Modular piston chamber pump

Abstract

The utility model relates to oilfield high -efficient exploitation technical field especially, relate to combined piston cavity pump. The piston cavity pump contains piston cavity, and the both sides of the piston cavity stretch into piston rod (603), and the end of piston rod (603) is arranged with the opposite position piston (601); the space between two group's opposite position piston (601) is middle part piston space (608), and the space between two group's opposite position piston (601) and piston cavity is side piston space (602); middle part piston space (608) is arranged with liquid outlet middle part liquid outlet (609) and liquid inlet middle part liquid inlet pipe (404); side piston space (602) is arranged with both sides distribution port (4032) and liquid outlet both sides liquid outlet pipe (607); the valve (610) of liquid outlet middle part liquid outlet can be driven with valve linkage lever (306) and be linked.

Description

Technical Field

[0001] This utility model relates to the field of efficient oilfield extraction technology, and in particular to a combined piston chamber pump. Background Technology

[0002] A opposed-piston pump is a special reciprocating or rotary fluid transport device that uses a symmetrically arranged dual-piston / rotor structure to counteract mechanical vibrations through their synchronous reverse motion. This equipment is primarily used in oil and gas extraction to relay or lift complex multiphase mixtures (such as crude oil, associated gas, formation water, and sediment) from the wellhead to surface processing facilities. Its unique symmetrical design offers significant advantages in balancing inertial forces and reducing vibration and noise.

[0003] However, this structure also presents a series of significant challenges: First, solid particles (such as silt, drill cuttings, and metal shavings) in the pumped medium can easily intrude and become stuck in the tiny gaps between the precisely fitted opposed pistons or rotors, causing excessive wear or even blockage. This blockage not only directly leads to a sharp decrease in the effective volumetric efficiency of the pump chamber, affecting the stability and flow accuracy of the pump, but may also exacerbate the wear of dynamic seals and mating surfaces due to the continuous friction of the particles, thereby leading to seal failure and the risk of media leakage. To alleviate this problem, a multi-stage pretreatment filtration system is usually required before the pump to intercept solid impurities, but this undoubtedly increases the initial investment cost of the equipment, the burden of daily maintenance and filter replacement, and the complexity of the overall process. Second, although opposed pumps perform well in vibration control, they are still inherently high-energy-consuming equipment (compared to some high-efficiency centrifugal or positive displacement pumps). Their consistently high energy consumption often makes it difficult to meet the increasingly stringent "energy conservation and emission reduction" requirements in the current green oilfield construction, restricting their large-scale application and promotion in the pursuit of low-carbon goals.

[0004] Meanwhile, this structure also suffers from the following significant technical bottlenecks: opposed pumps typically operate under continuous high energy consumption, resulting in high operating costs; their valve control systems are complex to design and require extremely high response accuracy, making operation and maintenance difficult; and opposed pumps without valve control are prone to leakage and media backflow due to dynamic pressure fluctuations, severely affecting delivery efficiency and system reliability; furthermore, the pump chamber and key moving parts of opposed pumps are at risk of abnormal wear under high load and solid media scouring conditions, significantly shortening equipment lifespan and increasing the probability of unplanned downtime. These combined factors collectively limit the application potential of opposed pumps in a wider range of industrial scenarios.

[0005] On August 5, 2025, a search was conducted in the China Patent Publication Database using "opposed pump and bevel gear and wear and valve and linkage and piston" as the abstract keywords, with the option to allow synonym expansion, but no relevant literature was found.

[0006] On August 5, 2025, an abstract search was conducted on CNKI (China National Knowledge Infrastructure) for the keywords "opposed pump and bevel gear and wear and valve and linkage and piston", but no relevant literature was found.

[0007] On August 5, 2025, a search was conducted on the website of the United States Patent and Trademark Office for the term "Opposed pump with bevel gear with wear with valve with linkage with piston", but no relevant literature was found; the search URL is https: / / ppubs.uspto.gov / pubwebapp / .

[0008] On August 5, 2025, a search was conducted on WIPO's website https: / / patentscope2.wipo.int / for the term "Opposed pump and bevel gear and wear and valve and linkage and piston", but no relevant literature was found.

[0009] On August 5, 2025, a search was conducted on the website of the Japan Patent Office (https: / / www.j-platpat.inpit.go.jp / ) for the term "Opposed pump and bevel gear and wear and valve and linkage and piston," but no relevant literature was found.

[0010] It is completely different from the concept of this patent. Utility Model Content

[0011] The purpose of this utility model is to provide a more effective combined piston chamber pump, the specific purpose of which is explained in the several substantial technical effects described in the detailed implementation section.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] Option 1: High-efficiency oilfield extraction using a dual-piston, three-part valve, vibration-free, power-linked opposed pump and delivery method;

[0014] Option 2: A cam system and linkage method for efficient oilfield extraction that can link valves and pistons. The core is protection: the cam and the lever above the cam, the linkage rod structure below the cam, etc.

[0015] Option 3: A combined piston chamber pump, the core of which is a combination of a single pump housing and an internal piston;

[0016] Option 4: A connecting rod and piston linkage structure that avoids piston chamber leakage. The core of this structure is the docking structure of the connecting rod, cam, and piston with track constraints.

[0017] Option 5: Opposite pump linkage power structure, the core of which is a power system with integrated alignment design of bevel gears;

[0018] in:

[0019] 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.

[0020] To achieve the above objectives, the present invention adopts the following technical solution:

[0021] Option 1:

[0022] A high-efficiency oilfield extraction dual-piston three-part valve vibration-free power linkage opposed pump, characterized in that the opposed pump is arranged on the workbench 2;

[0023] The workbench 2 is equipped with a counter-pump linkage power structure, characterized in that the linkage power structure is a counter-pump bevel gear system, the counter-pump bevel gear system includes a power shaft 301, and a three-bevel gear system is arranged on the power shaft;

[0024] Each three-bevel gear system includes a driving bevel gear 302 and two symmetrically arranged horizontal bevel gears 303; the three bevel gears mesh with each other and are subjected to balanced forces, thus preventing excessive vibration.

