Crude oil heating buffer separation pressurization metering device and process

Abstract

This invention discloses a crude oil heating, buffering, separation, pressurization, and metering device and process, relating to the field of crude oil transportation technology. The heating device, buffering and separating device, incoming oil heating / non-heating pipeline, liquid phase pressurization and metering export pipeline, pipeline to the emergency tank, incoming liquid pressurization and transportation pipeline from the emergency tank, associated gas purification, distribution, metering, and fuel gas pipeline, and condensate recovery pipeline are all integrated on a skid. Because the incoming oil heating / non-heating pipeline, liquid phase pressurization and metering export pipeline, pipeline to the emergency tank, incoming liquid pressurization and transportation pipeline from the emergency tank, associated gas purification, distribution, metering, and fuel gas pipeline, and condensate recovery pipeline are all integrated on the skid, this device can meet the needs of oilfield stations for crude oil heating, gas-liquid buffering and separation, liquid phase pressurization and metering export, gas phase pressurization and metering export, condensate recovery, incoming oil pressurization and export from the emergency tank, and temporary storage of crude oil from the buffering and separating device to the emergency tank. It integrates multiple functions and has high adaptability.

Description

Technical Field

[0001] This invention relates to the field of crude oil transportation technology, and in particular to a crude oil heating, buffering, separation, pressurization, and metering device and process. Background Technology

[0002] The existing integrated oil and gas transportation or oil and gas distribution devices have relatively limited functions and poor adaptability. They can only achieve functions such as heating crude oil, gas-liquid separation, and external transportation of gas and liquid phases. They cannot achieve functions such as metering of liquid and gas phase external transportation, condensate oil recovery, temporary storage of buffer oil during maintenance of the integrated oil and gas transportation device, or pressurization and external transportation of oil from the emergency tank.

[0003] For example, in patent document CN103628857A, the oil supply pipeline to the heating furnace is connected to the external pump pipeline via a bypass pipeline gate valve, and simultaneously connected to a sealed buffer tank via a well group oil supply gate valve. The sealed buffer tank is connected to the external pump pipeline via an external pump gate valve. The sealed buffer tank is connected to an air cooler via a three-way valve I, and the air cooler is connected to an associated gas separator via a three-way valve II. Three-way valve I is also connected to three-way valve II, which can be used as a bypass process. After the associated gas separator is connected to the separator shut-off valve, one path is connected to a gas venting pipeline via a vent shut-off valve, another path is connected to a gas external pipeline via a shut-off valve or a shut-off valve before the flow meter, a gas flow meter, and a shut-off valve after the flow meter, and the third path is connected to the heating furnace gas pipeline via a gas shut-off valve. According to the above structure, this patent can only realize the separation of crude oil and the metered external output of gas and liquid phases, but cannot realize the functions of pressurized external output of gas and liquid phases, condensate oil recovery, temporary storage of buffer oil, and pressurized external output of oil from the emergency tank.

[0004] Therefore, how to improve the comprehensive functionality of oilfield stations so that they can meet the needs of crude oil heating, gas-liquid buffer separation, liquid phase pressurization and metering external transportation, gas phase pressurization and metering external transportation, condensate oil recovery, pressurization and external transportation of oil from emergency tanks, and temporary storage of crude oil from buffer separation units to emergency tanks has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a crude oil heating, buffering, separation, pressurization, and metering device and process to solve the problems existing in the prior art. This device can meet the needs of oilfield stations for crude oil heating, gas-liquid buffering separation, liquid phase pressurization and metering for external transport, gas phase pressurization and metering for external transport, condensate oil recovery, pressurization and external transport of oil from emergency tanks, and temporary storage of crude oil from buffering separation devices to emergency tanks. It integrates multiple functions and has high adaptability.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] The present invention provides a crude oil heating, buffering, separation, pressurization and metering device, wherein a heating device (70), a buffering and separation device (54) and multiple process pipelines are integrated on a skid (52);

[0008] The aforementioned process pipelines include an incoming oil heating / non-heating pipeline, a liquid phase pressurization metering and external transmission pipeline, a pipeline to the emergency tank, an incoming liquid pressurization and transmission pipeline from the emergency tank, an associated gas purification, distribution, metering and fuel gas pipeline, and a condensate oil recovery pipeline.

[0009] One end of the incoming oil heating / non-heating pipeline is connected to the external incoming oil via port a, and the other end of the incoming oil heating / non-heating pipeline is connected to the buffer separation device (54); the incoming oil heating / non-heating pipeline is provided with valve one (1), pressure gauge one (2), valve two (3), pressure transmitter one (4), filter one (6), pressure transmitter two (7), valve four (8), temperature transmitter one (9), and temperature gauge one (10) in sequence along the direction of incoming oil; one pipeline at the outlet of temperature gauge one (10) is connected to an electric control valve. 2 (12) Pressure transmitter 3 (16) is connected to port c of the buffer separation device (54); another pipeline at the outlet of the temperature gauge 1 (10) is connected to the inlet of the crude oil heating coil (84) in the heating device (70) via electric control valve 1 (11). The outlet of the crude oil heating coil (84) is connected in sequence to temperature gauge 2 (13), temperature transmitter 2 (14), and electric control valve 3 (15). The outlet of electric control valve 3 (15) is connected to the inlet of pressure transmitter 3 (16).

[0010] One end of the liquid phase boosting and metering external pipeline is connected to the outlet f of the buffer separation device (54). The liquid phase boosting and metering external pipeline is equipped with a pressure transmitter four (21). One outlet of the pressure transmitter four (21) is sequentially connected to valve six (19), boosting pump one (22), pressure transmitter seven (40), check valve one (26), and valve eight (27). The other outlet of the pressure transmitter four (21) is sequentially connected to valve seven (20), boosting pump two (23), and pressure transmitter eight (42). Check valve 2 (28) and valve 9 (29); the outlets of valve 8 (27) and valve 9 (29) are connected to the inlet of valve 10 (30). The outlet of valve 10 (30) is connected in sequence to pressure transmitter 5 (31), filter 2 (32), liquid flow meter (33), pressure transmitter 6 (35), valve 11 (34), thermometer 3 (39), temperature transmitter 3 (37), pressure gauge 2 (38), and valve 12 (36). The outlet of valve 12 (36) is connected to the liquid outlet g.

[0011] The inlet of the emergency tank pipeline is connected to the outlet f of the buffer separation device (54), the outlet of the emergency tank pipeline is connected to the interface e of the emergency tank pipeline, and the emergency tank pipeline is connected to the electric control valve four (18).

[0012] The inlet of the emergency tank liquid delivery pipeline is connected to the emergency tank liquid. The emergency tank liquid delivery pipeline is provided with valve fourteen (43) and filter three (44) in sequence along the delivery direction. One outlet of filter three (44) is connected to the inlet of the booster pump two (23) via valve sixteen (46), and the other outlet of filter three (44) is connected to the inlet of the booster pump one (22) via valve fifteen (45).

