Intelligent multiphase booster pump arrangement

Abstract

The present application belongs to the technical field of special equipment for petroleum and chemical industry, in particular to the technical field of oil and gas mixture conveying, and specifically relates to an intelligent multiphase booster pump device for pumping gaseous medium, liquid medium or gas-liquid mixed medium; the booster pump comprises a support, a pump driving device and a pump cylinder component; the booster pump premixes the pumping medium based on the power of the motor and / or the work area difference between both sides of the internal cavity, so that the pumping medium does not separate within the preset lift. The present application innovatively uses a piston to drive the oil and gas mixed conveying, and has a larger gas carrying capacity compared with the existing mixed conveying pump. The present application uses an asymmetrically arranged piston pumping mode, and based on the pressure difference between the left and right cavities in the cylinder, the compression and premixing of the pumping medium are very efficiently realized. Without using oil and gas separation equipment and heating equipment, the piston pump with super-high pumping efficiency is used to convey the oil and gas mixture, which greatly improves the pumping efficiency of the oil and gas mixture.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of petrochemical equipment, in particular to the technical field of oil and gas mixture conveying, and specifically relates to an intelligent multiphase booster pump device. BACKGROUND

[0002] Traditional oil and gas field pressurization requires multiple devices for separate processing, and separators, centrifugal pumps and compressors are connected in series. The process flow adopts gas-liquid separation conveying, and oil, water and associated gas are conveyed through two pipelines. The associated gas pipeline is prone to freezing and blocking in winter. The device is multiple, the process is long, the energy consumption is high, the land occupation is large, the safety risk is high, and the maintenance workload is large.

[0003] In recent years, oil and gas mixing process tests such as synchronous rotary oil and gas mixing pump, eccentric rotary swing oil and gas mixing pump, small oil and gas mixing device and plunger type oil and gas mixing pump have been carried out, and certain effects have been achieved. However, there are problems such as small gas carrying capacity, poor stability and low automation, which cannot meet the needs of field use.

[0004] Oil and gas field development trend: with the increasing difficulty of oil and gas resource development, the number of complex conditions such as high gas-liquid ratio, heavy oil and marginal oil field increases, and traditional equipment cannot meet the needs. According to statistics, the proportion of global high gas-liquid ratio oil and gas field has exceeded 30%, and is on the rise, which puts forward higher requirements for pressurization equipment.

[0005] As more and more oil and gas wells have a higher oil and gas ratio, most compressors can only transport natural gas without liquid. The presence of liquid in the gas can cause serious damage to the compressor. Therefore, an oil and gas water efficient multiphase mixing device capable of simultaneously conveying crude oil, water and natural gas is particularly important. SUMMARY

[0006] Therefore, the application provides an intelligent multiphase booster pump device, which can be used as an important equipment for crude oil and natural gas exploitation and collection in the field of oil exploitation. The device does not need to install a separation buffer device and heating equipment, and can mix and transport liquid oil and gas without separation, has high space utilization, accurate flow and accurate pressure.

[0007] To achieve the above technical purposes, the technical scheme of the application is as follows:

[0008] An intelligent multiphase booster pump device, characterized by being used for pumping gaseous medium, liquid medium or gas-liquid mixed medium; the booster pump comprises:

[0009] a support;

[0010] a pump driving device installed on the support and providing pumping power based on a motor;

[0011] Pump cylinder component, including cylinder, piston, piston rod, suction part and discharge part; the cylinder is installed on the support, including internal cavity; the piston is sleeved in the internal cavity; the internal cavity is divided into two parts by the piston, and the two parts are provided with the suction part and the discharge part; the piston rod drives the piston to generate linear reciprocating motion based on the pump driving device;

[0012] The motor is a servo motor, which is axially parallel to the cylinder and is in transmission connection with the piston rod.

[0013] The working areas of the internal cavity on both sides of the piston are different, 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 working area difference of the internal cavity on both sides, so that the pumping medium does not phase separate within the preset lift;

[0014] The piston rod is connected to the piston after entering the internal cavity from one end of the cylinder; the piston is provided with different working areas based on the large end and the small end.

