head-nodding machine, and the head-nodding machine can drive the piston rod 1 to move up and down in reciprocating motion.

[0064] A further technical solution of this utility model is that the gravity block 2 is nested on the piston rod cylinder 20, and the piston 8 is located in the pump body 6.

[0065] A further technical solution of this utility model is that a limiting block 10 is fixed on the piston rod 9, and the limiting block 10 is a stepped block.

[0066] A further technical solution of this utility model is that the limiting block 10, as a step block, can be limited by the step hole 19.

[0067] A further technical solution of this utility model is that during the upward movement of the gravity block 2, it can drive the limiting block 10 to rise and further drive the piston rod 9 to rise. At this time, the piston rod 9 can move upward together with the gravity block.

[0068] A further technical solution of this utility model is that during the downward movement of the gravity block 2, the gravity block 2 and the limiting block 10 will separate. At this time, the piston rod 9 cannot move together with the gravity block, and the upper end of the limiting block 10 can contact the inner wall of the stepped hole 19.

[0069] The present invention, employing the above technical solution, offers the following advantages over existing technologies: Since the closing action of the one-way valve is entirely controlled by a mechanical structure, even the smallest micron-level movement of the piston can reliably draw in liquid media, ensuring accurate and leak-free output each time. This precise opening and closing characteristic enables the system to achieve highly repeatable and accurate metering. Simultaneously, because the core component uses a purely mechanical valve design, it fundamentally eliminates vapor retention or gas blockage caused by fluid phase changes such as liquid vaporization, ensuring absolute unobstructed flow. This mechanical linkage valve assembly has a clear and intuitive working principle, a compact and efficient structural design, significantly reducing raw material consumption in production and offering outstanding cost advantages and ease of maintenance. The innovative two-stage linkage of the piston and valve solves a technical challenge. The core advantage of this pump lies in its unique internal structural design, which effectively avoids and eliminates gas blockage, providing an ideal solution for the automatic addition of trace amounts of chemical reagents at oil wellheads. Attached Figure Description

[0070] To further illustrate this utility model, the following description is provided in conjunction with the accompanying drawings:

[0071] Figure 1 This is a schematic diagram of the implementation structure of the single-component drug delivery system of the utility model.

[0072] Figure 2 This is a schematic diagram of the implementation structure of the two-component drug delivery system of the utility model.

[0073] Figure 3 This is a structural diagram of a utility model without a mechanical valve.

[0074] Figure 4 A perspective view of the utility model;

[0075] Figure 5 This is a three-dimensional sectional view of the utility model.

[0076] Figure 6 A perspective view of the mechanical valve core of the utility model;

[0077] Figure 7 This is a schematic diagram of the closed state of the mechanical valve core of the utility model.

[0078] Figure 8 This is a schematic diagram showing the open state of the mechanical valve core of the utility model.

[0079] Figure 9 The initial position of the utility model is the valve state when the gravity block and the limiting block are not in contact, where the left side is the liquid outlet valve in the closed state and the right side is the mechanical liquid inlet valve 13 in the open state.

[0080] Figure 10 The image shows the valve status in liquid condition. The left side is the open outlet valve, and the right side is the closed mechanical inlet valve.

[0081] The components are as follows: 1. Piston rod; 2. Gravity block; 3. Mounting base plate; 4. Pump body inlet; 5. Pump body liquid outlet; 6. Pump body; 7. Liquid space; 8. Piston; 9. Piston rod; 10. Limiting block; 11. Valve core rod; 12. Damping block; 13. Mechanical inlet valve; 14. Inlet pipe; 15. Outlet pipe; 141. Inlet pipe one; 142. Inlet pipe two; 151. Outlet pipe one; 152. Outlet pipe two; 91. Piston rod section one; 92. Piston rod section two; 16. Valve sleeve; 17. Injection port; 18. Rod seat; 361. Hollow mechanical valve core; 362. First port; 363. Second port; 19. Stepped hole; 20. Piston rod cylinder; 61. Pump body one; 62. Pump body two; 21. Isolation plate; 211. First isolation plate; 212. Second isolation plate. Detailed Implementation

[0082] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0083] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0084] This patent provides multiple parallel solutions; the different descriptions represent improved or parallel solutions based on a basic solution. Each solution has its own unique characteristics. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other. Fixing methods not described herein can be any type of fixing, such as threaded fixing, bolt fixing, or adhesive bonding.