[0013] The inlet of the associated gas purification, distribution, metering, and fuel gas pipeline is connected to the outlet of the buffer separation device (54). Along the gas transmission direction, the associated gas purification, distribution, and fuel gas pipeline is sequentially equipped with a primary gas-liquid separator (55), a temperature transmitter four (58), a valve twenty (61), an associated gas air cooler (62), a temperature transmitter five (64), a valve twenty-two (65), and a secondary gas-liquid separator (67). The outlet of the secondary gas-liquid separator (67) is sequentially connected to a valve twenty-five. (73), pressure transmitter eleven (71), gas flow meter (74), pressure transmitter twelfth (89), valve twenty-six (75), associated gas distribution port m; the outlet of the secondary gas-liquid separation device (67) is connected to the L port of the associated gas heating coil (80) in the heating device (70), the n port of the associated gas heating coil (80) is connected to the burner (83) via valve twenty-eight (82), and the dry gas interface o is connected to the burner (83) via valve twenty-seven (81);

[0014] The outlet of the condensate recovery pipeline is connected to the outlet f of the buffer separation device (54). A condensate recovery pipeline is provided with a drain valve (59). The outlet j of the associated gas air cooler (62) and the outlet k of the secondary gas-liquid separator (67) are both connected to the inlet of valve twenty-three (66). The outlet of valve twenty-three (66) is connected to the inlet of the drain valve (59). A check valve three (47) and a valve seventeen (48) are sequentially provided between the outlet of the drain valve (59) and the outlet f of the buffer separation device (54).

[0015] Preferably, a bypass line 1 is provided between valve 2 (3) and valve 4 (8), and valve 3 (5) is provided on the bypass line 1; a bypass line 2 is provided between valve 10 (30) and valve 11 (34), and valve 13 (41) is provided on the bypass line 2; a bypass line 3 is provided between valve 20 (61) and valve 22 (65), and valve 19 (60) is provided on the bypass line 3; and valve 24 (72) is provided between valve 25 (73) and valve 26 (75).

[0016] Preferably, a safety valve 1 (24) is provided at the outlet of the booster pump 1 (22), and a safety valve 2 (25) is provided at the outlet of the booster pump 2 (23). The vent of the safety valve 1 (24) is connected to the inlet of the booster pump 1 (22), and the vent of the safety valve 2 (25) is connected to the inlet of the booster pump 2 (23). A safety valve 3 (57) is provided at the top of the primary gas-liquid separator (55), and a valve 18 (56) is provided between the safety valve 3 (57) and the primary gas-liquid separator (55). The vent of the safety valve 3 (57) is connected to the vent port i.

[0017] Preferably, the buffer separation device (54) is equipped with a level transmitter (49), a pressure gauge (50), and a pressure transmitter (51); the bottom of the buffer separation device (54) is provided with a drain port d, which is connected to a valve (17).

[0018] Preferably, the heating device (70) is provided with the associated gas heating coil (80), the crude oil heating coil (84), and the hot water heating coil (85). The hot water heating coil (85) is connected to the external pipeline of the device via valve 30 (87) and valve 31 (88). The heating device (70) is provided with the burner (83), temperature transmitter 6 (79), temperature gauge 4 (78), and expansion tank (76). The bottom of the heating device (70) is provided with a drain / water supply port q. The expansion tank (76) is provided with a level transmitter 3 (77). The drain / water supply port q is connected to valve 29 (86).

[0019] The present invention also provides a process flow for applying the above-mentioned crude oil heating, buffering, separation, pressurization, and metering device. The process flow includes a single-pump / dual-pump mode of crude oil heating, buffering, separation, pressurization, and metering external output process, a single-pump / dual-pump mode of crude oil not heating, buffered crude oil to emergency tank process, emergency tank oil pressurization, metering, and external output process, separation associated gas purification, distribution, metering, and external output process, separation associated gas burner gas supply process, and condensate oil recovery process.

[0020] The single / dual pump mode of the crude oil heating, buffering, pressurizing, metering, and export process is as follows: Open valve one (1), valve two (3), valve four (8), electric control valve one (11), electric control valve three (15), valve six (19), valve seven (20), valve eight (27), valve nine (29), valve ten (30), valve eleven (34), and valve twelve (36); close valve three (5), electric control valve two (12), and valve five. (17) Valve Fifteen (45), Valve Sixteen (46), Valve Thirteen (41) and Valve Fourteen (43); the incoming liquid enters through port a, passes through valve one (1), valve two (3), filter one (6), valve four (8) and electric control valve one (11) in sequence, and enters the crude oil heating coil (84) through port p. After being heated by the crude oil heating coil (84), it is discharged from port b, passes through electric control valve three (15) and enters the buffer separation device (54) through port c. After buffer separation, the liquid phase flows out through port f and splits into two paths. One path sequentially passes through valve six (19), booster pump one (22), check valve one (26), valve eight (27), valve ten (30), filter two (32), liquid phase flow meter (33), valve eleven (34), and valve twelve (36) and connects to the liquid phase outlet g. The other path sequentially passes through valve seven (20), booster pump two (23), check valve two (28), and the... Valve 9 (29), Valve 10 (30), Filter 2 (32), Liquid Flow Meter (33), Valve 11 (34), and Valve 12 (36) are connected to the liquid outlet g. When the incoming liquid volume is small and a single pump can meet the transportation requirements, either the booster pump 1 (22) or the booster pump 2 (23) is started to achieve boosted metering and external transportation. When the incoming liquid volume is large and a single pump cannot meet the transportation requirements, booster pump 1 (22) and booster pump 2 (23) are started to achieve boosted metering and external transportation.

[0021] The single / dual pump mode of the crude oil unheated buffer pressurization metering process: Open valve one (1), valve two (3), valve four (8), electric control valve two (12), valve six (19), valve seven (20), valve eight (27), valve nine (29), valve ten (30), valve eleven (34), and valve twelve (36); close valve three (5), electric control valve one (11), electric control valve three (15), valve five (17), valve fifteen (45), valve sixteen (46), valve thirteen (41), and valve fourteen (43); the incoming liquid enters through port a, and sequentially passes through valve one (1), valve two (3), filter one (6), valve four (8), and electric control valve two (12) to connect to port c of the buffer separation device (54). The buffered and separated liquid phase flows out through the outlet f of the buffer separation device (54) and splits into two paths, one... One path connects sequentially through valve six (19), booster pump one (22), check valve one (26), valve eight (27), valve ten (30), filter two (32), liquid flow meter (33), valve eleven (34), and valve twelve (36) to the liquid outlet g; the other path connects sequentially through valve seven (20), booster pump two (23), check valve two (28), valve nine (29), and valve ten (30). The filter 2 (32), the liquid flow meter (33), the valve 11 (34), and the valve 12 (36) are connected to the liquid outlet g. When the incoming liquid volume is small and a single pump can meet the transportation requirements, either the booster pump 1 (22) or the booster pump 2 (23) is started to achieve boosted metering and external transportation. When the incoming liquid volume is large and a single pump cannot meet the transportation requirements, both the booster pump 1 (22) and the booster pump 2 (23) are started simultaneously to achieve boosted metering and external transportation.

[0022] Preferably, the process of buffering crude oil to the emergency tank involves: shutting down the booster pump one (22) and the booster pump two (23), stopping the single / double pump mode of the crude oil heating, buffering, boosting, metering and export process, stopping the single / double pump mode of the crude oil not heating, buffering, boosting, metering and export process, and opening the electric control valve four (18); the liquid phase in the buffer separation device (54) flows out through port f and is transported to the emergency tank at the station.

[0023] The process for pressurizing and metering crude oil from the accident tank is as follows: When transporting crude oil from the accident tank, valve fourteen (43) is opened. When the pressurizing pump one (22) is used to transport crude oil from the accident tank, valve fifteen (45) is opened and valve sixteen (46) and valve six (19) are closed. Crude oil from the accident tank enters through port h and passes through valve fourteen (43), filter three (44), valve fifteen (45) in sequence before entering the pressurizing pump one (22) for pressurization and metering. When the pressurizing pump two (23) is used to transport crude oil from the accident tank, valve sixteen (46) is opened and valve fifteen (45) and valve seven (20) are closed. Crude oil from the accident tank enters through port h and passes through valve fourteen (43), filter three (44), valve sixteen (46) before entering the pressurizing pump two (23) for pressurization and metering.

