Multi-phase flow metering and detecting device for oil well

Abstract

The invention relates to the technical field of petroleum equipment, in particular to an oil well multiphase flow metering and detecting device. Comprising a liquid inlet, a gas-liquid separation cylinder, a gas pipe, a gas amount detection cavity, a gas amount detector, a manual valve, a gas-liquid mixing pipe, a liquid outlet, a moisture content detector, a liquid pipe, a sewage discharge pressure relief opening, a liquid amount detection cavity, a liquid amount detector, an electromagnetic valve, a hydrogen sulfide gas detection cavity, a one-way gas valve, a hydrogen sulfide gas detector, a warning lamp, a motor assembly and a motor push rod assembly. The device can be used for measuring associated gas and liquid-phase substances in crude oil by sections, can be used for determining whether to detect hydrogen sulfide gas in the associated gas in the crude oil or not according to actual detection requirements, and has the characteristics of simple structure, stability in operation and convenience in use.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum equipment, and in particular to an oil well multiphase flow metering and detection device. Background Art

[0002] The existing oil well multiphase flow metering and detection devices have certain limitations in accuracy and stability, especially in complex multiphase flow environments, it is difficult to accurately detect and measure fluids of different phases. In order to solve this problem, a new oil well multiphase flow metering and detection device is proposed, which has higher accuracy and stability. Summary of the invention

[0003] In order to solve the above technical problems and realize the above technical features, the present invention adopts the following technical solutions: An oil well multiphase flow metering and detection device, comprising a liquid inlet, a gas-liquid separation cylinder, an air pipe, a gas volume detection chamber, a gas volume detector, a manual valve, a gas-liquid mixing pipe, a liquid outlet, a water content detector, a liquid pipe, a sewage pressure relief port, a liquid volume detection chamber, a liquid volume detector, a solenoid valve, a hydrogen sulfide gas detection chamber, a one-way air valve, a hydrogen sulfide gas detector, a warning light, a motor assembly, and a motor push rod assembly. The liquid inlet is the entrance for crude oil to enter the device; the gas-liquid separation cylinder is connected to the liquid inlet, and the gas-liquid separation cylinder is used to separate liquid phase substances and associated gases in crude oil; the air pipe is a flow channel for crude oil associated gas, and the air pipe includes air pipe section A and air pipe B. Section A of the gas pipe is connected to the top of the gas-liquid separation cylinder, the solenoid valve, and the gas volume detection chamber respectively; the gas volume detection chamber is connected to Section A of the gas pipe and Section C of the gas pipe respectively, and the gas volume detection chamber is the detection area of ​​the crude oil associated gas flow; the gas volume detector is located at the top of the gas volume detection chamber, and the gas volume detector is used to detect the instantaneous flow and cumulative flow of the crude oil associated gas; the manual valve is connected to Section C of the gas pipe, and the manual valve is used to control the crude oil associated gas through Section C of the gas pipe; the gas-liquid mixing tube is connected to the liquid volume detection chamber and Section C of the gas pipe respectively, and the gas-liquid mixing tube is the passage between the liquid phase of the crude oil and the associated gas; the liquid outlet is connected to the gas-liquid mixing The liquid outlet is the outlet for the crude oil to be discharged from the device; the water content detector is arranged at the lower part of the gas-liquid separation cylinder, and the water content detector is used to detect the water content data of the liquid phase of the crude oil; the liquid pipe is connected to the bottom of the gas-liquid separation cylinder, and the liquid pipe is the flow channel of the liquid phase of the crude oil; the sewage discharge pressure relief port is located in the middle of the liquid pipe, and the sewage discharge pressure relief port is used to release the pressure and impurities in the pipeline of the device; the liquid volume detection chamber is respectively connected to the liquid pipe and the gas-liquid mixing pipe, and the liquid volume detection chamber is the detection area of ​​the flow rate of the liquid phase of the crude oil; the liquid volume detector is located at the top of the liquid volume detection chamber, and the liquid volume detector is used to detect the instantaneous liquid phase of the crude oil Flow rate and cumulative flow rate; the solenoid valve is respectively connected to the air pipe section A and the hydrogen sulfide gas detection chamber, and the solenoid valve is used to control the crude oil associated gas to enter the hydrogen sulfide gas detection chamber; the hydrogen sulfide gas detection chamber is respectively connected to the solenoid valve, the air pipe section B, and the motor push rod assembly, and the hydrogen sulfide gas detection chamber is the detection area for the crude oil associated gas to detect whether hydrogen sulfide gas exists; the one-way gas valve is connected to the hydrogen sulfide gas detection chamber, and the one-way gas valve is used to allow external air to enter the hydrogen sulfide gas detection chamber in one direction; the hydrogen sulfide gas detector is connected to the hydrogen sulfide gas detection chamber, and the hydrogen sulfide gas detector is used to detect whether the crude oil associated gas contains hydrogen sulfide gas.

