Single well oil pulling flow velocity monitoring and controlling device

Abstract

The utility model provides a single-well oil pulling flow velocity monitoring and controlling device which comprises a well site oil storage tank, a flow velocity control valve group and a flow velocity control visual control cabinet, and the well site oil storage tank is connected with the flow velocity control valve group through a flange. The flow velocity control valve bank is connected with the oil tank truck through a flange, and the flow velocity control visualization control cabinet is connected to the flow velocity control valve bank. The single-well oil pulling flow rate monitoring and controlling device is convenient to operate, safe and rapid, can achieve the effect of rapid installation through standard flange connection, can be widely applied to a single-well oil pulling site, eliminates unsafe behaviors controlled by experience in the oil loading process, and improves the oil loading efficiency. Potential safety hazards are eliminated from intrinsic safety, the personal safety of workers is ensured, and the labor intensity of the workers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas storage and transportation engineering technology, and in particular to a single-well oil extraction velocity monitoring and control device. Background Technology

[0002] During the loading and unloading of oil from a single well, there are requirements for the liquid flow rate. Before the liquid submerges the inlet pipe or before the loading and unloading is about to end, the flow rate should be controlled within 1 m / s. However, the flow rate setting is only a numerical requirement, which is difficult for operators to judge intuitively in actual operation. Most of them control the liquid flow rate based on experience, and there is a lack of specific operational specifications. This may lead to the oil loading speed being too fast in the early stage of loading and unloading, which will accumulate a large amount of static electricity in a short period of time. The static discharge will generate sparks, causing the oil tanker of the oil truck to catch fire, which poses a safety hazard.

[0003] The main reason for such safety issues is the inability to quantitatively detect the crude oil flow rate during loading and unloading. Therefore, developing a flow rate monitoring device suitable for well sites, with explosion-proof properties, a compact structure, and simple operation can significantly prevent such problems from occurring. Furthermore, if automatic flow rate control can be achieved, it can also effectively reduce the labor intensity of operators.

[0004] Patent CN212105851U discloses an unattended single-well oil extraction monitoring device, comprising a support frame. Infrared monitors and clamps are respectively installed at both ends of the support frame via connecting sleeves. A flow monitoring box is installed above the clamps. The other end of a connecting rod is installed in a swing arm sleeve on one side of a bushing. A flange plate is installed at the bottom of the bushing. This utility model features a support frame with connecting sleeves at both ends, facilitating the installation and removal of the infrared monitors and clamps. The flow monitoring box is also conveniently installed and removed from the clamps. A take-up reel is installed below the clamp via a wheel frame, and a cable is wound on the reel. This design facilitates power connection and distribution. The flow monitoring box allows for real-time monitoring of the amount of oil injected into the extraction tank, and the infrared monitor allows for monitoring of the surrounding environment of the single well. However, this patent lacks the detection and control of flow velocity.

[0005] The utility model of a crude oil flow rate sensor with patent number CN204101583U relates to the field of sensors, specifically a crude oil flow rate sensor for accurate measurement. It includes an oil pipe, with a measuring plate hinged to the top of the oil inlet end of the pipe. The free end of the measuring plate extends into the inner cavity of the oil pipe. A groove is provided on the top of the inner side of the oil pipe corresponding to the measuring plate, and a piezoelectric sensor with a spherical portion is disposed in this groove. This piezoelectric sensor has a spherical portion that contacts and engages with the measuring plate. Because of the piezoelectric sensor with its spherical portion, when crude oil flows through the oil pipe, it exerts pressure on the measuring plate. The measuring plate transmits this pressure to the spherical portion of the piezoelectric sensor, which converts the deformation of the spherical portion into an electrical signal. The change in this electrical signal can be converted into a change in crude oil flow rate, with a highly accurate result. While this patent can detect flow rate, it lacks control functionality and cannot solve the aforementioned problem.