[0024] Preferably, the process for separating, purifying, distributing, metering, and exporting associated gas is as follows: Valve 19 (60) and Valve 24 (72) are closed; Valve 18 (56), Valve 20 (61), Valve 22 (65), Pressure Transmitter 11 (71), Valve 25 (73), Gas Flow Meter (74), Valve 26 (75), and Pressure Transmitter 12 (89) are opened; the associated gas separated in the buffer separation device (54) passes through the primary gas-liquid separation device (55) and Valve 2... The gas enters the associated gas air cooler (62) for cooling (61). The cooled associated gas discharged from the associated gas air cooler (62) enters the secondary gas-liquid separation device (67) through the valve twenty-two (65) for secondary purification. The associated gas after secondary purification is sequentially transported through the valve twenty-five (73), the pressure transmitter eleven (71), the gas phase flow meter (74), the pressure transmitter twelve (89), and the valve twenty-six (75) to the associated gas distribution metering port m, and is output from the associated gas distribution metering port m.

[0025] The combustion process of the separated associated gas heating for the burner is as follows: When the burner (83) uses associated gas as fuel gas, valve 28 (82) is opened and valve 27 (81) is closed. The separated and purified associated gas enters the associated gas heating coil (80) through port L and is heated. Then it flows out through port n and is transported to the burner (83) through valve 28 (82). When the burner (83) uses dry gas from the plant as fuel gas, valve 28 (82) is closed and valve 27 (81) is opened. The dry gas is transported to the burner (83) through interface o and valve 27 (81).

[0026] The condensate oil recovery process is as follows: Open the drain valve (59), the check valve three (47), and the valve seventeen (48); the condensate oil separated by the associated gas air cooler (62) and the condensate oil separated by the secondary gas-liquid separator (67) are sequentially transported through the drain valve (59), the check valve three (47), and the valve seventeen (48) to the inlet of the booster pump one (22) or the inlet of the booster pump two (23).

[0027] Preferably, when the filter one (6) needs to be cleaned, the valve three (5) is opened and the valve two (3), the filter one (6) and the valve four (8) are closed to carry out inspection and maintenance. After the inspection and maintenance is completed, the filter one (6), the valve two (3) and the valve four (8) are opened and the valve three (5) is closed.

[0028] When it is necessary to clean the filter 2 (32) or the liquid flow meter (33), open the valve 13 (41), close the valve 9 (29), the valve 11 (34), the filter 2 (32) and the liquid flow meter (33) to carry out inspection and maintenance. After the inspection and maintenance is completed, open the valve 9 (29), the valve 11 (34), the filter 2 (32) and the liquid flow meter (33), and close the valve 13 (41).

[0029] When it is necessary to clean the associated gas air cooler (62), open valve nineteen (60), close the associated gas air cooler (62), valve twentieth (61) and valve twenty-two (65) to carry out inspection and maintenance. After the inspection and maintenance is completed, open valve twentieth (61), valve twenty-two (65) and the associated gas air cooler (62), and close valve nineteen (60).

[0030] When the gas flow meter (74) needs to be cleaned, open valve 24 (72), close the gas flow meter (74), valve 25 (73) and valve 26 (75) to carry out maintenance. After the maintenance is completed, open the gas flow meter (74), valve 25 (73) and valve 26 (75), and close valve 24 (72).

[0031] The present invention achieves the following technical effects compared to the prior art:

[0032] This invention integrates a buffer separation device, a heating device, an incoming oil heating / non-heating pipeline, a liquid phase pressurization and metering external transmission pipeline, a pipeline to the emergency tank, an incoming liquid pressurization and transmission pipeline from the emergency tank, an associated gas purification, distribution, and metering pipeline, a fuel gas pipeline, and a condensate recovery pipeline on a skid. This allows the device to meet the needs of oilfield stations for crude oil heating, gas-liquid buffer separation, liquid phase pressurization and metering external transmission, gas phase pressurization and metering external transmission, condensate recovery, incoming oil pressurization and external transmission from the emergency tank, and temporary storage of crude oil from the buffer separation device to the emergency tank. It integrates multiple functions and has high adaptability.

[0033] The technical effects achievable by other technical solutions in this invention are as follows: This invention employs a method where valves two and four are respectively provided on the inlet and outlet sides of filter one, and a bypass pipeline one is provided between valves two and four, with valve three provided on the bypass pipeline one. When filter one is clogged and needs to be cleaned, valves two and four are closed, isolating filter one from the oil pipeline and avoiding mutual contamination between crude oil and filter one, allowing filter one to complete the cleaning work in a short time. At the same time, valve three is opened, allowing crude oil to continue to be transported during the cleaning process of filter one, ensuring the efficiency of crude oil transport. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of a crude oil heating, buffering, separation, pressurization, and metering device that does not have a gas extraction device or a narrow-bore pipeline.

[0036] Figure 2 A schematic diagram of a crude oil heating, buffering, separation, pressurization, and metering device equipped with a gas extraction unit and a reduced-diameter pipeline;

[0037] Figure 3 A schematic diagram of a crude oil heating buffer separation pressurization metering device equipped with a gas extraction unit and a reduced-diameter pipeline, omitting the heating unit;

[0038] Figure 4 A schematic diagram of a crude oil heating, buffer separation, pressurization, and metering device equipped with a gas extraction unit and a reduced-diameter pipeline, omitting the buffer separation unit;

[0039] The components are as follows: 1. Valve 1; 2. Pressure Gauge 1; 3. Valve 2; 4. Pressure Transmitter 1; 5. Valve 3; 6. Filter 1; 7. Pressure Transmitter 2; 8. Valve 4; 9. Temperature Transmitter 1; 10. Temperature Gauge 1; 11. Electric Control Valve 1; 12. Electric Control Valve 2; 13. Temperature Gauge 2; 14. Temperature Transmitter 2; 15. Electric Control Valve 3; 16. Pressure Transmitter 3; 17. Valve 5; 18. Electric Control Valve 4; 19. Valve 6; 20. Valve 7; 21. Pressure Transmitter 4; 22. Booster Pump 1; 23. Booster Pump 2; 24. Safety Valve 1; 25. 26. Safety Valve II; 27. Check Valve I; 28. Valve II; 29. ​​Valve IX; 30. Valve X; 31. Pressure Transmitter V; 32. Filter II; 33. Liquid Flow Meter; 34. Valve XI; 35. Pressure Transmitter VI; 36. Valve XII; 37. Temperature Transmitter III; 38. Pressure Gauge II; 39. Temperature Gauge III; 40. Pressure Transmitter VII; 41. Valve XIII; 42. Pressure Transmitter VIII; 43. Valve XIV; 44. Filter III; 45. Valve XV; 46. Valve XVI; 47. Check Valve III; 48. Valve XVII; 49. Level Transmitter 1. Pressure Gauge 3; 51. Pressure Transmitter 9; 52. Skid; 53. Control Cabinet; 54. Buffer Separation Device; 55. Primary Gas-Liquid Separation Device; 56. Valve 18; 57. Safety Valve 3; 58. Temperature Transmitter 4; 59. Steam Trap; 60. Valve 19; 61. Valve 20; 62. Associated Gas Air Cooler; 63. Valve 21; 64. Temperature Transmitter 5; 65. Valve 22; 66. Valve 23; 67. Secondary Gas-Liquid Separation Device; 68. Pressure Transmitter 10; 69. Level Transmitter 2; 70. Heating Device; 71. Pressure Transmitter 11; 72. Valve 73. Valve 25; 74. Gas flow meter; 75. Valve 26; 76. Expansion tank; 77. Level transmitter 3; 78. Thermometer 4; 79. Temperature transmitter 6; 80. Associated gas heating coil; 81. Valve 27; 82. Valve 28; 83. Burner; 84. Crude oil heating coil; 85. Hot water heating coil; 86. Valve 29; 87. Valve 30; 88. Valve 31; 89. Pressure transmitter 12; 90. Reduced diameter pipeline; 91. Valve 32; 92. Gas extraction device; 93. Valve 33; 94. Valve 34. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] like Figure 1 As shown, the present invention provides a crude oil heating, buffering, separation, pressurization, and metering device. The device includes a buffering and separation device 54, a heating device 70, an incoming oil heating / non-heating pipeline, a liquid phase pressurization and metering external transmission pipeline, a pipeline to the emergency tank, an incoming liquid pressurization and transmission pipeline from the emergency tank, an associated gas purification, distribution, and metering pipeline, a fuel gas pipeline, and a condensate oil recovery pipeline. This integrates functions such as crude oil heating, gas-liquid buffering and separation, liquid phase pressurization and metering external transmission, gas phase pressurization and metering external transmission, incoming oil pressurization and external transmission from the emergency tank, condensate oil recovery, and crude oil temporary storage and transmission from the buffering and separation device to the emergency tank onto the same skid 52, which has strong process adaptability and is easy to prefabricate in the factory.

