An underwater oil and gas injection device

Abstract

The application discloses an underwater oil and gas injection device and relates to the technical field of oil and gas injection. The device comprises a support structure unit, a gas circuit unit, an oil circuit unit, an electrical unit and a nozzle cabinet unit. The support structure unit comprises a support structure body. The gas circuit unit, the oil circuit unit, the electrical unit and the nozzle cabinet unit are fixedly arranged on the support structure body. The gas circuit unit is used for sending compressed air to the underwater through a pipeline. The oil circuit unit is used for sending oil samples to the underwater through an oil pipeline. The electrical unit is electrically connected with the gas circuit unit and the oil circuit unit respectively. The nozzle cabinet unit is used for storing underwater gas injection nozzles and oil injection nozzles. The device can separately complete underwater oil injection or underwater gas injection, can simultaneously realize underwater oil injection and gas injection, and can precisely control and adjust the leakage flow. The device is used for simulating different situations of seabed oil and gas pipeline leakage, thereby detecting and scientifically researching target characteristics of the leakage.

Description

Technical Field

[0001] This invention relates to the field of oil and gas injection technology, and more specifically to an underwater oil and gas injection device. Background Technology

[0002] In recent years, human attention to the ocean has been increasing, and the focus of marine exploration and resource development has gradually shifted to the exploration, extraction, and development of mineral resources, primarily marine oil and gas. In the development of marine oil and gas resources, subsea oil and gas pipelines are the most important transportation channels. my country currently has over 6,000 kilometers of subsea pipelines. Due to the combined effects of external environmental conditions such as seabed changes, shipping channels, and currents, as well as human factors such as trawl interference and anchoring, oil and gas transportation can easily be interrupted or leaked, directly impacting economic development and environmental protection. Furthermore, subsea oil and gas leakage is a natural phenomenon in the marine environment, especially in situations where rich energy resources such as oil or natural gas may be present beneath the seabed sedimentary layers. Moreover, the target for oil and gas detection may only contain oil, gas, or both simultaneously. Therefore, all engineering activities involving marine resource development and marine environmental safety assurance related to marine oil and gas require the detection and scientific research of the characteristics of underwater leaked materials.

[0003] However, in studies of subsea and oil and gas pipeline leaks, the timing and circumstances of actual leaks are often uncontrollable. Therefore, underwater oil and gas injection devices are typically needed to simulate subsea oil and gas pipeline leaks during scientific experiments. Existing devices often can only perform gas or oil injection individually, and cannot perform both functions simultaneously. Summary of the Invention

[0004] The main objective of this invention is to provide an underwater oil and gas injection device to solve the problems in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An underwater oil and gas injection device includes a support structure unit, an air circuit unit, an oil circuit unit, an electrical unit, and a nozzle cabinet unit. The support structure unit includes a support structure body. The air circuit unit, the oil circuit unit, the electrical unit, and the nozzle cabinet unit are all fixedly mounted on the support structure body. The air circuit unit is used to deliver compressed air to the underwater environment through a pipeline. The oil circuit unit is used to deliver oil samples to the underwater environment through an oil delivery pipeline. The electrical unit is electrically connected to both the air circuit unit and the oil circuit unit. The nozzle cabinet unit is used to store the underwater air injection nozzle and the oil injection nozzle.

[0007] Furthermore, the supporting structure includes a base plate and a supporting frame, with rollers provided at the bottom of the base plate and the supporting frame fixedly mounted on the top of the base plate.

[0008] Furthermore, the air circuit unit includes an air compressor, a refrigerated dryer, a gas flow meter, and a quick-connect gas injection connector. The air compressor is fixedly installed on the base plate. The air outlet of the air compressor is connected to the air inlet of the refrigerated dryer through a first gas injection pipe. The refrigerated dryer is fixedly installed on the top of the support frame. The air outlet of the refrigerated dryer is connected to the gas flow meter through a second gas injection pipe. The gas flow meter is installed inside the gas flow meter cabinet at the top of the nozzle cabinet unit. The air outlet of the gas flow meter is connected to the quick-connect gas injection connector through a third gas injection pipe. The quick-connect gas injection connector is connected to the underwater gas injection nozzle through a gas injection hose.

