Oil-gas multiphase pump device capable of conveying oil gas in cold mode

Abstract

An oil-gas multiphase pump device capable of conveying oil gas in a cold mode comprises a base, an oil-gas multiphase pump, a liquid inlet connecting pipe, a lifting booster pump, an oil-gas filter and a liquid outlet connecting pipe are installed on the base, the liquid inlet connecting pipe is communicated with the lifting booster pump, the oil-gas multiphase pump comprises a machine body and a fluid end integrated with the machine body, and the machine body is connected with the lifting booster pump. The lifting booster pump comprises a pump body and a piston rod, an assembly cavity is formed in the pump body, the shaft extension end of the crankshaft is arranged in the assembly cavity in a matched mode, an eccentric wheel is arranged on the crankshaft, and the eccentric wheel and the piston rod are arranged in a matched mode. Oil gas sucked from the liquid inlet connecting pipe is pressurized and then enters the oil gas filter through rotation of the eccentric wheel and reciprocating work of the piston rod, the filtered oil gas enters the fluid end through the connecting pipe and then is discharged from the liquid outlet connecting pipe, and oil gas cold transportation can be implemented.

Description

Technical Field

[0001] The invention relates to the technical field of oil-gas mixed transportation, and in particular to an oil-gas mixed transportation pump device capable of cold-transporting oil and gas. Background Art

[0002] The conventional process of transporting crude oil and gas in oil and gas fields is to transport them from the oil wells through pipelines to the joint station and enter the buffer tank (30-50 cubic meters) cavity. After being buffered, they enter the three-phase separator to separate the gas and liquid. After that, the gas is transported to the platform of the next station by the compressor. The liquid enters the heating furnace for heating and then is transported to the next station through the oil pump for dehydration treatment. In recent years, a variety of oil and gas mixed transmission pumps and devices have entered the field for process operation, including rotary screw pumps, rotor pumps, centrifugal pumps, reciprocating plunger pumps, piston pumps, hydraulic pumps, etc., all of which use hot transmission, that is, the liquid from the well passes through the buffer tank and heating furnace. Especially in winter, the temperature of crude oil transported from the wellhead is ≥11°C, but with the different distances from the well location, the crude oil must generally be heated by the heating furnace of the gathering station before entering the pipeline and various mixed transmission pumps for transportation. In the selection, reliability and effectiveness of mixed transmission equipment, the reciprocating oil and gas mixed transmission device is the most suitable, so that it is widely used in various oilfield field conditions to implement oil and gas mixed transmission after heating; due to the increasingly high requirements of oilfield users for environmental protection and safety, the buffer tanks and heating furnaces on site are pressure vessels, and the annual inspection and routine safety inspections will increase the oilfield management cost and special management tasks; it is very necessary to design an oil and gas mixed transmission pump device that can implement the cold transmission oil and gas process, which can reduce management costs and further improve the environmental safety factor on site. Summary of the invention

[0003] In view of the shortcomings and defects of the prior art, an oil-gas mixed transmission pump device capable of cold transmission of oil and gas is provided. To achieve the purpose of cold transmission of oil and gas, the present invention provides the following technical solutions.

[0004] The present invention provides an oil-gas mixed flow pump device capable of cold-transmitting oil and gas, comprising a base, on which are mounted an oil-gas mixed flow pump, a liquid inlet pipe, a lifting and boosting pump, an oil-gas filter and a liquid outlet pipe, the liquid inlet pipe being connected to the lifting and boosting pump, the oil-gas mixed flow pump comprising a fuselage and a hydraulic end integrally arranged with the fuselage, the fuselage being connected to the lifting and boosting pump, the hydraulic end being connected to the liquid outlet pipe, and the hydraulic end being connected to the oil-gas filter via a connecting pipe, a crankshaft being arranged in the fuselage, the lifting and boosting pump comprising a pump body and a piston rod, an assembly cavity being formed in the pump body, the axial extension end of the crankshaft being cooperatively arranged in the assembly cavity, and an eccentric wheel being arranged on the crankshaft, the eccentric wheel being cooperatively arranged with the piston rod, the eccentric wheel rotating and reciprocatingly performing work with the piston rod, the oil and gas sucked from the liquid inlet pipe being pressurized and then entering the oil-gas filter, and after being filtered, entering the hydraulic end through the connecting pipe and then being discharged from the liquid outlet pipe.

