Negative pressure suction sled device

Abstract

The utility model relates to oilfield workover operation technical field, especially in kind of negative pressure suction sled device. The negative pressure tank, drainage pump, explosion -proof control cabinet, negative pressure fan of this device are fixed on the base, pressure sensor, liquid level transmitter, visual liquid level meter are installed on the negative pressure tank, negative pressure fan, drainage pump are connected with the negative pressure tank respectively, the explosion -proof control cabinet receives the pressure data transmission of pressure sensor and controls the working condition of negative pressure fan, the explosion -proof control cabinet receives the liquid level data transmission of liquid level transmitter and controls the working condition of drainage pump. The utility model has realized convenient, occupies small, can realize waste liquid real -time recovery and not landing, avoid the toxic and harmful material overflow, can adjust the working condition automatically simultaneously, save manpower and material resources, and have explosion -proof function, guarantee the operation safety.

Description

Technical Field

[0001] This utility model relates to the field of oilfield well repair operation technology, and in particular to a negative pressure suction skid device. Background Technology

[0002] During minor well repairs, well fluid overflow is inevitable. Currently, there are two main methods for handling overflow waste fluid: one is for on-site personnel to collect and temporarily store it in a waste fluid tank. However, the waste fluid contains toxic and harmful substances, which not only pollute the air and endanger personnel health, but also easily lead to spillage during collection, causing irreversible pollution to the land and environment. The other method is to use tank trucks for direct recovery. However, tank trucks are large, occupying space at the work site, and require long-term occupation of both the tank truck and personnel, consuming significant manpower and resources. Therefore, there is an urgent need for an efficient, environmentally friendly, and convenient waste fluid recovery device to solve these problems. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a negative pressure suction skid device. This device is easy to move, occupies little space, can realize real-time recycling of waste liquid without it touching the ground, avoids the spillage of toxic and harmful substances, can automatically adjust the working state, save manpower and material resources, and has explosion-proof function to ensure operational safety.

[0004] The technical solution adopted by this utility model is as follows: a negative pressure suction skid device, including a base, a negative pressure tank, a drain pump, a negative pressure fan, and an explosion-proof control cabinet mounted on the base; the inlet pipe of the negative pressure tank is connected to an oil well four-way connector, and a pressure sensor, a level transmitter, and a visual level gauge are installed on the tank body; the negative pressure fan and the drain pump are respectively connected to the negative pressure tank through pipelines; the explosion-proof control cabinet receives pressure data transmitted by the pressure sensor and controls the working state of the negative pressure fan; the explosion-proof control cabinet receives level data transmitted by the level transmitter and controls the working state of the drain pump.

[0005] Furthermore, the base is provided with lifting lugs around its perimeter.

[0006] Furthermore, the explosion-proof control cabinet is equipped with a control switch, frequency converter, PID pressure gauge, digital level gauge, AC contactor I and AC contactor II, and all electrical components of the explosion-proof control cabinet are explosion-proof components.

[0007] The pressure sensor is connected to the PID pressure gauge via a data cable. The PID pressure gauge is connected to the frequency converter. The output of the frequency converter is connected to the input of AC contactor I via a cable. The output of AC contactor I is connected to the negative pressure fan via a cable.

[0008] The level transmitter is connected to the digital level gauge via a data line. The control terminal of the digital level gauge is connected to the control terminal of AC contactor II via a cable. The output terminal of AC contactor II is connected to the drain pump via a cable.

[0009] Furthermore, the control switches include a main power switch, an automatic-manual-stop switch for the negative pressure fan, and an automatic-manual-stop switch for the drain pump. The main power switch is connected to the input terminal of the frequency converter and the input terminal of the AC contactor II via cables.

[0010] Furthermore, the discharge pump is connected to a waste liquid recovery tanker truck.

[0011] Furthermore, the negative pressure tank is provided with a drain port at the lower end and an inlet port at the top. The drain port and the inlet port are normally closed and are used for the maintenance or cleaning of the negative pressure tank.

[0012] The beneficial effects of this utility model are:

[0013] 1. This device has a high degree of integration and small size. The base is equipped with lifting lugs around the perimeter, making it easy and quick to move. It occupies little space at the work site, saving a lot of manpower and material resources.

[0014] 2. The negative pressure tank is completely sealed and operates under negative pressure, which effectively prevents the leakage of toxic and harmful substances and protects the health of on-site personnel.