[0009] Furthermore, the first air injection pipe is provided with a first air valve, a second air valve, a third air valve, and a refrigerated dryer inlet filter in sequence from the air compressor end to the refrigerated dryer end; the second air injection pipe is provided with a refrigerated dryer outlet filter, a fourth air valve, a sixth air valve, a gas flow regulating valve, and a needle valve in sequence from the refrigerated dryer end to the gas flow meter end; the third air injection pipe is provided with an air injection solenoid valve, a gas pressure sensor, a seventh air valve, and a gas check valve in sequence from the gas flow meter end to the air injection quick connector end; and drain valves are provided at the bottom of both the refrigerated dryer inlet filter and the refrigerated dryer outlet filter.

[0010] Furthermore, a drain valve is provided at one end of the refrigerated dryer near the air outlet filter, and a water collection bottle is provided on the support frame near the refrigerated dryer. The water collection bottle is connected to the drain valve through a drain pipe.

[0011] Furthermore, the outlet end of the fourth air valve is connected to a three-way air valve. One outlet end of the three-way air valve is connected to the sixth air valve, and the other outlet end is connected to an exhaust pipe. The exhaust pipe is provided with a fifth air valve and an exhaust port at the end away from the three-way air valve.

[0012] Furthermore, the oil circuit unit includes an oil tank, an oil pump, an oil flow meter, and a quick-connect oil injection connector mounted on the base plate. An oil level sensor and an oil temperature sensor are installed at the bottom of the oil tank. The oil outlet of the oil tank is connected to the oil pump through a first oil injection pipeline. The oil outlet of the oil pump is connected to the oil flow meter through a second oil injection pipeline. The oil outlet of the oil flow meter is connected to the quick-connect oil injection connector through a third oil injection pipeline. The quick-connect oil injection connector is connected to an underwater oil injection nozzle through an oil injection hose.

[0013] Furthermore, the first oil injection pipeline is provided with a second oil valve and a third oil valve in sequence from one end of the oil tank to one end of the oil pump; the second oil injection pipeline is provided with an electric ball valve, a fourth oil valve and an oil flow meter in sequence from one end of the oil pump to one end of the oil flow meter; the third oil injection pipeline is provided with an oil check valve, a fifth oil valve, an oil pressure sensor and a sixth oil valve in sequence from one end of the oil flow meter to one end of the oil injection quick connector; the outlet end of the second oil valve is connected to an oil three-way valve, one oil outlet end of the oil three-way valve is connected to the third oil valve, and the other oil outlet end is connected to a drain pipe, and the end of the drain pipe away from the oil three-way valve is provided with a first oil valve and a drain port in sequence.

[0014] Furthermore, the electrical unit includes an electrical control cabinet, a power junction box, a wiring duct, and an underwater nozzle junction box. The electrical control cabinet is located on the top of the support frame, the power junction box is installed on the side of the electrical control cabinet, the wiring duct and the nozzle junction box are fixedly mounted on the top of the base plate by mounting brackets, the power junction box is used to connect to an external power source, and the electrical control cabinet, the wiring duct and the underwater nozzle junction box are connected by conduit.

[0015] Furthermore, the nozzle cabinet unit includes a nozzle cabinet disposed on top of the support frame, a temporary parts box at the bottom of the nozzle cabinet, and a gas flow meter cabinet disposed on top of the nozzle cabinet.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention can perform underwater oil or gas injection alone, or simultaneously, and can precisely control and adjust the leakage flow rate to simulate different scenarios of subsea oil and gas pipeline leaks, thereby enabling the detection and scientific research of the characteristics of the leaked material. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the present invention from another angle.

[0020] Figure 3 This is a schematic diagram of the electrical unit structure of the present invention.

[0021] Figure 4 This is a schematic diagram of the gas path unit structure of the present invention.

[0022] Figure 5 This is a schematic diagram of the air compressor section of the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of the refrigerated dryer of the present invention.

[0024] Figure 7 This is a schematic diagram of the structure of the gas flow meter of the present invention.

[0025] Figure 8 This is a schematic diagram of the structure of the quick-connect gas injection connector of the present invention.

[0026] Figure 9 This is a schematic diagram of the oil circuit unit structure of the present invention.

[0027] Figure 10 This is a schematic diagram of the structure of the oil tank in this invention.

[0028] Figure 11 This is a schematic diagram of the structure of the oil pump in this invention.

[0029] Figure 12 This is a schematic diagram of the structure of the oil flow meter of the present invention.

[0030] Figure 13 This is a schematic diagram of the structure of the quick-connect oil filling connector of the present invention.

[0031] Figure 14 This is a schematic diagram of the nozzle cabinet unit structure of the present invention.

