Cam system capable of realizing linkage of valve and piston in efficient exploitation of oil field and linkage method

Abstract

The invention relates to the technical field of oil field efficient exploitation, in particular to a cam system capable of linking a valve and a piston in oil field efficient exploitation and a linkage method. The cam system comprises a double-acting cam (304), a cam center hole (3045) is formed in the middle of the double-acting cam (304), a hole (3042) of a valve linkage rod hinge rod is formed in the side of the double-acting cam (304), two cam impact protrusions (3043) are arranged on the edge of the double-acting cam (304), and an arc-shaped part is arranged between the two cam impact protrusions (3043).

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oilfield efficient production, and particularly relates to a cam system and linkage method capable of linking a valve and a piston for oilfield efficient production. BACKGROUND

[0002] Opposed pump is a special reciprocating or rotary fluid delivery device that uses symmetrical arrangement of double piston / rotor structure to offset mechanical vibration through synchronous reverse motion. This device is mainly applied in the field of oil and gas production, responsible for relaying and delivering complex multiphase mixed media (such as crude oil, associated gas, formation water, silt, etc.) or lifting them from the wellhead to the ground processing facilities. Its unique symmetrical design has significant advantages in balancing inertial force and reducing vibration noise.

[0003] However, this structure also has a series of significant challenges: first, solid particles (such as silt, drill cuttings, metal debris, etc.) contained in the delivery medium are extremely easy to invade and jam in the tiny gap between the precisely matched opposed pistons or rotors, causing excessive wear and even blockage. This jam not only directly leads to a sharp decline in the effective volume efficiency of the pump cavity, affecting the stability and flow accuracy of delivery, but also may exacerbate the wear of dynamic seals and mating surfaces due to the continuous friction of particles, thereby causing seal failure and medium leakage risk. To alleviate this problem, a multi-stage pretreatment filtration system is usually required to be additionally configured in front of the pump to intercept solid impurities, which undoubtedly increases the initial investment cost of the equipment, the burden of regular maintenance and replacement of filter elements, and the complexity of the overall process. Second, although opposed pumps perform well in vibration control, they are essentially high-energy consumption devices (compared to some high-efficiency centrifugal pumps or positive displacement pumps), and their continuous high energy consumption level often makes it difficult to meet the increasingly stringent "energy saving and emission reduction" requirements in the current green oilfield construction, restricting their large-scale application and promotion in scenarios pursuing low-carbon targets.

[0004] At the same time, this structure also has the following significant technical bottlenecks: opposed pumps usually operate in a continuous high-energy consumption state, resulting in high operating costs; the valve control system design is complex and requires high response accuracy, making operation and maintenance difficult; opposed pumps without valve control are prone to pressure leakage and medium backflow due to dynamic pressure fluctuations, seriously affecting delivery efficiency and system reliability; in addition, the pump cavity and key moving parts of the opposed pump have the risk of abnormal wear under high load and solid-containing medium scouring conditions, significantly shortening the service life of the equipment and increasing the probability of unplanned downtime. These factors together limit the application potential of opposed pumps in a wider range of industrial scenarios.

[0005] 2025-08-05, with "opposed pump and bevel gear and wear and valve and linkage and piston" as the abstract keywords, check the allow synonym expansion, search in the China patent database, no relevant literature was found.

[0006] 2025-08-05, with "opposed pump and bevel gear and wear and valve and linkage and piston" in the China National Knowledge Network for abstract search, and no relevant literature was found.

[0007] 2025-08-05, with "opposed pump and bevel gear and wear and valve and linkage and piston" in the United States Patent and Trademark Office website, no relevant literature was found; search website https: / / ppubs.uspto.gov / pubwebapp / .

[0008] 2025-08-05, with "opposed pump and bevel gear and wear and valve and linkage and piston" in WIPO https: / / patentscope2.wipo.int / , no relevant literature was found.

[0009] 2025-08-05, with "opposed pump and bevel gear and wear and valve and linkage and piston" in the Japanese Patent Office website https: / / www.j-platpat.inpit.go.jp / , no relevant literature was found.

[0010] And the idea of this patent is completely different. SUMMARY

[0011] The purpose of the invention: in order to provide the effect of better oil field efficient exploitation of cam system and linkage method of piston valve and piston, the specific purpose see the multiple substantial technical effects of the specific implementation part.

[0012] In order to achieve the above purpose, the present application adopts the following technical scheme: Scheme one: oil field efficient exploitation of double piston three partition valve type vibration free power linkage type opposed pump and conveying method; Option 2: Efficient oil field exploitation can link the cam system and linkage method of the valve and piston. The core is protection: the cam and the lever above the cam, the linkage connecting rod structure below, etc.

[0013] Option 3: A modular piston chamber pump, the core of which is a combination of a single pump housing and an internal piston; Solution 4: A connecting rod-piston linkage structure that eliminates piston chamber leakage. The core is the docking structure of the connecting rod, cam, and piston with track restrictions. Option 5: Opposed pump linkage power structure, the core of which is the power system with comprehensive positioning design of bevel gear design; in: Plan 1, Plan 2, Plan 3, Plan 4, and Plan 5 are closely related as a whole and belong to a closely integrated technical whole, but each of the five plans has its own focus; In order to achieve the above purpose, the present invention adopts the following technical solutions: Option 1: The oilfield efficient exploitation double piston three separation valve type vibration-free power linkage type opposed pump is characterized in that the opposed pump is arranged on a workbench 2; An opposed pump linkage power structure is arranged on the workbench 2, 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; Each three-bevel gear system includes a driving bevel gear 302 and two symmetrically arranged horizontal bevel gears 303; the three bevel gears are meshed with each other and are subjected to balanced forces, thereby preventing excessive vibration.