[0006] Chinese patent application CN212617636U discloses an automatic, non-powered loading device for produced fluid from oil wells. This device includes an oil-gas separator, a heater, and a control cabinet. The oil-gas separator has a liquid inlet pipe fixedly connected to its left inlet, a heater fixedly installed at its bottom, and at least one drain pipe fixedly connected to its bottom outlet. The control cabinet's signal input is electrically connected to the liquid level gauge's signal output, and the control cabinet's signal output is electrically connected to the flow control valve's signal input. This utility model has a reasonable and compact structure, is easy to use, and adopts a skid-mounted structure, integrating gas-liquid separation, storage, heating, and non-powered quantitative loading functions. It meets regulatory requirements, solves safety hazards in the production process, and achieves automatic, quantitative submersible loading, ensuring safe production in oil fields. It features safety, labor-saving, simplicity, and high efficiency. However, this patent has a complex structure with numerous components and lacks a separate, easily disassembled flow rate monitoring and control system.

[0007] The existing technologies described above are significantly different from this utility model. A search reveals no literature of the XY category, thus this utility model possesses innovativeness. Since there is no solution in the existing technology to address the technical problem we seek to solve, we have invented a new single-well oil flow rate monitoring and control device. Utility Model Content

[0008] The purpose of this invention is to provide a single-well oil extraction velocity monitoring and control device that solves the practical problem of lack of effective quantitative control over crude oil flow rate during single-well oil extraction in well sites. Based on the principles of stepped and stepless control in automatic control, it achieves precise correction of crude oil flow rate.

[0009] The objective of this utility model can be achieved through the following technical measures: a single-well oil extraction flow rate monitoring and control device, which includes a well site oil storage tank, a flow rate control valve group, and a flow rate control visualization control cabinet. The well site oil storage tank and the flow rate control valve group are connected by a flange, and the flow rate control valve group is connected to the oil tanker truck by a flange. The flow rate control visualization control cabinet is connected to the flow rate control valve group.

[0010] The objective of this utility model can also be achieved through the following technical measures:

[0011] The single-well oil flow rate monitoring and control device also includes an oil inlet pipeline on the top of the oil storage tank and an inlet valve for the oil storage tank. The oil inlet pipeline on the top of the oil storage tank is connected to the right inlet of the oil storage tank at the site, and the inlet valve for the oil storage tank is installed on the oil inlet pipeline on the top of the oil storage tank.

[0012] The single-well oil flow rate monitoring and control device also includes an electric heater, which is installed at the bottom of the oil storage tank at the well site.

[0013] The single-well oil flow rate monitoring and control device also includes an oil outlet pipeline at the bottom of the oil storage tank and an oil outlet valve at the oil storage tank. The oil outlet pipeline at the bottom of the oil storage tank extends from the left inlet into the bottom of the oil storage tank at the well site, and the oil outlet valve at the bottom of the oil storage tank is installed on the oil outlet pipeline.

[0014] The single-well oil flow rate monitoring and control device also includes an oil storage tank outlet pipeline pressure sensor, which is installed on the oil outlet pipeline at the bottom of the oil storage tank and connected to the flow rate control visualization control cabinet, which supplies power to the device.

[0015] The single-well oil flow rate monitoring and control device also includes an oil storage tank level sensor, which is installed on the left side of the oil storage tank at the well site and connected to the flow rate control visualization control cabinet, which powers the device.

[0016] The flow rate control valve assembly includes an outlet SOV flow rate control valve, an outlet 20% flow rate control valve, an outlet 60% flow rate control valve, an outlet 80% flow rate control valve, and an outlet 40% flow rate control valve.

[0017] The SOV flow rate control valve at the outlet uses an electromagnetic ball valve.

[0018] The 20% flow rate control valve, 60% flow rate control valve, 80% flow rate control valve, and 40% flow rate control valve at the outlet are electromagnetic gate valves.

[0019] The flow rate control visualization control cabinet is connected to the outlet SOV flow rate control valve, the outlet 20% flow rate control valve, the outlet 60% flow rate control valve, the outlet 80% flow rate control valve, and the outlet 40% flow rate control valve, respectively. The outlet SOV flow rate control valve, the outlet 20% flow rate control valve, the outlet 60% flow rate control valve, the outlet 80% flow rate control valve, and the outlet 40% flow rate control valve are powered by the flow rate control visualization control cabinet.