[0032] Among them, 1-support structure unit, 11-base plate, 12-support frame, 13-roller, 2-air circuit unit, 21-air compressor, 22-refrigerated dryer, 221-drain valve, 222-water collection bottle, 23-gas flow meter, 24-injection quick connector, 25-first injection pipe, 251-first air valve, 252-second air valve, 253-third air valve, 254-refrigerated dryer inlet filter, 26-second injection pipe, 261-refrigerated dryer outlet filter, 262-fourth air valve, 263-sixth air valve, 264-gas flow regulating valve, 265-needle valve, 27-third injection pipe, 271-injection solenoid valve, 272-gas pressure sensor, 273-seventh air valve, 274-gas check valve, 28-exhaust pipe, 281- Fifth gas valve, 3-oil circuit unit, 31-oil tank, 311-oil level sensor, 32-oil pump, 33-oil flow meter, 34-oil injection quick connector, 35-first oil injection pipeline, 351-second oil valve, 352-third oil valve, 36-second oil injection pipeline, 361-electric ball valve, 362-fourth oil valve, 363-oil quantity regulating valve, 37-third oil injection pipeline, 371-oil check valve, 372-fifth oil valve, 373-oil pressure sensor, 374-sixth oil valve, 38-oil drain pipe, 381-first oil valve, 4-electrical unit, 41-electrical control cabinet, 42-power junction box, 43-cable tray, 44-underwater nozzle junction box, 5-nozzle cabinet unit, 51-nozzle cabinet, 52-temporary parts box, 53-gas flow meter cabinet. Detailed Implementation

[0033] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] Example 1

[0035] Combination Figures 1 to 14 This embodiment provides an underwater oil and gas injection device, including a support structure unit 1, an air circuit unit 2, an oil circuit unit 3, an electrical unit 4, and a nozzle cabinet unit 5. The support structure unit includes a support structure body. The air circuit unit 2, the oil circuit unit 3, the electrical unit 4, and the nozzle cabinet unit 5 are all fixedly mounted on the support structure body. The air circuit unit 2 is used to send compressed air to the underwater environment through a pipeline. The oil circuit unit 3 is used to send oil samples to the underwater environment through an oil delivery pipeline. The electrical unit 4 is electrically connected to the air circuit unit 2 and the oil circuit unit 3 respectively. The nozzle cabinet unit 5 is used to store the underwater air injection nozzle and the oil injection nozzle.

[0036] The underwater oil and gas injection device in this embodiment is a set of devices for injecting oil and gas underwater. When in use, it can inject oil underwater alone, inject gas underwater alone, or inject oil and gas underwater simultaneously, so as to simulate the leakage of subsea oil and gas pipelines, thereby conducting detection and scientific research on the characteristics of the leaked material.

[0037] In this embodiment, the supporting structure is used to support the entire device, including a base plate 11 and a supporting frame 12. The supporting frame 12 is fixedly installed on the top of the base plate 11. Preferably, the bottom of the base plate 11 is provided with rollers 13, which can facilitate the movement of the entire device to the required installation position.

[0038] In this embodiment, the electrical unit 4 includes an electrical control cabinet 41, a power junction box 42, a wiring trough 43, and an underwater nozzle junction box 44. The electrical control cabinet 41 is disposed on the top of the support frame 12, the power junction box 42 is installed on the side of the electrical control cabinet 41, the wiring trough 43 and the nozzle junction box are fixedly disposed on the top of the base plate 11 by mounting brackets, and the electrical control cabinet 41, the wiring trough 43 and the underwater nozzle junction box 44 are connected by conduit.

[0039] Specifically, the power junction box 42 is used to connect to an external power source, the cable tray 43 is used to collect the power lines and signal lines of each actuator, the underwater nozzle junction box is used to connect to the power lines of the underwater air injection nozzle and oil injection nozzle, and the electrical control cabinet 41 is used for the overall control of the device operation, and contains switches, PLC and other electrical accessories.

[0040] Preferably, the outer side of the electrical control cabinet 41 in this embodiment is provided with a control cabinet panel, which is provided with a power indicator light, a PLC touch screen, an oil flow adjustment knob, an oil flow meter display, an air injection button, an oil nozzle rotation start button, an oil nozzle rotation speed adjustment button, an oil nozzle rotation adjustment button, an air nozzle rotation start button, an air nozzle rotation speed adjustment button, an air nozzle rotation adjustment button, and a door switch lock for the electrical control cabinet 41.