[0014] The power shaft 301 is connected to the motor 3. The linkage power structure is an 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 respectively. The bevel gear systems on both sides are arranged symmetrically. A double-acting cam 304 is coaxially mounted on the horizontal bevel gear 303; four horizontal bevel gears 303 correspond to four double-acting cams 304; two double-acting cams 304 on the same side of the two sets of three-bevel gear systems can cause the opposite pistons 601 in the same piston cylinder to move in opposite directions simultaneously; A structure for mounting the 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; The double-acting cam 304 is part of a cam system capable of linkage of the valve and piston for efficient oilfield exploitation, the double-acting cam 304 is provided with a cam center hole 3045 in the middle, a valve linkage rod hinged rod hole 3042 is arranged on the side of the double-acting cam 304, two cam impact protrusions 3043 are arranged on the edge of the double-acting cam 304, and an arc-shaped part is arranged between the two cam impact protrusions 3043; the cam linkage shaft 3041 is installed in the valve linkage rod hinged rod hole 3042, the cam linkage shaft 3041 is hinged to the piston linkage connecting rod 307, the piston linkage connecting rod 307 is fixedly connected to the track slider 310 on the hinged rod, the track slider 310 can be pushed forward vertically along the track, the hinged rod of the piston linkage connecting rod 307 passes through the piston cover 308, and the end of the hinged rod of the piston linkage connecting rod 307 is provided with a position piston 601; The position where the impact arm 3051 and the arc surface linkage arm 3052 are connected is provided with a hole for passing through a rod for rotation; the impact arm 3051 and the arc surface linkage arm 3052 constitute a lever assembly 305; The arc surface linkage arm 3052 comprises a valve linkage rod hinged position 3053, and the bottom of the impact arm 3051 is provided with a rolling structure for contacting the edge of the double-acting cam 304; the valve linkage rod hinged 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 middle liquid outlet, and the valve linkage rod 306 can control the opening and closing of the liquid outlet middle liquid outlet 611 by pushing and pulling out; The combined piston cavity pump comprises a piston cavity, and piston rods 603 are arranged on both sides of the piston cavity, and position pistons 601 are arranged at the ends of the piston rods 603; the space between the two groups of position pistons 601 is a middle piston space 608, and the space between each position piston 601 and the piston cavity is a side piston space 602; The middle piston space 608 is provided with a liquid outlet middle liquid outlet 609 and a liquid inlet middle liquid inlet pipe 404; The side piston space 602 is provided with two side distribution ports 4032 and liquid outlet side liquid outlet pipes 607; The valve 610 of the liquid outlet middle liquid outlet can be driven by the valve linkage rod 306.

[0015] Further technical solutions of the present application are that the bracket leg 1 is arranged below the workbench 2.

[0016] The further technical scheme of the present application is that the position piston 601 is provided with sand pushing openings 6014 arranged on both sides and turned outward, and the turned outward sand pushing openings 6014 form a turned outward ring.

[0017] The further technical scheme of the present application is that the two double-acting cams 304 arranged on the same side of the three-bevel gear system can make the position pistons 601 in the same piston cylinder move reversely at the same time.

[0018] The further technical scheme of the present application is that the valve 610 of the liquid outlet in the middle part is a conical locking structure, and the conical locking opening can open or close the communication channel of the liquid outlet in the middle part.

[0019] The double-piston three-separation valve type vibration-free power linkage type opposite conveying method is characterized in that the oil field efficient exploitation double-piston three-separation valve type vibration-free power linkage type opposite pump is used. Single power is used to realize valve control and piston movement at the same time; the middle piston space 608 and the side piston space 602 work alternately to suck and output the mixture of oil, water and sand; When the two groups of position pistons 601 are pressed towards the middle, the side piston space 602 sucks the mixture of oil, water and sand, and the middle piston space 608 is pressed at this time, and the mixture of oil, water and sand in the middle piston space is pressed and delivered to the liquid separator; When the two groups of position pistons 601 move towards both sides, the side piston space 602 outputs the mixture of oil, water and sand to the liquid separator, and the middle piston space 608 sucks the mixture of oil, water and sand at this time.

[0020] The further technical scheme of the present application is that the combined piston cavity pump comprises two, and the two cavity pumps are arranged in parallel.

[0021] The further technical scheme of the present application is that the two cavity pumps work in linkage to offset vibration.

[0022] The further technical scheme of the present application is that the turned outward ring wall closely attached to the wall of the piston inner cavity can push the whole mixture of oil, water and sand.

[0023] Scheme two: The cam system of the oil field efficient exploitation can link the valve and the piston, and has the characteristics that the cam system comprises a double-acting cam 304, a cam center hole 3045 is arranged in the middle of the double-acting cam 304, a valve linkage rod hinged rod hole 3042 is arranged on the side of the double-acting cam 304, two cam impact protrusions 3043 are arranged on the edge of the double-acting cam 304, and an arc portion is arranged between the two cam impact protrusions 3043.

[0024] The further technical scheme of the present application is that the cam linkage shaft 3041 is installed in the valve linkage rod hinged rod hole 3042, the cam linkage shaft 3041 is hinged to the piston linkage connecting rod 307, the rod member hinged to the piston linkage connecting rod 307 is fixedly connected with the track slide 310, the track slide 310 can be pushed forward vertically along the track, the rod member hinged to the piston linkage connecting rod 307 passes through the piston cover 308, and the position piston 601 is arranged at the end of the rod member hinged to the piston linkage connecting rod 307.

[0025] The further technical scheme of the present application is that a structure for installing the lever assembly 305 is arranged on the mounting seat of the shaft for installing the double-acting cam 304, and a rod member is arranged between the structures for installing the lever assembly 305. The position where the impact arm 3051 and the arc linkage arm 3052 are connected has a hole for passing through the rod member for rotation; the impact arm 3051 and the arc linkage arm 3052 constitute the lever assembly 305. The arc linkage arm 3052 comprises a valve linkage rod hinged position 3053, and a rolling structure is arranged at the bottom of the impact arm 3051 to contact the edge of the double-acting cam 304.

[0026] The further technical scheme of the present application is that the valve linkage rod hinged 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 liquid outlet part, and the valve linkage rod 306 can control the opening and closing of the liquid outlet in the liquid outlet part 611.