[0085] For ease of understanding, the embodiments are presented by first introducing some parts and then connecting them to the overall technology.

[0086] Example 1: Combining Figure 1 and Figure 2 ;

[0087] A damped valve stem structure is characterized in that it includes a valve core rod 11, the rod-shaped structure of which is provided with friction patterns, which pass through a damping block 12; the damping block 12 is located on a plate-shaped structure, which is fixedly connected to a rod seat 18; the rod seat 18 has a hole in its middle for mounting a piston rod 1, the piston rod 1 including a head that can be engaged in the hole in the middle of the rod seat 18; the valve rod can rise and fall under the frictional force of the damping block. The substantive technical effect and its implementation process, i.e., the basic function, of this technical solution are as follows: [Combined with...] Figure 1 , Figure 2 , Figure 4 and Figure 5 This solution provides a combined actuation mechanism. The valve's movement is achieved by the frictional force of the damping block pulling it upwards. As the lever continues to pull upwards, the valve lever reaches its limit and stops moving, then slides within the damping block. This provides a structure that allows both movement and sliding together. It innovatively solves the problem of dual-stroke control.

[0088] Example 2: As a further improvement, parallel, or optional independent solution, the valve core rod 11 comprises two rods symmetrically arranged around the rod seat 18. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 1 , Figure 2 and Figure 3 It can achieve simultaneous pulling from both sides, resulting in balanced force.

[0089] Example 3: As a further improvement, parallel, or optional independent solution, a mechanically controlled plunger pump valve is arranged below the valve core rod 11. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows:

[0090] Because the closing action of the one-way valve is entirely controlled by a mechanical structure, even the smallest micron-level movement of the piston can reliably draw in liquid media, ensuring accurate and leak-free output every time. This precise opening and closing characteristic enables the system to achieve highly repeatable and accurate metering. Simultaneously, the core component's purely mechanical valve design fundamentally eliminates vapor retention or air resistance caused by fluid phase changes such as liquid vaporization, guaranteeing absolute unobstructed flow. This mechanical linkage valve assembly has a straightforward working principle and a compact, efficient structure, significantly reducing raw material consumption in manufacturing and offering outstanding cost advantages and ease of maintenance.

[0091] Example 4: As a further improvement, parallel, or optional independent solution, a gravity block 2 is fixedly connected to the lower part of the pull rod seat 18. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 1 and Figure 2 and Figure 3 This structure is used as part of the overall lifting mechanism.

[0092] Example 5: As a further improvement, parallel, or optional independent solution, a stepped hole 19 is arranged on the lower inner wall of the pull rod seat 18. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: for limiting movement.

[0093] Example 6: As a further possible improvement, parallel solution, or optional independent solution, a novel two-component oilfield high-efficiency plunger pump is characterized in that the piston rod of the novel oilfield high-efficiency plunger pump comprises two connected sections, namely piston rod section one 91 and piston rod section two 92. Each of piston rod section one 91 and piston rod section two 92 contains a piston, namely piston one and piston two, respectively, which are located in pump body one 61 and pump body two 62. The substantial technical effect and its implementation process, i.e., the basic function, of this technical solution are as follows: [Combined with...] Figure 2 This enables two-component pesticide application.

[0094] Example 7: As a further improvement, parallel, or optional independent solution, pump body 1 61 and pump body 2 62 are arranged vertically. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 2 This provides the specific arrangement of the pump bodies to ensure that the liquids do not mix in the pipeline. Once inside the oil well, the large diameter prevents any problems.