[0041] Specifically, the power indicator light illuminates when the main power switch is on and goes out when the main power switch is off; the PLC touchscreen can be operated with a stylus as needed, entering working mode when the main power switch and main control switch are turned on; the oil flow adjustment knob is used to manually adjust the flow rate of the oil sample in the oil pipeline, rotating counterclockwise decreases the flow rate, and rotating clockwise increases the flow rate; the oil flow meter display is used to display the real-time flow rate of the oil sample in the oil pipeline; when the air injection button is used, it starts the solenoid valve to quickly inject air underwater, pressing it once opens the solenoid valve to inject air underwater, and pressing it again closes the solenoid valve to stop injecting air underwater; the oil nozzle rotation on / off button is the power control button for the underwater oil injection rotary nozzle, pressing it once turns on the power to the underwater oil injection rotary nozzle, and pressing it again turns off the power to the underwater oil injection rotary nozzle; the oil nozzle rotation speed control knob is the rotation speed control knob for the underwater oil injection rotary nozzle, which is adjusted according to the real-time rotation speed of the underwater oil injection rotary nozzle observed by the underwater camera. The underwater oil nozzle rotation adjustment button controls the rotation speed for precise positioning. Pressing the button activates the underwater oil injection rotary nozzle for forward and reverse rotation; releasing the button stops the nozzle. The air nozzle rotation on / off button controls the power to the underwater air injection rotary nozzle; pressing it once turns it on, and pressing it again turns it off. The air nozzle rotation speed control button controls the rotation speed of the underwater air injection rotary nozzle. Based on real-time observation of the underwater air injection rotary nozzle's rotation speed using the underwater camera, the rotation speed is controlled for precise positioning. The air nozzle rotation adjustment button controls the forward and reverse rotation of the underwater air injection rotary nozzle; pressing the button activates the nozzle for forward and reverse rotation, releasing the button stops the nozzle. When using the 41-door switch lock in the electrical control cabinet, pull the latch upwards from below the lock, then turn it to the left to open the cabinet door. To lock the door, reset the lock.

[0042] In this embodiment, the air circuit unit 2 includes an air compressor 21, a refrigerated dryer 22, a gas flow meter 23, and a quick-connect gas injection connector 24. The air compressor 21 is fixedly installed on the base plate 11. The outlet of the air compressor 21 is connected to the inlet of the refrigerated dryer 22 through a first gas injection pipe 25. The refrigerated dryer 22 is fixedly installed on the top of the support frame 12. The outlet of the refrigerated dryer 22 is connected to the gas flow meter 23 through a second gas injection pipe 26. The gas flow meter 23 is installed inside the gas flow meter cabinet 53 on the top of the nozzle cabinet unit 5. The outlet of the gas flow meter 23 is connected to the quick-connect gas injection connector 24 through a third gas injection pipe 27. The quick-connect gas injection connector 24 is connected to the underwater gas injection nozzle through a gas injection hose.

[0043] Preferably, the first air injection pipe 25 is provided with a first air valve 251, a second air valve 252, a third air valve 253 and a refrigerated dryer inlet filter 254 in sequence from one end of the air compressor 21 to one end of the refrigerated dryer 22. The second air injection pipe 26 is provided with a refrigerated dryer outlet filter 261, a fourth air valve 262, a sixth air valve 263, a gas flow regulating valve 264 and a needle valve 265 in sequence from one end of the refrigerated dryer 22 to one end of the gas flow meter 23. The third air injection pipe 27 is provided with an air injection solenoid valve 271, a gas pressure sensor 272, a seventh air valve 273 and a gas check valve 274 in sequence from one end of the gas flow meter 23 to one end of the air injection quick connector 24. The bottom of the refrigerated dryer inlet filter 254 and the refrigerated dryer outlet filter 261 are both provided with drain valves.

[0044] Preferably, a drain valve 221 is provided at one end of the refrigerated dryer 22 near the air outlet filter 261 of the refrigerated dryer, and a water collection bottle 222 is provided on the support frame 12 near the refrigerated dryer 22. The water collection bottle 222 is connected to the drain valve 221 through a drain pipe.

[0045] Preferably, the outlet end of the fourth air valve 262 is connected to a three-way air valve. One outlet end of the three-way air valve is connected to the sixth air valve 263, and the other outlet end is connected to an exhaust pipe 28. The exhaust pipe 28 is provided with a fifth air valve 281 and an exhaust port at the end away from the three-way air valve.