[0005] Compared with the prior art, the present invention arranges a lifting booster pump between the oil-gas mixed flow pump and the oil-gas filter, and increases the pressure in the oil-gas filter by the reciprocating work of the eccentric wheel and the piston rod arranged in the lifting booster pump, thereby reducing the compression ratio and improving the suction performance of the reciprocating oil-gas mixed flow pump. The oil and gas pressure in the oil and gas filter increases and is higher than the oil and gas pressure in the pipeline to reduce oil and gas volatilization, which is beneficial to cold transmission and meets the requirements of cold transmission working conditions.

[0006] Furthermore, a cylinder sleeve is installed on the inner wall of the pump body, a retaining ring is provided at the lower end of the cylinder sleeve, the upper end surface of the retaining ring is abutted against the lower end surface of the cylinder sleeve, the piston rod is installed between the cylinder sleeves, the outer surface of the piston rod protrudes toward the cylinder sleeve to form a raised portion, and a sealing block is provided on the raised portion, and the sealing block is abutted against the inner wall of the cylinder sleeve.

[0007] Through the above improvements, a cylinder liner is installed on the inner wall of the pump body, and a retaining ring is arranged at the lower end of the cylinder liner. The upper end surface of the retaining ring abuts against the lower end surface of the cylinder liner. The arranged cylinder liner can support the reciprocating motion of the piston rod and reduce the direct friction with the inner wall of the pump body. The sealing block arranged on the raised portion abuts against the inner wall of the cylinder liner to play a sealing role, preventing oil and gas from entering and affecting the crankshaft and other components.

[0008] Furthermore, a liquid inlet valve is arranged on one side of the assembly cavity close to the liquid inlet pipe, a flow cavity is formed between the liquid inlet valve and the piston rod, a return spring is arranged in the flow cavity, one end of the return spring is sleeved on the piston rod and abuts against the lower end surface of the raised portion, and the other end abuts against the upper end surface of the liquid inlet valve core.

[0009] Through the above improvements, a return spring is arranged between the liquid inlet valve core and the piston rod, and the return spring can help the piston rod to be reset, so that the piston rod can be extended and retracted next time to achieve the effect of reciprocating motion.

[0010] Furthermore, the liquid inlet valve includes a liquid inlet valve seat and a liquid inlet valve core, the liquid inlet valve core is installed in the liquid inlet valve seat, and a first flange is provided between the liquid inlet valve seat and the liquid inlet connecting pipe; the liquid inlet valve core includes a liquid inlet stop block, a liquid inlet spring and a liquid inlet top block, one end of the liquid inlet spring is abutted against the liquid inlet top block, and the other end is abutted against the liquid inlet stop block, a liquid inlet cavity is formed between the liquid inlet top block and the liquid inlet stop block, the liquid inlet cavity is connected with the flow cavity, and a flow hole connected with the liquid inlet cavity is provided on the liquid inlet top block, and the height of the flow hole close to the liquid inlet valve seat is lower than the height away from the liquid inlet valve seat.

[0011] Through the above improvements, a first flange is arranged between the liquid inlet valve seat and the liquid inlet pipe, and the arranged first flange improves the sealing performance of the connection between the liquid inlet pipe and the pump body to prevent liquid leakage; the liquid inlet valve includes a liquid inlet valve core and a liquid inlet valve seat, and the liquid inlet valve seat can keep in close contact with the liquid inlet valve core, and can play a sealing role under normal circumstances; the arranged liquid inlet valve can change the flow rate of the incoming oil and gas according to demand, and the discharge valve can automatically close when the internal pressure is too large, so as to prevent the sudden increase of the pressure of the manifold pipeline due to the instantaneous increase of the downhole production on site during the emergency period, thereby causing an explosion and oil spraying accident; the liquid inlet valve core includes a liquid inlet block, a liquid inlet spring and a liquid inlet top block, and a liquid inlet cavity is formed between the liquid inlet top block and the liquid inlet block, and the liquid inlet cavity is connected with the flow cavity, and a flow hole is arranged on the liquid inlet top block, so that the oil and gas can smoothly enter the flow cavity for pressurization during liquid inlet; the flow hole is arranged obliquely, and the height of the flow hole close to the liquid inlet valve seat is lower than the height of the side away from the liquid inlet valve seat, so that the oil and gas can enter the liquid inlet cavity conveniently.

[0012] Furthermore, a first limiting ring is provided on the side of the liquid inlet block close to the piston rod, and the first limiting ring is integrated with the liquid inlet block. The side wall of the first limiting ring abuts against the inner wall of the pump body, and the first limiting ring abuts against the end face of the liquid inlet valve seat close to the piston rod.

[0013] Through the above improvements, a first limit ring is provided on the side of the liquid inlet block close to the piston rod. The first limit ring can facilitate the installation of the liquid inlet valve, making the installation of the liquid inlet valve core and the liquid inlet valve seat more secure. At the same time, it can also prevent the liquid inlet valve from directly contacting the pump body for a long time, thereby causing wear and affecting the sealing effect.