[0015] Further, in order to reduce the use space of the booster pump of the application and improve the space utilization, the pump driving device comprises 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 is engaged with the external gear of the transmission nut, and at least a part of the piston rod is sleeved in the transmission nut; the part of the piston rod sleeved in the transmission nut is provided with external threads, and the external threads of the piston rod are matched with the internal thread of the transmission nut;

[0016] The transmission nut is rotatably installed on the support; the transmission nut, the piston rod and the cylinder are coaxially arranged.

[0017] Further, in order to realize large suction and large discharge of the pumping medium by the booster pump of the application and ensure the stability of the one-way transmission of the suction inlet and the discharge outlet, the suction part and the discharge part are both one-way valves, the end face of the valve core of the one-way valve is spherical, and the valve seat is hard alloy.

[0018] Further, in order to make the application can directly transport pumping medium without filtering and separating, improve the pumping efficiency of particles in the pumping medium, and avoid the congestion of the booster pump caused by sand and other particles, the height of the suction part in the horizontal space is greater than that of the discharge part; the inlet of the discharge part is arranged at the bottom of the internal cavity in the horizontal space.

[0019] Further, in order to further realize the large suction and large discharge of the medium by the booster pump, and further ensure that the particulate matter can be effectively discharged, the one-way valve comprises 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 center through hole of the valve seat, and at least a part of the valve core is coaxially and slidably sleeved in the center through hole of the valve core mounting seat;

[0020] One end of the spring acts on the valve core mounting seat, and the other end acts on the valve core, so as to push the end face of the valve core towards the inlet of the valve seat;

[0021] The large diameter part of the valve core end face has a diameter larger than that of the inlet of the valve seat, and the reverse locking of the one-way valve is realized based on the volume itself;

[0022] The inlet section and the outlet section of the one-way valve are configured to support the passage of solid impurities with a particle size not greater than 3mm in the pumped medium.

[0023] Further, in order to improve the service life of the booster pump, a self-compensating sealing structure is adopted between the piston and the inner wall of the inner cavity; the sealing structure comprises a sand scraping sealing ring and a wear-resistant sealing ring sleeved on the outer surface of the piston; wherein the number of the sand scraping sealing ring is at least two groups, and the wear-resistant sealing ring is arranged between the sand scraping sealing rings.

[0024] Further, in order to improve the sealing property between the piston rod and the cylinder body, a combination structure of a pan seal ring and a sealing stop ring is adopted between the piston rod and the cylinder body.

[0025] Further, in order to further improve the service life of the booster pump, an elastic body is arranged in the sealing groove of the sand scraping sealing ring and the wear-resistant sealing ring; each elastic body gives the sand scraping sealing ring and the wear-resistant sealing ring a pre-tightening force in the circumferential direction away from the piston.

[0026] Preferably, the material of the sand scraping sealing ring comprises PEEK; and the material of the wear-resistant sealing ring comprises graphite reinforced polytetrafluoroethylene.

[0027] In order to ensure the safety of the booster pump, a pressure transmitter, a temperature transmitter and a safety pressure relief device are arranged on the inlet and outlet pipelines of the booster pump.

[0028] Further, in order to further improve the space utilization and further improve the pumping flow, the number of the cylinder bodies of the booster pump is two groups, which are coaxially arranged and fixed on the bracket, and the internal pistons are respectively driven based on the two ends of one group of the piston rods.

[0029] Further, in order to ensure the energy utilization efficiency of the supercharging pump when the upper cylinder body scheme is adopted, the number of the motors is two groups, coaxially arranged and fixed on the support, and the output ends are all in driving connection with the gear rotating device.