[0020] This utility model presents a single-well oil flow rate monitoring and control device that integrates the monitoring and regulation of oil flow rate from the well site storage tank. Given a flow rate range, flow rate control can be achieved, realizing both flow rate acquisition and control based on a set flow rate. The two systems are integrated for synchronous acquisition and presentation. The flow rate monitoring module converts data collected by the pressure probe, given crude oil density, and pipe diameter into flow rate data, achieving stable, rapid, and accurate data collection. The flow rate monitoring module provides precise flow rate monitoring and promptly issues an alarm when the flow rate exceeds the limit. The flow rate control module, when the flow rate exceeds the high limit, controls the valve opening to achieve PID automatic control adjustment, opening a bypass to relieve pressure and reduce local friction, thereby controlling the filling flow rate. The entire device uses standard flange connections, allowing for quick disassembly and convenient installation, high efficiency in on-site modification, and strong applicability. The main purpose of this utility model is to solve the following four on-site problems:

[0021] 1. Since the oil filling port is at the bottom of the storage tank, the power of the pipe mainly comes from the self-pressure of the liquid level in the storage tank, which converts the static gravitational potential energy of the crude oil into the kinetic energy of the outlet fluid. The liquid level in the tank directly affects the oil output speed, so the flow rate will change continuously according to the liquid level.

[0022] 2. Single-well oil tanker trucks have specific speed requirements during oil loading operations. However, the flow rate changes continuously during loading, and operators cannot quantitatively control the crude oil flow rate. Without a speed measuring device to assist in sensing, there are significant safety hazards during operation, which can easily lead to unsafe consequences.

[0023] 3. The well site for single-well oil extraction is located in an explosion-proof area, making it difficult to provide power supply lines and requiring safe voltage.

[0024] 4. It should be easy to modify, have a simple structure, and be able to achieve unified functions of real-time speed monitoring and precise adjustment. Attached Figure Description

[0025] Figure 1 This is a structural diagram of a specific embodiment of the single-well oil flow rate monitoring and control device of this utility model;

[0026] Figure 2 This is a schematic diagram of a visual control cabinet in a specific embodiment of the present invention;

[0027] In the diagram: 1. Well site oil storage tank; 2. Electric heater; 3. Oil inlet pipeline at the top of the oil storage tank; 4. Oil outlet pipeline at the bottom of the oil storage tank; 5. Flow rate visualization control cabinet; 6. Flow rate control valve assembly; 7. Flange connecting the flow rate control valve assembly to the oil storage tank; 8. Outlet flange of the flow rate control valve assembly; 9. Inlet valve of the oil storage tank; 10. Outlet valve of the oil storage tank; 11. Oil level sensor of the oil storage tank; 12. Pressure sensor of the outlet pipeline of the oil storage tank; 13. Outlet SOV flow rate control valve; 14. Outlet 20% flow rate control valve; 15. Outlet 60% flow rate control valve; 16. Outlet 80% flow rate control valve; 17. Outlet 40% flow rate control valve. Detailed Implementation

[0028] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0029] In this utility model, for ease of description, the relative positional relationships of each component are described according to the layout of the accompanying drawings. For example, the positional relationships of front, back, top, bottom, left, right, etc., are determined according to the layout direction of the accompanying drawings.

[0030] This utility model discloses a single-well oil flow rate monitoring and control device, comprising a well site oil storage tank, a flow rate control valve assembly, and a flow rate control visualization control cabinet. The right inlet of the well site oil storage tank is fixedly connected to an oil inlet pipeline at the top of the tank, which is equipped with an inlet valve. An electric heater is fixedly installed at the bottom of the well site oil storage tank. A liquid level sensor is fixedly installed on the left side of the well site oil storage tank. An oil outlet pipeline extends from the left inlet into the bottom of the well site oil storage tank, and is equipped with an outlet valve and an outlet pipeline pressure sensor. The oil outlet pipeline is connected to the flow rate control valve assembly via a flange. The flow rate control valve assembly includes an outlet SOV flow rate control valve, an outlet 20% flow rate control valve, an outlet 60% flow rate control valve, an outlet 80% flow rate control valve, and an outlet 40% flow rate control valve. The outlet of the flow rate control valve assembly is connected to the tank truck via an outlet flange.