[0043] The crude oil heating, buffering, separation, pressurization, and metering device mainly consists of a heating device 70, a buffering and separation device 54, a booster pump 22, a booster pump 23, a filter 6, a filter 32, a filter 44, an electric control valve 11, an electric control valve 22, an electric control valve 35, an electric control valve 48, a liquid flow meter 33, a gas flow meter 74, an associated gas air cooler 62, a steam trap 59, a burner 83, process pipelines, instruments, transmitters, valves, and a control cabinet 53. All equipment is installed on a skid 52. The top of the buffer separation device 54 is equipped with a primary gas-liquid separator 55 and a secondary gas-liquid separator 67. The tank of the buffer separation device 54 is equipped with a level transmitter 49, a pressure gauge 50, and a pressure transmitter 51. The bottom of the tank of the buffer separation device 54 is equipped with a drain port d, and a valve 17 is installed at the drain port d. The secondary gas-liquid separator 67 is equipped with a level transmitter 69 and a pressure transmitter 68. The heating device 70 is equipped with a burner 83, and the furnace body of the heating device 70 is equipped with... An expansion tank 76 is installed on the top of the heating device 70, which is equipped with a temperature transmitter 6 79, a temperature gauge 4 78, and a heating device 70. A level transmitter 3 77 is installed on the expansion tank 76. A drain / water inlet q is provided at the bottom of the furnace body of the heating device 70. The drain / water inlet q is equipped with a valve 29 86. The cylinder of the heating device 70 is equipped with an associated gas heating coil 80, a crude oil heating coil 84, and a hot water heating coil 85. The hot water heating coil 85 is connected to the external pipeline of the device through valves 30 87 and 31 88.

[0044] The main process pipelines include incoming oil heating / non-heating pipelines, liquid phase pressurization metering and external transmission pipelines, pipelines to the emergency tank, incoming liquid pressurization and transmission pipelines from the emergency tank, associated gas purification metering and distribution pipelines and fuel gas pipelines, and condensate oil recovery pipelines.

[0045] (1) Oil heating / non-heating pipeline: Oil enters through port a and is connected in sequence to valve 1, pressure gauge 2, valve 3, pressure transmitter 4, filter 6, pressure transmitter 7, and valve 4. A bypass pipeline 1 is installed at filter 6. Valve 3 5 is connected to bypass pipeline 1. Temperature transmitter 9 and temperature gauge 10 are connected to bypass pipeline 1. The pipeline is then split into two paths. One path enters the heating device 70 through port p via electric control valve 11 and is connected to the crude oil heating coil 84 installed in the heating device 70. The other path connects to the pipeline outlet b of the crude oil heating coil 84 inside the heating device 70 via electric control valve 2 12. The pipeline then merges with the pipeline connected to temperature gauge 2 13, temperature transmitter 2 14, and electric control valve 3 15, and then enters the buffer separation device 54 through port c via pressure transmitter 3 16.

[0046] (2) The liquid phase boosting and metering external pipeline, the outlet f of the buffer separation device 54 is connected in sequence to pressure transmitter 51, and then splits into two paths. One path connects to valve 619, boosting pump 122, pressure transmitter 740, check valve 126, valve 827, valve 1030, pressure transmitter 531, filter 22, liquid phase flow meter 33, pressure transmitter 635, valve 1134, thermometer 213, temperature transmitter 337, pressure gauge 213, and valve 1236, and then connects to the liquid phase outlet h; the other path connects to valve 720, boosting pump 223, and pressure... Force transmitter 8 42, check valve 2 28, valve 9 29 are then connected to the outlet metering pipeline to outlet h. Safety valve 1 24 and safety valve 2 25 are installed at the outlets of booster pump 1 22 and booster pump 2 23, respectively. Safety valve 1 24 and safety valve 2 25 release water to the pump inlet pipeline. Filter 2 32 and liquid flow meter 33 of the outlet metering pipeline are equipped with bypass pipeline 2. The inlet of bypass pipeline 2 is connected to the pipeline between valve 8 27 and valve 10 30, and the outlet is connected to the pipeline between valve 11 34 and thermometer 2 13. Valve 13 41 is installed on bypass pipeline 2.

[0047] (3) The outlet f of the buffer separation device 54 is connected to the interface e of the emergency tank pipeline via a pipeline and an electric control valve 18.

[0048] (4) Emergency tank incoming liquid delivery pipeline: The emergency tank incoming liquid is connected through interface h, and then connected to valve 14 43 and filter 3 44 through the pipeline. Then it is divided into two paths: one path is connected to the inlet of booster pump 23 through valve 16 46, and the other path is connected to the inlet of booster pump 1 22 through valve 15 45.

[0049] (5) Associated gas purification and distribution pipeline and fuel gas pipeline: The separated associated gas is separated by the primary gas-liquid separator 55 and then connected to temperature transmitter 4 58, valve 20 61, associated gas air cooler 62, temperature transmitter 5 64, and valve 22 65 via pipeline to enter the secondary gas-liquid separator 67. A safety valve pipeline is installed at the top of the primary gas-liquid separator 55. The inlet of safety valve 3 57 is connected to valve 18 56, and the vent of safety valve 3 57 is connected to vent port 1 via pipeline. A bypass pipeline 3 is installed on the associated gas air cooler 62. The inlet of bypass pipeline 3 is connected to the pipeline between temperature transmitter 4 58 and valve 20 61, and the outlet of bypass pipeline 3 is connected to the inlet pipeline between valve 22 65 and the secondary gas-liquid separator 67. Valve 19 60 is connected to line 3; the associated gas separated by the secondary gas-liquid separation device 67 is divided into two paths via pipeline. One path is connected to pressure transmitter 11 71, valve 25 73, gas flow meter 74, valve 26 75, and then connected to associated gas distribution port m. A bypass line 4 is provided on the gas flow meter 74. The inlet of the bypass line 4 is connected to the front pipeline of pressure transmitter 11 71, and the outlet of the bypass line 4 is connected to the outlet pipeline of the gas flow meter 74. Valve 24 72 is installed on the bypass line 4. The other path enters the associated gas heating coil 80 inside the heating device 70 through port L. After heating, it is connected to valve 28 82 through port n and then connected to the burner 83. The dry gas interface o is connected to the burner 83 via valve 27 81.