[0025] The power shaft 301 is connected to the motor 3. The linkage power structure is a opposed bevel gear system. Two sets of three bevel gear systems are arranged on the power shaft. The two sets of three bevel gear systems are arranged on both sides of the power shaft 301, and the bevel gear systems on both sides are symmetrically arranged.

[0026] A double-acting cam 304 is coaxially mounted on a horizontal bevel gear 303; four horizontal bevel gears 303 correspond to four double-acting cams 304; in the two sets of three bevel gear systems, two double-acting cams 304 on the same side can make the opposite pistons 601 in the same piston cylinder move in opposite directions simultaneously.

[0027] The mounting base for mounting the shaft of the double-acting cam 304 is provided with a structure for mounting the lever assembly 305, and a rod is arranged between the structures for mounting the lever assembly 305.

[0028] The double-acting cam 304 is part of a cam system for efficient oilfield extraction that can link valves and pistons. This cam system includes a double-acting cam 304, a cam center hole 3045 arranged in the middle of the double-acting cam 304, a valve linkage rod hinge rod hole 3042 arranged on the side of the double-acting cam 304, and two cam impact protrusions 3043 arranged on the edge of the double-acting cam 304, with an arc-shaped section between the two cam impact protrusions 3043; a cam linkage shaft 3041 is installed in the valve linkage rod hinge rod hole 3042, and the cam linkage shaft 3041 is hinged to the piston linkage rod 307. A track slider 310 is fixedly connected to the hinged rod of the piston linkage rod 307, and the track slider 310 can move vertically forward along the track. The hinged rod of the piston linkage rod 307 passes through the piston cover 308, and a positioning piston 601 is arranged at the end of the hinged rod of the piston linkage rod 307.

[0029] The impact arm 3051 and the arc-shaped linkage arm 3052 have a hole at the joint position for a rod for rotation to pass through; the impact arm 3051 and the arc-shaped linkage arm 3052 constitute the lever assembly 305;

[0030] The arc-shaped linkage arm 3052 includes a valve linkage rod hinge position 3053. The bottom of the impact arm 3051 is equipped with a rolling structure to contact the edge of the double-acting cam 304. The valve linkage rod hinge position 3053 is hinged to the valve linkage rod 306. The end of the valve linkage rod 306 passes through the valve cover and is connected to the valve 610 of the liquid outlet in the middle of the liquid outlet. The pushing and pulling of the valve linkage rod 306 can control the opening and closing of the liquid outlet 611 in the middle of the liquid outlet.

[0031] The combined piston chamber pump includes a piston chamber with piston rods 603 extending into both sides of the piston chamber. The piston rods 603 are equipped with opposing pistons 601 at their ends. The space between the two sets of opposing pistons 601 is the central piston space 608, and the space between each of the two sets of opposing pistons 601 and the piston chamber is the side piston space 602.

[0032] The central piston space 608 is provided with a liquid outlet 609 and a liquid inlet pipe 404.

[0033] The side piston space 602 is provided with two side distribution ports 4032 and two side liquid outlet pipes 607;

[0034] The valve 610 at the liquid outlet in the middle section can be driven by the valve linkage rod 306.

[0035] A further technical solution of this utility model is that a support leg 1 is arranged below the workbench 2.

[0036] A further technical solution of this utility model is that the position piston 601 structure includes push sand ports 6014 arranged on both sides, the push sand ports 6014 are turned outward, and the turned outward push sand ports 6014 form an outward turning ring; the push sand ports 6014 arranged on both sides are placed on the piston body 6013; the outer wall of the outward turning ring is in close contact with the wall of the piston inner cavity.

[0037] A further technical solution of this utility model is that the two double-acting cams 304 on the same side of the two sets of three bevel gear systems can make the opposing pistons 601 in the same piston cylinder move in opposite directions at the same time.

[0038] A further technical solution of this utility model is that the valve 610 of the liquid outlet in the middle of the liquid outlet is a conical locking structure, and the conical locking port can open or close the communication channel of the liquid in the middle of the liquid outlet.

[0039] A dual-piston, three-part valve type vibration-free, power-linked opposed pumping method, characterized in that it utilizes the dual-piston, three-part valve type vibration-free, power-linked opposed pump for high-efficiency oilfield extraction as described in any one of the above embodiments, characterized in that...

[0040] It uses a single power source to simultaneously achieve valve control and piston movement; the central piston space 608 and the side piston space 602 work alternately to draw in and output a mixture of oil, water, and sand.

[0041] When the two sets of opposing pistons 601 squeeze towards the middle, the side piston space 602 draws in a mixture of oil, water, and sand. At this time, the middle piston space 608 is squeezed, and the mixture of oil, water, and sand in the middle piston space is squeezed out and transported to the liquid distributor.

[0042] When the two sets of opposing pistons 601 move to both sides, the side piston space 602 outputs a mixture of oil, water and sand to the liquid separator, while the middle piston space 608 draws in the mixture of oil, water and sand.

[0043] A further technical solution of this utility model is that the combined piston chamber pump comprises two pumps, which are arranged in parallel.

[0044] A further technical solution of this utility model is that the two chamber pumps work in conjunction to counteract vibration.

[0045] A further technical solution of this utility model is that the outer wall of the outer flange is in close contact with the inner wall of the piston, which can drive the overall transportation of the mixture of oil, water and sand.

[0046] Option 2:

[0047] A cam system for efficient oilfield extraction that can link valves and pistons is characterized in that the cam system includes a double-acting cam 304, a cam center hole 3045 arranged in the middle of the double-acting cam 304, a valve linkage rod hinge hole 3042 arranged on the side of the double-acting cam 304, and two cam impact protrusions 3043 arranged on the edge of the double-acting cam 304, with an arc-shaped section between the two cam impact protrusions 3043.