[0031] The aforementioned well site oil storage tanks, flow rate control valve assemblies, and oil loading tank trucks are connected by standard flanges, allowing for rapid disassembly and convenient installation, high efficiency in on-site modification, and strong applicability.

[0032] The outlet SOV flow control valve in the above-mentioned flow control valve group is a solenoid ball valve, and the outlet 20% flow control valve, outlet 60% flow control valve, outlet 80% flow control valve, and outlet 40% flow control valve are solenoid gate valves.

[0033] The aforementioned flow rate visualization control cabinet supplies power to the oil tank level sensor, the oil tank outlet pipeline pressure sensor, the outlet SOV flow rate control valve, the outlet 20% flow rate control valve, the outlet 60% flow rate control valve, the outlet 80% flow rate control valve, and the outlet 40% flow rate control valve.

[0034] The aforementioned visual control cabinet mainly includes displays of the oil level in the well site storage tank, pressure in the oil tank outlet pipeline, the on / off status of each valve in the flow rate control valve group, and the status of the 24V DC power supply.

[0035] The aforementioned flow velocity visualization control cabinet adopts an integrated control method, with internal programs written using a microcontroller and an explosion-proof outer casing. Based on Bernoulli's principle in fluid mechanics, it utilizes measuring instruments to digitally acquire field parameters and performs theoretical calculations of multiple parameters of the outlet pipeline flow velocity to achieve real-time online monitoring and control of the flow velocity of a single-well oil tanker during loading and unloading.

[0036] The aforementioned flow rate visualization control cabinet has a built-in microcontroller that enables electronic output of flow rate calculations. The display screen of the visualization control cabinet shows the digital liquid level reading from the oil tank level sensor, the digital pressure reading from the pressure sensor, and the flow rate reading obtained from the microcontroller's built-in algorithm. The calculated flow rate reading is the key to the device. At the same time, the set upper and lower limits of the flow rate alarm interlock can realize the flow rate deviation alarm and the interlock emergency shutdown of the outlet valve of the front-end oil tank.

[0037] In this invention, based on the stepped control and stepless sliding PID control methods in the automatic control principle, and using the parameter values ​​of the oil tank level sensor and the oil tank outlet pipeline pressure sensor as the basis, a flow rate control valve group is added to the rear end of the oil tank outlet valve. According to the flow rate monitoring data and the user-defined flow rate range, the flow rate visualization control cabinet automatically calculates the difference. Then, according to the difference flow rate and the user-defined flow rate ratio, the outlet 20% flow rate control valve, outlet 40% flow rate control valve, outlet 60% flow rate control valve, and outlet 80% flow rate control valve are automatically closed in sequence. Finally, the outlet SOV flow rate control valve is used for precise PID control, resulting in faster adjustment time and significantly improved adjustment accuracy.

[0038] This utility model discloses a single-well oil extraction flow rate monitoring and control device. It is easy to operate and connects safely and quickly via a standard flange. Previously, the flow rate was controlled by adjusting the opening of the operating valve to increase friction. This device can automatically adjust according to the flow rate. The flange connection allows for quick installation and can be widely used in single-well oil extraction sites. It eliminates unsafe behaviors that rely on experience during the oil loading process, eliminates safety hazards from the perspective of inherent safety, ensures the personal safety of workers, and reduces the labor intensity of employees.

[0039] The single-well oil extraction flow rate monitoring and control device of this utility model has a simple structure, is easy to install, and is a customized standard part. It can realize real-time quantitative display of flow rate during the single-well oil extraction process, and avoids fire and explosion accidents caused by static electricity due to excessive flow rate from an inherent safety perspective, effectively eliminating safety hazards and ensuring the safety of the entire operation.

[0040] The single-well oil flow rate monitoring and control device of this utility model adopts a four-valve group switching control and a single-valve SOV adjustment control. The entire adjustment process is more efficient, accurate and labor-saving. The entire flow rate correction process is within 5 seconds, which effectively avoids the instability of flow rate caused by the operator repeatedly opening and closing the inlet gate valve, and greatly reduces the labor intensity of the operator.