[0046] Specifically, the air compressor 21 is used as the air source, and the main function of the refrigerated air dryer 22 is to remove moisture and some particulate impurities from the compressed air to ensure the normal operation of the gas flow meter 23 in the downstream section. During operation, the compressed air enters the inlet filter of the refrigerated air dryer 22 through the third air valve 253. After removing some moisture and particulate impurities, it enters the refrigerated air dryer 22 and is cooled and dried. The dried air then passes through two outlet filters 261 to further remove impurities before being sent to the air flow meter or exhaust port through the fourth air valve 262. During this process, condensate in the air flows into the drain collection bottle 222 of the refrigerated air dryer 22 through the drain valve 221, and is then manually emptied. After a period of operation, the bottom drain valves of the inlet filter and outlet filter of the refrigerated air dryer 22 are opened to drain the condensate. The purified compressed air, after removing moisture and impurities, passes through the sixth air valve 263 (at this time, the fifth air valve 281 is closed, and the first air valve 251, the second air valve 252, the third air valve 253, and the fourth air valve 262 are open). The pressure is then adjusted to a suitable value by the pressure regulating valve, and after passing through the needle valve 265, it enters the gas flow meter 23. The air coming out of the gas flow meter 23 passes through the air injection solenoid valve 271, the air pressure sensor 272, the seventh air valve 273, and the gas check valve 274. Finally, the air is injected into the underwater air injection nozzle through the air injection hose connected to the air injection quick connector 24, and finally injected into the water through the air injection nozzle.

[0047] The drain valve 221 of the refrigerated dryer 22 has the function of switching on and off and regulating the amount of condensate water in the refrigerated dryer 22. It can be adjusted according to the specific operating conditions on site. The condensate water will be discharged into the water collection bottle 222 of the refrigerated dryer 22 through the drain pipe. When enough water has been collected, the water is manually emptied and the water collection bottle 222 is reset. To ensure that high-quality compressed air enters the gas flow meter 23, within 15 minutes after the refrigerated dryer 22 is turned on, the fifth air valve 281 is opened (at this time, the first air valve 251, the second air valve 252, the third air valve 253 and the fourth air valve 262 are already in the open state), and the air is vented through the exhaust port. After the refrigerated dryer 22 has been running for 15 minutes, the fifth air valve 281 is closed, and then the sixth air valve 263 is opened to introduce clean compressed air into the gas flow meter 23. The needle valve 265 is designed to prevent the high pressure caused by sudden valve opening from impacting the measuring element in the gas flow meter 23. During use, the needle valve 265 should be opened slowly. The gas flow meter 23 is used to control and measure the air flow rate during injection in real time, and the real-time gas flow rate measurement value will be recorded by the PLC. The injection solenoid valve 271 is used for rapid initiation of underwater air injection. The air pressure sensor 272 is used to measure the pressure of the air injected underwater in real time, and the real-time air pressure measurement value will be recorded in the PLC. The gas check valve 274 prevents excessive underwater pressure from causing water to flow back into the gas pipeline.

[0048] In this embodiment, the oil circuit unit 3 includes an oil tank 31, an oil pump 32, an oil flow meter 33, and an oil injection quick connector 34 disposed on the base plate 11. An oil level sensor 311 and an oil temperature sensor are installed at the bottom of the oil tank 31. The oil outlet of the oil tank 31 is connected to the oil pump 32 through a first oil injection pipeline 35. The oil outlet of the oil pump 32 is connected to the oil flow meter 33 through a second oil injection pipeline 36. The oil outlet of the oil flow meter 33 is connected to the oil injection quick connector 34 through a third oil injection pipeline 37. The oil injection quick connector 34 is connected to an underwater oil injection nozzle through an oil injection hose.

[0049] Preferably, the first oil filling pipeline 35 is provided with a second oil valve 351 and a third oil valve 352 in sequence from one end of the oil tank 31 to one end of the oil pump 32; the second oil filling pipeline 36 is provided with an electric ball valve 361, a fourth oil valve 362 and an oil flow meter 33 in sequence from one end of the oil pump 32 to one end of the oil flow meter 33; the third oil filling pipeline 37 is provided with an oil check valve 371, a fifth oil valve 372, an oil pressure sensor 373 and a sixth oil valve 374 in sequence from one end of the oil flow meter 33 to one end of the oil filling quick connector 34; the outlet end of the second oil valve 351 is connected to an oil three-way valve, one oil outlet end of the oil three-way valve is connected to the third oil valve 352, and the other oil outlet end is connected to an oil drain pipe 38, the end of the oil drain pipe 38 away from the oil three-way valve is provided with a first oil valve 381 and an oil drain port in sequence.