[0050] (6) Condensate oil recovery pipeline: The condensate oil discharged from the associated gas air cooler 62 through the drain port j is connected to the drain port k of the secondary gas-liquid separator 67 through the valve 21 63 and the valve 23 66. The condensate oil is then connected to the drain valve 59 through the check valve 3 47 and the valve 17 48. Finally, it flows to the inlet pipeline of the booster pump 1 22 or the booster pump 2 23.

[0051] The control cabinet 53 of the unit is electrically connected to booster pump 1 22, booster pump 2 23, associated gas air cooler 62, liquid flow meter 33, gas flow meter 74, electric control valve 1 11, electric control valve 2 12, electric control valve 3 15, electric control valve 4 18, burner 83, and all transmitters to realize signal acquisition, status monitoring and control, realize frequency conversion control and start-stop control of oil pumps, and realize the switching of process flow of the unit by controlling the status of electric valves.

[0052] The process flow of the crude oil heating, buffering, separation, pressurization, and metering device in this invention includes a crude oil heating, buffering, separation, pressurization, metering, and external output process (single pump / dual pump mode), a crude oil unheated, buffering, separation, separation, pressurization, and metering process (single pump / dual pump mode), a buffered crude oil to emergency tank process, an emergency tank oil pressurization, metering, and external output process, a separated associated gas purification, distribution, metering, and external output process, a separated associated gas burner gas supply process, and a condensate oil recovery process.

[0053] (1) Crude oil heating, buffering, pressurizing, metering, and export process (single pump / dual pump mode): Valves 1-1, 2-3, 4-8, electric control valve 1-11, electric control valve 3-15, 6-19, 7-20, 8-27, 9-29, 10-30, 11-34, and 12-36 are open; Valves 3-5, electric control valve 2-12, 5-17, 15-45, 16-46, 13-41, and 14-43 are closed. The incoming liquid enters through port a, passes through valve 1-1, valve 2-3, filter 1-6, valve 4-8, and electric control valve 1-11, and enters the crude oil heating coil 84 of heating device 70 through port p. After heating, it exits through port b, passes through electric control valve 3-15, and enters the buffer separation device 54 through port c. The liquid phase after buffer separation is then... The liquid flows out from port f and splits into two paths. One path connects to the external outlet g via valve 6 (19), booster pump 1 (22), check valve 1 (26), valve 8 (27), valve 10 (30), filter 2 (32), liquid flow meter 33, valve 11 (34), and valve 12 (36). The other path connects to the external outlet g via valve 7 (20), booster pump 2 (23), check valve 2 (28), valve 9 (29), valve 10 (30), filter 2 (32), liquid flow meter 33, valve 11 (34), and valve 12 (36). When the incoming liquid volume is small and a single pump can meet the conveying requirements, either booster pump 1 (22) or booster pump 2 (23) is started to achieve boosted metering and external conveying. When the incoming liquid volume is large and a single pump cannot meet the conveying requirements, either booster pump 1 (22) or booster pump 2 (23) is started to achieve boosted metering and external conveying.

[0054] (2) Crude oil unheated buffer pressurization metering process (single pump / dual pump mode): Valves 1-1, 2-3, 4-8, electric control valve 2-12, 6-19, 7-20, 8-27, 9-29, 10-30, 11-34, and 12-36 are open; Valves 3-5, 11, 15, 17, 45, 46, 41, and 43 are closed. The incoming liquid enters through port a, passes through valve 1-1, valve 2-3, filter 1-6, valve 4-8, and electric control valve 2-12, and enters the buffer separation device 54 through port c. The buffered and separated liquid phase flows out through port f and splits into two paths. One path connects to the external output port g via valve 6-19, pressurization pump 1-22, check valve 1-26, valve 8-27, valve 10-30, filter 2-32, liquid phase flow meter 33, valve 11-34, and valve 12-36. Another route connects to the external outlet g via valve 2061, booster pump 23, check valve 23, valve 929, valve 1030, filter 232, liquid flow meter 33, valve 1134, and valve 1236. When the incoming liquid volume is small and a single pump can meet the delivery requirements, either booster pump 122 or booster pump 23 can be started to achieve boosted metering and external delivery. When the incoming liquid volume is large and a single pump cannot meet the delivery requirements, booster pump 122 or booster pump 23 can be started to achieve boosted metering and external delivery. The control cabinet can realize variable frequency oil delivery of booster pump 122 and booster pump 23, which can meet the delivery requirements of a wider range of incoming liquids. When it is necessary to clean the filter or repair the flow meter, open the corresponding bypass pipeline valve and close the inlet and outlet valves of the filter and flow meter to achieve maintenance. After maintenance, open the inlet and outlet valves of the filter and flow meter and close the bypass pipeline valve.

[0055] (3) Buffer crude oil to emergency tank process: the liquid phase of the buffer separation device flows out through port f, and the electric control valve 18 is opened to transport crude oil to the station emergency tank. When using this process, the booster pump 22 and booster pump 23 are turned off to stop the booster external transmission process.

[0056] (4) Emergency tank oil supply single pump boosting metering external transmission process: When it is necessary to transport the emergency tank crude oil, valve 14 43 is opened. When the emergency tank crude oil is transported by boosting pump 1 22, valve 15 45 is opened and valve 16 46 and valve 6 19 are closed. The emergency tank crude oil enters through port h, passes through valve 14 43, filter 3 44, valve 15 45, and enters the boosting pump 1 22 for boosting metering external transmission. When the emergency tank crude oil is transported by boosting pump 2 23, valve 16 46 is opened and valve 15 45 and valve 7 20 are closed. The emergency tank crude oil enters through port h, passes through valve 14 43, filter 3 44, valve 16 46, and enters the boosting pump 2 23 for boosting metering external transmission.

[0057] (5) Separate associated gas purification, distribution, metering and external transmission process. Buffer separation device 54 realizes gas-liquid separation. Valve 19 60 and valve 24 72 are closed. Valve 18 56, valve 20 61, valve 22 65, valve 25 73 and valve 26 75 are opened. The separated associated gas enters the associated gas air cooler 62 for cooling through the primary gas-liquid separation device 55 and valve 20 61. It then enters the secondary gas-liquid separation device 67 for secondary purification through valve 22 65. Then, it is connected to the associated gas distribution and metering port m through the pipeline via valve 25 73, gas phase flow meter 74 and valve 26 75. When it is necessary to clean the associated gas air cooler 62 or repair the flow meter, open the corresponding bypass pipeline valve and close the associated gas air cooler 62 and the flow meter inlet and outlet valves to realize maintenance. After the maintenance is completed, open the associated gas air cooler 62 and the flow meter inlet and outlet valves and close the bypass pipeline valve.

[0058] (6) Separation of associated gas heating and combustion process of burner: In addition to metering and distribution, a portion of the separated and purified associated gas is used for combustion in burner 83. The separated and purified associated gas enters the associated gas heating coil 80 in the heating device 70 through port L and is heated. It is then connected to burner 83 through port n via valve 28 82. At this time, valve 28 82 is open and valve 27 81 is closed. When burner 83 uses dry gas from the station to supply fuel gas, valve 28 82 is closed and valve 27 81 is opened. The dry gas enters the pipeline through interface o and is connected to burner 83 through valve 27 81.