[0030] By adopting the technical scheme, the application can bring the following beneficial effects:

[0031] The application innovatively adopts the piston driving to realize the oil-gas mixed transportation, and has larger gas carrying capacity than the existing mixed transportation pump, adopts the motor as the driving power, has high energy utilization rate, better stability and high automation degree; as the application has compact overall structure and adopts the servo motor as the power, the application challenges the asymmetrically arranged piston pumping mode, realizes the compression and premixing of the pumping medium based on the pressure difference between the left and right cavities in the cylinder, realizes the transportation of the oil-gas mixture by the piston pump with high pumping efficiency without using the oil-gas separation equipment and heating equipment, and greatly improves the pumping efficiency of the oil-gas mixture;

[0032] The supercharging pump of the application can normally and reliably transport the liquid medium, the gas medium and the gas-liquid mixed medium, and only needs to adjust the working mode of the servo motor to complete the operation, and is suitable for the complex in-mine environment;

[0033] The application is beneficial to the pipeline liquid oil-gas mixed transportation without separation, complete recovery of associated gas, and solving of many safety and environmental protection problems of the traditional gathering and transportation process;

[0034] The application can improve the oil-gas mixed transportation capacity and the reliability of the device operation, solve the technical bottleneck of the normal temperature oil-gas mixed transportation, and lay a foundation for the creation and popularization of the new oil-gas mixed transportation mode;

[0035] The application can reduce the manual intervention to realize the unattended operation, reduce the risk and comprehensive cost;

[0036] The supercharging pump of the application does not need to use the scale and wax removal device, reduces the wellhead equipment, and simplifies the process flow. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical scheme of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0038] Figure 1 It is an overall structure schematic diagram of an intelligent multiphase supercharging pump device in the specific embodiment of the application.

[0039] Figure 2Structure diagram of the driving device for the pump in the embodiment of the present application;

[0040] Figure 3 Structure diagram of the pump cylinder component in the embodiment of the present application;

[0041] Figure 4 Structure diagram of the one-way valve applied to the suction part;

[0042] Figure 5 Structure diagram of the one-way valve applied to the discharge part;

[0043] Figure 6 Structure diagram of the piston;

[0044] Figure 7 Structure diagram of the seal between the piston rod and the cylinder;

[0045] Wherein: 1, support; 2, driving device for the pump; 21, gear transmission device; 22, piston rod; 221, piston ring; 23, transmission nut; 24, bearing; 25, motor; 3, pump cylinder component; 31, cylinder; 311, internal cavity; 32, piston; 321, sand scraping seal ring; 322, wear-resistant seal ring; 33, suction part; 34, discharge part; 4, one-way valve; 41, valve seat; 42, valve core mounting seat; 43, valve core; 44, spring; 431, valve core end face. DETAILED DESCRIPTION

[0046] The embodiments of the present application will be described in detail below with reference to the drawings.

[0047] The above embodiments of the present application are described with reference to the drawings, but the present application is not limited to the above embodiments. Embodiments of the present application can be implemented in various ways, and various modifications can be made based on the technical concepts disclosed in the present specification without departing from the spirit of the present application. Therefore, the technical scope of the present application should be determined by the technical concepts disclosed in the present specification and the scope of the claims, and not by the above-described embodiments.

[0048] It is to be understood that the embodiments described herein are illustrative only and the scope of the appended claims should not be limited thereby. The aspects described herein can be implemented in any of numerous ways, as will be apparent to those skilled in the art. It should be noted that the aspects described herein can be implemented by hardware, software, firmware or any combination thereof. It should be appreciated that any feature or combination of features described herein can be implemented with or without using any or all of the following technologies: software, hardware, firmware, or any combination thereof.

[0049] It is also to be understood that the above-referenced apparatus, methods and devices are merely meant to be illustrative of the many alternatives that are envisioned and are not meant to be limiting in any way.

[0050] In addition, in the following description, numerous specific details are provided for a thorough understanding of the examples. One skilled in the relevant art will recognize, however, that the aspects described herein can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth.