[0095] Example 8: As a further improvement, parallel, or optional independent solution, pump body 1 61 and pump body 2 62 are connected by a flange but isolated from each other. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 2 It provides specific connection structures and methods.

[0096] Example 9: As a further improvement, parallel, or optional independent solution, the isolation between pump body 1 61 and pump body 2 62 is achieved through a first isolation plate 211 and a second isolation plate 212. The first isolation plate 211 and the second isolation plate 212 are located in the spaces at the bottom of pump body 1 61 and pump body 2 62, respectively, and can rise and fall with the piston rod. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 2 This achieves specific isolation.

[0097] Example 10: As a further improvement, parallel, or optional independent solution, pump body 1 61 and pump body 2 62 are each connected to an inlet pipe 14 and an outlet pipe 15. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 2 It can achieve two-component transport and delivery.

[0098] Example 11: As a further possible improvement, parallel solution, or optional independent solution, pump body 1 61 corresponds to inlet pipe 141 and outlet pipe 151; pump body 2 62 corresponds to inlet pipe 2 142 and outlet pipe 2 152.

[0099] Example 12: As a further improvement, parallel, or optional independent solution, inlet pipe 141 and inlet pipe 242 are each connected to a mechanical inlet valve 13. The mechanical inlet valve 13 is a mechanically controlled plunger pump valve. The inlet part of each mechanical inlet valve 13 corresponds to an independent component, that is, pump body 161 and pump body 262 each correspond to a component.

[0100] Example 13: As a further possible improvement, parallel solution, or optional independent solution, a mechanically controlled plunger pump valve is characterized in that it includes a hollow mechanical valve core 361, which is hollow in the middle and closed at the top and bottom. The middle portion includes two sets of ports, namely a first port 362 and a second port 363. The diameter of the portion containing the first port 362 and the second port 363 is smaller than the diameter of the two ends and the middle portion of the hollow mechanical valve core 361. The first port 362 and the second port 363 are connected to the middle portion of the hollow mechanical valve core 361. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 5 , Figure 6 , Figure 7 and Figure 8 The above solutions provide specific methods for achieving mechanical conduction, which can effectively realize liquid flow and control.

[0101] Example 14: As a further improvement, parallel, or alternative independent solution, the hollow mechanical valve core 361 is located in the valve sleeve and can move up and down within the valve sleeve 16.

[0102] Example 15: As a further improvement, parallel, or optional independent solution, an inlet and an outlet are arranged at different heights of the valve sleeve 16. As the hollow mechanical valve core 361 rises and falls, the inlet and outlet can be opened or closed through the first port 362 and the second port 363.

[0103] Example 16: As a further improvement, parallel, or optional independent solution, the valve is closed when the inlet and outlet pipe openings are in close contact with the non-first port 362 and the second port 363.

[0104] Example 17: As a further improvement, parallel, or optional independent solution, the valve is opened when the pipe openings of the liquid inlet and liquid outlet correspond to the positions of the first port 362 and the second port 363.

[0105] Example 18: As a further improvement, parallel, or optional independent solution, one or more O-rings are installed in the area where the first port 362 and the second port 363 are located. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 6 , Figure 7 and Figure 8 This ensures better sealing of the overall solution.

[0106] Example 19: As a further improvement, parallel solution, or optional independent solution, the upper thread of the hollow mechanical valve core 361 is threaded onto the valve core pull rod 11. The substantive technical effect and implementation process of the technical solution here, i.e., its basic function, are as follows: it provides a specific docking structure; similar visual structures are all within the protection scope of this patent.

[0107] Example 20: As a further possible improvement, parallel solution, or optional independent solution, the power structure of the passive oil wellhead high-pressure chemical injection pump is characterized in that the upper end of the piston rod 1 includes a hinge structure, which is hinged to the nodding donkey machine. The nodding donkey machine can drive the piston rod 1 to move up and down in reciprocating motion. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: The nodding donkey machine, i.e., the donkey head, is not shown and is existing technology in the petroleum field.