[0048] A further technical solution of this utility model is that a cam linkage shaft 3041 is installed in the hole 3042 of the valve linkage rod hinge rod. The cam linkage shaft 3041 is hinged to the piston linkage rod 307. A track slider 310 is fixedly connected to the hinged rod of the piston linkage rod 307. The track slider 310 can move vertically forward along the track. The hinged rod of the piston linkage rod 307 passes through the piston cover 308. A positioning piston 601 is arranged at the end of the hinged rod of the piston linkage rod 307.

[0049] A further technical solution of this utility model is that a structure for mounting a lever assembly 305 is arranged on the mounting seat of the shaft for mounting the double-acting cam 304, and a rod is arranged between the structures for mounting the lever assembly 305.

[0050] The impact arm 3051 and the arc-shaped linkage arm 3052 have a hole at the joint position for a rod for rotation to pass through; the impact arm 3051 and the arc-shaped linkage arm 3052 constitute the lever assembly 305;

[0051] The arc-shaped linkage arm 3052 includes a valve linkage rod hinge position 3053, and the bottom of the impact arm 3051 is equipped with a rolling structure to contact the edge of the double-acting cam 304.

[0052] A further technical solution of this utility model is that the valve linkage rod is hinged at the hinge position 3053 to the valve linkage rod 306, and the end of the valve linkage rod 306 passes through the valve cover and is connected to the valve 610 of the liquid outlet in the middle of the liquid outlet. The valve linkage rod 306 can control the opening and closing of the liquid outlet 611 in the middle of the liquid outlet by pushing and pulling it in.

[0053] A further technical solution of this utility model is that the valve linkage rod 306 and the track slider 310 are arranged in parallel on the track.

[0054] A further technical solution of this utility model is that, during the rotation of the double-acting cam 304, it can drive the valve linkage rod 306 and the piston linkage rod 307 to reciprocate.

[0055] A further technical solution of this utility model is that the track slider 310 can ensure that the piston linkage rod 307 is pulled linearly, thereby causing the piston 601 at the correct position to rub excessively against the inner wall of the cylinder.

[0056] A further technical solution of this utility model is that the valve 610 of the liquid outlet in the middle of the liquid outlet is a conical locking structure, and the conical locking port can open or close the communication channel of the liquid in the middle of the liquid outlet.

[0057] A linkage method for a cam system that can link valves and pistons in efficient oilfield extraction is characterized in that, using any of the above-mentioned cam systems that can link valves and pistons in efficient oilfield extraction, during the rotation of the double-acting cam 304, it can simultaneously drive the movement of the position piston 601 and the opening and closing of the valve 610 at the liquid outlet in the middle of the liquid outlet.

[0058] Option 3:

[0059] A combined piston chamber pump is characterized in that the piston chamber pump includes a piston chamber, and piston rods 603 extend into both sides of the piston chamber. Opposing pistons 601 are arranged at the ends of the piston rods 603. The space between the two sets of opposing pistons 601 is a central piston space 608, and the space between each of the two sets of opposing pistons 601 and the piston chamber is a side piston space 602.

[0060] The central piston space 608 is provided with a liquid outlet 609 and a liquid inlet pipe 404.

[0061] The side piston space 602 is provided with two side distribution ports 4032 and two side liquid outlet pipes 607;

[0062] The valve 610 at the liquid outlet in the middle section can be driven by the valve linkage rod 306.

[0063] A further technical solution of this utility model is that the two side distribution ports 4032 corresponding to the same piston chamber are connected together by a main distribution structure 4031. The two side distribution ports 4032 and the main distribution structure 4031 are integrally formed as liquid inlet pipes 403 on both sides of the liquid inlet. The liquid inlet pipes 403 on both sides of the liquid inlet merge into the liquid distributor; the liquid inlet pipe 404 in the middle of the liquid inlet also merges into the liquid distributor.

[0064] A further technical solution of this utility model is that the liquid outlet 609 in the middle of the liquid and the liquid outlet pipes 607 on both sides of the liquid outlet are connected to the liquid distributor, and at this time the liquid distributor is a device for merging liquids.

[0065] A further technical solution of this utility model is that the liquid separator for inlet and the liquid separator for outlet have the same structure, both of which include a base plate. The base plate is provided with a main channel 405 and two sets of separate channels 406. The two sets of separate channels 406 are provided with liquid inlet pipes 403 on both sides and liquid inlet pipe 404 in the middle. The separate channels of the liquid separator for outlet are used to collect liquid.

[0066] A further technical solution of this utility model is that the liquid separator is connected to the liquid inlet 4.

[0067] A further technical solution of this utility model is that the liquid separator structure is connected to the liquid outlet 5.

[0068] Option 4:

[0069] A piston-linkage structure that prevents leakage in the piston chamber is characterized in that a track slider 310 is fixedly connected to the hinged rod of the piston linkage connecting rod 307, the track slider 310 can move vertically forward along the track, the hinged rod of the piston linkage connecting rod 307 passes through the piston cover 308, and a positioning piston 601 is arranged at the end of the hinged rod of the piston linkage connecting rod 307.

[0070] A further technical solution of this utility model is that the valve linkage rod 306 and the track slider 310 are arranged in parallel on the track; during the rotation of the double-acting cam 304, it can drive the valve linkage rod 306 and the piston linkage rod 307 to reciprocate.

[0071] A further technical solution of this utility model is that the track slider 310 can ensure that the piston linkage rod 307 is pulled linearly, thereby causing the piston 601 at the correct position to rub excessively against the inner wall of the cylinder.

[0072] A further technical solution of this utility model is that the position piston 601 structure includes push sand ports 6014 arranged on both sides, the push sand ports 6014 are turned outward, and the turned outward push sand ports 6014 form an outward turning ring.