[0051] In one embodiment of the present application, an intelligent multi-phase booster pump device is proposed for pumping gaseous medium, liquid medium or gas-liquid mixed medium; as shown in the figure, the booster pump comprises: Figure 1 As shown in the figure, the booster pump comprises:

[0052] a bracket 1;

[0053] a pump driving device 2 mounted on the bracket 1, providing pumping power based on a motor 25;

[0054] a pump cylinder component 3 comprising a cylinder body 31, a piston 32, a piston rod 22, a suction part 33 and a discharge part 34; the cylinder body 31 is mounted on the bracket 1 and comprises an internal cavity 311; the piston 32 is slidingly sleeved in the internal cavity 311; both parts of the internal cavity 311 separated by the piston 32 are configured with the suction part 33 and the discharge part 34; the piston rod 22 drives the piston 32 to produce linear reciprocating motion based on the pump driving device 2;

[0055] wherein: the motor 25 is a servo motor 25, axially parallel to the cylinder body 31, and transmission connected with the piston rod 22;

[0056] 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

[0057] The difference of working area between the two sides of the internal cavity 311 pre-mixes the pumping medium, so that the pumping medium does not separate in the preset lift.

[0058] In the embodiment, in order to realize the difference of working area with minimum cost and improve the pre-mixing of the pumping medium, the piston rod 22 is connected to the piston 32 after entering the internal cavity 311 from one end of the cylinder 31. Figure 3 As shown, the piston rod 22 is connected to the piston 32 after entering the internal cavity 311 from one end of the cylinder 31; the piston 32 is provided with different working areas based on the large end and the small end. Because the working areas of the medium on the two sides of the piston 32 are different but the driving force is consistent, the medium pumped from the two sides of the cylinder 31 has a pressure difference, and the compression amount of the gas in the oil-gas mixture also has a difference. When the two oil-gas mixtures with pressure difference meet in the conveying pipeline or other special containers, they will be mixed violently (equivalent to molecular diffusion) because they need to generate new pressure balance, and the mixing degree of the pumping medium will be greatly improved. This mixing method equivalent to molecular diffusion is much better than the mixing measures based on structural manufacturing of turbulence, so the present application can support pumping of various phase media without heating (the heating process of the prior art is also to improve the molecular motion speed).

[0059] The working mode of the booster pump in the embodiment: under the driving of the motor 25, the reciprocating motion of the piston 32 changes the volume of the working chamber, and the fluid is sucked and discharged by using the pressure difference.

[0060] Suction stage: the piston 32 moves, the volume of the cylinder 31 increases, a local vacuum is formed,

[0061] The suction valve is opened under the action of the pressure difference, the discharge valve is closed, and the external fluid enters the cylinder 31 through the suction valve.

[0062] The suction valve enters the cylinder 31;

[0063] Compression stage: the piston 32 moves, the volume of the cylinder 31 decreases, the suction valve and the discharge valve

[0064] are closed, the medium in the cylinder 31 is compressed, the pressure rises, and when the medium pressure exceeds the pipeline pressure, the discharge valve is opened, and the fluid is discharged.

[0065]

[0066] ​The support 1 and each component of the embodiment are integrally installed in a pry manner to reduce the use area; in the embodiment, the driving device 2 for the pump is powered by a servo motor 25, the power of which is controllable, reversible and controllable in single motion stroke, and the rotation angle amount thereof is detected based on an absolute value encoder, facilitating the control of an operator; the embodiment is configured with an electric cabinet, the electric cabinet is connected with multiple sensors such as pressure transmitters and temperature transmitters arranged on the inlet and outlet pipelines of the booster pump to monitor the working state of the booster pump of the embodiment, and the operator can adjust the working mode of the servo motor 25 according to the working state or analyze the source of abnormality or shut down the booster pump when abnormal data occurs.

[0067] Due to the compact overall structure of the embodiment, coaxial, axial parallel and other arrangement modes are mostly adopted, and a certain anti-vibration performance is achieved.

[0068] The asymmetric piston 32 pumping mode of the embodiment is adopted, the internal cavity 311 of the cylinder body 31 is a cylindrical straight cylinder, the working area of one end of the piston 32 is smaller than that of the other end, and when the medium is pressurized by the piston 32, there is a pressure difference between the media on both sides of the piston 32. Under this structure, the media on both sides will be pumped at the same time, and when the media pumped from both sides of the discharge part 34 meet, due to the pressure difference between them, the gas in the medium with higher pressure will expand rapidly, increasing the phase mixing degree of the pumped medium, and at the same time, the medium viscosity will be increased.