[0059] (7) Condensate oil recovery process: The associated gas air cooler 62 cools the associated gas and separates the condensate oil in the associated gas. The secondary gas-liquid separation device 67 performs final purification on the associated gas and also separates the condensate oil. The separated condensate oil enters the drain valve 59, and then is connected to the inlet pipeline of the booster pump 22 or the booster pump 23 via the pipeline, check valve 3 47, and the open valve 17 48. The drain valve 59 can automatically drain the liquid to realize the recovery and transportation of condensate oil.

[0060] The device and process flow of the present invention have the following advantages: (1) The process is more adaptable and the applicable parameter range is wider. One or two specifications of the device can meet the working conditions of the oilfield station.

[0061] (2) The device has a simple structure and is easy to maintain.

[0062] (3) The device is integrated on a skid, which facilitates factory prefabrication.

[0063] (4) Equipped with an intelligent control system to achieve unmanned operation and meet the requirements of digital management.

[0064] Furthermore, the heating device 70 in this invention can also be a heating furnace, a steam heater, a gas heater, an electric heater, a hot oil heater, or other different types of heating devices. Heating elements can also be installed in the corresponding area of ​​the crude oil pipeline (such as the pipeline between the oil inlet pipeline and the buffer separation device 54) to heat the crude oil.

[0065] Specifically, the crude oil heating coil 84 raises the temperature of the crude oil, reduces its viscosity, thereby reducing transport resistance and improving transport efficiency. At the same time, it can prevent water in the crude oil from freezing and forming fixed particles of oil-water mixture due to excessively low external temperatures, which would hinder the flow and transport of crude oil. Furthermore, the heating of the crude oil by the crude oil heating coil 84 can promote the separation of components within the crude oil: for example, under the heating of the crude oil heating coil 84, the solubility of natural gas in the crude oil decreases, and some natural gas will flow out of the crude oil.

[0066] The expansion tank 76 compensates for thermal expansion and contraction caused by temperature changes inside the heating device 70 through its elastic membrane and volume characteristics, thereby maintaining stable pressure and liquid level inside the heating device 70. In this invention, the separation device 54 can specifically be a buffer separation tank, an oil-gas separator, or a pipeline separator installed in a corresponding area of ​​the oil pipeline.

[0067] When the temperature of the incoming oil pipeline is low, such as when transporting crude oil in winter or in a high-altitude environment, the electric control valve 11 and the electric control valve 315 are opened, allowing the crude oil in the incoming oil pipeline to be heated by the heating device 70 before flowing into the buffer separation device 54. Conversely, when the temperature of the incoming oil pipeline is not much different from the ambient temperature, the electric control valve 11 and the electric control valve 315 are closed, and the electric control valve 212 is opened, allowing the crude oil in the incoming oil pipeline to flow directly into the buffer separation device 54 without passing through the heating device 70.

[0068] The associated gas and other gaseous phases, after buffer separation by buffer separation device 54, undergo primary gas-liquid separation by primary gas-liquid separation device 55, cooling by associated gas air cooler 62, and secondary gas-liquid separation by secondary gas-liquid separation device 67. This process separates the small amount of petroleum mixed within the gaseous phase, yielding pure associated gas and other gaseous phases. Depending on the amount of associated gas and other gaseous phases produced, they are fed into associated gas distribution port m or burner 83. When the amount of associated gas and other gaseous phases produced is small, they are only fed into burner 83 to meet the needs of heating device 70. If the amount of associated gas and other gaseous phases produced is large, in addition to feeding them into burner 83, excess associated gas and other gaseous phases are also transported outwards. Burner 83 can heat crude oil heating coil 84, associated gas heating coil 80, and hot water heating coil 85. Furthermore, after the condensate oil in the associated gas air cooler 62 and the secondary gas-liquid separator 67 is separated, it is transported to the outlet of the buffer separator 54 and then pumped out by booster pump 22 or booster pump 23. The associated gas air cooler 62 can also reduce the temperature of the associated gas and other gaseous phases, thereby reducing the corrosion of the pipeline by these phases.

[0069] It should be noted that the pressure transmitters, temperature transmitters, and level transmitters installed throughout this invention can detect pressure, level, or temperature data in real time and upload it to remote control equipment, enabling remote control and real-time monitoring. Meanwhile, the inclusion of pressure gauges and temperature gauges preserves the convenience of on-site operation: operators can directly monitor the pressure and temperature of the pipeline through the readings of the pressure gauges and temperature gauges. Through remote detection and control by the control equipment and on-site detection and control by the operators, pipeline rupture and leakage can be prevented, ensuring the safe operation of the pipeline.

[0070] Furthermore, since crude oil contains some solid particles, these particles will gradually accumulate in the pipeline as the crude oil is transported, affecting the transport of crude oil. Therefore, this invention is equipped with filter 6, filter 32, and filter 44 to effectively intercept solid particles. Meanwhile, to regularly clean and unblock the associated gas air cooler 62, filter 6, filter 32, liquid flow meter 33, and gas flow meter, and to ensure the normal transportation of crude oil, when a large pressure difference is detected between the outlet and inlet of filter 6 through the data from pressure transmitter 4 and pressure transmitter 7, it is determined that filter 6 is blocked and needs to be cleaned. At this time, valve 3 and valve 8 are closed to clean filter 6. The setting of valve 3 and valve 8 avoids the problem that solid particulate matter will continue to enter filter 6 and crude oil will leak from the inlet or outlet of filter 6 if only the inlet or outlet of filter 6 is closed. In addition, in order to ensure that the oil pipeline can still transport oil normally during the cleaning of filter 6, the present invention provides a bypass pipeline 1 between valve 3 and valve 8, and valve 5 is provided on the bypass pipeline 1. When valve 3 and valve 8 are closed, valve 5 is opened, so that crude oil can be transported through the bypass pipeline 1 when filter 6 is being cleaned.

[0071] Similarly, such as Figure 1 As shown, the present invention provides a bypass pipeline 2 between valve 10 30 and valve 11 34, and valve 13 41 is provided on the bypass pipeline 2; when the pressure difference between pressure transmitter 5 31 and pressure transmitter 6 35 indicates that filter 2 32 is blocked, valve 10 30 and valve 11 34 are closed to clean filter 2 32 and liquid flow meter 33, and at the same time valve 13 41 is opened to allow the oil in the pipeline to flow through bypass pipeline 2 to the metering pipeline and then be transported outward.

[0072] It should be noted that the heating device 70 and the separation device 54 in this invention are set up independently. On the one hand, this protects the separation device 54 from the high temperature of the heating device 70, avoiding the problem that the separation of the separation device 54 would be affected by the high temperature of the heating device 70 due to the integrated structure of the two devices, requiring a longer time to complete the gas-liquid separation. This results in a shorter residence time of crude oil in the separation device 54, giving the crude oil a higher transportation efficiency. On the other hand, this keeps the separation device 54 far away from the heating device 70, so that if one device leaks or explodes, it will not affect the other device, thereby reducing the probability of safety accidents.

