Oil well intelligent dosing and casing pressure control integrated linkage device

Abstract

An integrated linkage device for intelligent chemical feeding and casing pressure control of an oil well belongs to the technical field of chemical feeding and casing pressure control of an oil well inlet, the linkage device is arranged on a wellhead, a monitoring pipeline is arranged on the wellhead, the linkage device comprises a chemical feeding system and a PLC (programmable logic controller), and the monitoring pipeline is connected with the chemical feeding system through the PLC. The medicine adding system comprises a medicine storage box, a filter, an injection pump, a second pressure sensor, a safety valve and a one-way valve, medicine liquid is arranged in the medicine storage box, and the liquid level of the medicine liquid in the medicine storage box is monitored through a PLC; an output pipeline is arranged on the pesticide storage box, the other end of the output pipeline is connected to a wellhead, and a filter, an injection pump, a safety valve, a one-way valve and a second pressure sensor are sequentially arranged on the output pipeline from the output end of the pesticide storage box; the problems that two independent systems are adopted for common oil well dosing and casing pressure control, the service life is short, stability is poor, linkage is poor, and frequent maintenance is needed in a complex environment are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil well inlet dosing and casing pressure control, and specifically relates to an integrated linkage device for intelligent dosing and casing pressure control of an oil well. Background Art

[0002] Generally, for the complex climate environment of the temperate continental monsoon climate, the spring is dry and rainy, and the temperature rises quickly; the summer is hot and the precipitation is concentrated; the autumn is cool, the temperature changes quickly, and the temperature difference is large; the winter is long, cold and dry. It is windy all year round, and the southwest wind is dominant in spring, summer and autumn, with the maximum wind force reaching level 7 or 8. The annual average temperature is 4.5℃, the lowest temperature is -37.8℃, and the highest temperature is 36.9℃. The annual average sunshine is 2879 hours, the frost-free period is about 140 days, and the soil freezing period is 214 days. The annual precipitation is between 400 and 500mm, and the summer rainfall is concentrated in July and August, accounting for 72% of the annual precipitation. The winter is long, the snowfall is small, cold and dry, and it is windy all year round, especially in spring when the wind is strong and abundant. The dosing and casing pressure control equipment in oil wells must adapt to their respective environmental conditions; the existing dosing equipment and casing pressure control equipment are used separately. In the past, the casing pressure control device and the dosing device were two independent devices. In such a complex environment, the existing equipment has a short service life and poor stability. When the casing control is running, the liquid medicine fails to meet the design requirements and is recovered into the gathering and transportation system along with the fluid pressure relief in the casing, which affects the dosing effect. Summary of the invention

[0003] In order to solve the problem of low pipe string installation efficiency during pipe lifting and lowering operations, the present invention proposes: an integrated linkage device for intelligent drug addition and casing pressure control in oil wells, the linkage device is arranged on the wellhead, and a monitoring pipeline is arranged on the wellhead, including a drug addition system and a PLC controller, and the monitoring pipeline is connected to the drug addition system through the PLC controller.

[0004] Further, the dosing system includes a medicine storage box, a filter, an injection pump, a second pressure sensor, a safety valve and a one-way valve. The medicine storage box is provided with a medicine liquid, and a liquid level meter is provided in the medicine storage box. The liquid level meter is connected to a PLC controller, and the liquid level of the medicine liquid in the medicine storage box is monitored by the PLC controller; an output pipeline is provided on the medicine storage box, the other end of the output pipeline is connected to the wellhead, and the output pipeline is provided with a filter, an injection pump, a safety valve, a one-way valve and a second pressure sensor in sequence from the output end of the medicine storage box;

[0005] Furthermore, the heater is arranged in the medicine storage box, and the heater is connected to the PLC controller, and the medicine liquid in the medicine storage box is heated by the heater;

[0006] Furthermore, the second pressure sensor is connected to the PLC controller, and the pressure at the output end of the output pipeline is monitored by the second pressure sensor;

[0007] Furthermore, a first pressure sensor and a temperature sensor are provided on the monitoring pipeline, and the first pressure sensor and the temperature sensor are connected to a PLC controller.