[0069] In existing devices, a plunger pump and other modes are used to pump gas-liquid mixed medium (such as mixed medium of oil and natural gas), the pressure can meet the requirements, but the pumping flow is lower than that of the piston 32 pump;

[0070] Although the traditional piston 32 pump has high pumping flow, when pumping gas-liquid mixed medium, it cannot itself realize that the mixing degree and viscosity of the gas-liquid mixed medium meet the requirements of lift, so it needs to be matched with a gas-liquid separation device, and different booster pumps are used to transport them respectively.

[0071] Due to the special structure of the pump cylinder assembly of the embodiment, it has a certain vibration during operation (when the two groups of media with pressure difference meet), so the embodiment improves the anti-vibration performance of the overall structure and ensures the service life of the booster pump of the embodiment.

[0072] The unique pumping mode of the embodiment requires high control accuracy, if the pumping flow and pressure cannot be accurately controlled, the basic control of the mixing degree and viscosity cannot be realized, so the embodiment adopts a servo motor 25 as a driving mode to avoid the above problems.

[0073] The embodiment challenges the asymmetrically arranged piston 32 pumping device, and realizes the compression and premixing of the pumping medium based on the pressure difference between the left and right cavities in the cylinder. The oil-gas mixture is pumped by the piston 32 with high pumping efficiency without using oil-gas separation equipment and heating equipment, and the pumping efficiency of the oil-gas mixture is greatly improved.

[0074] The booster pump of the embodiment can normally and reliably deliver large flow of liquid medium, gaseous medium and gas-liquid mixed medium, and only needs to adjust the working mode of the servo motor 25 to complete the operation, which is suitable for complex in-mine environment. The booster pump can realize the gas-liquid boundary-free (0-100%) booster mixing and delivery function.

[0075] In some embodiments, in order to reduce the use space of the booster pump and improve the space utilization, as shown in Figure 2 The pump driving 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 engages with the external gear of the transmission nut 23, and at least a part of the piston rod 22 is sleeved in the transmission nut 23. The part of the piston rod 22 sleeved in the transmission nut 23 is provided with external threads, and the external threads of the piston rod 22 are matched with the internal threads of the transmission nut 23.

[0076] Among them: the transmission nut 23 is rotatably installed on the support 1 based on the bearing 24; the transmission nut 23, the piston rod 22 and the cylinder body 31 are coaxially arranged.

[0077] The embodiment finally transmits to the piston rod 22 based on the nut, and can avoid the rotation of the piston rod 22 in the pumping process after the piston rod 22 is configured with a sliding limiting groove limiting its own rotation. At the same time, the connection between the piston rod 22 and the piston 32 can also be set as a rotary connection, so that the rotation of the piston rod 22 can also be avoided due to the larger rotary friction of the piston 32.

[0078] Preferably, the embodiment limits the rotation of the piston rod 22 in the linear reciprocating motion based on the sealing friction between the piston rod 22 and the cylinder body 31.

[0079] The non-rotation of the piston rod 22 of the embodiment can avoid part of the energy waste, reduce the inertial energy consumption, and increase the operation stability.

[0080] The embodiment adopts a simple and reliable transmission mode, increases the overall anti-vibration performance and further reduces the use area.

[0081] The embodiment uses the piston rod 22 itself as the main body to establish the area difference, increases the space utilization and material utilization, and further improves the reliability and anti-vibration performance of the booster pump.

[0082] In some embodiments, as shown in Figure 3 In order to directly deliver the pumped medium without filtration separation, improve the pumping efficiency of particles in the pumped medium, and avoid the blockage of the booster pump caused by particles such as sand, the height of the suction part 33 in the horizontal space is greater than that of the discharge part 34; the inlet of the discharge part 34 is arranged at the bottom of the internal cavity 311 in the horizontal space.

[0083] In some embodiments, in order to realize the large suction and large discharge of the booster pump of the present application, and ensure the stability of the one-way transmission of the suction inlet and the discharge outlet, the suction part 33 and the discharge part 34 are both one-way valves 4, the valve core end surface 431 of the one-way valve 4 is spherical, and the valve seat 41 is hard alloy.