[0108] Example 21: As a further improvement, parallel, or alternative independent solution, the gravity block 2 is nested on the piston rod cylinder 20, and the piston 8 is located in the pump body 6.

[0109] Example 22: As a further improvement, parallel, or optional independent solution, a limiting block 10 is fixed on the piston rod 9. The limiting block 10 is a stepped block. The substantial technical effect and implementation process of the technical solution here, i.e., its basic function, are as follows: [Combined with...] Figure 1 , Figure 2 , Figure 3 and Figure 5 This limiting block is the core component, used for both upper and lower positioning.

[0110] Example 23: As a further improvement, parallel solution, or optional independent solution, the limiting block 10 can be limited by the step hole 19 as a step block.

[0111] Example 24: As a further improvement, parallel, or optional independent solution, during the upward movement of the gravity block 2, the limiting block 10 can be driven to rise, which in turn drives the piston rod 9 to rise. At this time, the piston rod 9 can move upward together with the gravity block.

[0112] Example 25: As a further improvement, parallel, or optional independent solution, during the downward movement of gravity block 2, gravity block 2 and limit block 10 will separate. At this time, piston rod 9 cannot move together with gravity block, and the upper end of limit block 10 can contact the inner wall of step hole 19.

[0113] Example 26: As a further possible improvement, parallel solution, or optional independent solution, a novel high-efficiency plunger pump for oilfield extraction is characterized in that it can perform valve control first and then drive piston movement in a single stroke, with the valve control and piston movement having a sequential initiation. The substantive technical effect and its implementation process, i.e., the basic function, of this technical solution are as follows: (Referring to all accompanying drawings):

[0114] Example 27: As a further possible improvement, parallel solution, or optional independent solution, the new type of high-efficiency oilfield extraction plunger pump is a two-component new type of high-efficiency oilfield extraction plunger pump or a single-component new type of high-efficiency oilfield extraction plunger pump. The substantive technical effects and implementation process of the technical solution described herein, i.e., its basic functions, are as follows: A new type of high-efficiency oilfield plunger pump includes a passive oil wellhead high-pressure chemical injection pump power structure. The upper end of the piston rod 1 includes a hinge structure, which is hinged to a head-bearing machine. The head-bearing machine can drive the piston rod 1 to move up and down in reciprocating motion. A gravity block 2 is nested on the piston rod cylinder 20, and the piston 8 is located in the pump body 6. A limiting block 10 is fixed on the piston rod 9. The limiting block 10 is a stepped block. The limiting block 10, as a stepped block, can be limited by the stepped hole 19. During the upward movement of the gravity block 2, it can drive the limiting block 10 to rise, further driving the piston rod 9 to rise. At this time, the piston rod 9 can move upward together with the gravity block. During the downward movement of the gravity block 2, the gravity block 2 and the limiting block 10 will separate. At this time, the piston rod 9 cannot move together with the gravity block, and the upper end of the limiting block 10 can contact the inner wall of the stepped hole 19.

[0115] It also includes a damped valve stem structure, which includes a valve core rod 11. The rod-shaped structure of the valve core rod 11 has friction grooves arranged on it, and these friction grooves pass through a damping block 12. The damping block 12 is located on a plate-shaped structure, which is fixedly connected to a rod seat 18. The rod seat 18 has a hole in the middle for mounting a piston rod 1, and the piston rod 1 includes a head that can be engaged in the hole in the middle of the rod seat 18. The valve rod can move up and down under the friction of the damping block. There are two valve core rods 11 arranged symmetrically around the rod seat 18. A mechanically controlled plunger pump valve is arranged below the valve core rods 11.

