Intelligent multiphase booster pump device

Abstract

The invention belongs to the technical field of equipment special for petrochemical engineering, and particularly relates to the technical field of oil-gas mixture conveying, in particular to an intelligent multiphase booster pump device which is used for pumping a gaseous medium, a liquid medium or a gas-liquid mixed medium. The booster pump comprises a support, a pump driving device and a pump cylinder component. And the booster pump pre-mixes the pumping medium on the basis of adjusting the power of the motor and / or the acting area difference of the two sides of the inner cavity, so that the pumping medium is not subjected to phase splitting within the preset lift. Piston driving is innovatively adopted to achieve oil-gas mixed transportation, compared with an existing mixed transportation pump, the gas carrying amount is larger, the asymmetric piston pumping mode is adopted, and based on the pressure difference of a left cavity and a right cavity in a cylinder, compression and premixing of pumping media are quite efficiently achieved; under the condition that oil-gas separation equipment and heating equipment are not used, the fact that the piston pump with ultrahigh pumping efficiency is used for conveying the oil-gas mixture is achieved, and the pumping efficiency of the oil-gas mixture is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of petrochemical equipment technology, particularly to the field of oil and gas mixture transportation technology, and specifically to an intelligent multiphase booster pump device. Background Technology

[0002] Traditional oil and gas field pressurization requires multiple equipment for separation and processing, including separators, centrifugal pumps, and compressors connected in series. The process uses gas-liquid separation and transportation, with two pipelines for oil and water and associated gas. In winter, the associated gas pipeline is prone to freezing and blockage. The process involves many pieces of equipment, long process, high energy consumption, large land area, many safety risks, and a large amount of maintenance work.

[0003] In recent years, oil and gas mixed transportation process tests have been carried out on synchronous rotary oil and gas mixed transportation pumps, eccentric rotary swing oil and gas mixed transportation pumps, small oil and gas mixed transportation devices, and plunger-type oil and gas mixed transportation pumps, which have achieved certain results. However, they generally suffer from problems such as small gas carrying capacity, poor stability, and low degree of automation, and cannot meet the needs of field use.

[0004] Oil and gas field development trends: As the development of oil and gas resources becomes increasingly difficult, more complex operating conditions are emerging, such as high gas-liquid ratio fields, heavy oil fields, and marginal oil fields, making it difficult for traditional equipment to meet the demands. Statistics show that high gas-liquid ratio oil and gas fields now account for over 30% of the global total, and this trend is upward, placing higher demands on booster equipment.

[0005] As more and more oil and gas wells produce oil-to-gas ratios that are increasingly similar, most compressors can only deliver natural gas without liquids. Gas containing liquids can cause serious damage to the compressor. Therefore, a high-efficiency multiphase transport unit capable of simultaneously transporting crude oil, water, and natural gas is particularly important. Summary of the Invention In view of this, the present invention provides an intelligent multiphase booster pump device, which can be used as an important equipment for the extraction and transportation of crude oil and natural gas in the field of oil extraction. It does not require the installation of separation buffer devices and heating equipment, and the oil and gas are transported in pipelines without separation. It has high space utilization and accurate flow and pressure.

[0006] To achieve the above-mentioned technical objectives, the technical solution of the present invention is as follows: A smart multiphase booster pump device, characterized in that it is used for pumping gaseous media, liquid media, or gas-liquid mixtures; the booster pump includes: support; A pump drive unit, mounted on the bracket, provides pumping power based on a motor; A pump cylinder assembly includes a cylinder body, a piston, a piston rod, an intake section, and an exhaust section; the cylinder body is mounted on the bracket and includes an internal cavity; the piston is slidably fitted within the internal cavity; the two chambers separated by the piston are each equipped with the intake section and the exhaust section; the piston rod drives the piston to produce linear reciprocating motion based on the pump drive device; Wherein: the motor is a servo motor, which is parallel to the cylinder axis and is connected to the piston rod in a transmission connection; The piston has different working areas on both sides of the internal cavity, and the power of the motor is adjustable; the booster pump premixes the pumping medium based on adjusting the power of the motor and / or the difference in working areas on both sides of the internal cavity, so that the pumping medium does not undergo phase separation within a preset head. The piston rod enters the internal cavity from one end of the cylinder and connects to the piston; the piston has different working areas at its large and small ends.

