Gas storage device for carbon dioxide flooding

Abstract

The utility model discloses a gas storage device for carbon dioxide flooding, which comprises a bottom frame, a carbon dioxide gas storage tank, a pressure stabilizing cavity tank and a pressure supplementing cavity tank, the carbon dioxide gas storage tank and the pressure stabilizing cavity tank are both fixed on the bottom frame, the top of the pressure stabilizing cavity tank is connected to the pressure supplementing cavity tank through a pressure supplementing calandria, and the pressure supplementing calandria is connected with the pressure supplementing cavity tank. The pressure supplementing cavity tank is connected to the carbon dioxide storage tank through a pressure supplementing inlet pipe, the carbon dioxide storage tank is connected to the pressure stabilizing cavity tank through a conveying pipe, a flow valve is installed on the conveying pipe, a pressure supplementing cylinder is installed at the top of the pressure supplementing cavity tank, a pressure supplementing plug is plugged in a pressure supplementing cavity of the pressure supplementing cavity tank, and the pressure supplementing cavity tank is connected to the pressure stabilizing cavity tank. The tail end of a piston rod of the pressure supplementing cylinder extends into the pressure supplementing cavity and is connected and installed with the pressure supplementing plug, and a pressure supplementing one-way inlet valve is installed on the pressure supplementing inlet pipe. The device has the beneficial effects that carbon dioxide can be stored, and stable-pressure continuous output of the carbon dioxide is guaranteed during oil displacement.

Description

Technical Field

[0001] The utility model relates to the field of gas storage devices for oil recovery, in particular to a gas storage device for carbon dioxide oil recovery. Background Art

[0002] Carbon dioxide recovery technology is a technology that injects carbon dioxide into oil layers to increase the oil recovery rate of oil fields. By mixing carbon dioxide with formation crude oil, the formation crude oil can be effectively displaced to production wells. At present, carbon dioxide recovery has greater advantages than water recovery and is widely used. Carbon dioxide is provided through carbon dioxide storage tanks, but its output is relatively unstable as the carbon dioxide reserves in the tanks change. Utility Model Content

[0003] The purpose of the utility model is to provide a gas storage device for carbon dioxide oil recovery in order to solve the above problems.

[0004] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0005] A gas storage device for carbon dioxide oil recovery comprises a base frame, a carbon dioxide gas storage tank, a pressure-stabilizing chamber tank and a pressure-boosting chamber tank, wherein the carbon dioxide gas storage tank and the pressure-stabilizing chamber tank are both fixed to the base frame, the top of the pressure-stabilizing chamber tank is connected to the pressure-boosting chamber tank through a pressure-boosting discharge pipe, the pressure-boosting chamber tank is connected to the carbon dioxide gas storage tank through a pressure-boosting inlet pipe, the carbon dioxide gas storage tank is connected to the pressure-stabilizing chamber tank through a delivery pipe, a flow valve is installed on the delivery pipe, a pressure-boosting cylinder is installed on the top of the pressure-boosting chamber tank, a pressure-boosting plug is provided in the pressure-boosting chamber of the pressure-boosting chamber tank, a piston rod end of the pressure-boosting cylinder extends into the pressure-boosting chamber and is connected and installed together with the pressure-boosting plug, a pressure-boosting one-way inlet valve is installed on the pressure-boosting inlet pipe, a pressure-boosting one-way discharge valve is installed on the pressure-boosting discharge pipe, a battery slot is provided on the base frame, a battery is installed in the battery slot, and a controller is installed on the base frame.

[0006] Furthermore, a slot cover is installed at the slot of the battery slot.

[0007] Furthermore, an oil displacement output pipe is installed on the pressure stabilizing cavity tank, and an oil displacement output valve is installed on the oil displacement output pipe.

[0008] Furthermore, a filling pipe is installed on the carbon dioxide storage tank, and a filling valve is installed on the filling pipe.

[0009] Furthermore, a normally closed valve is installed on the pressure compensation inlet pipe, the pressure stabilizing chamber tank and the pressure compensation chamber tank are fixed together by a stabilizing frame, and a pressure sensor is installed in the tank cavity of the pressure stabilizing chamber tank.

[0010] The beneficial effect is that the gas storage device for carbon dioxide oil recovery described in the utility model can not only store carbon dioxide, but also ensure the stable and continuous output of carbon dioxide during oil recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural diagram of a gas storage device for carbon dioxide oil recovery described in the utility model;

[0012] Figure 2 It is an enlarged schematic diagram of the internal structure of a pressure-boosting chamber tank of a gas storage device for carbon dioxide oil recovery described in the utility model.

[0013] The following are the descriptions of the reference numerals:

[0014] 1. Base frame; 2. Gas storage tank; 3. Pressure stabilizing chamber tank; 4. Pressure boosting chamber tank; 5. Pressure boosting cylinder; 6. Controller; 7. Delivery pipe; 8. Flow valve; 9. Pressure boosting inlet pipe; 10. Cavity cover; 11. Filling pipe; 12. Filling valve; 13. Pressure boosting one-way inlet valve; 14. Pressure boosting discharge pipe; 15. Pressure boosting one-way discharge valve; 16. Oil displacement output valve; 17. Oil displacement output pipe; 18. Pressure boosting plug; 19. Normally closed valve; 20. Stabilizing frame. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings:

[0016] like Figure 1-Figure 2 As shown, a gas storage device for carbon dioxide oil recovery is composed of a base frame 1, a carbon dioxide gas storage tank 2, a pressure stabilizing chamber tank 3 and a pressure supplementing chamber tank 4;

[0017] The carbon dioxide gas storage tank 2 and the pressure stabilizing chamber tank 3 are both fixed to the bottom frame 1. The top of the pressure stabilizing chamber tank 3 is connected to the pressure stabilizing chamber tank 4 through a pressure stabilizing drain pipe 14. The pressure stabilizing chamber tank 4 is connected to the carbon dioxide gas storage tank 2 through a pressure stabilizing inlet pipe 9. The carbon dioxide gas storage tank 2 is connected to the pressure stabilizing chamber tank 3 through a delivery pipe 7. A flow valve 8 is installed on the delivery pipe 7 to control the flow rate so that the pressure in the pressure stabilizing chamber tank 3 is stable.