[0050] Specifically, in this embodiment, the oil tank 31 contains the oil sample to be tested, with an internal volume of approximately 3.8 liters. The first oil valve 381 and the oil drain port are used to drain the remaining oil sample in the oil tank 31 after the experiment. The second oil valve 351 is used to shut off the oil flow to the pipeline in the oil tank 31. The third oil valve 352 is used to close the oil circuit when repairing components. The oil temperature sensor at the bottom of the oil tank 31 can measure the temperature of the oil sample in the oil tank 31 in real time. The oil level sensor 311 at the bottom of the oil tank 31 can measure the liquid level of the oil sample in the oil tank 31 in real time. When the liquid level drops to the low limit, the PLC will instruct the oil pump 32 to shut down and the electric ball valve 361 to close.

[0051] During operation, oil pump 32 is activated to provide power to draw oil samples from oil tank 31. The oil flows through the first injection line 35 and the second injection line 36 to the oil flow meter 33. The flow meter 33 controls the oil flow rate in the oil circuit, and the oil then flows through the third injection line 37 to the quick-connect injection connector 34. Subsequently, the oil flows through the injection hose connected to the quick-connect connector 34 to the underwater injection nozzle, and finally, the oil is sprayed into the water from the injection nozzle. During this process, the electric ball valve 361 opens slowly when oil pump 32 is activated to prevent excessive impact on downstream components from the high oil pressure generated when oil pump 32 is first activated. The opening and closing of the electric ball valve 361 is automatically controlled and linked to the start and stop of oil pump 32 by a PLC. The fourth oil valve 362 is used to shut down the pipeline components during maintenance. The oil flow regulating valve 363 is used to accurately regulate the oil flow rate in the pipeline. The measurement signal from the oil flow meter 33 is fed back to the PLC, which then issues a command to the oil flow regulating valve 363 to control the oil flow rate in the oil circuit. The oil flow meter 33 is used to measure the oil flow rate in the oil pipeline in real time, and its real-time oil flow measurement value will be recorded in the PLC. The oil check valve 371 is used to prevent high-pressure water from entering the oil pipeline. The fifth oil valve 372 is used to cut off the oil circuit during component maintenance. The air pressure sensor 272 is used to measure the pressure of the oil injected underwater in real time, and the real-time oil pressure measurement value will be recorded by the PLC. The sixth oil valve 374 is used to close the oil circuit during non-experimental periods.

[0052] In this embodiment, the nozzle cabinet unit 5 includes a nozzle cabinet 51 disposed on the top of the support frame 12, a temporary parts box 52 at the bottom of the nozzle cabinet, and a gas flow meter cabinet 53 disposed on the top of the nozzle cabinet. The gas flow meter cabinet 53 is used to protect the gas flow meter 23, and the temporary parts box 52 is used to temporarily store some small parts, such as pipe plugs and nozzle silicone plugs.

[0053] Specifically, the nozzle cabinet contains 21 gas nozzles and 6 oil nozzles, each labeled above its own. Each nozzle has a silicone plug at the rear. When using a nozzle, the silicone plug must be removed and placed in the temporary parts box 52. After use, the silicone plug is inserted back into the nozzle from the temporary parts box 52 and then into the corresponding nozzle orifice.

[0054] Example 2

[0055] This embodiment provides specific methods for gas injection and oil injection of an underwater oil and gas injection device.

[0056] The specific steps of the gas injection operation are as follows:

[0057] (1) Connect the air injection hose and the air injection nozzle to the air injection quick connector 24;

[0058] (2) Open the first air valve 251, the second air valve 252, the third air valve 253, the fourth air valve 262 and the fifth air valve 281;

[0059] (3) Turn on the main power supply, air compressor 21, gas flow meter 23, main control and nozzle air switch;

[0060] (4) Turn on the power switch of the refrigerated dryer 22;

[0061] (5) After the refrigerated dryer 22 has been running for more than 15 minutes, close the fifth air valve 281 and open the sixth air valve 263;

[0062] (6) Use the air volume pressure regulating valve to adjust the inlet pressure to 0.2MPa;

[0063] (7) Use a stylus to tap the pneumatic circuit interface on the PLC touch screen;

[0064] (8) Open the seventh gas valve 273;

[0065] (9) Slowly open needle valve 265;

[0066] (10) Press the gas injection button to inject gas underwater. At this time, the real-time gas flow rate and gas pressure value will be displayed on the PLC touch screen interface. These parameter values ​​will be recorded in the PLC in real time.