[0004] Furthermore, the hydrogen sulfide gas detector is provided with a warning light, and when hydrogen sulfide gas is detected in the associated gas of crude oil, the warning light comes on.

[0005] Furthermore, the motor push rod assembly is connected to the motor assembly, and the motor assembly controls the motor push rod assembly to perform push-pull movements. The motor assembly drives the motor push rod assembly to perform push-pull movements to extract the crude oil associated gas with the hydrogen sulfide gas to be tested into the hydrogen sulfide gas detection chamber and discharge the crude oil associated gas with the tested hydrogen sulfide gas out of the hydrogen sulfide gas detection chamber.

[0006] Furthermore, the hydrogen sulfide gas detector, gas volume detector, liquid volume detector, and water content detector are all provided with LED display screens on the outside.

[0007] Furthermore, the hydrogen sulfide gas detector, gas volume detector, liquid volume detector, and water content detector are all equipped with a microprocessor, a data storage unit, and a signal transmission unit. The microprocessor is used to analyze data, the data storage unit is used to store data, and the signal transmission unit is used to send data.

[0008] The beneficial effects of the present invention are as follows: when an oil well multiphase flow metering and detection device is in working state, crude oil flows into the gas-liquid separation cylinder through the liquid inlet, and the crude oil completes the separation of the crude oil liquid phase substance and the associated gas in the gas-liquid separation cylinder. When the crude oil liquid phase substance passes through the lower part of the gas-liquid separation cylinder, the water content data of the crude oil liquid phase substance can be measured by using the water content detector, and the liquid phase substance with the measured crude oil water content data flows into the liquid quantity detection chamber through the liquid pipe connected to the bottom of the gas-liquid separation cylinder, and the instantaneous liquid phase substance of the crude oil can be measured by using the liquid quantity detector provided on the top of the liquid quantity detection chamber. The instantaneous flow rate and cumulative flow rate are measured. The crude oil liquid phase material with measured instantaneous flow rate and cumulative flow rate passes through the gas-liquid mixing tube and is discharged through the liquid outlet; the crude oil associated gas enters the gas volume detection chamber through the gas pipe section A connected to the top of the gas-liquid separation cylinder. The instantaneous flow rate and cumulative flow rate of the crude oil associated gas can be measured by the gas volume detector installed on the top of the gas volume detection chamber. The crude oil associated gas with measured instantaneous flow rate and cumulative flow rate passes through the gas pipe section C connected to the gas volume detection chamber through the manual valve passage, the gas-liquid mixing tube, and the liquid outlet. If it is necessary to use this device to detect the associated gas of crude oil When the oil contains hydrogen sulfide gas, the solenoid valve is adjusted to the passage state, and the crude oil associated gas enters the hydrogen sulfide gas detection chamber through the solenoid valve passage. In order to effectively detect the crude oil associated gas in the hydrogen sulfide gas detection chamber, the motor assembly is required to drive the motor push rod assembly to push and pull, and the crude oil associated gas is extracted into the hydrogen sulfide gas detection chamber by the pulling stroke of the motor push rod assembly. At the same time, the one-way gas valve introduces the outside air into the hydrogen sulfide gas detection chamber in one direction, which can prevent the gas pressure difference inside and outside the hydrogen sulfide gas detection chamber from causing the crude oil associated gas to enter the hydrogen sulfide gas detection chamber. Gas cannot be extracted into the hydrogen sulfide gas detection chamber. The crude oil associated gas entering the hydrogen sulfide gas detection chamber can be detected by a hydrogen sulfide gas detector to determine whether the crude oil associated gas contains hydrogen sulfide gas. If it contains hydrogen sulfide gas, the warning light will be on. The crude oil associated gas that has completed the hydrogen sulfide gas detection is discharged to the gas pipe section B connected to the hydrogen sulfide gas detection chamber by the motor push rod assembly. The crude oil associated gas that has completed the hydrogen sulfide gas detection flows through the gas pipe section B, gas pipe section C, manual valve passage, gas-liquid mixing pipe, and liquid outlet for discharge. An oil well multiphase flow metering and detection device can realize the partial measurement of associated gas and liquid phase substances in crude oil through the above-mentioned operation conditions, and can decide whether to detect the presence of hydrogen sulfide gas in crude oil associated gas according to actual detection needs. The device has the characteristics of simple structure, stable operation, and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The present invention is a three-dimensional structural schematic diagram of an oil well multiphase flow metering and detection device.