[0014] Furthermore, a liquid outlet cavity is provided on a side of the pump body close to the oil and gas filter, the liquid outlet cavity is connected with the discharge pipe, a liquid outlet valve is installed in the liquid outlet cavity, and a second flange is provided between the liquid outlet valve and the discharge pipe, the liquid outlet valve comprises a liquid outlet valve core, a liquid outlet valve seat and a second limiting ring, the second limiting ring is clamped and arranged in the liquid outlet cavity, and abuts against a side of the liquid outlet valve core away from the liquid outlet valve seat; the liquid outlet valve core comprises a liquid outlet top block, a liquid outlet spring and a liquid outlet stop block, one end of the liquid outlet spring abuts against the liquid outlet top block, and the other end abuts against the liquid outlet stop block, the diameter of the liquid outlet top block is smaller than the diameter of the liquid outlet cavity, a liquid outlet channel is formed between the liquid outlet top block and the liquid outlet cavity, a liquid outlet hole is provided in the liquid outlet stop block, oil and gas enter the liquid outlet hole from the liquid outlet channel, and the liquid outlet hole is connected with the discharge pipe.

[0015] Through the above improvements, a liquid outlet chamber is provided on the side of the pump body close to the oil and gas filter, and the liquid outlet chamber is connected with the drain pipe, so as to facilitate the discharge of pressurized oil and gas from the pump body into the oil and gas filter; and a second flange is provided between the liquid outlet valve and the drain pipe, and the provided second flange can improve the sealing of the connection between the inlet and outlet liquid chambers and the drain pipe; the second limit ring is clamped in the liquid outlet chamber and abuts against the side of the liquid outlet valve core away from the liquid outlet valve seat; the second limit ring provided at the end of the discharge valve away from the piston rod can prevent the discharge valve from loosening and falling off during use.

[0016] Furthermore, the oil-gas filter includes an outer shell, a partition plate, and a filter screen. A mixing chamber is formed in the outer shell. The partition plate is arranged in the mixing chamber, and the partition plate divides the mixing chamber into a first chamber and a second chamber. The filter screen is installed in the first chamber. A flow port is provided on the outer shell, and the flow port is connected to the drain pipe. A balancing valve is provided in the mixing chamber at the drain port; a liquid outlet is provided in the second chamber, and the liquid outlet is connected to the connecting pipe.

[0017] Through the above improvements, the oil and gas filter includes an outer shell, a partition plate, and a filter net. The partition plate divides the mixing chamber in the outer shell into a first chamber and a second chamber. After the oil and gas are filtered in the first chamber, they enter the second chamber and are then discharged, so that the quality of the oil and gas discharged from the liquid outlet is higher.

[0018] Furthermore, an inclined baffle is arranged in the first chamber, and the inclined baffle is inclined toward the flow port, and an installation port is arranged on the inclined baffle. The filter screen is installed on the inclined baffle through the installation port. The filter screen is a cylindrical filter screen with one end open, and a retaining edge is arranged on the upper end of the filter screen, and the retaining edge is against the inclined baffle.

[0019] Through the above improvements, an inclined baffle is arranged in the first chamber, the inclined baffle is inclined toward the flow port, and an installation port is arranged on the inclined baffle. The filter is installed on the inclined baffle through the installation port, and the opening of the filter corresponds to the flow port, so as to facilitate filtering of oil and gas after entering; a retaining edge is arranged at the upper end of the filter, and the retaining edge is abutted against the inclined baffle, so that the filter can be installed more stably and prevent the filter from being unstable due to excessive weight when the filter is filled with oil and gas.

[0020] Furthermore, a return pipeline is provided between the oil-gas filter and the liquid inlet pipe, and a first check valve is provided on the return pipeline.

[0021] Through the above improvements, a reflux pipeline is arranged between the oil and gas filter and the liquid inlet pipe, and a first check valve is arranged on the reflux pipeline. The reflux pipeline can allow the oil and gas that are not filtered by the oil and gas filter to flow back into the liquid inlet pipe to continue subsequent operations, and the arranged first check valve can ensure that the flow direction of the unfiltered oil and gas is always unified.

[0022] Furthermore, a bypass pipeline is arranged between the liquid inlet pipe and the liquid outlet pipe, a first stop valve is arranged on the side of the bypass pipeline close to the liquid inlet pipe, a second stop valve is arranged on the side close to the liquid outlet pipe, and a check valve is arranged between the first stop valve and the second stop valve.