[0027] The further technical scheme of the present application is that the valve linkage rod 306 and the track slide 310 are arranged in parallel on the track.

[0028] The further technical scheme of the present application is that the double-acting cam 304 can drive the valve linkage rod 306 and the piston linkage connecting rod 307 to reciprocate during rotation.

[0029] The further technical scheme of the present application is that the track slide 310 can ensure that the piston linkage connecting rod 307 is pulled linearly, so that the position piston 601 can pass the inner wall of the cylinder without friction.

[0030] The valve 610 of the middle liquid outlet is a conical locking structure, and the conical locking port can open or close the communication passage of the middle liquid outlet.

[0031] The linkage method of the linkage valve and the piston cam system for efficient oilfield exploitation is characterized in that the linkage valve and the piston cam system for efficient oilfield exploitation are used, and the movement of the position piston 601 and the opening and closing of the valve 610 of the middle liquid outlet are simultaneously driven in the rotation process of the double-acting cam 304.

[0032] Scheme three: The combined piston cavity pump is characterized in that the piston cavity pump comprises a piston cavity, the piston cavity is provided with piston rods 603 at both sides, and the end of the piston rod 603 is provided with a position piston 601; the space between the two groups of position pistons 601 is a middle piston space 608, and the space between each position piston 601 and the piston cavity is a side piston space 602. The middle piston space 608 is provided with a middle liquid outlet 609 and a middle liquid inlet pipe 404; The side piston space 602 is provided with two side distribution ports 4032 and a two-side liquid outlet pipe 607; The valve 610 of the middle liquid outlet can be driven by the valve linkage rod 306.

[0033] The further technical scheme of the present application is that the two side distribution ports 4032 corresponding to the same piston cavity are connected together through a main distribution structure 4031, and the two side distribution ports 4032 and the main distribution structure 4031 are integrally formed into a two-side liquid inlet pipe 403, which is connected to a liquid inlet distributor.

[0034] The further technical scheme of the present application is that the middle liquid outlet 609 and the two-side liquid outlet pipe 607 are connected to a liquid outlet distributor, and the liquid outlet distributor is a liquid converging device.

[0035] The further technical scheme of the present application is that the liquid inlet distributor and the liquid outlet distributor have the same structure, and each comprises a bottom plate, a main groove 405 and two groups of split grooves 406 are arranged on the bottom plate, and the two-side liquid inlet pipe 403 and the middle liquid inlet pipe 404 are arranged on the two groups of split grooves 406; the split grooves of the liquid outlet distributor structure are used for collecting liquid.

[0036] The further technical scheme of the present application is that the liquid inlet distributor is connected to the liquid inlet port 4.

[0037] The further technical scheme of the present application is that the liquid outlet of the liquid distributor structure is connected with the liquid outlet 5.

[0038] Scheme four: The connecting rod and piston linkage structure for preventing leakage of the piston cavity is characterized in that the linkage rod 307 is fixedly connected with the track slider 310 on the hinged rod, the track slider 310 can be pushed vertically forward along the track, the hinged rod of the linkage rod 307 passes through the piston cover 308, and the end of the hinged rod of the linkage rod 307 is arranged with the position piston 601.

[0039] The further technical scheme of the present application is that the track on which the valve linkage rod 306 and the track slider 310 are installed is arranged in parallel; and during rotation of the double-acting cam 304, the valve linkage rod 306 and the linkage rod 307 can be driven to reciprocate.

[0040] The further technical scheme of the present application is that the track slider 310 can ensure that the linkage rod 307 is pulled linearly, so as to prevent the position piston 601 from excessively rubbing the inner wall of the cylinder.

[0041] The further technical scheme of the present application is that the position piston 601 is arranged with the sand pushing opening 6014 arranged on both sides.

[0042] The further technical scheme of the present application is that the sand pushing openings 6014 arranged on both sides are arranged on the piston body 6013.

[0043] The further technical scheme of the present application is that the outer wall of the turned-out circle is tightly attached to the wall of the piston inner cavity.

[0044] The further technical scheme of the present application is that the two side distribution openings 4032 corresponding to the same piston cavity are connected together through a main distribution structure 4031, the two side distribution openings 4032 and the main distribution structure 4031 are integrally formed into the liquid inlet two side liquid inlet pipe 403, the liquid inlet two side liquid inlet pipe 403 is merged into the liquid inlet distributor; the liquid inlet middle liquid inlet pipe 404 is also merged into the liquid inlet distributor; the liquid middle liquid outlet 609 and the liquid outlet two side liquid outlet pipe 607 are connected to the liquid outlet distributor, at this time, the liquid outlet distributor is a liquid converging device; the liquid inlet distributor and the liquid outlet distributor have the same structure, and each comprises a bottom plate, the bottom plate is arranged with a main groove 405 and two groups of split grooves 406, the two groups of split grooves 406 are arranged with the liquid inlet two side liquid inlet pipe 403 and the liquid inlet middle liquid inlet pipe 404; the split grooves of the liquid outlet distributor structure are used for collecting liquid; the liquid inlet distributor is connected with the liquid inlet 4; and the liquid outlet distributor structure is connected with the liquid outlet 5.

[0045] Scheme five: The opposed pump linkage power structure is characterized in that the linkage power structure is an opposed bevel gear system, and the opposed bevel gear system comprises a power shaft 301, and three bevel gear systems are arranged on the power shaft. Each three bevel gear system comprises a driving bevel gear 302 and two symmetrically arranged horizontal bevel gears 303; the three bevel gears are meshed with each other and balanced in stress, and therefore excessive vibration is not generated.

[0046] The power shaft 301 is power-connected with the motor 3.

[0047] The further technical scheme of the present application is that the linkage power structure is an opposed bevel gear system, and two groups of three bevel gear systems are arranged on the power shaft.

[0048] The further technical scheme of the present application is that the two groups of three bevel gear systems are arranged on the two sides of the power shaft 301, and the bevel gear systems on the two sides are symmetrically arranged.

