Carbon dioxide fracturing cooling device

Abstract

The utility model provides a carbon dioxide fracturing cooling device which comprises a plurality of groups of carbon dioxide storage tanks, the air outlet ends of the plurality of carbon dioxide storage tanks are all connected with a pressure stabilizing tank assembly, the air outlet end of each carbon dioxide storage tank is provided with a storage tank air outlet valve, and the pressure stabilizing tank assembly comprises a pressure stabilizing storage tank. And pressure sensors are connected to two openings of the pressure stabilizing storage tank through flanges. Due to the arrangement of the pressure stabilizing storage tank, the pressure sensor, the air inlet valve and the air outlet valve, the amount of carbon dioxide conveyed to the booster pump is more stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of carbon dioxide fracturing, and in particular relates to a carbon dioxide fracturing cooling device. Background Art

[0002] The carbon dioxide fracturing device uses liquid carbon dioxide instead of water as the fracturing fluid to perform fracturing construction. During the fracturing construction process, a cooling device is required for circulating cooling. The existing carbon dioxide fracturing cooling device includes a carbon dioxide storage tank, a carbon dioxide compressor, a carbon dioxide plunger pump and a connecting suction component. A fracturing truck is arranged on one side of the carbon dioxide storage tank, a booster pump is arranged between the fracturing truck and the carbon dioxide storage tank, and a fracturing wellhead is arranged on one side of the fracturing truck. In this carbon dioxide fracturing cooling device, as the carbon dioxide in the storage tank is consumed, the amount of carbon dioxide delivered from the storage tank to the booster pump decreases, making the amount of carbon dioxide delivered from the booster pump to the fracturing truck unstable, affecting the normal operation of the fracturing truck. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a carbon dioxide fracturing cooling device, which makes the amount of carbon dioxide delivered to the booster pump more stable, thereby ensuring the stability of the fracturing operation.

[0004] The utility model is realized by the following technical solutions:

[0005] A carbon dioxide fracturing cooling device comprises a carbon dioxide storage tank, wherein a plurality of groups of carbon dioxide storage tanks are provided, and the device is characterized in that the gas outlet ends of the plurality of carbon dioxide storage tanks are connected to a pressure-stabilizing tank assembly, and the gas outlet end of each of the carbon dioxide storage tanks is provided with a tank gas outlet valve, the pressure-stabilizing tank assembly comprises a pressure-stabilizing tank, and the two openings of the pressure-stabilizing tank are flange-connected with a pressure sensor, the gas inlet end pipeline of the pressure-stabilizing tank is connected with an gas inlet valve, the gas outlet end pipeline of the pressure-stabilizing tank is connected with an gas outlet valve, the pressure-stabilizing tank assembly is connected with a booster pump, and the output end pipeline of the booster pump is connected with a fracturing vehicle.

[0006] Preferably, the air inlet valve pipeline is connected between the pressure-stabilizing storage tank and the intersection of multiple tank air outlet valves.

[0007] Preferably, the air outlet valve pipeline is connected between the pressure-stabilizing storage tank and the booster pump.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] In the utility model, the arrangement of the pressure-stabilizing storage tank, the pressure sensor, the air inlet valve and the air outlet valve is conducive to making the amount of carbon dioxide delivered to the booster pump more stable.

[0010] In the utility model, the arrangement of the booster pump is conducive to pumping the carbon dioxide in the pressure-stabilizing tank assembly to the fracturing vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a structural schematic diagram of a pressure-stabilizing tank assembly of the utility model.

[0013] In the figure:

[0014] 1. Carbon dioxide storage tank; 2. Storage tank outlet valve; 3. Pressure-stabilizing tank assembly; 4. Booster pump; 5. Fracturing truck; 6. Exhaust valve; 7. Carbon dioxide compressor; 8. Carbon dioxide plunger pump; 9. Bypass valve; 10. Valve; 11. Wellhead valve; 12. Fracturing wellhead; 31. Pressure-stabilizing storage tank; 32. Pressure sensor; 33. Inlet valve; 34. Outlet valve. DETAILED DESCRIPTION

[0015] The utility model is described in detail below in conjunction with the accompanying drawings. Figure 1 As shown, a carbon dioxide fracturing cooling device includes a carbon dioxide storage tank 1, and the carbon dioxide storage tank 1 is provided in multiple groups. The gas outlet ends of the multiple carbon dioxide storage tanks 1 are connected to the pressure-stabilizing tank assembly 3, and the gas outlet end of each of the carbon dioxide storage tanks 1 is installed with a tank gas outlet valve 2.