[0023] Through the above improvements, a bypass pipeline is arranged between the liquid inlet pipe and the liquid outlet pipe, and a first stop valve is arranged on the side of the bypass pipeline close to the liquid inlet pipeline, and a second stop valve is arranged on the side close to the liquid outlet pipeline. When the pressure in the liquid inlet pipe exceeds that in the liquid outlet pipe, the first stop valve and the second stop valve in the bypass pipeline are opened, and the oil and gas medium flows directly from the liquid inlet pipe to the liquid outlet pipe to prevent the inlet manifold of the reciprocating oil and gas mixed transmission pump from overpressure bursting and oil spraying accidents, and overcome the uneven oil and gas production during the day, and the oil and gas cold transportation can still achieve normal and safe transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the device; Figure 2 It is a schematic diagram of the cross-sectional structure of the lifting and boosting pump of the device; Figure 3 It is a structural schematic diagram of the oil and gas filter of the device; Figure 4 It is a schematic diagram of the cross-sectional structure of the oil and gas filter at AA of the device; Figure 5 It is a schematic diagram of the cross-sectional structure at BB of the oil and gas filter of the device.

[0025] Among them, 1. base; 2. oil-gas mixed pump; 2.1. fuselage; 2.2. hydraulic end; 2.3. crankshaft; 2.4. eccentric wheel; 3. liquid inlet pipe; 4. lifting boost pump; 4.1. pump body; 4.2. piston rod; 4.21. raised part; 4.3. discharge pipe; 4.4. assembly chamber; 4.5. cylinder sleeve; 4.6. retaining ring; 4.7. sealing block; 4.8. flow chamber; 4.9. return spring; 4.10. liquid outlet chamber; 5. oil-gas filter; 5.1. outer shell; 5.11. flow port; 5.12. liquid outlet; 5.2. partition plate; 5.3. filter screen; 5.31. retaining edge; 5.4. mixing chamber; 5.41. first chamber; 5.42. second chamber; 5.5. inclined baffle; 5.51. installation port; 5.6. flat Balance valve; 6. Liquid outlet pipe; 7. Connecting pipe; 8. Liquid inlet valve; 8.1. Liquid inlet valve seat; 8.2. Liquid inlet valve core; 8.21. Liquid inlet block; 8.22. Liquid inlet spring; 8.23. Liquid inlet top block; 8.24. Liquid inlet cavity; 8.25. Flow hole; 8.3. First flange; 8.4. First limiting ring; 9. Liquid outlet valve; 9.1. Liquid outlet valve core; 9.11. Liquid outlet top block; 9.12. Liquid outlet spring; 9.13. Liquid outlet block; 9.14. Liquid outlet hole; 9.15. Liquid outlet channel; 9.2. Liquid outlet valve seat; 9.3. Second limiting ring; 9.4. Second flange; 10. Return line; 10.1. First check valve; 11. Bypass line; 11.1. First stop valve; 11.2. Second stop valve; 11.3. Second check valve. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] like Figures 1 to 5The oil-gas mixed delivery pump 2 device capable of cold delivery of oil and gas comprises a base 1, on which are mounted the oil-gas mixed delivery pump 2, a liquid inlet pipe 3, a lifting and boosting pump 4, an oil-gas filter 5 and a liquid outlet pipe 6, the liquid inlet pipe 3 being connected to the lifting and boosting pump 4, the oil-gas mixed delivery pump 2 comprising a body 2.1 and a hydraulic end 2.2 integrally arranged with the body 2.1, the body 2.1 being connected to the lifting and boosting pump 4, the hydraulic end 2.2 being connected to the liquid outlet pipe 6, a crankshaft 2.3 being arranged in the body 2.1, and a lifting and boosting pump 4 being connected to the hydraulic end 2.2. The pump 4 includes a pump body 4.1 and a piston rod 4.2. An assembly cavity 4.4 is formed in the pump body 4.1. The axial extension end of the crankshaft 2.3 is arranged in the assembly cavity 4.4. An eccentric wheel 2.4 is arranged on the crankshaft 2.3. The eccentric wheel 2.4 and the piston rod 4.2 are arranged in cooperation. The eccentric wheel 2.4 rotates and reciprocates with the piston rod 4.2 to perform work. The oil and gas sucked from the liquid inlet pipe 3 are pressurized and enter the oil and gas filter 5. After filtering, they enter the hydraulic end 2.2 through the connecting pipe 7 and are discharged from the liquid outlet pipe 6.

[0029] A transmission belt is arranged on one side of the crankshaft 2.3 away from the lifting and boosting pump 4, and the other side of the transmission belt is connected to the electric motor, which provides a power source for the crankshaft 2.3 and the device, making operation convenient.