[0041] In a specific embodiment of the present invention, as shown in the appendix Figure 1 As shown, the single-well oil flow rate monitoring and control device includes a well site oil storage tank 1, a flow rate control valve group 6, and a flow rate visualization control cabinet 5. The right inlet of the well site oil storage tank 1 is fixedly connected to an oil inlet pipeline 3 at the top of the tank. An inlet valve 9 is installed on the oil inlet pipeline 3 at the top of the tank. An electric heater 2 is fixedly installed at the bottom of the well site oil storage tank 1. An oil level sensor 11 is fixedly installed on the left side of the well site oil storage tank 1. An oil outlet pipeline 4 extends from the left inlet into the bottom of the well site oil storage tank 1. An outlet valve 10 and an outlet pipeline pressure sensor 12 are installed on the oil outlet pipeline 4 at the bottom of the tank. The oil outlet pipeline 4 at the bottom of the oil storage tank is connected to the flow rate control valve assembly 6 via the flow rate control valve assembly and the oil storage tank connection flange 7. The flow rate control valve assembly 6 includes an outlet SOV flow rate control valve 13, an outlet 20% flow rate control valve 14, an outlet 60% flow rate control valve 15, an outlet 80% flow rate control valve 16, and an outlet 40% flow rate control valve 17. The outlet of the flow rate control valve assembly 6 is connected to the tank truck via the flow rate control valve assembly outlet flange 8.

[0042] As attached Figure 1 As shown, the flow rate control valve group 6 and the oil tank truck are connected to the oil storage tank 1, the oil flow rate control valve group 6 and the oil tank truck via the oil flow rate control valve group connecting flange 7 and the oil storage tank outlet flange 8, which are connected by standard flanges. This allows for quick disassembly and convenient installation, high efficiency in on-site modification, and strong applicability.

[0043] As attached Figure 1 As shown, the outlet SOV flow control valve 13 in the flow control valve group 6 is a solenoid ball valve, and the outlet 20% flow control valve 14, outlet 60% flow control valve 15, outlet 80% flow control valve 16, and outlet 40% flow control valve 17 are solenoid gate valves.

[0044] As attached Figure 1As shown, the flow rate visualization control cabinet 5 supplies power to the oil tank level sensor 11, the oil tank outlet pipeline pressure sensor 12, the outlet SOV flow rate control valve 13, the outlet 20% flow rate control valve 14, the outlet 60% flow rate control valve 15, the outlet 80% flow rate control valve 16, and the outlet 40% flow rate control valve 17.

[0045] As attached Figure 2 As shown, the visual control cabinet mainly includes the well site oil storage tank level display, the oil storage tank outlet pipeline pressure display, the flow rate control valve group valve switch status display, and the 24V DC power supply status display.

[0046] The aforementioned flow velocity visualization control cabinet 5 adopts an integrated control method. Its internal program is written using a microcontroller, and the entire unit is equipped with an explosion-proof enclosure. Based on Bernoulli's principle in fluid mechanics, it utilizes measuring instruments to digitally acquire field parameters and performs theoretical calculations of multiple parameters of the outlet pipeline flow velocity to achieve real-time online monitoring and control of the flow velocity during the loading and unloading process of a single-well oil tanker.

[0047] The aforementioned flow rate visualization control cabinet 5 has a built-in microcontroller, which can realize the electronic output of flow rate calculation. The display screen of the visualization control cabinet shows the digital liquid level reading of the oil tank level sensor 11, the digital pressure reading of the oil tank outlet pipeline pressure sensor 12, and the flow rate reading obtained by the built-in algorithm of the microcontroller. The calculated flow rate reading is the key of the device. At the same time, the set upper and lower limits of the flow rate alarm interlock can realize the flow rate deviation alarm and the interlock emergency shutdown of the front oil tank outlet valve 10.

[0048] In this invention, based on the stepped control and stepless sliding PID control methods in the automatic control principle, and using the parameter values ​​of the oil tank level sensor 11 and the oil tank outlet pipeline pressure sensor 12 as a basis, a flow rate control valve group 6 is added to the rear end of the oil tank outlet valve 10. According to the flow rate monitoring data and the user-defined flow rate range, the flow rate visualization control cabinet automatically calculates the difference. Then, according to the difference flow rate and the user-defined flow rate ratio, the outlet 20% flow rate control valve 14, outlet 40% flow rate control valve 17, outlet 60% flow rate control valve 15, and outlet 80% flow rate control valve 16 are automatically closed in sequence. Finally, the outlet SOV flow rate control valve 13 is used for precise PID control, resulting in faster adjustment time and significantly improved adjustment accuracy.