[0010] In the figure: 1-liquid inlet, 2-gas-liquid separation cylinder, 3-air pipe section A, 4-gas volume detection chamber, 5-gas volume detector, 6-air pipe section C, 7-manual valve, 8-gas-liquid mixing tube, 9-liquid outlet, 10-water content detector, 11-liquid pipe, 12-sewage pressure relief port, 13-liquid volume detection chamber, 14-liquid volume detector, 15-solenoid valve, 16-hydrogen sulfide gas detection chamber, 17-one-way gas valve, 18-hydrogen sulfide gas detector, 19-warning light, 20-motor assembly, 21-motor push rod assembly, 22-air pipe section B. DETAILED DESCRIPTION

[0011] The embodiment of the present invention provides an oil well multiphase flow metering and detection device, such as Figure 1As shown, an oil well multiphase flow metering and detection device comprises a liquid inlet 1, a gas-liquid separation cylinder 2, an air pipe A section 3, a gas volume detection chamber 4, a gas volume detector 5, an air pipe C section 6, a manual valve 7, a gas-liquid mixing pipe 8, a liquid outlet 9, a water content detector 10, a liquid pipe 11, a sewage pressure relief port 12, a liquid volume detection chamber 13, a liquid volume detector 14, a solenoid valve 15, a hydrogen sulfide gas detection chamber 16, a one-way gas valve 17, a hydrogen sulfide gas detector 18, a warning light 19, a motor assembly 20, a motor push rod assembly 21, and an air pipe B section 22. The liquid inlet 1 is the entrance for crude oil to enter the device; the gas-liquid separation cylinder 2 is connected to the liquid inlet 1, and the gas-liquid separation cylinder 2 is used to separate liquid phase substances and associated gases in crude oil; The gas pipe is a passage through which the crude oil associated gas flows, and the gas pipe includes the gas pipe section A 3, the gas pipe section B 22, and the gas pipe section C 6; the gas pipe section A 3 is respectively connected to the top of the gas-liquid separation cylinder 2, the solenoid valve 15, and the gas volume detection chamber 4; the gas volume detection chamber 4 is respectively connected to the gas pipe section A 3 and the gas pipe section C 6, and the gas volume detection chamber 4 is the detection area for the flow of the crude oil associated gas; the gas volume detector 5 is located at the top of the gas volume detection chamber 4, and the gas volume detector 5 is used to detect the instantaneous flow and cumulative flow of the crude oil associated gas; the manual valve 7 is connected to the gas pipe section C 6, and the manual valve 7 is used to control the crude oil associated gas to pass through the gas pipe section C 6; the gas-liquid mixing tube 8 is respectively connected to the liquid volume detection chamber 13 and the gas pipe section C 6, The gas-liquid mixing tube 8 is a passage for the liquid phase of crude oil and the associated gas; the liquid outlet 9 is connected to the gas-liquid mixing tube 8, and the liquid outlet 9 is the outlet for the crude oil to be discharged from the device; the water content detector 10 is arranged at the lower part of the gas-liquid separation cylinder 2, and the water content detector 10 is used to detect the water content data of the liquid