Device for measuring accurate position of oil-water-gas interface in oil tank

Abstract

The utility model discloses a device for measuring the accurate position of an oil-water-gas interface in an oil tank, which comprises a mounting plate, a buoyancy sensor, a winch and a chain length counter, the bottom of the mounting plate is connected with a counterweight module through a connecting cable, the buoyancy sensor is fixedly arranged at the top of the mounting plate, the winch is arranged above the mounting plate, and a steel cable is wound on the outer side of the winch; the cable chain length counter is fixedly arranged on the winch; the bottom end of the steel cable is connected with the mounting plate; the balance weight module comprises a shell and balance weight materials in the shell, and the balance weight module can obtain different buoyancy by adjusting the number of the balance weight materials. Through the structure, the winch drives the buoyancy counterweight module to move from the bottom of the oil tank to the upper part of the oil tank at a constant speed, and the accurate position of each interface among oil, water and gas is calculated according to the buoyancy change of the whole-course buoyancy counterweight module; the device for analyzing the accurate position of the medium interface in the tank, which is safe and accurate, is provided by utilizing the physical Archimedes law and matching with a weighing sensor outside the tank and an external data remote transmission computer.

Description

Technical Field

[0001] This utility model relates to the field of oil-water-gas interface position analysis technology in oil tanks, and particularly to a device for accurately measuring the position of the oil-water-gas interface in oil tanks. Background Technology

[0002] In oilfield production, crude oil produced from wells in remote areas is initially stored in specially designed tanks. The well fluid is initially an oil-water mixture; after a certain period of settling, water will separate, resulting in a final state of oil, water, and gas separation in the tank. Before discharging oil from the tank, the precise height of the oil-water-gas interface must be determined to decide on the safest and most efficient oil extraction process.

[0003] Currently, due to production safety considerations, the use of electrically powered sensors inside oil tanks is not permitted. Therefore, a safe and accurate device for precisely analyzing the position of the interface between media inside the tank is needed. Thus, this invention provides a device for precisely determining the position of the oil-water-gas interface inside an oil tank to solve the problems mentioned in the background section. Utility Model Content

[0004] The purpose of this invention is to provide a device for accurately determining the position of the oil-water-gas interface inside an oil tank. A winch drives a buoyancy counterweight module to move at a constant speed from the bottom to the top of the oil tank. The precise position of each interface between oil, water, and gas is calculated based on the buoyancy change of the buoyancy counterweight module throughout the process. Utilizing Archimedes' principle, combined with an external weighing sensor and an external data transmission computer, a safe and accurate device for analyzing the precise position of the medium interface inside the tank is provided.

[0005] To achieve the above objectives, a device for accurately determining the position of the oil-water-gas interface inside an oil tank is provided, comprising a mounting plate, a buoyancy sensor, a winch, and a chain length counter. A counterweight module is connected to the bottom of the mounting plate via a connecting cable. The buoyancy sensor is fixed to the top of the mounting plate. The winch is located above the mounting plate and has a steel cable wound around its outer side. The chain length counter is fixed to the winch, and the bottom end of the steel cable is connected to the mounting plate.

[0006] The counterweight module includes a shell and counterweight materials inside the shell, and the counterweight module can obtain different buoyancy by adjusting the amount of counterweight materials.

[0007] The device for accurately determining the position of the oil-water-gas interface in an oil tank also includes a display screen, which integrates a computer control module, and the buoyancy change value of the buoyancy sensor is transmitted to the computer control module.

[0008] According to the aforementioned device for accurately determining the position of the oil-water-gas interface inside an oil tank, the buoyancy sensor adopts a metal strain bridge structure.

[0009] According to the aforementioned device for accurately determining the position of the oil-water-gas interface in an oil tank, the chain length counter includes magnetic poles and a Hall effect counting module.

[0010] According to the aforementioned device for accurately determining the position of the oil-water-gas interface in an oil tank, the buoyancy sensor includes a buoyancy recording and transmission module, which includes a semiconductor strain sensor and an interface converter.

[0011] According to the aforementioned device for accurately determining the position of the oil-water-gas interface inside an oil tank, a cover plate is bolted to the top of the shell, and the counterweight material is lead shot.

[0012] The device for accurately determining the position of the oil-water-gas interface in an oil tank also includes a power supply, and the steel cable, connecting cable, and shell are all made of stainless steel.

[0013] This utility model has the following beneficial effects:

[0014] 1. Compared with existing technologies, when the winch is running under control, it drives the buoyancy counterweight module to move at a constant speed from the bottom of the oil tank to the top of the oil tank. The computer control module in the system will calculate the precise position of each interface between oil, water and gas based on the buoyancy change of the buoyancy counterweight module throughout the process.

[0015] By utilizing Archimedes' principle in physics, and in conjunction with external weighing sensors and an external data transmission computer, the precise position of the tank medium interface can be continuously transmitted to the oilfield digital center server at set time intervals. This provides a guarantee for the safe and rapid oil production process and offers a safe and accurate tank medium interface precise position analysis device that is applicable to both crude oil and refined oil. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a schematic diagram of the layout structure of a device for accurately measuring the position of the oil-water-gas interface in an oil tank according to the present invention.

[0018] Figure 2 This is a schematic diagram of the counterweight module structure of a device for accurately determining the position of the oil-water-gas interface in an oil tank according to this utility model.