[0116] Example 28: As a further possible improvement, parallel solution, or optional independent solution, the mechanically controlled plunger pump valve includes a hollow mechanical valve core 361. The hollow mechanical valve core 361 is hollow in the middle and closed at both the top and bottom. It includes two sets of ports in the middle, namely a first port 362 and a second port 363. The diameter of the portion containing the first port 362 and the second port 363 is smaller than the diameter of the two ends and the middle portion of the hollow mechanical valve core 361. The first port 362, the second port 363, and the middle portion of the hollow mechanical valve core 361... The hollow mechanical valve core 361 is located in the valve sleeve and can move up and down within the valve sleeve 16. Inlet and outlet sections are arranged at different heights within the valve sleeve 16. As the hollow mechanical valve core 361 moves up and down, the inlet and outlet sections can be connected or closed through the first port 362 and the second port 363. The valve is closed when the inlet and outlet pipe openings are close to positions other than the first port 362 and the second port 363. The valve is open when the inlet and outlet pipe openings correspond to the positions of the first port 362 and the second port 363.

[0117] Example 29: As a further possible improvement, parallel solution, or optional independent solution, the single-component high-efficiency oilfield extraction novel plunger pump includes a piston rod 9, which includes a piston located in the pump body 6; the piston rod 9 includes an isolation plate 21, which is located in the space at the bottom of the pump body 6 and can rise and fall with the piston rod. The substantial technical effect and implementation process of the technical solution described above, i.e., its basic function, are as follows: a mechanical liquid inlet and outlet control method for the high-efficiency oilfield extraction novel plunger pump, characterized in that, using any one of the above-described high-efficiency oilfield extraction novel plunger pumps, the following steps are included:

[0118] In a single-stroke valve, valve control is performed first, followed by piston movement; the valve control and piston movement have a sequential initiation. Valve control is achieved through mechanical action.

[0119] In the initial position, gravity block 2 and limit block 10 are in a disengaged state;

[0120] At this moment, the mechanical inlet valve for liquid inlet is in the open state, while the mechanical inlet valve for liquid outlet is in the closed state.

[0121] The nodding machine drives the piston rod 1 to stretch upwards, and then the rod seat 18 and the gravity block 2 that are matched with the piston rod 1 rise as a whole. During this process, the rod seat 18 drives the plate structure to further drive the damping block 12 to rise. The friction textures arranged on the rod structure of the damping block 12 and the valve core rod 11 cause the valve core rod 11 to rise, and then drive the hollow mechanical valve core 361 contained in the mechanically controlled plunger pump valve to rise.

[0122] The mechanical inlet valve for liquid inlet is closed, and the mechanical inlet valve for liquid outlet is open;

[0123] Gravity block 2 then continues to move upwards, begins to contact limit block 10 and causes limit block 10 to rise; limit block 10 simultaneously causes piston rod 9 to rise.

[0124] At this time, piston rod 9 can move upward together with gravity block, and piston 8 squeezes the liquid that has been injected in liquid space 7 into the mechanical liquid inlet valve of liquid outlet.

[0125] After the spraying is completed, the nodding machine drives the piston rod 1 to move downward. During this process, the gravity block 2 and the limit block 10 are disengaged, and the piston 8 is reset.

[0126] The mechanical inlet valve is reopened to allow the pesticide solution to enter, while the mechanical inlet valve for dispensing the pesticide solution is reopened to close, thus initiating the next spraying cycle.

[0127] Example 30: As a further improvement, parallel, or optional independent solution, the inlet pipe 14 and the outlet pipe 15 are each connected to a mechanically controlled plunger pump valve; or, the inlet pipe 14 is connected to a mechanically controlled plunger pump valve, and the outlet pipe 15 is directly connected to the oil well. The substantive technical effect and implementation process of the technical solution herein, i.e., its basic function, are as follows: Two solutions are provided, both within the scope of protection of this patent.

[0128] Example 31: As a further possible improvement, parallel solution, or optional independent solution, the space above the piston 8 in the pump body 6 is a liquid medicine space 7.