[0073] A further technical solution of this utility model is that the sand-pushing ports 6014 arranged on both sides are placed on the piston body 6013.

[0074] A further technical solution of this utility model is that the outer wall of the outer flange is in close contact with the wall of the piston inner cavity.

[0075] A further technical solution of this utility model is that the two distribution ports 4032 corresponding to the same piston chamber are connected together by a main distribution structure 4031. The two distribution ports 4032 and the main distribution structure 4031 are integrally formed as liquid inlet pipes 403 on both sides, which converge into the liquid distributor. The liquid inlet pipe 404 in the middle also converges into the liquid distributor. The liquid outlet 609 in the middle and the liquid outlet pipes 607 on both sides are connected to the liquid distributor. At this time, the liquid separator is a device for collecting liquids; the liquid separator for inlet and liquid separator for outlet have the same structure, both of which include a base plate, on which a main channel 405 and two sets of separate channels 406 are arranged, and liquid inlet pipes 403 on both sides and liquid inlet pipe 404 in the middle of the two sets of separate channels 406 are arranged; the separate channels of the liquid separator for outlet are used to collect liquid; the liquid separator for inlet is connected to the liquid inlet 4; the liquid separator for outlet is connected to the liquid outlet 5.

[0076] Option 5:

[0077] The opposed pump linkage power structure is characterized in that the linkage power structure is an opposed bevel gear system, the opposed bevel gear system includes a power shaft 301, and a three bevel gear system is arranged on the power shaft;

[0078] Each three-bevel gear system includes a driving bevel gear 302 and two symmetrically arranged horizontal bevel gears 303; the three bevel gears mesh with each other and are subjected to balanced forces, thus preventing excessive vibration.

[0079] The power shaft 301 is connected to the motor 3.

[0080] A further technical solution of this utility model is that the linkage power structure is an opposing bevel gear system, and two sets of three bevel gear systems are arranged on the power shaft.

[0081] A further technical solution of this utility model is that the two sets of three bevel gear systems are respectively arranged on both sides of the power shaft 301, and the bevel gear systems on both sides are arranged symmetrically.

[0082] A further technical solution of this utility model is that a double-acting cam 304 is coaxially mounted on the horizontal bevel gear 303.

[0083] A further technical solution of this utility model is that the four horizontal bevel gears 303 correspond to the four double-acting cams 304.

[0084] A further technical solution of this utility model is that the two double-acting cams 304 on the same side of the two sets of three bevel gear systems can make the opposing pistons 601 in the same piston cylinder move in opposite directions at the same time.

[0085] The present invention, employing the above technical solution, offers the following advantages over existing technologies: The opposed pump provides a "stability solution" for transporting complex media in oilfields. Its symmetrical structure counteracts vibration, extending equipment lifespan to near the seasonal maintenance cycle. Reduced vibration and extended seal life make it suitable for oil wells with high sand content and high corrosion. Less wear; compared to piston pumps and screw pumps in beam pumping units, the opposed pump offers superior adaptability to complex media and longer lifespan, although its cost is higher than conventional eccentric rotary pumps. Through the precise synchronous reverse movement of the opposed piston / rotor, the inherent unilateral vibration problem of traditional eccentric rotary pumps, such as single screw pumps, can be effectively eliminated or significantly reduced, thereby greatly improving the stability and reliability of equipment operation and extending the lifespan of key components. Furthermore, it ensures that the pump chamber does not wear and prevents sand and soil accumulation. Attached Figure Description

[0086] To further illustrate this utility model, the following description is provided in conjunction with the accompanying drawings:

[0087] Figure 1 This is a three-dimensional structural diagram of the utility model from a lower perspective;

[0088] Figure 2 This is a three-dimensional structural diagram of the utility model from a top view.

[0089] Figure 3 This is a partial structural schematic diagram of the utility model;

[0090] Figure 4 and Figure 5 This is a partial structural schematic diagram of the utility model;

[0091] Figure 6 This is a schematic diagram of the core pump.

[0092] Figure 7 This is a schematic diagram of the internal structure of the core pump;

[0093] Figure 8 A three-dimensional sectional view of a portion of the core pump.

[0094] Figure 9 This is a structural diagram of the liquid inlet and liquid separation structure;

[0095] Figure 10 A structural diagram showing the liquid inlet and separator structure without the panel;

[0096] Figure 11 This is a partial structural diagram of the power linkage part;

[0097] Figure 12 This is a structural diagram of the lever assembly;

[0098] Figure 13 This is a structural diagram of a double-acting cam;

[0099] Figure 14 This is a structural diagram of the position piston;

[0100] Figure 15 This is a structural diagram of the position piston with some components removed.

[0101] Figure 16 This is a cross-sectional view of the piston in position;

[0102] Figure 17 This is a partial structural diagram of the utility model;

[0103] Figure 18 A drawing for further improvements to the invention;

[0104] Figure 19 Structural diagram for installing auxiliary structures;

[0105] The components include: 1. support legs; 2. worktable; 3. motor; 4. liquid inlet; 5. liquid outlet;

[0106] 301. Drive shaft; 302. Drive shaft gear; 303. Horizontal bevel gear; 304. Double-acting cam; 305. Lever assembly; 306. Valve linkage rod; 307. Piston linkage rod; 308. Piston cover; 309. Valve linkage inlet; 310. Track slider;

[0107] 3041. Cam linkage shaft; 3042. Hole of valve linkage rod hinge rod; 3043. Cam impact protrusion; 3045. Cam center hole; 3055. Bottom impact part; 3051. Impact arm; 3052. Arc-shaped linkage arm; 3053. Hinged position of valve linkage rod; 3054. Impact wheel;

[0108] 401. Main mixing pipe for liquid inlet; 402. Liquid inlet diversion device; 403. Liquid inlet pipes on both sides of the liquid inlet; 404. Liquid inlet pipe in the middle of the liquid inlet; 4031. Main distribution structure; 4032. Distribution ports on both sides; 405. Main channel; 406. Split channel;

[0109] 501. Main mixing pipe for liquid discharge; 502. Liquid mixing device for liquid discharge; 503. Liquid discharge pipes on both sides of the outlet; 504. Liquid discharge pipe in the middle of the outlet;

[0110] 601. Position piston; 602. Side piston space; 603. Piston rod; 607. Liquid outlet pipes on both sides; 608. Middle piston space; 609. Liquid outlet in the middle; 610. Valve at the liquid outlet in the middle; 611. Liquid outlet in the middle.