[0015] 3. Waste liquid is drawn into the negative pressure tank in real time through pipelines, realizing "real-time recycling" and the waste liquid does not fall to the ground, which greatly reduces pollution to the land and environment;

[0016] 4. Automatic or manual control mode can be selected via a switch. In automatic mode, the working status of the negative pressure fan and the drain pump can be automatically adjusted according to the overflow volume, eliminating the need for real-time manual supervision and further saving manpower.

[0017] 5. The electrical components of the explosion-proof control cabinet are all made of explosion-proof components, which can effectively prevent static electricity fire or deflagration during oil well construction and improve operational safety. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a top view of the present invention.

[0021] Figure 3 This is a structural diagram of an explosion-proof control cabinet.

[0022] In the diagram: 1 - Oil well four-way valve, 2 - Pipeline, 3 - Base, 4 - Drain pump, 5 - Drain outlet, 6 - Negative pressure tank, 7 - Explosion-proof control cabinet, 8 - Inlet pipe, 9 - Negative pressure fan, 10 - Pressure sensor, 11 - Visual level gauge, 12 - Level transmitter, 13 - Tank inlet, 14 - Control switch, 15 - Frequency converter, 16 - PID pressure gauge, 17 - Digital level gauge, 18 - AC contactor I, 19 - AC contactor II. Detailed Implementation

[0023] like Figure 1 , Figure 2 As shown, a negative pressure suction skid device includes a base 3, a negative pressure tank 6 mounted on the base 3, a drain pump 4, a negative pressure fan 9, and an explosion-proof control cabinet 7. The base 3 is equipped with lifting lugs around its perimeter for easy hoisting and transport of the device. The inlet pipe 8 of the negative pressure tank 6 is connected to an oil well four-way valve 1 via a pipeline 2. During well workover operations, overflow fluid flows into the negative pressure tank 6 through the pipeline 2. A pressure sensor 10, a level transmitter 12, and a visual level gauge 11 are installed on the negative pressure tank 6. The visual level gauge 11 allows for direct observation of the liquid level inside the negative pressure tank 6, serving as an auxiliary basis for judgment by the digital level gauge 17. The negative pressure tank 6 is connected to the negative pressure fan 9 via a pipeline, which provides a negative pressure environment for the negative pressure tank 6. The negative pressure tank 6 is connected to the drain pump 4 via a pipeline, and the drain pump 4 is connected to a waste liquid recovery tanker truck for waste liquid transfer.

[0024] The explosion-proof control cabinet 7 receives pressure data transmitted by the pressure sensor 10 and controls the working state of the negative pressure fan 9; the explosion-proof control cabinet 7 receives liquid level data transmitted by the liquid level transmitter 12 and controls the working state of the drain pump 4.

[0025] like Figure 3 As shown, the explosion-proof control cabinet 7 is equipped with a control switch 14, a frequency converter 15, a PID pressure gauge 16, a digital level gauge 17, an AC contactor I 18, and an AC contactor II 19. All electrical components of the explosion-proof control cabinet 7 are explosion-proof components, which can prevent static electricity fire or deflagration during oil well construction.

[0026] The pressure sensor 10 is connected to the PID pressure gauge 16 via a data cable, and the pressure inside the negative pressure tank 6 is displayed on the PID pressure gauge 16. The PID pressure gauge 16 is connected to the frequency converter 15, and the output terminal of the frequency converter 15 is connected to the input terminal of the AC contactor I 18 via a cable. The output terminal of the AC contactor I 18 is connected to the negative pressure fan 9 via a cable.

[0027] The level transmitter 12 is connected to the digital level gauge 17 via a data cable. The liquid level in the negative pressure tank 6 can be displayed directly on the digital level gauge 17. The control terminal of the digital level gauge 17 is connected to the control terminal of the AC contactor II 19 via a cable. The output terminal of the AC contactor II 19 is connected to the drain pump 4 via a cable.

[0028] The control switch 14 includes a main power switch, an automatic-manual-stop switch for the negative pressure fan, and an automatic-manual-stop switch for the drain pump. The main power switch is connected to the input terminal of the frequency converter 15 and the input terminal of the AC contactor II 19 via cables.

[0029] The negative pressure tank 6 is provided with a drain port 5 at the lower end and a tank inlet 13 at the top. The drain port 5 and the tank inlet 13 are normally closed and are used for maintenance or cleaning of the negative pressure tank 6.

[0030] The working process of this utility model is as follows: During well repair operations, the oil well four-way valve 1 is first connected to the inlet pipe 8 of the negative pressure tank 6 via pipeline 2, and the drainage pump 4 is connected to the waste liquid recovery tanker. The main power switch is turned on, and the frequency converter 15 starts and enters standby mode.