[0007] Furthermore, in order to reduce the space required for the booster pump of the present invention and improve space utilization, the pump drive device includes a gear transmission device; the output end of the motor is connected to the gear transmission device, the output end of the gear transmission device meshes with the external gear of the transmission nut, and at least a portion of the piston rod is fitted inside the transmission nut; the portion of the piston rod fitted inside the transmission nut is provided with an external thread, and the external thread of the piston rod engages with the internal thread of the transmission nut. Wherein: the transmission nut is rotatably mounted on the bracket; the transmission nut, piston rod and cylinder are all coaxially arranged.

[0008] Furthermore, in order to achieve large suction and large discharge of the medium by the booster pump of the present invention, and to ensure the stability of unidirectional transmission between the suction port and the discharge port, both the suction part and the discharge part are one-way valves, the valve core end face of the one-way valve is spherical, and the valve seat is made of hard alloy.

[0009] Furthermore, in order to enable the present invention to directly deliver unfiltered pumping media, improve the pumping efficiency of particulate matter in the pumping media, and avoid clogging of the booster pump by sand and gravel, the height of the suction section in the horizontal space is greater than that of the discharge section; the inlet of the discharge section is located at the bottom of the internal cavity in the horizontal space.

[0010] Furthermore, in order to further realize the large suction and large discharge of the medium by the booster pump of the present invention, and to further ensure that particulate matter can be effectively discharged, the one-way valve includes a valve seat, a valve core mounting seat and a spring; the valve seat is open at both ends, the valve core mounting seat is coaxially fixed in the central through hole of the valve seat, and at least a part of the valve core is coaxially slidably fitted in the central through hole of the valve core mounting seat; One end of the spring acts on the valve core mounting seat, and the other end acts on the valve core, pushing the end face of the valve core toward the inlet of the valve seat; The large diameter portion of the valve core end face is larger than the inlet of the valve seat, and the one-way valve achieves reverse locking based on its own volume. The inlet and outlet sections of the one-way valve are configured to support the passage of solid impurities with a particle size of no more than 3 mm in the pumping medium.

[0011] Furthermore, in order to improve the service life of the booster pump of the present invention, a self-compensating sealing structure is adopted between the piston and the inner wall of the internal cavity; the sealing structure includes a scraping seal ring and a wear-resistant seal ring fitted on the outer surface of the piston; wherein the number of the scraping seal rings is at least two sets, and the wear-resistant seal rings are disposed between the scraping seal rings.

[0012] Furthermore, in order to improve the sealing performance between the piston rod and the cylinder, a combination structure of a plug ring and a sealing retainer ring is used to seal the piston rod and the cylinder.

[0013] Furthermore, in order to further improve the service life of the booster pump of the present invention, an elastomer is provided in the sealing groove where the scraper seal ring and the wear-resistant seal ring are installed; each of the elastomers provides a preload force to the scraper seal ring and the wear-resistant seal ring in the direction away from the piston circumferential direction.

[0014] Preferably, the material of the scraping seal ring includes PEEK; the material of the wear-resistant seal ring includes graphite-reinforced PTFE.

[0015] To ensure the safety of the booster pump of the present invention, pressure transmitters, temperature transmitters, and safety pressure relief devices are installed on the inlet and outlet pipelines of the booster pump.

[0016] Furthermore, in order to further improve space utilization and pumping flow rate, the booster pump has two sets of cylinders, which are coaxially arranged and fixed on the bracket, and the internal pistons are driven based on the two ends of one set of piston rods. Furthermore, in order to ensure the energy utilization efficiency of the booster pump of the present invention when the upper cylinder block scheme is adopted, the number of motors is two, which are coaxially arranged and fixed on the bracket, and the output ends of both are connected to the gear transmission mechanism.