[0049] The further technical scheme of the present application is that the horizontal bevel gear 303 coaxially installs a double-acting cam 304.

[0050] The further technical scheme of the present application is that the four horizontal bevel gears 303 correspond to the four double-acting cams 304.

[0051] The further technical scheme of the present application is that the two double-acting cams 304 on the same side in the two groups of three bevel gear systems can simultaneously move reversely the opposite pistons 601 in the same piston cylinder.

[0052] The present application adopting the above technical scheme has the following beneficial effects relative to the prior art: the opposed pump is a "stability solution" for oilfield complex medium transportation, vibration is offset through a symmetric structure, and the equipment life is prolonged to close to a seasonal inspection period. Vibration is reduced, the service life of a sealing element is improved, and the opposed pump is suitable for high-sand and high-corrosion oil wells. Wear is small, and compared with a piston pump and a screw pump of a beam pumping unit, the opposed pump is more excellent in adaptability to complex medium and service life, but the cost is higher than that of a conventional eccentric rotary pump. Through precise synchronous reverse movement of the opposed pistons / rotors, the single-side vibration problem inherent in a conventional eccentric rotary pump such as a single-screw pump can be effectively eliminated or significantly reduced, so that the smoothness and reliability of equipment operation are greatly improved, and the service life of a key component is prolonged. Moreover, the cavity of the pump is not worn and sand and soil cannot be stored. BRIEF DESCRIPTION OF DRAWINGS

[0053] In order to further illustrate the present application, the following further illustrates the present application in combination with the drawings: Figure 1 It is a perspective view of the present application from a lower perspective; Figure 2 It is a perspective view of the present application from an upper perspective; Figure 3A schematic diagram of the partial structure of the invention; Figure 4 and Figure 5 A schematic diagram of the partial structure of the invention; Figure 6 This is a schematic diagram of the core pump structure; Figure 7 Schematic diagram of the internal structure of the core pump; Figure 8 A perspective cutaway view of a partial cross section of a core pump; Figure 9 It is a structural diagram of the liquid inlet and liquid separation structure; Figure 10 Structural diagram of the liquid inlet and liquid separation structure with the panel removed; Figure 11 It is a schematic diagram of the local structure of the power linkage part; Figure 12 is a structural diagram of the lever assembly; Figure 13 It is the structural diagram of the double-acting cam; Figure 14 It is the structural diagram of the position piston; Figure 15 The figure is a structural diagram of the position piston with some parts removed; Figure 16 is a cross-sectional view of the piston in the opposite position; Figure 17 A partial structural diagram of the invention; Figure 18 A diagram showing further improvements to the invention; Figure 19 Structural drawings for installing auxiliary structures; Wherein: 1. Bracket legs; 2. Workbench; 3. Motor; 4. Liquid inlet; 5. Liquid outlet; 301. Power shaft; 302. Drive shaft gear; 303. Horizontal bevel gear; 304. Double-acting cam; 305. Lever assembly; 306. Valve linkage rod; 307. Piston linkage connecting rod; 308. Piston cover; 309. Valve linkage inlet; 310. Track slider; 3041. Cam linkage shaft; 3042. Hole for the hinged rod of the valve linkage rod; 3043. Cam impact projection; 3045. Cam center hole; 3055. Bottom impact portion; 3051. Impact arm; 3052. Arc-surface linkage arm; 3053. Valve linkage rod hinge position; 3054. Impact wheel; 401. Liquid inlet mixing main pipe; 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; 501. outlet mixing main pipe; 502. outlet mixing device; 503. outlet pipe on both sides; 504. outlet pipe in the middle; 601. position piston; 602. side piston space; 603. piston rod; 607. outlet pipe on both sides; 608. middle piston space; 609. outlet liquid outlet in the middle; 610. valve of outlet liquid outlet in the middle; 611. outlet liquid outlet in the middle; 6011. middle space outer turning ring; 6012. side space outer turning ring; 6013. piston body; 6014. sand pushing opening; 701. installation auxiliary structure; 702. spring installation hole; 703. inlet auxiliary spring; 704. plug body of inlet; 705. plug cone of inlet; 706. outlet spring; 707. plug cone of outlet. DETAILED DESCRIPTION

[0054] The application will be further clarified by the following examples, which should be considered as merely illustrative and not limiting. The specific examples are shown in the drawings as follows:

[0055] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", and the like, merely indicate the orientation or position of the apparatus or element as shown in the drawings, and are used only to facilitate the description of the application and to more simply and concisely describe the application. Therefore, they cannot be understood as indicating or implying that the apparatus or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal connection of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0056] The patent provides multiple parallel schemes, and different expressions belong to improved schemes or parallel schemes based on the basic scheme. Each scheme has its own unique features. In addition, the technical features involved in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other. The fixing mode not expressed in the text can be any one of the fixing modes such as threaded fixing, bolt fixing or glue bonding.

[0057] For easy understanding, the embodiment adopts the way of introducing part of the content first, and then introducing the whole technology in series.

[0058] Embodiment one: The combined piston cavity pump is characterized in that the piston cavity pump comprises a piston cavity, the piston cavity extends into two piston rods 603 on both sides, and the end of the piston rod 603 is arranged with a position piston 601; the space between the two groups of position pistons 601 is the middle piston space 608, and the space between each of the two groups of position pistons 601 and the piston cavity is the side piston space 602; The middle piston space 608 is arranged with a liquid outlet 609 and a liquid inlet pipe 404; The side piston space 602 is arranged with two side distribution ports 4032 and a liquid outlet pipe 607; The valve 610 of the liquid outlet can be driven by the valve linkage rod 306 to link; The inlet and outlet of the middle channel are respectively provided with a port air-tight sealing valve, the port air-tight sealing valve comprises a plug body, the plug body is integrally provided with a plug cone, the plug body is a cylindrical structure, and a spring is sleeved outside the cylindrical structure; More specifically, the arrangement is as follows: The outlet of the middle channel is provided with an installation auxiliary structure 701, the installation auxiliary structure 701 is a plate-shaped structure fixed on the machine body, the plate-shaped structure is arranged with a recessed spring installation hole 702, an outlet auxiliary spring 703 is arranged in the spring installation hole 702, the outlet auxiliary spring 703 is sleeved on the plug body 704 of the outlet, the plug body 704 of the outlet is integrally provided with the plug cone 705 of the outlet, and the conical surface of the plug cone 705 can extrude the inlet of the middle channel of the liquid outlet; The inlet of the middle channel is arranged with an inlet plug cone 707, and the inlet spring 706 is arranged below the inlet plug cone 707, and the inlet spring 706 can be extruded on the machine body structure; The plug cone 705 of the outlet is extruded on the channel port of the outlet to provide air-tight sealing, and only when the outlet has outward pressure can it be opened; The plug cone 707 of the inlet is extruded on the channel port of the inlet to provide air-tight sealing, and only when the inlet has inward pressure can it be opened.