[0030] A cylinder sleeve 4.5 is installed on the inner wall of the lifting and boosting pump 4, and a retaining ring 4.6 is provided at the lower end of the cylinder sleeve 4.5, and the upper end surface of the retaining ring 4.6 abuts against the lower end surface of the cylinder sleeve 4.5. The piston rod 4.2 is installed between the cylinder sleeves 4.5, and the outer surface of the piston rod 4.2 protrudes toward the cylinder sleeve 4.5 to form a protrusion 4.21, and a sealing block 4.7 is provided on the protrusion 4.21, and the sealing block 4.7 abuts against the inner wall of the cylinder sleeve 4.5; the provided cylinder sleeve 4.5 can support the reciprocating motion of the piston rod 4.2 and reduce the direct friction with the inner wall of the pump body 4.1. The sealing block 4.7 provided on the protrusion 4.21 abuts against the inner wall of the cylinder sleeve 4.5, plays a sealing role, and prevents oil and gas from entering and affecting the crankshaft and other components.

[0031] An inlet valve 8 is arranged on the side of the assembly chamber 4.4 close to the inlet pipe 3, and a first limiting ring 8.4 is arranged on the side of the inlet valve 8 close to the piston rod 4.2. The inlet valve 8 is installed in the assembly chamber 4.4 through the first limiting ring 8.4; the first limiting ring 8.4 arranged on the side of the inlet valve 8 close to the piston rod 4.2 can facilitate the installation of the inlet valve 8, making the installation more stable, and can also prevent the inlet valve 8 from directly contacting the pump body 4.1 for a long time, thereby causing wear and affecting the use effect; and the inlet valve 8 can adjust the size of the oil and gas flow entering the pump body 4.1 as needed.

[0032] A return spring 4.9 is arranged between the liquid inlet valve 8 and the piston rod 4.2. One end of the return spring 4.9 is sleeved on the piston rod 4.2 and abuts against the lower end surface of the matching part, and the other end abuts against the upper end surface of the liquid inlet valve 8. When the long end of the eccentric wheel 2.4 cooperates with the piston rod 4.2, the piston rod 4.2 is pressed down and the return spring 4.9 is compressed. When the long end of the eccentric wheel 2.4 cooperates with the piston rod 4.2, the return spring 4.9 is reset to lift the piston rod 4.2, and the piston rod 4.2 rises. In this way, the piston rod 4.2 realizes reciprocating motion. The return spring 4.9 can help the piston rod 4.2 to reset, so that the piston rod 4.2 can be retracted and retracted next time to achieve the effect of reciprocating motion.

[0033] The liquid inlet valve 8 includes a liquid inlet valve core 8.2 and a liquid inlet valve seat 8.1. Under normal circumstances, the liquid inlet valve seat 8.1 can keep in close contact with the liquid inlet valve core 8.2 and can play a sealing role. The set liquid inlet valve 8 can change the flow rate of the incoming oil and gas according to needs, and the discharge valve can automatically close when the internal pressure is too high to prevent the underground production on site from increasing instantly during an emergency period, which will cause the pressure of the manifold pipeline to suddenly increase and cause an oil burst accident.

[0034] A first flange 8.3 is provided between the liquid inlet valve seat 8.1 and the liquid inlet pipe 3. The provided first flange 8.3 improves the sealing performance of the connection between the liquid inlet pipe 3 and the pump body 4.1 to prevent liquid leakage.

[0035] The liquid inlet valve core 8.2 includes a liquid inlet block 8.21, a liquid inlet spring 8.22 and a liquid inlet top block 8.23. A liquid inlet cavity 8.24 is formed between the liquid inlet top block 8.23 ​​and the liquid inlet block 8.21. The liquid inlet cavity 8.24 is connected to the flow cavity 4.8, and a flow hole 8.25 is provided on the liquid inlet top block 8.23. The flow hole 8.25 is inclined, and the height of the flow hole 8.25 close to the liquid inlet valve seat 8.1 is lower than the height of the side away from the liquid inlet valve seat 8.1, which can facilitate the entry of oil and gas into the liquid inlet cavity 8.24.

[0036] A first limiting ring 8.4 is provided on the side of the liquid inlet block 8.21 close to the piston rod 4.2. The first limiting ring 8.4 is integrated with the liquid inlet block 8.21. The side wall of the first limiting ring 8.4 abuts against the inner wall of the pump body 4.1, and the first limiting ring 8.4 abuts against the end face of the liquid inlet valve seat 8.1 close to the piston rod 4.2. The first limiting ring 8.4 can facilitate the installation of the liquid inlet valve 8, making the installation of the liquid inlet valve core 8.2 and the liquid inlet valve seat 8.1 more secure, and at the same time, it can also prevent the liquid inlet valve 8 from directly contacting the pump body 4.1 for a long time, thereby causing wear and affecting the sealing effect.