[0017] By adopting the above technical solution, the present invention can bring the following beneficial effects as a whole: This invention innovatively employs piston drive to achieve oil-gas mixed transportation, which carries a larger gas volume compared to existing mixed transportation pumps. It uses an electric motor as the driving power, resulting in high energy utilization, better stability, and a high degree of automation. Due to the compact overall structure and the use of a servo motor as the power source, this invention challenges the use of an asymmetrical piston pumping method. Based on the pressure difference between the left and right chambers within the cylinder, it achieves highly efficient compression and premixing of the pumped medium. Without the use of oil-gas separation equipment or heating equipment, it makes it possible to transport oil-gas mixtures using a piston pump with extremely high pumping efficiency, greatly improving the pumping efficiency of oil-gas mixtures. The booster pump of this invention can reliably deliver large flow rates of liquid, gas, and gas-liquid mixtures. It can be operated by simply adjusting the working mode of the servo motor, making it suitable for complex mining environments. This invention facilitates the unseparated transport of liquid, oil and gas in pipelines, and the complete recovery of associated gas, thus solving many safety and environmental problems of traditional gathering and transportation processes. This invention can improve the capacity and reliability of oil and gas co-transportation equipment, solve the technical bottleneck of ambient temperature oil and gas co-transportation, and lay the foundation for the creation and promotion of new oil and gas co-transportation modes. This invention can reduce human intervention to achieve unattended operation, thereby reducing risks and overall costs; The booster pump of this invention eliminates the need for descaling and dewaxing devices, reducing wellhead equipment and simplifying the process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of an intelligent multiphase booster pump device according to a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the pump drive device in a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the pump cylinder component in a specific embodiment of the present invention; Figure 4 This is a schematic diagram of a one-way valve structure used in the inhalation section; Figure 5 This is a schematic diagram of a one-way valve structure used in the discharge section; Figure 6 This is a schematic diagram of the piston structure; Figure 7 A schematic diagram of the sealing structure between the piston rod and the cylinder; The components are as follows: 1. Bracket; 2. Pump drive unit; 21. Gear transmission device; 22. Piston rod; 221. Plug ring; 23. Transmission nut; 24. Bearing; 25. Motor; 3. Pump cylinder components; 31. Cylinder body; 311. Internal cavity; 32. Piston; 321. Scraper seal ring; 322. Wear-resistant seal ring; 33. Suction section; 34. Discharge section; 4. Check valve; 41. Valve seat; 42. Valve core mounting seat; 43. Valve core; 44. Spring; 431. Valve core end face. Detailed Implementation

[0020] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0021] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0022] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0023] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this disclosure. The illustrations only show the components related to this disclosure and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0024] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0025] In one embodiment of the present invention, an intelligent multiphase booster pump device is proposed for pumping gaseous media, liquid media, or gas-liquid mixtures; such as Figure 1 As shown, the booster pump includes: Bracket 1; Pump drive unit 2 is mounted on bracket 1 and provides pumping power based on motor 25; The pump cylinder component 3 includes a cylinder body 31, a piston 32, a piston rod 22, a suction section 33, and a discharge section 34. The cylinder body 31 is mounted on a bracket 1 and includes an internal cavity 311. The piston 32 is slidably fitted in the internal cavity 311. The two cavities of the internal cavity 311, separated by the piston 32, are each equipped with a suction section 33 and a discharge section 34. The piston rod 22 drives the piston 32 to produce linear reciprocating motion based on the pump drive device 2. Among them: motor 25 is a servo motor 25, which is axially parallel to cylinder 31 and is connected to piston rod 22 for transmission. The piston 32 has different working areas on both sides of the internal cavity 311, and the power of the motor 25 is adjustable; the booster pump is based on adjusting the power of the motor 25 and / or The difference in working area on both sides of the internal cavity 311 premixes the pumping medium, ensuring that the pumping medium does not separate within the preset head.

[0026] In this embodiment, in order to achieve the difference in working area with minimal cost and thereby improve the premixing of the pumped medium, such as Figure 3 As shown, piston rod 22 enters the internal cavity 311 from one end of cylinder 31 and connects to piston 32. Piston 32 has different working areas at its large and small ends. Because the working areas on both sides of piston 32 are different but the driving force is the same, a pressure difference exists between the media pumped from both sides of cylinder 31, resulting in differences in the gas compression of the oil-gas mixture. When two oil-gas mixtures with a pressure difference meet in a pipeline or other dedicated container, they mix violently (equivalent to molecular diffusion) to achieve a new pressure balance. The mixing degree of the pumped medium is significantly increased. This molecular diffusion-like mixing method is far superior to mixing measures based on structural turbulence. Therefore, this invention can support the pumping of media of various phases without heating (the heating process in existing technologies is also to increase the molecular motion speed).