[0059] The essential technical effects and implementation process of the technical solution are as follows: in combination with Figure 5 , Figure 6 , Figure 7 , Figure 8 The space between the two groups of opposing pistons 601 is the middle piston space 608, and the space between each of the two groups of opposing pistons 601 and the piston cavity is the side piston space 602. This forms a complex three-cavity structure. This structure, in combination with the pipeline and the valve above, can be linked, and relative to the defects of the prior art "the need for a complex valve control system or the absence of a valve control system", this patent can create a new cavity combination structure by utilizing the cooperation of the cavity and the pipeline, as well as the cooperation of the external valve. The plug cone 705 of the outlet and the plug cone 707 of the inlet make the overall airtightness better.

[0060] Embodiment two: as a further improved scheme or parallel scheme or alternative independent scheme, the two side distribution ports 4032 corresponding to the same piston cavity are connected together through a main distribution structure 4031, and the two side distribution ports 4032 and the main distribution structure 4031 form an overall liquid inlet two-side liquid inlet pipe 403, which is connected to a liquid inlet distributor; the liquid inlet middle liquid inlet pipe 404 is also connected to the liquid inlet distributor. The essential technical effects and implementation process of the technical solution are as follows: in combination with Figure 5 and Figure 10 , this scheme provides a complex symmetrically arranged pipeline system that can effectively provide pipeline support for material delivery.

[0061] Embodiment three: as a further improved scheme or parallel scheme or alternative independent scheme, the liquid middle liquid outlet 609 and the liquid outlet two-side liquid outlet pipe 607 are connected to a liquid outlet distributor, which is a liquid converging device at this time. The essential technical effects and implementation process of the technical solution are as follows: in combination with Figure 10 , this mechanism provides a specific structure that can achieve liquid delivery and distribution. At the same time, this scheme can avoid single route pipeline blockage, which can cause pump burnout; the overall structure is symmetrically arranged, which can fully balance the unbalanced vibration and reduce the vibration to the minimum.

[0062] Embodiment four: as a further improved scheme or parallel scheme or alternative independent scheme, the liquid inlet distributor and the liquid outlet distributor structure are the same, both of which include a bottom plate, the bottom plate is arranged with a main channel 405 and two groups of split channels 406, and the two groups of split channels 406 are arranged with liquid inlet two-side liquid inlet pipes 403 and liquid inlet middle liquid inlet pipes 404; the split channels of the liquid outlet distributor structure are used to collect liquid. The essential technical effects and implementation process of the technical solution herein are as follows: in combination with Figure 10 and Figure 9 , the scheme can realize fluid distribution and convergence, and has higher integrity. The overall structure is realized by using suction force.

[0063] Embodiment five: as a further improved scheme or parallel scheme or alternative independent scheme, the liquid inlet distributor is connected with a liquid inlet port 4. The essential technical effects and implementation process of the technical solution herein are as follows: in combination with Figure 1 , the entering path of the mixed fluid whole is provided.

[0064] Embodiment six: as a further improved scheme or parallel scheme or alternative independent scheme, the liquid outlet distributor structure is connected with a liquid outlet port 5. The essential technical effects and implementation process of the technical solution herein are as follows: in combination with Figure 1 , the collecting path of the mixed fluid whole is provided.

[0065] Embodiment seven: as a further improved scheme or parallel scheme or alternative independent scheme, the connecting rod piston linkage structure prevents leakage of the piston cavity, characterized in that the piston linkage connecting rod 307 is fixedly connected with a track slider 310 on the articulated rod member, the track slider 310 can be pushed forward vertically along the track, the articulated rod member of the piston linkage connecting rod 307 penetrates through a piston cover 308, and the articulated rod member is arranged with a position piston 601 at the end. The essential technical effects and implementation process of the technical solution herein are as follows: in combination with Figure 5 and the slider, the scheme essentially solves a big problem, that is, the piston driven by the cam and connecting rod system is unevenly stressed, is easily extruded in the piston cavity and the piston, and is easily leaked and damaged, the track can realize guiding and more uniform stress.

[0066] Embodiment eight: as a further improved scheme or parallel scheme or alternative independent scheme, the valve linkage rod 306 and the track slider 310 are installed in parallel tracks; in the rotating process of the double-acting cam 304, the valve linkage rod 306 and the piston linkage connecting rod 307 can be driven to reciprocate. The essential technical effects and implementation process of the technical solution herein are as follows: in combination with Figure 5, the piston movement can be realized.

[0067] In the ninth embodiment, as a further improved scheme or a parallel scheme or an alternative independent scheme, the track slider 310 can ensure the linear pulling of the piston linkage 307, so as to make the position piston 601 step over the friction wall of the cylinder.

[0068] In the tenth embodiment, as a further improved scheme or a parallel scheme or an alternative independent scheme, the position piston 601 is provided with sand pushing openings 6014 arranged on both sides and outwardly turned, and the outwardly turned sand pushing openings 6014 form an outwardly turned ring. The essential technical effects and implementation process of the technical scheme are as follows: in combination with Figure 15 and Figure 16 , the outwardly turned ring wall closely contacts the wall of the piston inner cavity, so as to drive the mixed fluid to push and not to cause the solid such as sand to be stuck to the wall, thereby avoiding the blockage and wear and affecting the sealing and service life of the piston.