[0129] Example 32: As a further improvement, parallel, or optional independent solution, when the piston rod 9 dispenses the chemical, it can be done through two-component or single-component dispensing. When dispensing two components, they do not interfere with each other. When the piston rod moves upward, the damping block drives the valve core rod upward, and the mechanical inlet valve closes. When the rod continues to move upward, the gravity block pushes the limit block upward, and the combined piston is driven upward by the limit block. The medium in the two pump chambers is pushed towards the outlet. The outlet check valve opens under the pressure of the medium, and the medium is squeezed out of the pump body. The two sets of liquids do not settle in the pipeline and directly enter the well.

[0130] When the valve core pull rod moves down, the mechanical inlet valve is opened under the action of gravity. At this time, the combined valve core continues to move down, creating a negative pressure in the pump chamber, and the liquid is drawn into the pump chamber.

[0131] Example 33: As a further possible improvement, parallel solution, or optional independent solution, the pipe openings of the liquid inlet and outlet sections correspond to the annular areas of the first port 362 and the second port 363. This annular area is the liquid communication space formed by the wall where the first port 362 and the second port 363 are located and the valve sleeve. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 5 That is, it can connect and realize the drug delivery and dispensing.

[0132] This patent still utilizes the power of a nodding pump to perform imported drug dispensing. The biggest difference lies in the fact that the nodding pump moves upward to pull the pump piston, forcing the drug out. Its gravity block only serves to draw in the drug solution. This sub-structure pump does not require a very heavy gravity block; it only needs to ensure the piston returns to its original position. The gravity block weighs approximately 5 kg, and its output pressure can reach over 10 kPa. This prevents the drug solution pipeline from becoming blocked.

[0133] When the pump moves upward under the action of the pumping unit, the volume of the cavity decreases, the medium is compressed, the inlet check valve is closed under pressure, and the outlet check valve is opened, at which point the liquid is forced out of the pump body. Conversely, when the pump moves downward, the pull rod falls, the gravity block moves downward, driving the piston downward, the volume of the cavity increases, creating negative pressure, the inlet valve is opened, the outlet valve is closed, and the liquid is drawn into the cavity.

[0134] One of the core aspects of this case lies in the two-stage linkage between the piston and the valve. Before the piston moves, the relevant one-way valves are opened and closed, and then the piston begins to move. For example, when the inlet valve is opened, the outlet valve must simultaneously close; when the inlet valve is closed, the outlet valve must simultaneously open. All these actions are accomplished through mechanical movement.

[0135] Two-component dosing refers to the practice of not adding two chemicals simultaneously, as they will immediately form a precipitate upon contact. One chemical is added before the second, because the amount sprayed each time is very small, and the amount of precipitate formed in the oil pipeline is negligible. Two pipes come out from the drip pump, but they do not connect to the same pipe. Each chemical must follow its own separate path.

[0136] It should be noted that the multiple solutions provided in this patent include their own basic solutions, which are independent of each other and do not restrict each other. However, they can also be combined with each other without conflict to achieve multiple effects.

[0137] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims.

Claims

1. A damped valve stem structure, characterized in that, The damped valve stem structure includes a valve core rod (11), on which friction patterns are arranged, and the friction patterns of the valve core rod (11) pass through a damping block (12); the damping block (12) is located on a plate-like structure, and the plate-like structure is fixedly connected to a rod seat (18); the rod seat (18) has a hole in the middle for installing a piston rod (1), and the piston rod (1) includes a head that can be snapped into the hole in the middle of the rod seat (18); the valve rod can rise and fall under the friction of the damping block.

2. The damping valve stem structure as described in claim 1, characterized in that, The valve core rod (11) comprises two rods and is arranged symmetrically around the rod seat (18).

3. The damping valve stem structure as described in claim 1, characterized in that, A mechanically controlled plunger pump valve is arranged below the valve core rod (11).

4. The damping valve stem structure as described in claim 1, characterized in that, A gravity block (2) is fixedly connected to the bottom of the pull rod seat (18).

5. The damping valve stem structure as described in claim 1, characterized in that, A stepped hole (19) is arranged on the lower inner wall of the tie rod seat (18).

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