[0027] The working principle of the booster pump in this embodiment is as follows: driven by the motor 25, the reciprocating motion of the piston 32 changes the volume of the working chamber, and the pressure difference is used to realize the intake and discharge of fluid. During the intake phase: Piston 32 moves, the internal volume of cylinder 31 increases, creating a partial vacuum. The suction valve opens under the action of pressure difference, the discharge valve closes, and external fluid passes through. The intake valve enters the cylinder 31; Compression stage: Piston 32 moves, the internal volume of cylinder 31 decreases, and the intake valve and exhaust valve... When the cylinder is closed, the medium inside cylinder 31 is compressed, and the pressure increases. When the medium pressure exceeds the pipe pressure... When the pressure is reached, the discharge valve opens, and the fluid is discharged.

[0028] In this embodiment, the bracket 1 and all components are installed using a skid-mounted method to reduce the usable area. In this embodiment, the pump drive device 2 is powered by a servo motor 25, which has controllable power, can be reversed, and has a controllable single motion stroke. Its rotation angle is detected by an absolute encoder, which facilitates operator control. This embodiment is equipped with an electrical cabinet, which is connected to multiple sensors, such as pressure transmitters and temperature transmitters installed on the inlet and outlet pipelines of the booster pump, to monitor the working status of the booster pump in this embodiment. The operator can adjust the working mode of the servo motor 25 according to the working status, or analyze the source of abnormality or shut down the booster pump when abnormal data occurs.

[0029] Because the overall structure of this embodiment is compact and adopts coaxial and axially parallel settings, it has a certain degree of vibration resistance.

[0030] In this embodiment, the asymmetric piston 32 pumping method is adopted. The internal cavity 311 of the cylinder 31 is a cylindrical straight cylinder. The working area of ​​one end of the piston 32 is smaller than that of the other end. When the medium is pressurized by the piston 32, there will be a pressure difference between the medium at both ends of the piston 32. Under this structure, the two cavities will pump the medium at the same time. When the medium pumped from the two discharge parts 34 meet, due to the pressure difference between the two, the gas in the medium on the side with higher pressure will expand rapidly, increasing the mixing degree of the pumped medium and increasing the temperature and viscosity of the medium.

[0031] Existing equipment uses plunger pumps and other methods to pump gas-liquid mixtures (such as mixtures of oil and natural gas). Although the pressure can meet the requirements, the pumping flow rate is lower than that of the piston 32 pump. Although the traditional piston 32 pump has a high pumping flow rate, it cannot achieve the required mixing degree and viscosity of the gas-liquid mixture to meet the head requirements when pumping gas-liquid mixed media. Therefore, it is necessary to use a gas-liquid separation device and then use different booster pumps to transport the two separately.

[0032] Due to the special structure of the pump cylinder assembly in this embodiment, it will have a certain degree of vibration during operation (when two groups of media with a pressure difference meet). Therefore, this embodiment improves the vibration resistance of the overall structure and ensures the service life of the booster pump in this embodiment.

[0033] The unique pumping method in this embodiment requires high control precision. If the pumping flow rate and pressure cannot be accurately controlled, the basic control of the mixing degree and viscosity cannot be achieved. Therefore, this embodiment uses a servo motor 25 as the driving method to avoid the above problems.

[0034] This embodiment challenges the use of an asymmetrical piston 32 pumping device. Based on the pressure difference between the left and right chambers in the cylinder, it achieves highly efficient compression and premixing of the pumping medium. Without using oil-gas separation equipment or heating equipment, it makes it possible to use a piston 32 pump with extremely high pumping efficiency to transport oil-gas mixtures, which greatly improves the pumping efficiency of oil-gas mixtures. The booster pump in this embodiment can reliably deliver large volumes of liquid, gas, and gas-liquid mixtures. It only requires adjusting the working mode of the servo motor 25 to complete the operation, making it suitable for complex mine environments. It can achieve booster and mixed transport without gas-liquid boundaries (0-100%).

[0035] In some embodiments, in order to reduce the space required for the booster pump of the present invention and improve space utilization, such as... Figure 2 As shown, the pump drive device 2 includes a gear transmission device 21; the output end of the motor 25 is connected to the gear transmission device 21, the output end of the gear transmission device 21 meshes with the external gear of the transmission nut 23, and at least a portion of the piston rod 22 is fitted inside the transmission nut 23; the portion of the piston rod 22 fitted inside the transmission nut 23 is provided with an external thread, and the external thread of the piston rod 22 is engaged with the internal thread of the transmission nut 23. Among them: the transmission nut 23 is rotatably mounted on the bracket 1 based on the bearing 24; the transmission nut 23, the piston rod 22 and the cylinder body 31 are all coaxially arranged.