[0016] In this embodiment, combined with the Figure 2 As shown, the pressure-stabilizing tank assembly 3 includes a pressure-stabilizing storage tank 31, and the two openings of the pressure-stabilizing storage tank 31 are flange-connected with pressure sensors 32. The air inlet pipeline of the pressure-stabilizing storage tank 31 is connected with an air inlet valve 33, and the air outlet pipeline of the pressure-stabilizing storage tank 31 is connected with an air outlet valve 34. The carbon dioxide in the carbon dioxide storage tank 1 is first transported to the pressure-stabilizing storage tank 31, and the pressure sensor 32 is connected to an external industrial control device. The pressure sensor 32 can detect the air pressure in the pressure-stabilizing storage tank 31. The user can control the amount of carbon dioxide transported in the pressure-stabilizing storage tank 31 by controlling the air inlet valve 33, and can control the amount of carbon dioxide transported to the booster pump 4 by controlling the air outlet valve 34, so that the booster pump 4 can stably and continuously transport carbon dioxide to the fracturing truck 5.

[0017] In the present embodiment, specifically, the pressure-stabilizing tank assembly 3 is connected to a booster pump 4, the output end pipeline of the booster pump 4 is connected to a fracturing vehicle 5, an exhaust valve 6 is installed on the fracturing vehicle 5, the output ends of the plurality of fracturing vehicles 5 are connected to a wellhead valve 11, a first branch, a second branch and a third branch are connected in parallel between the output ends of the plurality of fracturing vehicles 5 and the wellhead valve 11, wherein a carbon dioxide compressor 7 is installed on the first branch, valves 10 are installed at both ends of the carbon dioxide compressor 7, a carbon dioxide plunger pump 8 is installed on the second branch, valves 10 are installed at both ends of the carbon dioxide plunger pump 8, a bypass valve 9 is installed on the third branch, and the wellhead valve 11 is connected to a fracturing wellhead 12.

[0018] In this embodiment, specifically, the air inlet valve 33 pipeline is connected between the intersection of the pressure-stabilizing storage tank 31 and the multiple tank air outlet valves 2 .

[0019] In this embodiment, specifically, the outlet valve 34 is connected to a pipeline between the pressure-stabilizing storage tank 31 and the booster pump 4 .

[0020] How it works

[0021] In the utility model, the booster pump 4 pumps the carbon dioxide in the pressure-stabilizing tank assembly 3 to the fracturing vehicle 5, and the user starts the carbon dioxide compressor 7, opens the exhaust valve 6 on the booster pump 4 and the fracturing vehicle 5, opens the valves 10 before and after the carbon dioxide plunger pump 8, closes the carbon dioxide compressor 7 and the valves 10 before and after, starts the carbon dioxide plunger pump 8, and sucks the liquid carbon dioxide in the booster pump 4 and the fracturing vehicle 5 and injects it into the fracturing wellhead 12, thereby realizing the function of cooling circulation.

[0022] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the protection scope of the utility model.

Claims

1. A carbon dioxide fracturing cooling device, comprising a carbon dioxide storage tank (1), wherein the carbon dioxide storage tank (1) is provided in a plurality of groups, characterized in that: The gas outlet ends of the plurality of carbon dioxide storage tanks (1) are connected to a pressure-stabilizing tank assembly (3), and the gas outlet end of each carbon dioxide storage tank (1) is equipped with a tank gas outlet valve (2). The pressure-stabilizing tank assembly (3) comprises a pressure-stabilizing tank (31), and the two openings of the pressure-stabilizing tank (31) are flange-connected with a pressure sensor (32), the gas inlet end pipeline of the pressure-stabilizing tank (31) is connected to an gas inlet valve (33), the gas outlet end pipeline of the pressure-stabilizing tank (31) is connected to an gas outlet valve (34), the pressure-stabilizing tank assembly (3) is connected to a booster pump (4), and the output end pipeline of the booster pump (4) is connected to a fracturing vehicle (5).

2. The carbon dioxide fracturing cooling device according to claim 1, characterized in that: The air inlet valve (33) pipeline is connected between the pressure-stabilizing storage tank (31) and the intersection of a plurality of storage tank air outlet valves (2).

3. The carbon dioxide fracturing cooling device according to claim 1, characterized in that: The gas outlet valve (34) pipeline is connected between the pressure-stabilizing storage tank (31) and the booster pump (4).

4. The carbon dioxide fracturing cooling device according to claim 1, characterized in that: An exhaust valve (6) is installed on the fracturing vehicle (5), and the output ends of the plurality of fracturing vehicles (5) are connected to wellhead valves (11).

5. The carbon dioxide fracturing cooling device according to claim 1, characterized in that: A first branch, a second branch and a third branch are connected in parallel between the output end of the plurality of fracturing vehicles (5) and the wellhead valve (11), wherein a carbon dioxide compressor (7) is installed on the first branch, and valves (10) are installed at both ends of the carbon dioxide compressor (7); a carbon dioxide plunger pump (8) is installed on the second branch, and valves (10) are installed at both ends of the carbon dioxide plunger pump (8); and a bypass valve (9) is installed on the third branch.

6. The carbon dioxide fracturing cooling device according to claim 4, characterized in that: The wellhead valve (11) is connected to the fracturing wellhead (12).

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