[0067] (12) After the experiment is completed, turn off the air compressor 21, gas flow meter 23 and nozzle air switch.

[0068] (13) Turn off switch 22 of the refrigerated dryer;

[0069] (14) Close needle valve 265;

[0070] (15) Close the first air valve 251, the second air valve 252, the third air valve 253, the fourth air valve 262, and the fifth air valve 281;

[0071] (16) Export data;

[0072] (17) Turn off the main control and main power air switches in sequence.

[0073] II. The specific steps of the gas injection operation are as follows:

[0074] (1) Connect the oil injection hose and the oil injection nozzle to the oil injection quick connector 34;

[0075] (2) Close the first oil valve 381 and open the second oil valve 351, the third oil valve 352, the fourth oil valve 362, the fifth oil valve 372 and the sixth oil valve 374;

[0076] (3) Turn on the main power supply, oil pump 32, main control and nozzle switch;

[0077] (4) Manually open the oil tank 31 cover on the oil tank 31 and add a certain amount of oil sample;

[0078] (5) Use the stylus to click the start button of oil pump 32;

[0079] (6) Manually rotate the oil flow adjustment knob until the number on the flow meter shows the selected flow value. Rotating clockwise increases the flow rate, and rotating counterclockwise decreases the flow rate.

[0080] (7) If precise control of the oil flow in the pipeline is required, use the stylus to click the open adjustment button. The indicator light on the right will change from red to green. At this time, the regulating valve will enter the automatic adjustment state. If precise control of the oil flow in the pipeline is not required, and the open adjustment button has been pressed, use the stylus to click the close adjustment button. The automatic adjustment of the regulating valve will stop, and the indicator light on the right will change from green to red.

[0081] (8) When the oil level in the oil tank 31 reaches a certain pump stop level, the system enters the oil shortage protection mode. At this time, the oil pump 32, electric ball valve 361 and oil quantity regulating valve 363 will automatically close.

[0082] (9) When the oil sample level in oil tank 31 is higher than the pump stop level and it is necessary to stop injecting oil into the water, use the stylus to click the stop button of oil pump 32;

[0083] (10) After the experiment is completed, estimate the amount of oil sample remaining in oil tank 31, select a suitable container and place it below the first oil valve 381, open the first oil valve 381, and release the remaining oil sample in oil tank 31 into the selected container.

[0084] (11) Wipe the residual oil sample in oil tank 31 clean with an oil-absorbing felt;

[0085] (12) Pull the underwater oil nozzle to the shore. Do not disassemble the oil hose. Replace the oil nozzle with the largest diameter one. Put the oil hose with an inner diameter slightly smaller than the outer diameter of the nozzle on the nozzle and clamp it. Place the other end of the oil hose into the diesel recovery bucket.

[0086] (13) Close the first oil valve 381, add diesel fuel to the oil tank 31, start the oil pump 32, flush the oil pipeline, repeat several times until the entire pipeline is clean.

[0087] (14) Close the second oil valve 351, the third oil valve 352, the fourth oil valve 362, the fifth oil valve 372 and the sixth oil valve 374;

[0088] (15) Export data.