[0036] In this embodiment, the transmission from the nut to the piston rod 22 is ultimately achieved. By configuring a sliding limiting groove for the piston rod 22 to limit its own rotation, the rotation of the piston rod 22 during pumping can be prevented. At the same time, the connection between the piston rod 22 and the piston 32 can also be set as a rotatable connection. Since the rotational friction of the piston 32 is greater than that of the piston rod 22, the rotation of the piston rod 22 can also be prevented.

[0037] Preferably, in this embodiment, the rotation of the piston rod 22 during linear reciprocating motion is limited by the sealing friction between the piston rod 22 and the cylinder 31.

[0038] In this embodiment, the piston rod 22 does not rotate, which can avoid some energy waste, reduce inertial energy consumption, and increase operational stability.

[0039] This embodiment adopts a simple and reliable transmission method, which increases the overall vibration resistance and further reduces the usable area.

[0040] This embodiment utilizes the piston rod 22 itself as the main body for establishing the area difference, which increases the space utilization and material utilization. At the same time, fewer components can further improve the reliability and vibration resistance of the booster pump in this embodiment.

[0041] In some embodiments, such as Figure 3 As shown, in order to enable the present invention to directly deliver unfiltered pumping media, improve the pumping efficiency of particulate matter in the pumping media, and avoid clogging of the booster pump by sand and gravel, the height of the suction section 33 in the horizontal space is greater than that of the discharge section 34; the inlet of the discharge section 34 is located at the bottom of the internal cavity 311 in the horizontal space.

[0042] In some embodiments, in order to achieve large suction and large discharge of the medium by the booster pump of the present invention, and to ensure the stability of unidirectional transmission between the suction port and the discharge port, both the suction part 33 and the discharge part 34 are one-way valves 4, the valve core end face 431 of the one-way valve 4 is spherical, and the valve seat 41 is made of hard alloy.

[0043] To further achieve the large suction and large discharge capacity of the booster pump of this invention, and to further ensure that particulate matter can be effectively discharged, such as Figure 4 , 5 As shown, the one-way valve 4 includes a valve seat 41, a valve core mounting seat 42, and a spring 44; the valve seat 41 is open at both ends, the valve core mounting seat 42 is coaxially fixed in the central through hole of the valve seat 41, and at least a part of the valve core 43 is coaxially slidably fitted in the central through hole of the valve core mounting seat 42. One end of the spring 44 acts on the valve core mounting seat 42, and the other end acts on the valve core 43, pushing the valve core end face 431 toward the inlet of the valve seat 41; The large diameter portion of the valve core end face 431 is larger than the inlet of the valve seat 41, and the one-way valve 4 is reverse locked based on its own volume. The inlet and outlet sections of the one-way valve 4 are configured to support the passage of solid impurities with a particle size of no more than 3 mm in the pumping medium.

[0044] This embodiment adopts a structural design in which the valve core mounting seat 42 is fitted inside the valve seat 41, which has good sealing performance and long service life. At the same time, the structure adopts a non-clogging design, that is, the minimum allowable diameter of the opening section of the one-way valve 4 is 3mm, so foreign objects with a particle size ≤3mm can enter and exit smoothly. In this embodiment, the discharge valve is lower than the position of the cylinder body 31, which avoids the sedimentation of particulate foreign objects in the cylinder, and can effectively remove sand and gravel in the medium without the need to add filtration and separation equipment, making it suitable for sand-containing wells.

[0045] In one embodiment, in order to improve the service life of the booster pump of the present invention, a self-compensating sealing structure is adopted between the piston 32 and the inner wall of the internal cavity 311; the sealing structure includes a scraping seal ring 321 and a wear-resistant seal ring 322 fitted on the outer surface of the piston 32; wherein the number of scraping seal rings 321 is at least two sets, and the wear-resistant seal rings 322 are disposed between the scraping seal rings 321.

[0046] Preferably, this embodiment adopts a structure with two sets of scraping seal rings 321 at both ends and two sets of wear-resistant seal rings 322 in the middle, which can effectively prevent particulate matter from wearing the piston 32 and ensure the sealing performance of the piston 32.