phase of crude oil; the liquid pipe 11 is connected to the bottom of the gas-liquid separation cylinder 2, and the liquid pipe 11 is the flow channel of the liquid phase of crude oil; the sewage discharge pressure relief port 12 is located in the middle of the liquid pipe 11, and the sewage discharge pressure relief port 12 is used to release the pressure and impurities in the pipeline of the device; the liquid volume detection chamber 13 is respectively connected to the liquid pipe 11 and the gas-liquid mixing tube 8, and the liquid volume detection chamber 13 is the detection area of ​​the flow rate of the liquid phase of crude oil domain; the liquid quantity detector 14 is located at the top of the liquid quantity detection chamber 13, and the liquid quantity detector 14 is used to detect the instantaneous flow rate and cumulative flow rate of the crude oil liquid phase material; the solenoid valve 15 is respectively connected to the air pipe A section 3 and the hydrogen sulfide gas detection chamber 16, and the solenoid valve 15 is used to control the crude oil associated gas to enter the hydrogen sulfide gas detection chamber 16; the hydrogen sulfide gas detection chamber 16 is respectively connected to the solenoid valve 15, the air pipe B section 22, and the motor push rod assembly 21, and the hydrogen sulfide gas detection chamber 16 is the detection area for the crude oil associated gas to detect whether hydrogen sulfide gas exists; the one-way gas valve 17 is connected to the hydrogen sulfide gas detection chamber 16, and the one-way gas valve 17 is used to allow the outside air to enter the hydrogen sulfide gas detection chamber 16 in one direction;The hydrogen sulfide gas detector 18 is connected to the hydrogen sulfide gas detection chamber 16, and the hydrogen sulfide gas detector 18 is used to detect whether the crude oil associated gas contains hydrogen sulfide gas; the hydrogen sulfide gas detector 18 is provided with a warning light 19, and when the crude oil associated gas contains hydrogen sulfide gas, the warning light 19 lights up; the motor push rod assembly 21 is connected to the motor assembly 20, and the motor assembly 20 controls the motor push rod assembly 21 to do push-pull movement, and the motor assembly 20 drives the motor push rod assembly 21 to do push-pull movement to realize the detection of the crude oil associated gas of the hydrogen sulfide gas to be detected. The crude oil associated gas extracted into the hydrogen sulfide gas detection chamber 16 and the detected hydrogen sulfide gas is discharged from the hydrogen sulfide gas detection chamber 16; the hydrogen sulfide gas detector 18, the gas volume detector 5, the liquid volume detector 14, and the water content detector 10 are all provided with LED display screens on the outside; the hydrogen sulfide gas detector 18, the gas volume detector 5, the liquid volume detector 14, and the water content detector 10 are all provided with microprocessors, data storage units, and signal transmission units inside, wherein the microprocessor is used to analyze data, the data storage unit is used to store data, and the signal transmission unit is used to send data. ;