[0111] 6011. Outward-flaring ring in the central space; 6012. Outward-flaring ring in the side space; 6013. Piston body; 6014. Push sand inlet;

[0112] 701. Installation auxiliary structure; 702. Spring mounting hole; 703. Imported auxiliary spring; 704. Imported plug body; 705. Imported plug cone; 706. Outlet spring; 707. Outlet plug cone. Detailed Implementation

[0113] 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.

[0114] 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.

[0115] 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.

[0116] For ease of understanding, the embodiments are presented by first introducing some parts and then connecting them to the overall technology.

[0117] Example 1: A combined piston chamber pump, characterized in that the piston chamber pump includes a piston chamber, piston rods 603 extending into both sides of the piston chamber, and opposing pistons 601 arranged at the ends of the piston rods 603; the space between the two sets of opposing pistons 601 is the central piston space 608, and the space between each of the two sets of opposing pistons 601 and the piston chamber is the side piston space 602.

[0118] The central piston space 608 is provided with a liquid outlet 609 and a liquid inlet pipe 404.

[0119] The side piston space 602 is provided with two side distribution ports 4032 and two side liquid outlet pipes 607;

[0120] The valve 610 at the liquid outlet in the middle section can be driven by the valve linkage rod 306 to achieve linkage.

[0121] The central passage is equipped with a port airtight valve at both the inlet and outlet. The port airtight valve includes a plug body, which is integrated with a plug cone. The plug body is a cylindrical structure, and a spring is fitted on the outside of the cylindrical structure.

[0122] The more specific arrangements are as follows:

[0123] An installation auxiliary structure 701 is provided outside the outlet of the central channel. The installation auxiliary structure 701 is a plate-shaped structure fixed on the machine body. A recessed spring mounting hole 702 is arranged on the plate-shaped structure. An outlet auxiliary spring 703 is arranged in the spring mounting hole 702. The outlet auxiliary spring 703 is sleeved on the outlet plug body 704. The outlet plug body 704 is integrally provided with an outlet plug cone 705. The conical surface of the plug cone 705 can squeeze out the inlet of the central channel of liquid.

[0124] The entrance of the central passage is equipped with an inlet plug cone 707, and an inlet spring 706 is arranged below the inlet plug cone 707. The inlet spring 706 can press against the machine body structure.

[0125] The outlet plug cone 705 normally compresses against the outlet channel opening to provide an airtight seal, and will only open when there is outward pressure at the outlet;

[0126] The imported plug cone 707 is normally compressed on the inlet channel to provide an airtight seal, and will only open when there is inward pressure at the inlet.

[0127] The substantive technical effects and implementation process of the technical solution presented herein, i.e., its basic functions, are as follows: [Combined with...] Figure 5 , Figure 6 , Figure 7 , Figure 8The space between the two sets of opposing pistons 601 is the central piston space 608, and the space between each of the two sets of opposing pistons 601 and the piston cavity is the side piston space 602. This forms a complex three-cavity structure. This structure, in conjunction with the pipeline and the valve above, can be linked. Compared with the shortcomings of the prior art, which "requires a complex valve control system or has no valve control system", this patent can innovatively utilize the cooperation between the cavity and the pipeline, as well as the cooperation of the external valve, to provide a new cavity combination structure.

[0128] The 705 plug cone for export and the 707 plug cone for import improve overall airtightness.

[0129] Example 2: As a further possible improvement, parallel solution, or optional independent solution, the two side distribution ports 4032 corresponding to the same piston chamber are connected together by a main distribution structure 4031. The two side distribution ports 4032 and the main distribution structure 4031 together constitute the liquid inlet pipes 403 on both sides, which converge into the liquid distributor; the liquid inlet pipe 404 in the middle also converges into the liquid distributor. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 5 and Figure 10 This solution provides a complex, symmetrically arranged piping system that effectively provides pipeline support for material transport.

[0130] Example 3: As a further improvement, parallel, or optional independent solution, the liquid outlet 609 in the middle of the liquid and the liquid outlet pipes 607 on both sides of the liquid outlet are connected to a liquid separator. In this case, the liquid separator is a device for merging liquids. The substantial technical effect and implementation process of the technical solution described here, i.e., its basic function, are as follows: [Combined with...] Figure 10 The device provides a specific structure capable of liquid delivery and diversion. Furthermore, this design avoids single-path pipeline blockages that could damage the pump; its symmetrical overall structure effectively counteracts unbalanced vibrations, minimizing them.

[0131] Example 4: As a further improvement, parallel, or optional independent solution, the liquid inlet separator and the liquid outlet separator have the same structure, both including a base plate. The base plate has a main channel 405 and two sets of separate channels 406. The two sets of separate channels 406 are equipped with liquid inlet pipes 403 on both sides and a liquid inlet pipe 404 in the middle. The separate channels of the liquid outlet separator are used to collect liquid. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 10 and Figure 9This scheme enables fluid distribution and merging, resulting in greater overall integrity. The overall structure is achieved using suction force.

[0132] Example 5: As a further improvement, parallel, or optional independent solution, the liquid separator is connected to the liquid inlet 4. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 1 It provides the overall entry path for the mixed fluid.