[0047] In this embodiment, in order to further improve the service life of the booster pump of the present invention, such as... Figure 6 As shown, both the scraper seal ring 321 and the wear-resistant seal ring 322 are fitted with elastomers in their respective sealing grooves. Each elastomer provides a preload force to the scraper seal ring 321 and the wear-resistant seal ring 322 in the direction away from the piston 32. In this embodiment, due to prolonged use, the seal rings will inevitably wear and thin. This embodiment uses a preload force based on the elastomer (which can be a spring, elastic filler, etc.) to compensate for the lost sealing tightness by moving it outward. This embodiment employs a self-compensating seal, which extends the service life of the piston 32 and reduces the maintenance frequency. Preferably, the scraper seal 321 in this embodiment is made of PEEK. The PEEK (polyetheretherketone) scraper seal 321 has significant advantages under harsh working conditions. It is resistant to high temperatures, has high mechanical properties and wear resistance, high dimensional stability, and high creep and fatigue resistance. The wear-resistant seal 322 in this embodiment is made of graphite-reinforced PTFE. The graphite-reinforced polytetrafluoroethylene (PTFE) seal combines the inherent properties of PTFE with the reinforcing effect of graphite. It performs well under specific working conditions and has self-lubricating properties, low coefficient of friction, high temperature resistance, and high thermal conductivity.

[0048] In some embodiments, to improve the sealing between the piston rod 22 and the cylinder 31, such as Figure 7 As shown, the piston rod 22 and the cylinder 31 are sealed using a combination structure of a sealing ring 221 and a retaining ring. The sealing ring 221 is a single-acting spring-body seal 44, and its low coefficient of friction ensures good dynamic sealing performance.

[0049] In some embodiments, in order to ensure the safety of the booster pump of the present invention, a pressure transmitter, a temperature transmitter, and a safety pressure relief device are installed on the inlet and outlet pipelines of the booster pump.

[0050] In some embodiments, in order to further improve space utilization and pumping flow rate, the booster pump has two sets of cylinders 31, which are coaxially arranged and fixed on the bracket 1, and the internal pistons 32 are driven based on the two ends of a set of piston rods 22 respectively. To ensure the energy utilization efficiency of the booster pump of the present invention when using the upper cylinder block 31 scheme, the number of motors 25 is two sets, which are coaxially arranged and fixed on the bracket 1, and the output ends are connected to the gear transmission mechanism.

[0051] This embodiment adopts a coaxial dual-cylinder layout, which can improve the pumping flow rate and energy utilization while ensuring vibration resistance. This embodiment can also connect a coaxial motor 25 in parallel according to power requirements to ensure the power support required for pumping flow rate and pumping head.

[0052] The embodiments of the present invention employ a single-cylinder or dual-cylinder layout, which can meet the pumping power requirements of 11-300KW, with a thrust range of 45.5-1520KN. The inlet pressure is 0.1~1.0MPa, and the output pressure is 0.5~3.5MPa. The pumping medium can be directly metered based on the mixed-transport metering device.

[0053] Traditional processes require a combination of three pieces of equipment, resulting in high investment costs, with equipment procurement expenses accounting for 60% of the total project investment. Traditional separation processes also involve multiple stages of loss and high energy consumption. The oil and gas mixed transportation reciprocating piston 32 pump directly mixes and transports the oil and gas without separation, reducing energy loss. Multiple data show that traditional processes consume more than 30% more energy than mixed-transfer pumps.

[0054] The booster pump described in the above embodiments of the present invention avoids the frequent failures of traditional equipment under sandy and high-viscosity conditions. The oil-gas mixed-transport reciprocating booster pump in this embodiment is a piston 32 pump, which is highly adaptable and can operate stably with viscosities from 0 to 55000 mPa·s. For sandy wellheads, traditional pumps are prone to clogging, while the booster pump of the present invention operates normally.

[0055] Traditional equipment suffers from frequent start-stop cycles and is prone to clogging. The booster pump in this invention has a short maintenance cycle, while the oil-gas mixed-transport reciprocating piston 32 pump has a maintenance cycle of up to 12 months. In terms of maintenance costs, the annual maintenance cost of traditional equipment is three times that of the booster pump in this invention.

[0056] Oil-gas-water mixed transportation technology is a new technology that mixes and pressurizes natural gas, crude oil, and water, and simultaneously transports them to a gas gathering station. Compared with traditional gas production processes, the booster pump in this embodiment of the invention can reduce oil, water, and natural gas separation equipment, reduce separators and pressure regulating equipment, significantly reduce wellhead equipment and space, reduce oil and gas field investment, achieve fully sealed oil and gas gathering and transportation, reduce wellhead back pressure, increase natural gas production, reduce maintenance workload, and facilitate production management.