[0069] In the eleventh embodiment, as a further improved scheme or a parallel scheme or an alternative independent scheme, the sand pushing openings 6014 arranged on both sides are arranged on the piston body 6013. The essential technical effects and implementation process of the technical scheme are as follows: in combination with Figure 15 and Figure 16 , the specific sand pushing structure arrangement is realized.

[0070] In the twelfth embodiment, as a further improved scheme or a parallel scheme or an alternative independent scheme, the outwardly turned ring wall closely contacts the wall of the piston inner cavity.

[0071] In the thirteenth embodiment, as a further improved scheme or a parallel scheme or an alternative independent scheme, the two side distribution openings 4032 corresponding to the same piston cavity are connected together through a main distribution structure 4031, and the two side distribution openings 4032 and the main distribution structure 4031 integrally form a liquid inlet two side liquid inlet pipe 403, the liquid inlet two side liquid inlet pipe 403 is also connected to a liquid inlet distributor; the liquid inlet middle liquid inlet pipe 404 is also connected to the liquid inlet distributor; the liquid middle liquid outlet 609 and the liquid outlet two side liquid outlet pipe 607 are connected to a liquid outlet distributor, and the liquid outlet distributor is a converging liquid collecting device; the liquid inlet distributor and the liquid outlet distributor have the same structure, and both include a bottom plate, the bottom plate is provided with a main groove 405 and two groups of split grooves 406, and the two groups of split grooves 406 are provided with the liquid inlet two side liquid inlet pipe 403 and the liquid inlet middle liquid inlet pipe 404; the split grooves of the liquid outlet distributor structure are used for collecting liquid; the liquid inlet distributor is connected to the liquid inlet port 4; and the liquid outlet distributor structure is connected to the liquid outlet port 5. The essential technical effects and implementation process of the technical scheme are as follows: the specific fluid pipeline is provided.

[0072] Embodiment fourteen: as a further improvable scheme or parallel scheme or alternative independent scheme, the linkage power structure is a pair of opposed bevel gear systems, and the power shaft 301 is arranged with a three-bevel gear system. Each three-bevel gear system comprises a driving bevel gear 302 and two symmetrically arranged horizontal bevel gears 303; the three bevel gears are meshed with each other and balanced in force, so as to not generate excessive vibration.

[0073] The power shaft 301 is connected with the motor 3. The essential technical effects and implementation process of the technical scheme herein and the basic functions are as follows: in combination with Figure 2 , Figure 3 , Figure 4 and Figure 11 , one power realizes the synchronous movement of four pistons, and the effect is better and more energy-saving.

[0074] Embodiment fifteen: as a further improvable scheme or parallel scheme or alternative independent scheme, the linkage power structure is a pair of opposed bevel gear systems, and the power shaft is arranged with two groups of three-bevel gear systems. The essential technical effects and implementation process of the technical scheme herein and the basic functions are as follows: in combination with Figure 2 , Figure 3 , Figure 4 and Figure 11 , a specific counter gear arrangement structure is provided, and the counteracting resultant force is zero.

[0075] Embodiment sixteen: as a further improvable scheme or parallel scheme or alternative independent scheme, the two groups of three-bevel gear systems are arranged on the two sides of the power shaft 301, and the bevel gear systems on the two sides are symmetrically arranged.

[0076] Embodiment seventeen: as a further improvable scheme or parallel scheme or alternative independent scheme, the horizontal bevel gear 303 is coaxially installed with a pair of double-acting cams 304. The essential technical effects and implementation process of the technical scheme herein and the basic functions are as follows: in combination with Figure 2 , Figure 4 and Figure 11 , the unified logical linkage of the valve and the piston can be realized.

[0077] Embodiment eighteen: as a further improvable scheme or parallel scheme or alternative independent scheme, the four horizontal bevel gears 303 correspond to the four double-acting cams 304.

[0078] As a further improvable solution or alternative solution or alternative independent solution, two double-acting cams 304 on the same side of the two sets of bevel gear systems can cause the opposite-position pistons 601 in the same piston cylinder to move simultaneously in opposite directions.

[0079] The oilfield efficient exploitation double-piston three-separation valve type anti-vibration power linkage type opposed pump is characterized in that the opposed pump is arranged on a workbench 2. The workbench 2 is arranged with an opposed-pump linkage power structure, which is an opposed bevel gear system, and the opposed bevel gear system comprises a power shaft 301, and the power shaft is arranged with a three-bevel gear system. Each three-bevel gear system comprises a driving bevel gear 302 and two symmetrically arranged horizontal bevel gears 303; the three bevel gears mesh with each other and are balanced in force, so as not to generate excessive vibration.