[0084] In order to further realize the large suction and large discharge of the booster pump of the present application, and further ensure that the particles can be effectively discharged, as shown in Figure 4 、 5 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 center through hole of the valve seat 41, and at least a part of the valve core 43 is coaxially and slidingly sleeved in the center through hole of the valve core mounting seat 42;

[0085] 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 surface 431 towards the inlet of the valve seat 41;

[0086] The large diameter part of the valve core end surface 431 has a diameter greater than that of the inlet of the valve seat 41, and the reverse locking of the one-way valve 4 is realized based on the volume;

[0087] The inlet cross section and the outlet cross section of the one-way valve 4 are configured to support the passage of solid impurities in the pumped medium with a particle size not greater than 3mm.

[0088] The valve core mounting seat 42 is sleeved in the valve seat 41 in this embodiment, which has good sealing performance and long service life; at the same time, the structure adopts a block-free design, that is, the minimum allowable diameter of the opening cross section of the one-way valve 4 is 3mm, so that foreign matters with a particle size ≤3mm can smoothly enter and exit; the discharge valve of this embodiment is lower than the position of the cylinder body 31, which avoids the sedimentation of particulate foreign matters in the cylinder, can effectively remove sand and gravel in the medium, does not need to increase filtration separation equipment, and is suitable for sand-containing wells.

[0089] In one embodiment, in order to improve the service life of the booster pump of the present application, 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 sand scraping sealing ring 321 and a wear-resistant sealing ring 322 sleeved on the outer surface of the piston 32; the number of the sand scraping sealing ring 321 is at least two groups, and the wear-resistant sealing ring 322 is arranged between the sand scraping sealing rings 321.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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 rotation device 21 for transmission.

[0096] The embodiment adopts a coaxial double-cylinder layout, improves energy utilization rate while improving pumping flow, and also ensures anti-vibration performance; the embodiment can also parallel the coaxial motor 25 according to power demand, to ensure power support required by pumping flow and pumping head.

[0097] The above embodiment of the present application adopts a single-cylinder or double-cylinder layout, can meet the pumping power demand of 11-300KW, and the thrust range is 45.5-1520KN. The inlet pressure is 0.1-1.0MPa, and the external delivery pressure is 0.5-3.5MPa. The pumping medium can be directly metered based on the mixed delivery metering device.

[0098] The traditional process needs to be combined with 3 equipment, has high investment cost, and the equipment procurement cost accounts for 60% of the total investment of the project; the traditional separation process has multiple link losses and high energy consumption, and the oil-gas mixed delivery reciprocating piston 32 pump directly mixes and delivers without separation, thereby reducing energy loss.

[0099] Multiple data show that the energy consumption of the traditional process is more than 30% higher than that of the mixed delivery pump.

[0100] The above embodiment of the present application can avoid the problem that the traditional equipment frequently fails under the condition of sand-containing and high viscosity. The oil-gas mixed delivery reciprocating booster pump of the embodiment is a piston 32 pump, has strong adaptability, and can stably operate at a viscosity of 0-55000 mPa·s. For a sand-containing wellhead, the traditional pump is prone to be blocked, and the booster pump of the present application can operate normally.

[0101] The traditional equipment frequently starts and stops and is prone to be blocked, the booster pump of the embodiment of the present application has a short maintenance period, the oil-gas mixed delivery reciprocating piston 32 pump has a maintenance period of 12 months, and the annual maintenance cost of the traditional equipment is 3 times that of the booster pump of the embodiment of the present application.

[0102] The oil-gas-water mixed delivery technology is a new technology for simultaneously mixing, boosting and delivering natural gas, crude oil and water to a gas gathering station. Compared with the traditional gas production process, the booster pump of the embodiment of the present application can reduce oil, water and natural gas separation equipment, reduce separators and pressure regulating equipment, greatly reduce wellhead equipment and space, reduce oil and gas field investment, realize oil and gas full-sealing gathering and delivery, well bottom and wellhead back pressure, increase natural gas production, reduce maintenance workload, and be beneficial to production management.