[0037] A liquid outlet cavity 4.10 is provided on one side of the pump body 4.1 close to the oil and gas filter 5. The liquid outlet cavity 4.10 is connected to the discharge pipe 4.3, so as to facilitate the discharge of pressurized oil and gas from the pump body 4.1 into the oil and gas filter 5; a second flange 9.4 is provided between the liquid outlet valve 9 and the discharge pipe 4.3, and the second flange 9.4 can improve the sealing performance of the connection between the inlet and outlet liquid cavity 4.10 and the discharge pipe 4.3.

[0038] A liquid outlet valve 9 is installed in the liquid outlet chamber 4.10. The liquid outlet valve 9 includes a liquid outlet valve core 9.1, a liquid outlet valve seat 9.2 and a second limiting ring 9.3. The second limiting ring 9.3 is clamped in the liquid outlet chamber 4.10 and abuts against the side of the liquid outlet valve core 9.1 away from the liquid outlet valve seat 9.2. The second limiting ring 9.3 provided at the end of the discharge valve away from the piston rod 4.2 can prevent the discharge valve from loosening and falling off during use.

[0039] The liquid outlet valve core 9.1 includes a liquid outlet top block 9.11, a liquid outlet spring 9.12 and a liquid outlet block 9.13. One end of the liquid outlet spring 9.12 is against the liquid outlet top block 9.11, and the other end is against the liquid outlet block 9.13. The diameter of the liquid outlet top block 9.11 is smaller than the diameter of the liquid outlet cavity 4.10. A liquid outlet channel 9.15 is formed between the liquid outlet top block 9.11 and the liquid outlet cavity 4.10. A liquid outlet hole 9.14 is provided in the liquid outlet block 9.13. Oil and gas enter the liquid outlet hole 9.14 from the liquid outlet channel 9.15, and the liquid outlet hole 9.14 is connected to the discharge pipe 4.3.

[0040] The oil and gas filter 5 comprises an outer shell 5.1, a partition plate 5.2 and a filter screen 5.3. A mixing chamber 5.4 is formed in the outer shell 5.1. The partition plate 5.2 is arranged in the mixing chamber 5.4, and the partition plate 5.2 divides the mixing chamber 5.4 into a first chamber 5.41 and a second chamber 5.42. The filter screen 5.3 is installed in the first chamber 5.41. A flow port 5.11 is arranged on the outer shell 5.1. The flow port 5.11 is communicated with the drain pipe 4.3, and the drain pipe 4.3 is provided with a balancing valve 5.6 in the mixing chamber 5.4. A liquid outlet 5.12 is arranged in the second chamber 5.42, and the liquid outlet 5.12 is communicated with the connecting pipe 7.

[0041] An inclined baffle 5.5 is arranged in the first chamber 5.41, and the inclined baffle 5.5 is inclinedly arranged in the direction of the flow port 5.11, and a mounting port 5.51 is arranged on the inclined baffle 5.5, and the filter screen 5.3 is mounted on the inclined baffle 5.5 through the mounting port 5.51. The filter screen 5.3 is a cylindrical filter screen with an opening at one end, and the opening of the filter screen 5.3 corresponds to the flow port 5.11, so that the oil and gas can be filtered after entering; a retaining edge 5.31 is arranged on the upper end of the filter screen 5.3, and the retaining edge 5.31 is abutted against the inclined baffle 5.5, so that the filter screen 5.3 can be installed more stably, and the filter screen 5.3 can be prevented from being too heavy when the filter screen 5.3 is filled with oil and gas, resulting in unstable installation.

[0042] A return line 10 is provided between the oil and gas filter 5 and the liquid inlet pipe 3, and a first check valve 10.1 is provided on the return line 10. The return line 10 can allow the oil and gas that are not filtered by the oil and gas filter 5 to flow back into the liquid inlet pipe 3 to continue subsequent operations, and the first check valve 10.1 can ensure that the flow direction of the unfiltered oil and gas is always uniform.