[0133] Example 6: As a further improvement, parallel, or optional independent solution, the liquid distributor structure is connected to the liquid outlet 5. The substantive technical effect and its implementation process, i.e., the basic function, of this technical solution are as follows: [Combined with...] Figure 1 It provides a collection path for the entire mixed fluid.

[0134] Example 7: As a further possible improvement, parallel solution, or optional independent solution, a connecting rod-piston linkage structure free from piston cavity leakage is characterized in that a track slider 310 is fixedly connected to the hinged rod of the piston linkage connecting rod 307, the track slider 310 can move vertically forward along the track, the hinged rod of the piston linkage connecting rod 307 passes through the piston cover 308, and a positioning piston 601 is arranged at the end of the hinged rod of the piston linkage connecting rod 307. The substantial technical effect and its implementation process, i.e., the basic function, of this technical solution are as follows: [Combined with...] Figure 5 The slider in this design essentially solves a major problem: the piston driven by the cam and linkage system is subjected to uneven force, which can easily cause compression of the piston cavity and piston, leading to leakage and damage. The track can provide guidance and distribute the force more evenly.

[0135] Example 8: As a further improvement, parallel, or optional independent solution, the valve linkage rod 306 and the track slider 310 are mounted on parallel tracks; during the rotation of the double-acting cam 304, it can drive the valve linkage rod 306 and the piston linkage rod 307 to reciprocate. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 5 It can achieve piston movement.

[0136] Example 9: As a further improvement, parallel, or optional independent solution, the track slider 310 can ensure that the piston linkage rod 307 is pulled linearly, thereby causing the piston 601 to rub excessively against the inner wall of the cylinder.

[0137] Example 10: As a further improvement, parallel, or optional independent solution, the position piston 601 structure includes push-sand ports 6014 arranged on both sides, the push-sand ports 6014 being outwardly turned, forming an outwardly turned ring. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 15 and Figure 16 The outer wall of the outer flange is in close contact with the inner wall of the piston, which can drive the mixed fluid to move. It will not allow solid objects such as sand to stick to the wall, causing blockage and wear, and thus enter the piston and affect the seal and life.

[0138] Example 11: As a further improvement, parallel, or optional independent solution, the pusher ports 6014 arranged on both sides are placed on the piston body 6013. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 15 and Figure 16 This resulted in the implementation of a specific sand-pushing structure layout.

[0139] Example 12: As a further improvement, parallel, or optional independent solution, the outer wall of the outer flange is in close contact with the wall of the piston cavity.

[0140] Example 13: As a further improvement, parallel, or optional independent solution, the two distribution ports 4032 corresponding to the same piston chamber are connected together by a main distribution structure 4031. The two distribution ports 4032 and the main distribution structure 4031 are integrally formed as liquid inlet pipes 403 on both sides, which converge into the liquid distributor; the liquid inlet pipe 404 in the middle also converges into the liquid distributor; the liquid outlet 609 in the middle and the liquid outlet pipes 607 on both sides are connected... The liquid separator has both inlet and outlet sections, with the outlet section acting as a liquid collection device. The inlet and outlet sections have the same structure, both including a base plate. The base plate has a main channel 405 and two sets of separate channels 406. The two sets of separate channels 406 have inlet pipes 403 on both sides and an inlet pipe 404 in the middle. The outlet section's separate channels are used to collect the liquid. The inlet section is connected to the inlet port 4, and the outlet section is connected to the outlet port 5. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: it provides specific fluid conduits.

[0141] Example 14: As a further possible improvement, parallel solution, or optional independent solution, the opposed pump linkage power structure is characterized in that the linkage power structure is an opposed bevel gear system, the opposed bevel gear system includes a power shaft 301, and a three bevel gear system is arranged on the power shaft.

[0142] Each three-bevel gear system includes a driving bevel gear 302 and two symmetrically arranged horizontal bevel gears 303; the three bevel gears mesh with each other and are subjected to balanced forces, thus preventing excessive vibration.

[0143] The power shaft 301 is connected to the motor 3. The substantive technical effect and its implementation process, i.e., the basic function, of the technical solution described here are as follows: [Combined with...] Figure 2 , Figure 3 , Figure 4 and Figure 11 One power source enables the synchronized movement of four pistons, resulting in better performance and greater energy efficiency.

[0144] Example 15: As a further improvement, parallel, or optional independent solution, the linkage power structure is a opposed bevel gear system, with two sets of three bevel gear systems arranged on the power shaft. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 2 , Figure 3 , Figure 4 and Figure 11 It provides a specific alignment gear arrangement structure, with zero counteracting force.

[0145] Example 16: As a further improvement, parallel, or optional independent solution, two sets of three bevel gear systems are arranged on both sides of the power shaft 301, with the bevel gear systems on both sides arranged symmetrically.

[0146] Example 17: As a further improvement, parallel, or optional independent solution, a double-acting cam 304 is coaxially mounted on the horizontal bevel gear 303. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 2 , Figure 4 and Figure 11 It can achieve unified logical linkage between valves and pistons.

[0147] Example 18: As a further improvement, parallel, or alternative independent solution, four horizontal bevel gears 303 correspond to four double-acting cams 304.

[0148] Example 19: As a further improvement, parallel solution, or optional independent solution, the two double-acting cams 304 on the same side of the two sets of three bevel gear systems can make the opposing pistons 601 in the same piston cylinder move in opposite directions simultaneously.

[0149] A high-efficiency oilfield extraction dual-piston three-part valve vibration-free power linkage opposed pump, characterized in that the opposed pump is arranged on the workbench 2;

[0150] The workbench 2 is equipped with a counter-pump linkage power structure, characterized in that the linkage power structure is a counter-pump bevel gear system, the counter-pump bevel gear system includes a power shaft 301, and a three-bevel gear system is arranged on the power shaft;

[0151] Each three-bevel gear system includes a driving bevel gear 302 and two symmetrically arranged horizontal bevel gears 303; the three bevel gears mesh with each other and are subjected to balanced forces, thus preventing excessive vibration.