[0073] In addition to the above, such as Figures 1-4As shown, the present invention includes a conveying pipeline between the outlet of the crude oil heating coil 84 and the buffer separation device 54 within the heating device 70, and a gas extraction device 92 is installed on the conveying pipeline. One outlet of the gas extraction device 92 is connected to the associated gas distribution port m via valve 34 94, and the other outlet is connected to the inlet of the burner 83 via valve 33 93. After the crude oil is heated and flows out from the heating device 70, the gas extraction device 92 promptly extracts some of the associated gas and other gaseous phases that have escaped from the crude oil due to the heating and temperature rise of the heating device 70 (within the range of crude oil conveying temperature and heating temperature, the solubility of associated gas in crude oil decreases with increasing temperature), and according to the amount of associated gas that has escaped, it is introduced into the gas exchange system. If the amount of associated gas escaping from the burner 83 or the associated gas distribution port m is small, it is only introduced into the burner 83; if the amount of associated gas escaping is large, it is introduced into both the burner 83 and the associated gas distribution port m. This avoids the problem that the crude oil flowing out of the heating device 70 has cooled down before entering the buffer separation device 54 due to the long pipeline. This causes the associated gas and other gaseous phases that escaped from the crude oil due to the heating device 70 to re-dissolve into the crude oil. The crude oil will then need to spend a long time in the buffer separation device 54 to achieve the separation of the gas and liquid phases, thus greatly extending the residence time of the crude oil in the buffer separation device 54. This improves the crude oil transportation efficiency and ensures the effectiveness of the heating device 70.

[0074] Furthermore, this invention includes a reduced-diameter pipe 90 on the bypass pipeline, and a valve 32 91 on the reduced-diameter pipe 90. The larger diameter end of the reduced-diameter pipe 90 is connected to the incoming oil pipeline, and the smaller diameter end of the reduced-diameter pipe 90 is connected to the inlet of the crude oil heating coil 84 in the heating device 70. In this way, by reducing the flow area of ​​the pipeline, the crude oil conveying speed is increased, allowing solid particles in the crude oil to be conveyed at a higher speed, avoiding the problem of solid particles accumulating in the pipeline due to low conveying speed, and reducing the probability of pipeline blockage. At the same time, the outlet of the conveying pipeline is connected to the bottom of the buffer separation device 54, and the bottom of the buffer separation device 54 is equipped with a vortex generator or baffle plate to reduce the speed of the crude oil entering the buffer separation device 54, thereby preventing the crude oil entering the buffer separation device 54 from being too fast, causing the stratified gas and liquid phases in the buffer separation device 54 to be subjected to greater impact and remixed, prolonging the residence time of the crude oil in the buffer separation device 54, thus ensuring that this invention has high crude oil conveying efficiency.

[0075] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A crude oil heating, buffering, separation, pressurization, and metering device, characterized in that: The skid integrates a heating device, a buffer separation device, and multiple process pipelines; The aforementioned process pipelines include incoming oil heating and non-heating pipelines, liquid phase pressurization metering and external transmission pipelines, pipelines to the emergency tank, incoming liquid pressurization and transmission pipelines from the emergency tank, associated gas purification, distribution, metering and fuel gas pipelines, and condensate oil recovery pipelines. One end of the incoming oil heating and non-heating pipeline is connected to the external incoming oil via port a, and the other end of the incoming oil heating and non-heating pipeline is connected to the buffer separation device. Along the oil inlet direction, the incoming oil heating and non-heating pipeline is sequentially equipped with valve one, pressure gauge one, valve two, pressure transmitter one, filter one, pressure transmitter two, valve four, temperature transmitter one, and temperature gauge one. One pipeline at the outlet of temperature gauge one is connected to port c of the buffer separation device via electric control valve two and pressure transmitter three. The other pipeline at the outlet of temperature gauge one is connected to the inlet of the crude oil heating coil in the heating device via electric control valve one. The outlet of the crude oil heating coil is sequentially connected to temperature gauge two, temperature transmitter two, and electric control valve three. The outlet of electric control valve three is connected to the inlet of pressure transmitter three. One end of the liquid phase boosting and metering external pipeline is connected to the outlet f of the buffer separation device. The liquid phase boosting and metering external pipeline is equipped with a pressure transmitter four. One outlet of the pressure transmitter four is sequentially connected to valve six, boosting pump one, pressure transmitter seven, check valve one, and valve eight. The other outlet of the pressure transmitter four is sequentially connected to valve seven, boosting pump two, pressure transmitter eight, check valve two, and valve nine. The outlets of valve eight and valve nine are both connected to the inlet of valve ten. The outlet of valve ten is sequentially connected to pressure transmitter five, filter two, liquid phase flow meter, pressure transmitter six, valve eleven, thermometer three, temperature transmitter three, pressure gauge two, and valve twelve. The outlet of valve twelve is connected to the liquid phase outlet g. The inlet of the pipeline to the emergency tank is connected to the outlet f of the buffer separation device, the outlet of the pipeline to the emergency tank is connected to the interface e of the pipeline to the emergency tank, and an electric control valve is provided on the pipeline to the emergency tank. The inlet of the emergency tank liquid delivery pipeline is connected to the emergency tank liquid. The emergency tank liquid delivery pipeline is provided with valve fourteen and filter three in sequence along the delivery direction. One outlet of filter three is connected to the inlet of the booster pump two via valve sixteen, and the other outlet of filter three is connected to the inlet of the booster pump one via valve fifteen. The inlet of the associated gas purification, distribution, metering, and fuel gas pipeline is connected to the outlet of the buffer separation device. Along the gas transmission direction, the associated gas purification, distribution, and fuel gas pipeline is sequentially equipped with a primary gas-liquid separator, a temperature transmitter four, a valve twenty, an associated gas air cooler, a temperature transmitter five, a valve twenty-two, and a secondary gas-liquid separator. A bypass pipeline three is provided between valve twenty and valve twenty-two, and valve nineteen is installed on the bypass pipeline three. One outlet of the secondary gas-liquid separator is sequentially connected to valve twenty-five, a pressure transmitter eleven, a gas phase flow meter, a pressure transmitter twelve, valve twenty-six, and associated gas distribution port m. The other outlet of the secondary gas-liquid separator is connected to port L of the associated gas heating coil in the heating device. Port n of the associated gas heating coil is connected to the burner via valve twenty-eight, and the dry gas interface o is connected to the burner via valve twenty-seven. The outlet of the condensate oil recovery pipeline is connected to the outlet f of the buffer separation device. A condensate oil recovery pipeline is provided with a drain valve. The outlet j of the associated gas air cooler and the outlet k of the secondary gas-liquid separation device are both connected to the inlet of valve twenty-three. The outlet of valve twenty-three is connected to the inlet of the drain valve. A check valve three and a valve seventeen are sequentially provided between the outlet of the drain valve and the outlet f of the buffer separation device.

2. The crude oil heating, buffering, separation, pressurization, and metering device according to claim 1, characterized in that, A bypass line 1 is provided between valve 2 and valve 4, and valve 3 is provided on the bypass line 1; a bypass line 2 is provided between valve 10 and valve 11, and valve 13 is provided on the bypass line 2; valve 24 is provided between valve 25 and valve 26.

3. The crude oil heating, buffering, separation, pressurization, and metering device according to claim 2, characterized in that, Safety valve 1 is provided at the outlet of booster pump 1, and safety valve 2 is provided at the outlet of booster pump 2. The vent of safety valve 1 is connected to the inlet of booster pump 1, and the vent of safety valve 2 is connected to the inlet of booster pump 2. Safety valve 3 is provided at the top of the primary gas-liquid separation device. Valve 18 is provided between safety valve 3 and the primary gas-liquid separation device. The vent of safety valve 3 is connected to vent port i.