[0103] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. An intelligent multiphase booster pump apparatus, characterized by, The application relates to a supercharged pump for pumping gaseous, liquid or gas-liquid mixed media. A support; A pump driving device is installed on the support and provides pumping power based on a motor; A pump cylinder component comprises a cylinder, a piston, a piston rod, a suction part and a discharge part; the cylinder is installed on the support and comprises an internal cavity; the piston is slidably sleeved in the internal cavity; both parts of the internal cavity separated by the piston are provided with the suction part and the discharge part; the piston rod drives the piston to produce linear reciprocating motion based on the pump driving device; The motor is a servo motor, axially parallel to the cylinder and in transmission connection with the piston rod; The piston has different working areas on both sides of the internal cavity, and the power of the motor can be adjusted; the supercharged pump premixes the pumping medium based on adjusting the power of the motor and / or the working area difference on both sides of the internal cavity, so that the pumping medium does not separate within a preset lift; The piston rod enters the internal cavity from one end of the cylinder and is connected with the piston; the piston has different working areas based on a large end and a small end; The pump driving device comprises a gear transmission device; the output end of the motor is connected with the gear transmission device, the output end of the gear transmission device is engaged with the external gear of a transmission nut, at least a part of the piston rod is sleeved in the transmission nut; the part of the piston rod sleeved in the transmission nut is provided with external threads, the external threads of the piston rod are matched with the internal thread of the transmission nut; the transmission nut is rotatably installed on the support; the transmission nut, the piston rod and the cylinder are coaxially arranged; The cylinder of the supercharged pump is two groups, coaxially arranged and fixed on the support, and the internal pistons are respectively driven by two ends of one group of the piston rods; the number of the motors is two groups, coaxially arranged and fixed on the support, and the output ends are all in transmission connection with the gear transmission devices.

2. The intelligent multiphase booster pump apparatus of claim 1, wherein, The suction part and the discharge part are both one-way valves, the end face of the valve core of the one-way valve is spherical, and the valve seat is hard alloy; The height of the suction part in the horizontal space is greater than that of the discharge part; the inlet of the discharge part is arranged at the bottom of the internal cavity in the horizontal space; The one-way valve comprises 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 valve seat, and at least a part of the valve core is coaxially and slidably sleeved in the center 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, so as to push the end face of the valve core to the inlet of the valve seat; The large-diameter part of the end face of the valve core has a diameter greater than that of the inlet of the valve seat, and the reverse locking of the one-way valve is realized based on the volume of the valve core; The inlet cross section and the outlet cross section of the one-way valve are configured to support solid impurities in the pumping medium with a particle size not greater than 3 mm to pass through.

3. The intelligent multiphase booster pump apparatus of claim 1, wherein, A self-compensating sealing structure is adopted between the piston and the inner wall of the internal cavity; the sealing structure comprises a sand scraping sealing ring and a wear-resistant sealing ring sleeved on the outer surface of the piston; the number of the sand scraping sealing rings is at least two groups, and the wear-resistant sealing ring is arranged between the sand scraping sealing rings.

4. The intelligent multiphase booster pump apparatus of claim 3, wherein, The sealing groove, in which the sand scraping sealing ring and the wear-resistant sealing ring are installed, is provided with an elastic body; each elastic body gives the sand scraping sealing ring and the wear-resistant sealing ring a pre-tightening force away from the circumferential direction of the piston.

5. The intelligent multiphase booster pump apparatus of claim 4, wherein, The material of the sand scraping sealing ring comprises PEEK; and the material of the wear-resistant sealing ring comprises graphite reinforced PTFE.

6. The intelligent multiphase booster pump apparatus of claim 1, wherein, The piston rod and the cylinder body are sealed by a combined structure of a pan seal ring and a sealing block ring.

7. The intelligent multiphase booster pump apparatus of claim 1, wherein, The inlet and outlet pipelines of the booster pump are provided with a pressure transmitter, a temperature transmitter and a safety pressure relief device.

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