[0152] The power shaft 301 is connected to the motor 3. The linkage power structure is a opposed bevel gear system. Two sets of three bevel gear systems are arranged on the power shaft. The two sets of three bevel gear systems are arranged on both sides of the power shaft 301, and the bevel gear systems on both sides are symmetrically arranged.

[0153] A double-acting cam 304 is coaxially mounted on a horizontal bevel gear 303; four horizontal bevel gears 303 correspond to four double-acting cams 304; in the two sets of three bevel gear systems, two double-acting cams 304 on the same side can make the opposite pistons 601 in the same piston cylinder move in opposite directions simultaneously.

[0154] The mounting base for mounting the shaft of the double-acting cam 304 is provided with a structure for mounting the lever assembly 305, and a rod is arranged between the structures for mounting the lever assembly 305.

[0155] The double-acting cam 304 is part of a cam system for efficient oilfield extraction that can link valves and pistons. This cam system includes a double-acting cam 304, a cam center hole 3045 arranged in the middle of the double-acting cam 304, a valve linkage rod hinge rod hole 3042 arranged on the side of the double-acting cam 304, and two cam impact protrusions 3043 arranged on the edge of the double-acting cam 304, with an arc-shaped section between the two cam impact protrusions 3043; a cam linkage shaft 3041 is installed in the valve linkage rod hinge rod hole 3042, and the cam linkage shaft 3041 is hinged to the piston linkage rod 307. A track slider 310 is fixedly connected to the hinged rod of the piston linkage rod 307, and the track slider 310 can move vertically forward along the track. The hinged rod of the piston linkage rod 307 passes through the piston cover 308, and a positioning piston 601 is arranged at the end of the hinged rod of the piston linkage rod 307.

[0156] The impact arm 3051 and the arc-shaped linkage arm 3052 have a hole at the joint position for a rod for rotation to pass through; the impact arm 3051 and the arc-shaped linkage arm 3052 constitute the lever assembly 305;

[0157] The arc-shaped linkage arm 3052 includes a valve linkage rod hinge position 3053. The bottom of the impact arm 3051 is equipped with a rolling structure to contact the edge of the double-acting cam 304. The valve linkage rod hinge position 3053 is hinged to the valve linkage rod 306. The end of the valve linkage rod 306 passes through the valve cover and is connected to the valve 610 of the liquid outlet in the middle of the liquid outlet. The pushing and pulling of the valve linkage rod 306 can control the opening and closing of the liquid outlet 611 in the middle of the liquid outlet.

[0158] The combined piston chamber pump includes a piston chamber with piston rods 603 extending into both sides of the piston chamber. The piston rods 603 are equipped with opposing pistons 601 at their ends. The space between the two sets of opposing pistons 601 is the central piston space 608, and the space between each of the two sets of opposing pistons 601 and the piston chamber is the side piston space 602.

[0159] The central piston space 608 is provided with a liquid outlet 609 and a liquid inlet pipe 404.

[0160] The side piston space 602 is provided with two side distribution ports 4032 and two side liquid outlet pipes 607;

[0161] The valve 610 at the liquid outlet in the middle section can be actuated by the valve linkage rod 306. The substantive technical effect and its implementation process, i.e., the basic function, of this technical solution are as follows: (Refer to all attached figures)

[0162] A dual-piston, three-part valve type vibration-free, power-linked opposed pumping method, characterized in that it utilizes the dual-piston, three-part valve type vibration-free, power-linked opposed pump for high-efficiency oilfield extraction as described in any one of the above embodiments, characterized in that...

[0163] It uses a single power source to simultaneously achieve valve control and piston movement; the central piston space 608 and the side piston space 602 work alternately to draw in and output a mixture of oil, water, and sand.

[0164] When the two sets of opposing pistons 601 squeeze towards the middle, the side piston space 602 draws in a mixture of oil, water, and sand. At this time, the middle piston space 608 is squeezed, and the mixture of oil, water, and sand in the middle piston space is squeezed out and transported to the liquid distributor.

[0165] When the two sets of opposing pistons 601 move to both sides, the side piston space 602 outputs a mixture of oil, water and sand to the liquid separator, while the middle piston space 608 draws in the mixture of oil, water and sand.

[0166] Opposed pumps offer a "stability solution" for transporting complex media in oilfields. Their symmetrical structure counteracts vibration, extending equipment lifespan to near the seasonal maintenance cycle. Reduced vibration and extended seal life make them suitable for oil wells with high sand content and high corrosion. With less wear, opposed pumps offer superior adaptability to complex media and longer lifespan compared to piston and screw pumps in beam pumping units. The precise, synchronized, reverse motion of the opposed piston / rotor effectively eliminates or significantly reduces the inherent unilateral vibration problem of traditional eccentric rotary pumps such as single-screw pumps, thereby greatly improving the stability and reliability of equipment operation and extending the lifespan of critical components.

[0167] Example 21: As a further improvement, parallel, or optional independent solution, a support leg 1 is arranged below the workbench 2. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 1 This facilitates overall support.

[0168] Example 22: As a further possible improvement, parallel solution, or optional independent solution, the position piston 601 structure includes push sand ports 6014 arranged on both sides, the push sand ports 6014 are turned outward, and the turned outward push sand ports 6014 form an outward turning ring; the push sand ports 6014 arranged on both sides are placed on the piston body 6013; the outer wall of the outward turning ring is in close contact with the wall of the piston inner cavity.

[0169] In the two sets of three-bevel gear systems, two double-acting cams 304 on the same side enable the opposing pistons 601 in the same piston cylinder to move in opposite directions simultaneously. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 2 , Figure 13 and Figure 12 This cam structure simultaneously drives both the valve and the piston. The piston is hinged and linked, while the valve is regularly stretched by levering. This solves the problem that the same cam cannot achieve dual control in the existing technology.