[0089] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An underwater oil and gas injection simulation device, characterized in that, It includes a support structure unit, an air circuit unit, an oil circuit unit, an electrical unit, and a nozzle cabinet unit. The support structure unit includes a support structure body. The air circuit unit, the oil circuit unit, the electrical unit, and the nozzle cabinet unit are all fixedly installed on the support structure body. The air circuit unit is used to send compressed air to the underwater environment through a pipeline. The oil circuit unit is used to send oil samples to the underwater environment through an oil delivery pipeline. The electrical unit is electrically connected to the air circuit unit and the oil circuit unit respectively. The nozzle cabinet unit is used to store underwater air injection nozzles and oil injection nozzles. The supporting structure includes a base plate and a supporting frame. The bottom of the base plate is provided with rollers, and the supporting frame is fixedly installed on the top of the base plate. The gas circuit unit includes an air compressor, a refrigerated dryer, a gas flow meter, and a quick-connect gas injection connector. The air compressor is fixedly installed on the base plate. The air outlet of the air compressor is connected to the air inlet of the refrigerated dryer through a first gas injection pipe. The refrigerated dryer is fixedly installed on the top of the support frame. The air outlet of the refrigerated dryer is connected to the gas flow meter through a second gas injection pipe. The gas flow meter is installed inside the gas flow meter cabinet at the top of the nozzle cabinet unit. The air outlet of the gas flow meter is connected to the quick-connect gas injection connector through a third gas injection pipe. The quick-connect gas injection connector is connected to the underwater gas injection nozzle through a gas injection hose. Gas is injected into the underwater gas injection nozzle through the gas injection hose connected to the quick-connect gas injection connector, and finally, gas is injected into the water through the gas injection nozzle. The first air injection pipe is provided with a first air valve, a second air valve, a third air valve, and a refrigerated dryer inlet filter in sequence from one end of the air compressor to one end of the refrigerated dryer. The second air injection pipe is provided with a refrigerated dryer outlet filter, a fourth air valve, a sixth air valve, a gas flow regulating valve, and a needle valve in sequence from one end of the refrigerated dryer to one end of the gas flow meter. The third air injection pipe is provided with an air injection solenoid valve, a gas pressure sensor, a seventh air valve, and a gas check valve in sequence from one end of the gas flow meter to one end of the air injection quick connector. Both the refrigerated dryer inlet filter and the refrigerated dryer outlet filter are provided with drain valves at their bottoms. A drain valve is provided at one end of the refrigerated dryer near the air outlet filter, and a water collection bottle is provided on the support frame near the refrigerated dryer. The water collection bottle is connected to the drain valve through a drain pipe. This device is a simulation system for injecting oil and gas underwater. It can be used to inject oil and gas underwater separately, or simultaneously, to simulate leaks in subsea oil and gas pipelines.

2. The underwater oil and gas injection simulation device as described in claim 1, characterized in that, The fourth air valve is connected to a three-way air valve at its outlet end. One outlet end of the three-way air valve is connected to the sixth air valve, and the other outlet end is connected to an exhaust pipe. The exhaust pipe is provided with a fifth air valve and an exhaust port at the end away from the three-way air valve.

3. The underwater oil and gas injection simulation device as described in claim 1, characterized in that, The oil circuit unit includes an oil tank, an oil pump, an oil flow meter, and a quick-connect oil injection connector mounted on the base plate. An oil level sensor and an oil temperature sensor are installed at the bottom of the oil tank. The oil outlet of the oil tank is connected to the oil pump through a first oil injection pipeline. The oil outlet of the oil pump is connected to the oil flow meter through a second oil injection pipeline. The oil outlet of the oil flow meter is connected to the quick-connect oil injection connector through a third oil injection pipeline. The quick-connect oil injection connector is connected to an underwater oil injection nozzle through an oil injection hose.

4. The underwater oil and gas injection simulation device as described in claim 3, characterized in that, The first oil injection pipeline is provided with a second oil valve and a third oil valve in sequence from one end of the oil tank to one end of the oil pump. The second oil injection pipeline is provided with an electric ball valve, a fourth oil valve and an oil flow meter in sequence from one end of the oil pump to one end of the oil flow meter. The third oil injection pipeline is provided with an oil check valve, a fifth oil valve, an oil pressure sensor and a sixth oil valve in sequence from one end of the oil flow meter to one end of the oil injection quick connector. The outlet end of the second oil valve is connected to an oil three-way valve. One oil outlet end of the oil three-way valve is connected to the third oil valve, and the other oil outlet end is connected to a drain pipe. The end of the drain pipe away from the oil three-way valve is provided with a first oil valve and a drain port in sequence.

5. The underwater oil and gas injection simulation device as described in claim 1, characterized in that, The electrical unit includes an electrical control cabinet, a power junction box, a wiring duct, and an underwater nozzle junction box. The electrical control cabinet is located on the top of the support frame, and the power junction box is installed on the side of the electrical control cabinet. The wiring duct and the nozzle junction box are fixedly mounted on the top of the base plate by mounting brackets. The power junction box is used to connect to an external power source. The electrical control cabinet, the wiring duct, and the underwater nozzle junction box are connected by conduit.

6. The underwater oil and gas injection simulation device as described in claim 1, characterized in that, The nozzle cabinet unit includes a nozzle cabinet disposed on top of the support frame, a temporary parts box at the bottom of the nozzle cabinet, and a gas flow meter cabinet disposed on top of the nozzle cabinet.

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