[0080] The power shaft 301 is power-connected with a motor 3, and the linkage power structure is an opposed bevel gear system, and the power shaft is arranged with two sets of three-bevel gear systems, which are arranged on the two sides of the power shaft 301, and the bevel gear systems on the two sides are symmetrically arranged. The horizontal bevel gear 303 is coaxially installed with a double-acting cam 304; four horizontal bevel gears 303 correspond to four double-acting cams 304; two double-acting cams 304 on the same side of the two sets of three-bevel gear systems can cause the opposite-position pistons 601 in the same piston cylinder to move simultaneously in opposite directions. A structure for installing a lever assembly 305 is arranged on the mounting seat of the shaft for installing the double-acting cam 304, and a rod member is arranged between the structures for installing the lever assembly 305. The double-acting cam 304 is part of a cam system capable of linking valves and pistons for efficient oilfield exploitation, and the cam system comprises a double-acting cam 304, a cam center hole 3045 is arranged in the middle of the double-acting cam 304, a valve linkage rod hinged rod hole 3042 is arranged on the side of the double-acting cam 304, two cam impact protrusions 3043 are arranged on the edge of the double-acting cam 304, and an arc-shaped part is arranged between the two cam impact protrusions 3043; a cam linkage shaft 3041 is installed in the valve linkage rod hinged rod hole 3042, the cam linkage shaft 3041 is hinged to a piston linkage connecting rod 307, a track sliding block 310 is fixedly connected to the rod member hinged to the piston linkage connecting rod 307, the track sliding block 310 can be pushed vertically forward along the track, the rod member hinged to the piston linkage connecting rod 307 passes through a piston cover 308, and an opposite-position piston 601 is arranged at the end of the rod member hinged to the piston linkage connecting rod 307. The position where the impact arm 3051 and the camber linkage arm 3052 are connected has a hole for a rod for rotation; the impact arm 3051 and the camber linkage arm 3052 form a lever assembly 305; The camber linkage arm 3052 has a valve linkage rod hinged position 3053, the bottom of the impact arm 3051 is provided with a rolling structure for contacting the edge of the double-acting cam 304; the valve linkage rod hinged position 3053 is hinged to the valve linkage rod 306, the end of the valve linkage rod 306 is connected to the valve 610 after passing through the valve cover, and the valve linkage rod 306 pushes and pulls to control the opening and closing of the liquid outlet 611 of the liquid outlet middle part; The combined piston cavity pump comprises a piston cavity, the two sides of the piston cavity extend into a piston rod 603, and the end of the piston rod 603 is provided with a position piston 601; the space between the two groups of position pistons 601 is a middle piston space 608, and the space between each group of position pistons 601 and the piston cavity is a side piston space 602; The middle piston space 608 is provided with a liquid outlet middle part liquid outlet 609 and a liquid inlet middle part liquid inlet pipe 404; The side piston space 602 is provided with two side distribution ports 4032 and a liquid outlet two-side liquid outlet pipe 607; The valve 610 of the liquid outlet middle part liquid outlet can be driven by the valve linkage rod 306 to be linked. The essential technical effects and implementation process of the technical solution herein, i.e., the basic functions, are as follows: The double-piston three-segment valve type shock-free power linkage type opposed conveying method is characterized in that the oil field high-efficiency exploitation double-piston three-segment valve type shock-free power linkage type opposed pump of any one of the above is used, and the double-piston three-segment valve type shock-free power linkage type opposed pump is characterized in that, Single power is used to simultaneously realize valve control and piston movement; the middle piston space 608 and the side piston space 602 work alternately to suck and output a mixture of oil, water and sand; When the two groups of position pistons 601 are pressed towards the middle, the side piston space 602 sucks the mixture of oil, water and sand, at this time the middle piston space 608 is pressed, and the mixture of oil, water and sand in the middle piston space is pressed and conveyed out to the liquid outlet distributor; When the two groups of position pistons 601 move towards the two sides, the side piston space 602 outputs the mixture of oil, water and sand to the liquid outlet distributor, and the middle piston space 608 sucks the mixture of oil, water and sand at this time.

[0081] Opposed pump is the "stability solution" for oilfield complex medium transportation, which offsets vibration through symmetrical structure and prolongs equipment life to nearly seasonal inspection cycle. With reduced vibration and improved seal life, opposed pump is suitable for high sand content and high corrosion oil wells. Compared with beam pumping unit piston pump and screw pump, opposed pump is more superior in complex medium adaptability and life. Through precise synchronous reverse movement of opposed pistons / rotors, it can effectively eliminate or significantly reduce the inherent single-side vibration problem of traditional eccentric rotary pumps such as single-screw pump, thereby greatly improving the stability and reliability of equipment operation and prolonging the life of key components.

[0082] Embodiment twenty-one: as a further improvable scheme or parallel scheme or alternative independent scheme, a support leg 1 is arranged below the workbench 2. The essential technical effect of the technical solution and its implementation process, i.e., the basic function, is as follows: in combination with Figure 1 , the overall support is facilitated.

[0083] Embodiment twenty-two: as a further improvable scheme or parallel scheme or alternative independent scheme, the position piston 601 structure comprises sand pushing openings 6014 arranged towards two sides, the sand pushing openings 6014 are outwardly turned, the outwardly turned sand pushing openings 6014 form an outwardly turned ring; the sand pushing openings 6014 arranged towards two sides are arranged on the piston body 6013; the outer wall of the outwardly turned ring is in close contact with the wall of the piston inner cavity.

[0084] The two double-acting cams 304 on the same side of the two sets of three-bevel gear systems can make the opposite position pistons 601 in the same piston cylinder move reversely at the same time. The essential technical effect of the technical solution and its implementation process, i.e., the basic function, is as follows: in combination with Figure 2 , Figure 13 and Figure 12 , the cam structure simultaneously carries the valve and the piston, and the piston is hinged and linked, and the valve is regularly stretched by lever structure, which solves the problem that the same cam cannot realize double control in the prior art.

[0085] Embodiment twenty-four: as a further improvable scheme or parallel scheme or alternative independent scheme, the valve 610 of the liquid outlet in the liquid outlet middle part is a conical locking structure, which can open or close the communication channel of the liquid outlet middle part. The essential technical effect of the technical solution and its implementation process, i.e., the basic function, is as follows: in combination with Figure 8 , a specific valve structure is provided, which can realize plugging when needed.

[0086] Embodiment twenty-five: as a further improved scheme or parallel scheme or alternative independent scheme, the combined piston cavity pump comprises two two-cavity pumps arranged in parallel. The essential technical effect and its implementation process of the technical solution herein, i.e., the basic function, is as follows: the two-cavity pumps work in linkage, and can offset vibration. And because the pipeline arrangement is relatively symmetrical, even if a branch is temporarily blocked, it will not affect the overall transportation, and because of the continuity of transportation, the pressure fluid will also form an impact force to avoid the blocking situation. Realize the efficient and energy-saving transportation of oilfield.

[0087] The outer wall of the everted ring closely abuts the wall of the piston inner cavity to push the mixture of petroleum, water and sand for overall transportation.