[0012] In an embodiment of the present invention, when a multiphase flow metering and detecting device for an oil well is in working state, crude oil flows into a gas-liquid separation cylinder 2 through a liquid inlet 1, and the crude oil completes the separation of the crude oil liquid phase substance and the associated gas in the gas-liquid separation cylinder 2. When the crude oil liquid phase substance passes through the lower part of the gas-liquid separation cylinder 2, the water content data of the crude oil liquid phase substance can be measured by a water content detector 10. The liquid phase substance for which the water content data of the crude oil has been measured flows into a liquid quantity detection chamber 13 through a liquid pipe 11 connected to the bottom of the gas-liquid separation cylinder 2. The instantaneous flow rate and the flow rate of the crude oil liquid phase substance can be measured by a liquid quantity detector 14 provided at the top of the liquid quantity detection chamber 13. Cumulative flow, the crude oil liquid phase material with measured instantaneous flow and cumulative flow passes through the gas-liquid mixing tube 8 and is discharged through the liquid outlet 9; the crude oil associated gas enters the gas volume detection chamber 4 through the gas pipe A section 3 connected to the top of the gas-liquid separation cylinder 2, and the instantaneous flow and cumulative flow of the crude oil associated gas can be measured by the gas volume detector 5 provided on the top of the gas volume detection chamber 4. The crude oil associated gas with measured instantaneous flow and cumulative flow passes through the gas pipe C section 6 connected to the gas volume detection chamber 4, through the manual valve 7 passage, the gas-liquid mixing tube 8, and the liquid outlet 9. If it is necessary to use this device to detect whether the crude oil associated gas contains hydrogen sulfide When the gas is detected, the solenoid valve 15 is adjusted to the passage state, and the crude oil associated gas enters the hydrogen sulfide gas detection chamber 16 through the passage of the solenoid valve 15. In order to effectively detect the crude oil associated gas in the hydrogen sulfide gas detection chamber 16, the motor assembly 20 is required to drive the motor push rod assembly 21 to do push-pull movement, and the motor push rod assembly 21 is used to pull the stroke to extract the crude oil associated gas into the hydrogen sulfide gas detection chamber 16. At the same time, the one-way gas valve 17 introduces the outside air into the hydrogen sulfide gas detection chamber 16 in a one-way manner, which can prevent the gas pressure difference inside and outside the hydrogen sulfide gas detection chamber 16 from causing the crude oil associated gas to be unable to be detected. The crude oil associated gas extracted into the hydrogen sulfide gas detection chamber 16 and entering the hydrogen sulfide gas detection chamber 16 can be detected by the hydrogen sulfide gas detector 18 to see whether the crude oil associated gas contains hydrogen sulfide gas. If it contains hydrogen sulfide gas, the warning light 19 will light up. The crude oil associated gas that has completed the hydrogen sulfide gas detection is pushed and discharged to the gas pipe section B 22 connected to the hydrogen sulfide gas detection chamber 16 by the motor push rod assembly 21. The crude oil associated gas that has completed the hydrogen sulfide gas detection flows through the gas pipe section B 22, the gas pipe section C 6, the manual valve 7 passage, the gas-liquid mixing pipe 8, and the liquid outlet 9. A multiphase flow metering and detection device for oil wells can realize the partial measurement of the associated gas and liquid phase substances in the crude oil through the above operation, and can decide whether to detect the hydrogen sulfide gas in the crude oil associated gas according to the actual detection needs.