[0031] Select the operating mode of the negative pressure fan 9 according to the operation requirements: If manual mode is selected, turn the negative pressure fan selector switch to manual mode, the AC contactor I 18 is turned on, and the frequency converter 15 makes the negative pressure fan 9 work at a constant speed under manual control; if automatic mode is selected, turn the negative pressure fan selector switch to automatic mode, the AC contactor I 18 is turned on, the pressure sensor 10 transmits the pressure value in the negative pressure tank 6 to the PID pressure gauge 16 through the data line, and the PID pressure gauge 16 controls the frequency converter 15 according to the set pressure to make the negative pressure fan 9 enter the constant pressure operation state, ensuring that the negative pressure tank 6 always maintains a constant negative pressure. At this time, the overflow liquid is sucked into the negative pressure tank 6 through the pipeline 2 under the action of negative pressure, realizing real-time recovery and preventing waste liquid from falling to the ground.

[0032] Simultaneously select the operating mode of the drain pump 4: If manual mode is selected, switch the drain pump selector switch to manual mode, AC contactor II 19 is turned on, drain pump 4 starts, and drains the waste liquid in the negative pressure tank 6 to the waste liquid recovery tanker. The operator observes the liquid level through the visual level gauge 11. When the liquid level drops to the set height, switch the drain pump selector switch to stop mode, AC contactor II 19 is turned off, and drain pump 4 stops working; If automatic mode is selected, switch the drain pump selector switch to automatic mode, the level transmitter 12 transmits the liquid level data in the negative pressure tank 6 to the digital level gauge 17 through the data line. The digital level gauge 17 controls the AC contactor II 19 to turn on or off according to the set value, indirectly controlling the operation of drain pump 4, so that the liquid level in the negative pressure tank 6 is maintained at a certain level.

[0033] When both the negative pressure fan switch and the drain pump switch are in automatic mode, the negative pressure tank 6 will maintain the set negative pressure and liquid level. The device can automatically adjust its operating status according to the overflow rate, eliminating the need for real-time manual monitoring and saving manpower. After operation, simply switch all switches to stop mode and turn off the main power switch.

[0034] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A negative pressure suction skid device, characterized in that: The system includes a base (3), a negative pressure tank (6) mounted on the base (3), a drain pump (4), a negative pressure fan (9), and an explosion-proof control cabinet (7). The inlet pipe (8) of the negative pressure tank (6) is connected to the well cross-connector (1). A pressure sensor (10), a level transmitter (12), and a visual level gauge (11) are installed on the tank body of the negative pressure tank (6). The negative pressure fan (9) and the drain pump (4) are connected to the negative pressure tank (6) through pipelines. The explosion-proof control cabinet (7) receives the pressure data transmitted by the pressure sensor (10) and controls the working state of the negative pressure fan (9). The explosion-proof control cabinet (7) receives the level data transmitted by the level transmitter (12) and controls the working state of the drain pump (4).

2. The negative pressure suction skid device according to claim 1, characterized in that: The base (3) is provided with lugs around its perimeter.

3. The negative pressure suction skid device according to claim 1, characterized in that: The explosion-proof control cabinet (7) is equipped with a control switch (14), a frequency converter (15), a PID pressure gauge (16), a digital level gauge (17), an AC contactor I (18) and an AC contactor II (19), and all electrical components of the explosion-proof control cabinet (7) are explosion-proof components. The pressure sensor (10) is connected to the PID pressure gauge (16) via a data line. The PID pressure gauge (16) is connected to the frequency converter (15). The output end of the frequency converter (15) is connected to the input end of the AC contactor I (18) via a cable. The output end of the AC contactor I (18) is connected to the negative pressure fan (9) via a cable. The level transmitter (12) is connected to the digital level meter (17) via a data line. The control terminal of the digital level meter (17) is connected to the control terminal of the AC contactor II (19) via a cable. The output terminal of the AC contactor II (19) is connected to the drain pump (4) via a cable.

4. The negative pressure suction skid device according to claim 3, characterized in that: The control switch (14) includes a main power switch, an automatic-manual-stop switch for the negative pressure fan, and an automatic-manual-stop switch for the drain pump. The main power switch is connected to the input terminal of the frequency converter (15) and the input terminal of the AC contactor II (19) via cables.

5. The negative pressure suction skid device according to claim 1, characterized in that: The discharge pump (4) is connected to the waste liquid recovery tanker.

6. The negative pressure suction skid device according to claim 1, characterized in that: The negative pressure tank (6) is provided with a drain port (5) at the lower end and a tank inlet (13) at the top. The drain port (5) and the tank inlet (13) are normally closed and are used for the maintenance or cleaning of the negative pressure tank (6).

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