[0043] A bypass pipeline 11 is arranged between the liquid inlet pipe 3 and the liquid outlet pipe 6. The bypass pipeline 11 is provided with a first stop valve 11.1 on the side close to the liquid inlet pipeline, and a second stop valve 11.2 on the side close to the liquid outlet pipeline. When the pressure in the liquid inlet pipe 3 exceeds the liquid outlet pipe 6, the first stop valve 11.1 and the second stop valve 11.2 in the bypass pipeline 11 are opened, and the oil and gas medium directly flows from the liquid inlet pipe 3 to the liquid outlet pipe 6 to prevent the inlet manifold of the reciprocating oil and gas mixed delivery pump 2 from overpressure bursting and oil spraying accidents, and overcome the uneven oil and gas production during the day, and the oil and gas cold transportation can still achieve normal and safe transportation; and a second check valve 11.3 is arranged between the first stop valve 11.1 and the second stop valve 11.2 to prevent backflow in the bypass pipeline 11.

[0044] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An oil-gas mixed transmission pump device capable of cold transmission of oil and gas, characterized in that: The invention comprises a base (1), on which an oil-gas mixed flow pump (2), a liquid inlet pipe (3), a lifting and boosting pump (4), an oil-gas filter (5) and a liquid outlet pipe (6) are installed, wherein the liquid inlet pipe (3) is connected to the lifting and boosting pump (4), and the oil-gas mixed flow pump (2) comprises a body (2.1) and a hydraulic end (2.2) integrally arranged with the body (2.1), wherein the body (2.1) is connected to the lifting and boosting pump (4), and the hydraulic end (2.2) is connected to the liquid outlet pipe (6). The hydraulic end (2.2) is connected to the oil and gas filter (5) via a connecting pipe (7); a crankshaft (2.3) is arranged in the body (2.1); the lift boost pump (4) comprises a pump body (4.1), a piston rod (4.2) and a discharge pipe (4.3); an assembly cavity (4.4) is formed in the pump body (4.1); an axial extension end of the crankshaft (2.3) is arranged in the assembly cavity (4.4); and the crankshaft (2.3) ) is provided with an eccentric wheel (2.4), the eccentric wheel (2.4) being arranged in cooperation with the piston rod (4.2), so that the oil and gas sucked from the liquid inlet pipe (3) are pressurized and enter the oil and gas filter (5) through the liquid discharge pipe (4.3) through the rotation of the eccentric wheel (2.4) and the piston rod (4.2), and then enter the hydraulic end (2.2) through the connecting pipe (7) after being filtered, and then discharged from the liquid outlet pipe (6).

2. The oil-gas mixed transmission pump device capable of cold transmission of oil and gas according to claim 1, characterized in that: The inner wall of the pump body (4.1) is installed with a cylinder sleeve (4.5), the lower end of the cylinder sleeve (4.5) is provided with a retaining ring (4.6), the upper end surface of the retaining ring (4.6) abuts against the lower end surface of the cylinder sleeve (4.5), the piston rod (4.2) is installed between the cylinder sleeves (4.5), the outer surface of the piston rod (4.2) protrudes toward the cylinder sleeve (4.5) to form a convex portion (4.21), and a sealing block (4.7) is provided on the convex portion (4.21), and the sealing block (4.7) abuts against the inner wall of the cylinder sleeve (4.5).

3. The oil-gas mixed transmission pump device capable of cold transmission of oil and gas according to claim 2, characterized in that: A liquid inlet valve (8) is arranged on one side of the assembly cavity (4.4) close to the liquid inlet pipe (3); a flow cavity (4.8) is formed between the liquid inlet valve (8) and the piston rod (4.2); a return spring (4.9) is arranged in the flow cavity (4.8); one end of the return spring (4.9) is sleeved on the piston rod (4.2) and abuts against the lower end surface of the protruding portion (4.21); and the other end abuts against the upper end surface of the liquid inlet valve (8).

4. The oil-gas mixed transmission pump device capable of cold transmission of oil and gas according to claim 3, characterized in that: The liquid inlet valve (8) comprises a liquid inlet valve seat (8.1) and a liquid inlet valve core (8.2); the liquid inlet valve core (8.2) is installed in the liquid inlet valve seat (8.1), and a first flange (8.3) is provided between the liquid inlet valve seat (8.1) and the liquid inlet pipe (3); the liquid inlet valve core (8.2) comprises a liquid inlet abutment block (8.21), a liquid inlet spring (8.22) and a liquid inlet top block (8.23); one end of the liquid inlet spring (8.22) abuts against the liquid inlet top block (8.23), The other end abuts against the liquid inlet block (8.21), a liquid inlet cavity (8.24) is formed between the liquid inlet top block (8.23) and the liquid inlet block (8.21), the liquid inlet cavity (8.24) is connected to the flow cavity (4.8), a flow hole (8.25) connected to the liquid inlet cavity (8.24) is provided on the liquid inlet top block (8.23), and the height of the flow hole (8.25) close to the liquid inlet valve seat (8.1) is lower than the height of the side away from the liquid inlet valve seat (8.1).