[0013] The above are preferred embodiments of the present invention. It should be pointed out that a person skilled in the art may make several improvements and modifications without departing from the principles of the invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An oil well multiphase flow metering and detection device, characterized in that: It includes a liquid inlet, a gas-liquid separation cylinder, an air pipe, a gas volume detection chamber, a gas volume detector, a manual valve, a gas-liquid mixing pipe, a liquid outlet, a water content detector, a liquid pipe, a sewage pressure relief port, a liquid volume detection chamber, a liquid volume detector, a solenoid valve, a hydrogen sulfide gas detection chamber, a one-way air valve, a hydrogen sulfide gas detector, a warning light, a motor assembly, and a motor push rod assembly. The liquid inlet is the entrance for crude oil to enter the device; the gas-liquid separation cylinder is connected to the liquid inlet, and the gas-liquid separation cylinder is used to separate the liquid phase substance and the associated gas in the crude oil; the air pipe is the flow channel of the crude oil associated gas, and the air pipe includes air pipe section A, air pipe section B, and air pipe section C; the air pipe Section A is respectively connected to the top of the gas-liquid separation cylinder, the solenoid valve, and the gas volume detection chamber; the gas volume detection chamber is respectively connected to section A of the gas pipe and section C of the gas pipe, and the gas volume detection chamber is the detection area for the flow of crude oil associated gas; the gas volume detector is located at the top of the gas volume detection chamber, and the gas volume detector is used to detect the instantaneous flow and cumulative flow of crude oil associated gas; the manual valve is connected to section C of the gas pipe, and the manual valve is used to control the crude oil associated gas through section C of the gas pipe; the gas-liquid mixing tube is respectively connected to the liquid volume detection chamber and section C of the gas pipe, and the gas-liquid mixing tube is the passage between the liquid phase of crude oil and the associated gas; the liquid outlet is connected to the gas-liquid mixing tube, and the liquid outlet It is the outlet for crude oil to be discharged from this device; the water content detector is arranged at the lower part of the gas-liquid separation cylinder, and the water content detector is used to detect the water content data of the liquid phase of the crude oil; the liquid pipe is connected to the bottom of the gas-liquid separation cylinder, and the liquid pipe is the flow channel of the liquid phase of the crude oil; the sewage discharge pressure relief port is located in the middle of the liquid pipe, and the sewage discharge pressure relief port is used to release the pressure and impurities in the pipeline of this device; the liquid volume detection chamber is respectively connected to the liquid pipe and the gas-liquid mixing pipe, and the liquid volume detection chamber is the detection area of ​​the flow rate of the liquid phase of the crude oil; the liquid volume detector is located at the top of the liquid volume detection chamber, and the liquid volume detector is used to detect the instantaneous flow rate and Accumulated flow; the solenoid valve is respectively connected to the air pipe section A and the hydrogen sulfide gas detection chamber, and the solenoid valve is used to control the crude oil associated gas to enter the hydrogen sulfide gas detection chamber; the hydrogen sulfide gas detection chamber is respectively connected to the solenoid valve, the air pipe section B, and the motor push rod assembly, and the hydrogen sulfide gas detection chamber is the detection area for the crude oil associated gas to detect whether hydrogen sulfide gas exists; the one-way gas valve is connected to the hydrogen sulfide gas detection chamber, and the one-way gas valve is used to allow external air to enter the hydrogen sulfide gas detection chamber in one direction; the hydrogen sulfide gas detector is connected to the hydrogen sulfide gas detection chamber, and the hydrogen sulfide gas detector is used to detect whether the crude oil associated gas contains hydrogen sulfide gas.

2. The oil well multiphase flow metering and detection device according to claim 1, characterized in that: The hydrogen sulfide gas detector is provided with a warning light, and when hydrogen sulfide gas is detected in the associated gas of crude oil, the warning light comes on.

3. The oil well multiphase flow metering and detection device according to claim 1, characterized in that: The motor push rod assembly is connected to the motor assembly, and the motor assembly controls the motor push rod assembly to perform push-pull movements. The motor assembly drives the motor push rod assembly to perform push-pull movements to extract the crude oil associated gas with the hydrogen sulfide gas to be tested into the hydrogen sulfide gas detection chamber and to discharge the crude oil associated gas with the tested hydrogen sulfide gas out of the hydrogen sulfide gas detection chamber.

4. The oil well multiphase flow metering and detection device according to claim 1, characterized in that: The hydrogen sulfide gas detector, gas volume detector, liquid volume detector and water content detector are all provided with LED display screens on the outside.

5. The oil well multiphase flow metering and detection device according to claim 1, characterized in that: The hydrogen sulfide gas detector, gas volume detector, liquid volume detector, and water content detector are all equipped with a microprocessor, a data storage unit, and a signal transmission unit. The microprocessor is used to analyze data, the data storage unit is used to store data, and the signal transmission unit is used to send data.

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