[0088] The cam system for linkage of efficient oilfield exploitation and the piston, characterized in that the cam system comprises a double-acting cam 304, the double-acting cam 304 is arranged with a cam center hole 3045 in the middle, the double-acting cam 304 is arranged with a valve linkage rod hinged rod hole 3042 on the side, and the double-acting cam 304 is arranged with two cam impact protrusions 3043 on the edge, and an arc portion is arranged between the two cam impact protrusions 3043. The essential technical effect and its implementation process of the technical solution herein, i.e., the basic function, is as follows: the linkage method of the cam system for linkage of efficient oilfield exploitation and the piston, characterized in that, by using the cam system for linkage of efficient oilfield exploitation and the piston according to any one of the above, the double-acting cam 304 can drive the movement of the position piston 601 and the opening and closing of the valve 610 of the liquid outlet middle liquid outlet during rotation.

[0089] Embodiment twenty-seven: as a further improved scheme or parallel scheme or alternative independent scheme, the valve linkage rod hinged rod hole 3042 is installed with a cam linkage shaft 3041, the cam linkage shaft 3041 is hinged to a piston linkage connecting rod 307, the rod member hinged to the piston linkage connecting rod 307 is fixedly connected with a track sliding block 310, the track sliding block 310 can be pushed vertically forward along the track, the rod member hinged to the piston linkage connecting rod 307 penetrates through a piston cover 308, and the end of the rod member hinged to the piston linkage connecting rod 307 is arranged with a position piston 601. The essential technical effect and its implementation process of the technical solution herein, i.e., the basic function, is as follows: in combination with Figure 7 and Figure 11 , a connecting rod system for interfacing with the cam is provided to facilitate rhythmic power transmission.

[0090] A mounting seat for mounting the shaft of the double-acting cam 304 is arranged with a structure for mounting a lever assembly 305, and a rod member is arranged between the structures for mounting the lever assembly 305. The position where the impact arm 3051 and the cambered linkage arm 3052 are connected has a hole for a rod for rotation; the impact arm 3051 and the cambered linkage arm 3052 constitute a lever assembly 305; The cambered linkage arm 3052 has a valve linkage rod hinged position 3053, and the bottom of the impact arm 3051 is provided with a rolling structure for contacting the edge of the double-acting cam 304. The essential technical effects and implementation process of the technical solution provided in the present application, i.e., the basic functions, are as follows: Figure 11 And Figure 12 , which can realize swinging and rhythmic local pulling, and is used for opening and closing the valve.

[0091] Embodiment twenty-nine: as a further improvable scheme or a parallel scheme or an alternative independent scheme, the valve linkage rod hinged position 3053 is hinged to a valve linkage rod 306, the end of the valve linkage rod 306 passes through the valve cover and is connected to a valve 610 of the liquid outlet middle liquid outlet, and the valve linkage rod 306 can control the opening and closing of the liquid outlet middle liquid outlet 611.

[0092] It should be noted that the multiple schemes provided by the present patent contain basic schemes, which are independent of each other and do not restrict each other, but they can also be combined with each other without conflict to achieve multiple effects.

[0093] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. The cam system capable of linking valves and pistons for efficient oil field exploitation is characterized by: The cam system comprises a double-acting cam (304), a cam center hole (3045) is arranged in the middle of the double-acting cam (304), a hole (3042) for a valve linkage rod hinge rod is arranged on the side of the double-acting cam (304), two cam impact protrusions (3043) are arranged on the edge of the double-acting cam (304), and an arc portion is formed between the two cam impact protrusions (3043).

2. The cam system capable of linking valves and pistons for efficient oilfield exploitation according to claim 1, characterized in that: A cam linkage shaft (3041) is installed in the hole (3042) of the hinged rod of the valve linkage rod. The cam linkage shaft (3041) is hinged to the piston linkage connecting rod (307). The hinged rod of the piston linkage connecting rod (307) is fixedly connected to the track slider (310). The track slider (310) can be moved vertically forward along the track. The hinged rod of the piston linkage connecting rod (307) passes through the piston cover (308). The end of the hinged rod of the piston linkage connecting rod (307) is provided with a position piston (601).

3. The cam system capable of linking valves and pistons for efficient oilfield exploitation according to claim 1, characterized in that: A structure for mounting a lever assembly (305) is arranged on a mounting seat for mounting a shaft of a double-acting cam (304), and a rod is arranged between the structures for mounting the lever assembly (305); A hole is provided at the position where the impact arm (3051) and the arc surface linkage arm (3052) are connected, for passing a rod for rotation; the impact arm (3051) and the arc surface linkage arm (3052) constitute a lever assembly (305); The arc surface 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 for contacting the edge of the double-action cam (304).

4. The cam system capable of linking valves and pistons for efficient oilfield exploitation according to claim 3, characterized in that: 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 valve linkage rod (306) is pushed forward and pulled out to control the opening and closing of the liquid outlet in the middle of the liquid outlet (611).

5. The cam system capable of linking valves and pistons for efficient oilfield exploitation according to claim 4, characterized in that: The rails on which the valve linkage rod (306) and the rail slider (310) are mounted are arranged in parallel.

6. The cam system capable of linking valves and pistons for efficient oilfield exploitation according to claim 5, characterized in that: During the rotation of the double-acting cam (304), the valve linkage rod (306) and the piston linkage connecting rod (307) can be driven to move back and forth.

7. The cam system capable of linking valves and pistons for efficient oilfield exploitation according to claim 5, characterized in that: The track slider (310) can ensure that the piston linkage connecting rod (307) is pulled linearly, thereby preventing the position piston (601) from excessively rubbing against the inner wall of the cylinder.

8. The cam system capable of linking valves and pistons for efficient oilfield exploitation according to claim 4, characterized in 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.

9. A linkage method for a cam system capable of linking valves and pistons for efficient oil field exploitation, characterized in that: By utilizing the cam system capable of linking valves and pistons for efficient oil field exploitation as described in any one of claims 1 to 7, the double-acting cam (304) 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 during rotation.

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