5. The oil-gas mixed transmission pump device capable of cold transmission of oil and gas according to claim 4, characterized in that: A first limiting ring (8.4) is provided on the side of the liquid inlet stop block (8.21) close to the piston rod (4.2); the first limiting ring (8.4) and the liquid inlet stop block (8.21) are integrally arranged; the side wall of the first limiting ring (8.4) abuts against the inner wall of the pump body (4.1), and the first limiting ring (8.4) abuts against the end surface of the liquid inlet valve seat (8.1) close to the piston rod (4.2).

6. The oil-gas mixed transmission pump device capable of cold transmission of oil and gas according to claim 1, characterized in that: A liquid outlet cavity (4.10) is arranged on a side of the pump body (4.1) close to the oil and gas filter (5), the liquid outlet cavity (4.10) is communicated with the liquid discharge pipe (4.3), a liquid outlet valve (9) is installed in the liquid outlet cavity (4.10), and a second flange (9.4) is arranged between the liquid outlet valve (9) and the liquid discharge pipe (4.3), the liquid outlet valve (9) comprises a liquid outlet valve core (9.1), a liquid outlet valve seat (9.2) and a second limiting ring (9.3), the second limiting ring (9.3) is clamped and arranged in the liquid outlet cavity (4.10), and abuts against a side of the liquid outlet valve core (9.1) away from the liquid outlet valve seat (9.2); the liquid outlet valve core (9.1) ) comprises a liquid outlet top block (9.11), a liquid outlet spring (9.12) and a liquid outlet block (9.13); one end of the liquid outlet spring (9.12) is against the liquid outlet top block (9.11), and the other end is against the liquid outlet block (9.13); the diameter of the liquid outlet top block (9.11) is smaller than the diameter of the liquid outlet cavity (4.10); a liquid outlet channel (9.15) is formed between the liquid outlet top block (9.11) and the liquid outlet cavity (4.10); a liquid outlet hole (9.14) is provided in the liquid outlet block (9.13); oil and gas enter the liquid outlet hole (9.14) from the liquid outlet channel (9.15); and the liquid outlet hole (9.14) is connected to the discharge pipe (4.3).

7. The oil-gas mixed transmission pump device capable of cold transmission of oil and gas according to claim 1, characterized in that: The oil-gas filter (5) comprises an outer shell (5.1), a partition plate (5.2), and a filter screen (5.3); a mixing chamber (5.4) is formed in the outer shell (5.1); the partition plate (5.2) is arranged in the mixing chamber (5.4); and the partition plate (5.2) divides the mixing chamber (5.4) into a first chamber (5.41) and a second chamber (5.42); the filter screen (5.3) is installed in the first chamber (5.41); a flow port (5.11) is arranged on the outer shell (5.1); the flow port (5.11) is communicated with the drain pipe (4.3); and a balancing valve (5.6) is arranged at the flow port (5.11) and in the mixing chamber (5.4); and a liquid outlet (5.12) is arranged in the second chamber (5.42); and the liquid outlet (5.12) is communicated with the connecting pipe (7).

8. The oil-gas mixed transmission pump device capable of cold transmission of oil and gas according to claim 7, characterized in that: An inclined baffle (5.5) is arranged in the first chamber (5.41), the inclined baffle (5.5) is arranged obliquely in the direction of the flow port (5.11), and a mounting opening (5.51) is arranged on the inclined baffle (5.5), the filter screen (5.3) is mounted on the inclined baffle (5.5) through the mounting opening (5.51), the filter screen (5.3) is a cylindrical filter screen with an opening at one end, a retaining edge (5.31) is arranged on the upper end of the filter screen (5.3), and the retaining edge (5.31) abuts against the inclined baffle (5.5).

9. The oil-gas mixed transmission pump device capable of cold transmission of oil and gas according to claim 1, characterized in that: A return pipeline (10) is provided between the oil-gas filter (5) and the liquid inlet pipe (3), and a first check valve (10.1) is provided on the return pipeline (10).

10. The oil-gas mixed transmission pump device capable of cold transmission of oil and gas according to claim 1, characterized in that: A bypass pipeline (11) is provided between the liquid inlet pipe (3) and the liquid outlet pipe (6); a first stop valve (11.1) is provided on the side of the bypass pipeline (11) close to the liquid inlet pipe (3); a second stop valve (11.2) is provided on the side close to the liquid outlet pipe (6); and a second check valve (11.3) is provided between the first stop valve (11.1) and the second stop valve (11.2).

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