[0170] Example 24: As a further improvement, parallel, or optional independent solution, the valve 610 at the liquid outlet in the middle of the outlet is a conical locking structure. This conical locking port can open or close the communication channel of the liquid in the middle of the outlet. The substantial technical effect and implementation process of the technical solution here, i.e., its basic function, are as follows: [Combined with...] Figure 8 It provides a specific valve structure that can achieve sealing when needed.

[0171] Example 25: As a further improvement, parallel solution, or optional independent solution, the combined piston chamber pump comprises two pumps arranged in parallel. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: the two chamber pumps work in tandem to counteract vibration. Furthermore, because the pipeline arrangement is relatively symmetrical, even if one branch is temporarily blocked, it will not affect the overall transportation. Due to the continuity of transportation, the pressurized fluid will also generate an impact force, preventing blockages. This achieves efficient and energy-saving transportation in oil fields.

[0172] The outer wall of the outward-facing ring is in close contact with the inner wall of the piston, which can propel the overall transport of a mixture of oil, water, and sand.

[0173] A cam system for efficient oilfield extraction that can link valves and pistons is characterized in that the cam system includes a double-acting cam 304, a cam center hole 3045 arranged in the middle of the double-acting cam 304, a valve linkage rod hinge hole 3042 arranged on the side of the double-acting cam 304, and two cam impact protrusions 3043 arranged on the edge of the double-acting cam 304, with an arc-shaped portion between the two cam impact protrusions 3043. The substantial technical effect and implementation process of the technical solution described herein, i.e., the basic function, are as follows: a linkage method for a cam system for efficient oilfield extraction that can link valves and pistons, characterized in that, using the cam system for efficient oilfield extraction that can link valves and pistons as described above, during the rotation of the double-acting cam 304, it can simultaneously drive the movement of the position piston 601 and the opening and closing of the valve 610 at the liquid outlet in the middle of the liquid outlet.

[0174] Example 27: As a further possible improvement, parallel solution, or optional independent solution, a cam linkage shaft 3041 is installed in the hole 3042 of the valve linkage rod hinge. The cam linkage shaft 3041 is hinged to the piston linkage rod 307. A track slider 310 is fixedly connected to the hinged rod of the piston linkage rod 307. The track slider 310 can move vertically forward along the track. The hinged rod of the piston linkage rod 307 passes through the piston cover 308. A positioning piston 601 is arranged at the end of the hinged rod of the piston linkage rod 307. The substantial technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 7 and Figure 11 It provides a linkage system that interfaces with the cam to facilitate rhythmic power delivery.

[0175] The mounting base for mounting the shaft of the double-acting cam 304 is provided with a structure for mounting the lever assembly 305, and a rod is arranged between the structures for mounting the lever assembly 305.

[0176] The impact arm 3051 and the arc-shaped linkage arm 3052 have a hole at the joint position for a rod for rotation to pass through; the impact arm 3051 and the arc-shaped linkage arm 3052 constitute the lever assembly 305;

[0177] The arc-shaped linkage arm 3052 includes a valve linkage rod hinge position 3053, and the bottom of the impact arm 3051 is equipped with a rolling structure to contact the edge of the double-acting cam 304. The substantive technical effect and implementation process of this technical solution, i.e., its basic function, are as follows: [Combined with...] Figure 11 and Figure 12 It can achieve oscillation and rhythmic local pulling, used for opening and closing valves.

[0178] Example 29: As a further improvement, parallel, or optional independent solution, valve linkage rod hinge position 3053 is hinged to valve linkage rod 306. The end of valve linkage rod 306 passes through valve cover and is connected to valve 610 of liquid outlet in the middle of the liquid outlet. The pushing and pulling of valve linkage rod 306 can control the opening and closing of liquid outlet 611 in the middle of the liquid outlet.

[0179] 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.

[0180] 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 combined piston chamber pump, characterized in that, The piston chamber pump includes a piston chamber, with piston rods (603) extending into both sides of the piston chamber. A counter-position piston (601) is arranged at the end of the piston rod (603). The space between the two sets of counter-position pistons (601) is the central piston space (608), and the space between each of the two sets of counter-position pistons (601) and the piston chamber is the side piston space (602). The central piston space (608) is provided with a liquid outlet (609) in the middle and a liquid inlet pipe (404) in the middle. The side piston space (602) is provided with two side distribution ports (4032) and two side liquid outlet pipes (607). The valve (610) at the liquid outlet in the middle of the liquid outlet can be driven by the valve linkage rod (306) to achieve linkage.

2. The combined piston chamber pump as described in claim 1, characterized in that, The two distribution ports (4032) corresponding to the same piston chamber are connected together by a main distribution structure (4031). The two distribution ports (4032) and the main distribution structure (4031) together form a liquid inlet pipe (403) on both sides of the liquid inlet. The liquid inlet pipe (403) on both sides of the liquid inlet merges into the liquid distributor. The liquid inlet pipe (404) in the middle of the liquid inlet also merges into the liquid distributor.

3. The combined piston chamber pump as described in claim 2, characterized in that, The liquid outlet (609) in the middle of the liquid and the liquid outlet pipes (607) on both sides of the liquid outlet are connected to the liquid separator. At this time, the liquid separator is a device for merging liquids.

4. The combined piston chamber pump as described in claim 3, characterized in that, The liquid separator for inlet and liquid separator for outlet have the same structure, both of which include a base plate. The base plate is provided with a main channel (405) and two sets of separate channels (406). The two sets of separate channels (406) are provided with liquid inlet pipes (403) on both sides and liquid inlet pipe (404) in the middle. The separate channels of the liquid separator for outlet are used to collect liquid.

5. The combined piston chamber pump as described in claim 4, characterized in that, The liquid separator is connected to the liquid inlet (4).

6. The combined piston chamber pump as described in claim 4, characterized in that, The liquid separator structure is connected to the liquid outlet (5).

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