4. The crude oil heating, buffering, separation, pressurization, and metering device according to claim 3, characterized in that, The buffer separation device is equipped with a level transmitter, a pressure gauge, and a pressure transmitter; the bottom of the buffer separation device is provided with a drain port d, which is connected to valve 5.

5. The crude oil heating, buffering, separation, pressurization, and metering device according to claim 4, characterized in that, The heating device includes a gas-associated gas heating coil, a crude oil heating coil, and a hot water heating coil. The hot water heating coil is connected to external pipelines via valves 30 and 31. The heating device is equipped with a burner, a temperature transmitter 6, a thermometer 4, and an expansion tank. The bottom of the heating device has a drain port q, and the expansion tank has a level transmitter 3. The drain port q is connected to valve 29.

6. A process flow using the crude oil heating, buffering, separation, pressurization, and metering device as described in claim 5, characterized in that, The process flow includes a single-pump or dual-pump mode of crude oil heating, buffering, separation, pressurization, metering and external transmission process; a single-pump or dual-pump mode of crude oil unheated, buffering, separation, pressurization and metering process; a buffer crude oil to emergency tank process; an emergency tank oil pressurization, metering and external transmission process; a separation associated gas purification, distribution, metering and external transmission process; a separation associated gas burner gas supply process; and a condensate oil recovery process. The crude oil heating, buffering, pressurizing, metering, and export process operates in single-pump or dual-pump mode as follows: Open valves 1, 2, 4, 1 (electric control valve), 3, 6, 7, 8, 9, 10, 11, and 12; close valves 3, 2 (electric control valve), 5, 15, 16, 13, and 14. The incoming liquid enters through port a, passes sequentially through valves 1, 2, 1 (filter), 4, and 1 (electric control valve), and enters the crude oil heating coil through port p. After being heated by the crude oil heating coil, it exits through port b, passes through 3 (electric control valve), and enters the buffer separation device through port c for buffer separation. After separation, the liquid phase flows out through port f and splits into two paths. One path sequentially connects to the liquid phase outlet g via valve six, booster pump one, check valve one, valve eight, valve ten, filter two, liquid phase flow meter, valve eleven, and valve twelve. The other path sequentially connects to the liquid phase outlet g via valve seven, booster pump two, check valve two, valve nine, valve ten, filter two, liquid phase flow meter, valve eleven, and valve twelve. When the incoming liquid volume is small and a single pump can meet the conveying requirements, either booster pump one or booster pump two is activated to achieve boosted metering and external conveying. When the incoming liquid volume is large and a single pump cannot meet the conveying requirements, both booster pump one and booster pump two are activated to achieve boosted metering and external conveying. The crude oil unheated buffer pressurization metering process in single-pump or dual-pump mode: Open valves 1, 2, 4, 2 (electric control valve), 6, 7, 8, 9, 10, 11, and 12; close valves 3, 1, 5, 15, 16, 13, and 14; the incoming liquid enters through port a, sequentially passing through valves 1, 2, 1 (filter), 4, and 2 (electric control valve) and connecting to port c of the buffer separation device. The buffered and separated liquid phase flows out through outlet f of the buffer separation device, splitting into two paths, one of which sequentially passes through… Valve 6, booster pump 1, check valve 1, valve 8, valve 10, filter 2, liquid flow meter, valve 11, and valve 12 are connected to the liquid outlet g; another path connects sequentially to the liquid outlet g via valve 7, booster pump 2, check valve 2, valve 9, valve 10, filter 2, liquid flow meter, valve 11, and valve 12. When the incoming liquid volume is small and a single pump can meet the delivery requirements, either booster pump 1 or booster pump 2 is started to achieve boosted metering and external delivery; when the incoming liquid volume is large and a single pump cannot meet the delivery requirements, both booster pump 1 and booster pump 2 are started simultaneously to achieve boosted metering and external delivery.

7. The process flow of a crude oil heating, buffering, separation, pressurization, and metering device according to claim 6, characterized in that, The process of buffering crude oil to the emergency tank is as follows: shut down the booster pump one and the booster pump two, stop the single pump or double pump mode of the crude oil heating, buffering, boosting, metering and export process, stop the single pump or double pump mode of the crude oil unheating, buffering, boosting, metering and export process, and open the electric control valve four; the liquid phase in the buffer separation device flows out through port f and is transported to the station emergency tank. The single-pump pressurization and metering process for transporting crude oil from the emergency tank is as follows: When transporting crude oil from the emergency tank, valve fourteen is opened. When using the pressurization pump one to transport crude oil from the emergency tank, valve fifteen is opened, and valve sixteen and valve six are closed. The crude oil from the emergency tank enters through port h and passes through valve fourteen, filter three, valve fifteen, and then enters the pressurization pump one for pressurization and metering for external transport. When using the pressurization pump two to transport crude oil from the emergency tank, valve sixteen is opened, and valve fifteen and valve seven are closed. The crude oil from the emergency tank enters through port h and passes through valve fourteen, filter three, valve sixteen, and then enters the pressurization pump two for pressurization and metering for external transport.

8. The process flow of a crude oil heating, buffering, separation, pressurization, and metering device according to claim 6, characterized in that, The associated gas separation, purification, distribution, metering, and external output process is as follows: Close valves 19 and 24; open valves 18, 20, 22, pressure transmitter 11, valve 25, gas flow meter, valve 26, and pressure transmitter 12; the associated gas separated in the buffer separation device enters the associated gas air cooler for cooling via the primary gas-liquid separation device and valve 20; the cooled associated gas discharged from the associated gas air cooler enters the secondary gas-liquid separation device via valve 22 for secondary purification; the associated gas after secondary purification is sequentially transported via valve 25, pressure transmitter 11, gas flow meter, pressure transmitter 12, and valve 26 to the associated gas distribution and metering port m, and output from the associated gas distribution and metering port m. The combustion process of the separated associated gas for heating the burner is as follows: When the burner uses associated gas as fuel, valve 28 is opened and valve 27 is closed. The separated and purified associated gas enters the associated gas heating coil through port L, is heated, and then flows out through port n, and is delivered to the burner through valve 28. When the burner uses dry gas from the plant as fuel, valve 28 is closed and valve 27 is opened. The dry gas is delivered to the burner through interface o and valve 27. The condensate oil recovery process is as follows: Open the drain valve, the check valve three, and the valve seventeen; the condensate oil separated from the associated gas air cooler and the condensate oil separated from the secondary gas-liquid separation device are sequentially transported through the drain valve, the check valve three, and the valve seventeen to the inlet of the booster pump one or the inlet of the booster pump two.

9. The process flow of a crude oil heating, buffering, separation, pressurization, and metering device according to claim 6, characterized in that, When the filter 1 needs to be cleaned, open valve 3 and close valve 2, filter 1 and valve 4 to perform maintenance. After maintenance, open filter 1, valve 2 and valve 4 and close valve 3. When it is necessary to clean the filter 2 or the liquid flow meter, open valve 13 and close valve 9, valve 11, filter 2 and the liquid flow meter to carry out maintenance. After maintenance is completed, open valve 9, valve 11, filter 2 and the liquid flow meter and close valve 13. When the associated gas air cooler needs to be cleaned, open valve 19, close the associated gas air cooler, valve 20, and valve 22 to carry out inspection and maintenance. After the inspection and maintenance is completed, open valve 20, valve 22, and the associated gas air cooler, and close valve 19. When the gas flow meter needs to be cleaned, open valve 24 and close valves 25 and 26 to perform maintenance. After maintenance, open the gas flow meter, valves 25 and 26 and close valve 24.

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