[0018] A pressure-compensating cylinder 5 is installed on the top of the pressure-compensating chamber tank 4, and a pressure-compensating plug 18 is provided in the pressure-compensating chamber of the pressure-compensating chamber tank 4. The piston rod end of the pressure-compensating cylinder 5 extends into the pressure-compensating chamber and is connected and installed with the pressure-compensating plug 18. A pressure-compensating one-way inlet valve 13 is installed on the pressure-compensating inlet pipe 9, and a pressure-compensating one-way exhaust valve 15 is installed on the pressure-compensating exhaust pipe 14, which only allows carbon dioxide to pass through in one direction. A battery slot is provided on the base frame 1, and a battery is installed in the battery slot for convenient power supply. A controller 6 is installed on the base frame 1.

[0019] like Figure 1-Figure 2 As shown, the utility model also discloses the following more optimized specific structures:

[0020] A slot cover 10 is installed at the slot of the battery slot to protect the internal battery.

[0021] An oil displacement output pipe 17 is installed on the pressure stabilizing chamber tank 3 , and an oil displacement output valve 16 is installed on the oil displacement output pipe 17 .

[0022] A filling pipe 11 is installed on the carbon dioxide storage tank 2 , and a filling valve 12 is installed on the filling pipe 11 .

[0023] A normally closed valve 19 is installed on the pressure compensation inlet pipe 9, and the pressure stabilizing chamber tank 3 and the pressure compensation chamber tank 4 are fixed together by a stabilizing frame 20. A pressure sensor is installed in the tank cavity of the pressure stabilizing chamber tank 3 to feedback the pressure and realize the pressure stabilizing output.

[0024] like Figure 1-Figure 2 The carbon dioxide gas storage device for oil recovery shown is supplemented with carbon dioxide through the filling pipe 11 before use. When the oil recovery operation is performed, the carbon dioxide is output through the oil recovery output pipe 17. At this time, the normally closed valve 19 is in a closed state, and the flow valve 8 and the oil recovery output valve 16 are opened. The flow valve 8 regulates the flow rate so that the pressure in the pressure-stabilizing chamber tank 3 is stable and the output is continuous. When the pressure is insufficient, the normally closed valve is opened, the pressure-boosting cylinder 5 is opened, and the flow valve is closed. The pressure in the pressure-stabilizing chamber tank 3 is stabilized by suction and discharge, thereby ensuring the stable and continuous output of carbon dioxide during the oil recovery process.

[0025] Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements shall fall within the scope of the present invention to be protected.

Claims

1. A gas storage device for carbon dioxide oil recovery, characterized in that: The invention comprises a base frame, a carbon dioxide gas storage tank, a pressure-stabilizing chamber tank and a pressure-compensating chamber tank, wherein the carbon dioxide gas storage tank and the pressure-stabilizing chamber tank are both fixed to the base frame, the top of the pressure-stabilizing chamber tank is connected to the pressure-compensating chamber tank through a pressure-compensating discharge pipe, the pressure-compensating chamber tank is connected to the carbon dioxide gas storage tank through a pressure-compensating inlet pipe, the carbon dioxide gas storage tank is connected to the pressure-stabilizing chamber tank through a delivery pipe, a flow valve is installed on the delivery pipe, a pressure-compensating cylinder is installed on the top of the pressure-compensating chamber tank, a pressure-compensating plug is provided in the pressure-compensating chamber of the pressure-compensating chamber tank, the piston rod end of the pressure-compensating cylinder extends into the pressure-compensating chamber and is connected and installed together with the pressure-compensating plug, a pressure-compensating one-way inlet valve is installed on the pressure-compensating inlet pipe, a pressure-compensating one-way discharge valve is installed on the pressure-compensating discharge pipe, a battery slot is provided on the base frame, a battery is installed in the battery slot, and a controller is installed on the base frame.

2. A gas storage device for carbon dioxide oil recovery according to claim 1, characterized in that: A slot cover is installed at the slot opening of the battery slot.

3. A gas storage device for carbon dioxide oil recovery according to claim 1, characterized in that: An oil displacement output pipe is installed on the pressure stabilizing cavity tank, and an oil displacement output valve is installed on the oil displacement output pipe.

4. A gas storage device for carbon dioxide oil recovery according to claim 1, characterized in that: A filling pipe is installed on the carbon dioxide gas storage tank, and a filling valve is installed on the filling pipe.

5. A gas storage device for carbon dioxide oil recovery according to claim 1, characterized in that: A normally closed valve is installed on the pressure compensation inlet pipe, the pressure stabilizing chamber tank and the pressure compensation chamber tank are fixed together through a stabilizing frame, and a pressure sensor is installed in the tank cavity of the pressure stabilizing chamber tank.

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