[0057] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An intelligent multiphase booster pump device, characterized in that, Used for pumping gaseous media, liquid media, or gas-liquid mixtures; the booster pump includes: support; A pump drive unit, mounted on the bracket, provides pumping power based on a motor; A pump cylinder assembly includes a cylinder body, a piston, a piston rod, an intake section, and an exhaust section; the cylinder body is mounted on the bracket and includes an internal cavity; the piston is slidably fitted within the internal cavity; the two chambers separated by the piston are each equipped with the intake section and the exhaust section; the piston rod drives the piston to produce linear reciprocating motion based on the pump drive device; Wherein: the motor is a servo motor, which is parallel to the cylinder axis and is connected to the piston rod in a transmission connection; The piston has different working areas on both sides of the internal cavity, and the power of the motor is adjustable; the booster pump premixes the pumping medium based on adjusting the power of the motor and / or the difference in working areas on both sides of the internal cavity, so that the pumping medium does not undergo phase separation within a preset head. The piston rod enters the internal cavity from one end of the cylinder and connects to the piston; the piston has different working areas at its large and small ends.

2. The intelligent multiphase booster pump device according to claim 1, characterized in that, The pump drive device includes a gear transmission device; the output end of the motor is connected to the gear transmission device, the output end of the gear transmission device meshes with the external gear of the transmission nut, and at least a portion of the piston rod is fitted inside the transmission nut; the portion of the piston rod fitted inside the transmission nut is provided with an external thread, and the external thread of the piston rod engages with the internal thread of the transmission nut. Wherein: the transmission nut is rotatably mounted on the bracket; the transmission nut, piston rod and cylinder are all coaxially arranged.

3. The intelligent multiphase booster pump device according to claim 1, characterized in that, Both the inhalation section and the discharge section are one-way valves, and the valve core end face of the one-way valve is spherical and the valve seat is made of hard alloy. The height of the inhalation section in the horizontal space is greater than that of the discharge section; the inlet of the discharge section is located at the bottom of the internal cavity in the horizontal space; The one-way valve includes a valve seat, a valve core mounting seat, and a spring; the valve seat is open at both ends, the valve core mounting seat is coaxially fixed inside the valve seat, and at least a portion of the valve core is coaxially slidably fitted into the central through hole of the valve core mounting seat; One end of the spring acts on the valve core mounting seat, and the other end acts on the valve core, pushing the end face of the valve core toward the inlet of the valve seat; The large diameter portion of the valve core end face is larger than the inlet of the valve seat, and the one-way valve achieves reverse locking based on its own volume. The inlet and outlet sections of the one-way valve are configured to support the passage of solid impurities with a particle size of no more than 3 mm in the pumping medium.

4. The intelligent multiphase booster pump device according to claim 1, characterized in that, The piston and the inner wall of the internal cavity adopt a self-compensating sealing structure; the sealing structure includes a scraping seal ring and a wear-resistant seal ring fitted on the outer surface of the piston; wherein the number of scraping seal rings is at least two sets, and the wear-resistant seal ring is disposed between the scraping seal rings.

5. The intelligent multiphase booster pump device according to claim 4, characterized in that, Both the scraper seal ring and the wear-resistant seal ring are provided with an elastomer in the sealing groove where they are installed; each elastomer provides a preload force to the scraper seal ring and the wear-resistant seal ring in the direction away from the piston circumferential direction.

6. The intelligent multiphase booster pump device according to claim 5, characterized in that, The material of the scraper seal ring includes PEEK; the material of the wear-resistant seal ring includes graphite-reinforced PTFE.

7. The intelligent multiphase booster pump device according to claim 1, characterized in that, The piston rod and the cylinder are sealed using a combination of a sealing ring and a retaining ring.

8. The intelligent multiphase booster pump device according to claim 1, characterized in that, The booster pump is equipped with pressure transmitters, temperature transmitters, and safety pressure relief devices on its inlet and outlet pipelines.

9. The intelligent multiphase booster pump device according to claim 2, characterized in that, The booster pump has two sets of cylinders, which are coaxially arranged and fixed on the bracket. The internal pistons are driven by the two ends of the piston rod of each set. The number of motors is two sets, which are coaxially arranged and fixed on the bracket, and the output ends of both are connected to the gear transmission mechanism.

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