[0019] Legend:

[0020] 1. Mounting plate; 2. Buoyancy sensor; 3. Connecting cable; 4. Counterweight module; 5. Winch; 6. Chain length counter; 7. Steel cable; 8. Cover plate; 9. Display screen; 10. Power supply. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1-2 This utility model provides a device for accurately determining the position of the oil-water-gas interface in an oil tank. It includes a mounting plate 1, a buoyancy sensor 2, a winch 5, a chain length counter 6, a power supply 10, and a display screen 9. The bottom of the mounting plate 1 is connected to a counterweight module 4 via a connecting cable 3. The buoyancy sensor 2 is fixed to the top of the mounting plate 1. The winch 5 is located above the mounting plate 1 and has a steel cable 7 wound around its outer side. The chain length counter 6 is fixed to the winch 5, and the bottom end of the steel cable 7 is connected to the mounting plate 1.

[0023] The buoyancy sensor 2, the counterweight module 4, and the mounting plate 1 together form the buoyancy counterweight module. The buoyancy counterweight module is connected to the winch 5 via a steel cable 7. The length of the steel cable 7 depends on the depth of the oil tank (ensuring the length of the steel cable 7 is greater than the depth of the oil tank). When the winch 5 is operated under control, it moves the buoyancy counterweight module from the bottom of the oil tank to the top of the tank at a constant speed. The computer control module within the system calculates the precise positions of the interfaces between the oil, water, and gas based on the buoyancy changes of the buoyancy counterweight module throughout the process.

[0024] By utilizing Archimedes' principle in physics, and in conjunction with external weighing sensors and an external data transmission computer, the precise location of the tank medium interface can be continuously transmitted to the oilfield digital center server at set time intervals. This provides a guarantee for the safe and rapid oil production process and offers a safe and accurate method for analyzing the precise location of the tank medium interface, applicable to both crude oil and refined oil.

[0025] The counterweight module 4 includes a shell and counterweight materials inside the shell. Different buoyancy can be obtained by adjusting the amount of counterweight materials in the counterweight module 4. A cover plate 8 is bolted to the top of the shell. The counterweight material is lead shot.

[0026] The counterweight module 4 generates buoyancy when it comes into contact with the oil, water and gas phases inside the tank. It adopts a cylindrical stainless steel shell and is filled with a fixed amount of lead shot to adjust the counterweight of the buoyancy module so as to match the range of the buoyancy sensor 2.

[0027] The display screen 9 integrates a computer control module. It is a color LCD display used to show and manipulate content. The buoyancy sensor 2 transmits the buoyancy change value to the computer control module, which uses a 32-bit computer chip to handle all system control functions. The buoyancy sensor 2 employs a metal strain gauge bridge structure and includes a buoyancy recording and transmission module, which comprises a semiconductor strain sensor and an interface converter.

[0028] The chain length counter 6 includes magnetic poles and a Hall effect counting module, composed of a Hall effect semiconductor magnetic sensor. The system can accurately determine the position of each interface between oil, water, and gas. The steel cable 7, connecting cable 3, and housing are all made of stainless steel. The power supply 10 provides the system's power supply, using a 24VDC industrial switching power supply to provide energy for the entire system.

[0029] Working principle: The buoyancy counterweight module consists of buoyancy sensor 2, counterweight module 4, and mounting plate 1. This module is connected to winch 5 via steel cable 7, the length of which depends on the depth of the oil tank (ensuring the cable length is greater than the tank depth). When winch 5 is in controlled operation, it moves the buoyancy counterweight module from the bottom of the oil tank to the top at a constant speed. The computer control module within the system calculates the precise positions of the interfaces between oil, water, and gas based on the buoyancy changes of the counterweight module throughout the process.

[0030] By utilizing Archimedes' principle in physics, and in conjunction with external weighing sensors and an external data transmission computer, the precise location of the tank medium interface can be continuously transmitted to the oilfield digital center server at set time intervals. This provides a guarantee for the safe and rapid oil production process and offers a safe and accurate method for analyzing the precise location of the tank medium interface, applicable to both crude oil and refined oil.

[0031] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An apparatus for determining the precise position of the oil-water-gas interface in an oil tank, characterized in that The system includes a mounting plate (1), a buoyancy sensor (2), a winch (5), and a chain length counter (6). The bottom of the mounting plate (1) is connected to a counterweight module (4) via a connecting cable (3). The buoyancy sensor (2) is fixed to the top of the mounting plate (1). The winch (5) is located above the mounting plate (1) and has a steel cable (7) wrapped around its outer side. The chain length counter (6) is fixed to the winch (5). The bottom end of the steel cable (7) is connected to the mounting plate (1). The counterweight module (4) includes a shell and counterweight materials inside the shell, and the counterweight module (4) can obtain different buoyancy by adjusting the amount of counterweight materials.

2. A device for determining the precise position of the oil-water-gas interface in an oil tank according to claim 1, characterized in that It also includes a display screen (9), which integrates a computer control module, and the buoyancy change value of the buoyancy sensor (2) is transmitted to the computer control module.

3. A device for determining the precise position of the oil-water-gas interface in an oil tank according to claim 2, characterized in that The buoyancy sensor (2) adopts a metal strain bridge structure.

4. A device for determining the precise position of the oil-water-gas interface in an oil tank according to claim 3, characterized in that The chain length counter (6) includes magnetic poles and a Hall effect counting module.

5. A device for determining the precise position of the oil-water-gas interface in an oil tank according to claim 4, characterized in that The buoyancy sensor (2) includes a buoyancy recording and transmission module, which includes a semiconductor strain sensor and an interface converter.

6. A device for determining the precise position of the oil-water-gas interface in an oil tank according to claim 1, characterized in that The top of the shell is bolted with a cover plate (8), and the counterweight material is lead shot.

7. A device for determining the precise position of the oil-water-gas interface in an oil tank according to claim 1, characterized in that It also includes a power supply (10), and the steel cable (7), connecting cable (3) and shell are all made of stainless steel.

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