[0049] In this embodiment of the utility model, taking a set flow rate of 1±0.05m / s as an example, if the flow rate monitoring module displays a flow rate of 1.7m / s, the calculated difference is 70% of the set value. At this time, the 20%, 40%, and 60% flow rate control valves automatically close, and the flow rate drops to about 1.1m / s. Then, the outlet flow rate is adjusted by PID through the SOV flow rate control valve.

[0050] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0051] Except for the technical features described in the specification, all other technologies are known to those skilled in the art.

Claims

1. A single-well oil extraction velocity monitoring and control device, characterized in that, The single-well oil flow rate monitoring and control device includes a well site oil storage tank, a flow rate control valve group, and a flow rate control visualization control cabinet. The well site oil storage tank and the flow rate control valve group are connected by a flange, and the flow rate control valve group is connected to the oil loading tanker by a flange. The flow rate control visualization control cabinet is connected to the flow rate control valve group.

2. The single-well oil extraction velocity monitoring and control device according to claim 1, characterized in that, The single-well oil flow rate monitoring and control device also includes an oil inlet pipeline on the top of the oil storage tank and an inlet valve for the oil storage tank. The oil inlet pipeline on the top of the oil storage tank is connected to the right inlet of the oil storage tank at the site, and the inlet valve for the oil storage tank is installed on the oil inlet pipeline on the top of the oil storage tank.

3. The single-well oil extraction velocity monitoring and control device according to claim 1, characterized in that, The single-well oil flow rate monitoring and control device also includes an electric heater, which is installed at the bottom of the oil storage tank at the well site.

4. The single-well oil extraction velocity monitoring and control device according to claim 1, characterized in that, The single-well oil flow rate monitoring and control device also includes an oil outlet pipeline at the bottom of the oil storage tank and an oil outlet valve at the oil storage tank. The oil outlet pipeline at the bottom of the oil storage tank extends from the left inlet into the bottom of the oil storage tank at the well site, and the oil outlet valve at the bottom of the oil storage tank is installed on the oil outlet pipeline.

5. The single-well oil extraction velocity monitoring and control device according to claim 4, characterized in that, The single-well oil flow rate monitoring and control device also includes an oil storage tank outlet pipeline pressure sensor, which is installed on the oil outlet pipeline at the bottom of the oil storage tank and connected to the flow rate control visualization control cabinet, which supplies power to the device.

6. The single-well oil extraction velocity monitoring and control device according to claim 1, characterized in that, The single-well oil flow rate monitoring and control device also includes an oil storage tank level sensor, which is installed on the left side of the oil storage tank at the well site and connected to the flow rate control visualization control cabinet, which powers the device.

7. The single-well oil extraction velocity monitoring and control device according to claim 1, characterized in that, The flow rate control valve assembly includes an outlet SOV flow rate control valve, an outlet 20% flow rate control valve, an outlet 60% flow rate control valve, an outlet 80% flow rate control valve, and an outlet 40% flow rate control valve.

8. The single-well oil extraction velocity monitoring and control device according to claim 7, characterized in that, The SOV flow rate control valve at the outlet uses an electromagnetic ball valve.

9. The single-well oil extraction velocity monitoring and control device according to claim 7, characterized in that, The 20% flow rate control valve, 60% flow rate control valve, 80% flow rate control valve, and 40% flow rate control valve at the outlet are electromagnetic gate valves.

10. The single-well oil extraction velocity monitoring and control device according to claim 7, characterized in that, The flow rate control visualization control cabinet is connected to the outlet SOV flow rate control valve, the outlet 20% flow rate control valve, the outlet 60% flow rate control valve, the outlet 80% flow rate control valve, and the outlet 40% flow rate control valve, respectively. The outlet SOV flow rate control valve, the outlet 20% flow rate control valve, the outlet 60% flow rate control valve, the outlet 80% flow rate control valve, and the outlet 40% flow rate control valve are powered by the flow rate control visualization control cabinet.

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