[0008] Furthermore, the pressure and temperature of the monitoring pipeline at the wellhead are monitored respectively by a first pressure sensor and a temperature sensor; the monitoring pipeline is arranged in parallel with the output pipeline, and an electric valve is also arranged on the monitoring pipeline, and the electric valve is connected to the PLC controller, and the opening and closing of the electric valve are controlled by the PLC controller.

[0009] Furthermore, the dosing system and the PLC controller are connected to the enterprise cloud as a whole through data interaction to achieve remote control of the dosing system.

[0010] Furthermore, the PLC controller is connected to the injection pump and controls the running time of the injection pump according to the flow rate of the output pipeline.

[0011] The beneficial effects of the present invention are as follows: the present invention integrates the dosing equipment and the casing pressure control equipment and can be linked; the main linkage point is: when the casing pressure is too high, the control system will simultaneously issue a command to open the pressure relief electric valve and stop the dosing pump from adding medicine.

[0012] The invention solves the problem that two independent systems are used for general oil well drug addition and casing pressure control, which have short service life, poor stability, poor linkage and need for frequent maintenance in complex environments.

[0013] In the present invention, the dosing system and the PLC controller are integrated as a whole, which can realize cloud control and cloud monitoring; the overall stable linkage is achieved through the PLC controller; there is no need for separate control, which ensures the linkage effect, while meeting the service life requirements in complex environments and improving the overall stability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A front view of an embodiment of a pipe string transporting device and a pipe lowering method according to the present invention is shown. DETAILED DESCRIPTION

[0015] An integrated linkage device for intelligent drug addition and casing pressure control in oil wells, such as Figure 1 As shown, the linkage device is arranged on the wellhead, and a monitoring pipeline is arranged on the wellhead, including a dosing system and a PLC controller, and the monitoring pipeline is connected to the dosing system through the PLC controller.

[0016] Among them, the dosing system includes a medicine storage box, a filter, an injection pump, a second pressure sensor, a safety valve and a one-way valve. The medicine storage box is filled with medicine liquid, and a liquid level gauge is provided in the medicine storage box. The liquid level gauge is connected to the PLC controller, and the liquid level of the medicine liquid in the medicine storage box is monitored by the PLC controller; an output pipe is provided on the medicine storage box, the other end of the output pipe is connected to the wellhead, and a filter, an injection pump, a safety valve, a one-way valve and a second pressure sensor are sequentially provided on the output pipe from the output end of the medicine storage box.

[0017] Wherein, the heater is arranged in the medicine storage box, and the heater is connected to the PLC controller, and the medicine liquid in the medicine storage box is heated by the heater.

[0018] Wherein, the second pressure sensor is connected to the PLC controller, and the pressure at the output end of the output pipeline is monitored by the second pressure sensor.

[0019] Wherein, a first pressure sensor and a temperature sensor are arranged on the monitoring pipeline, and the first pressure sensor and the temperature sensor are connected to the PLC controller.

[0020] Among them, the pressure and temperature of the monitoring pipeline at the wellhead are monitored respectively by the first pressure sensor and the temperature sensor; the monitoring pipeline is arranged in parallel with the output pipeline, and an electric valve is also arranged on the monitoring pipeline, and the electric valve is connected to the PLC controller, and the opening and closing of the electric valve are controlled by the PLC controller.

[0021] The dosing system and the PLC controller are connected to the enterprise cloud as a whole through data interaction to achieve remote control of the dosing system.

[0022] Wherein, the PLC controller is connected to the injection pump and controls the running time of the injection pump according to the flow rate of the output pipeline.

[0023] The next figure of the one-way valve is the pressure sensor 1

[0024] From the diagram, the dosing system is as follows: the water comes out of the tank, is filtered by the filter, and then the injection pump provides power to flow through the safety valve, the one-way valve, the pressure sensor 1 and is injected into the wellhead

[0025] The PLC controller is connected to the heater, level gauge, electric valve, first pressure sensor, second pressure sensor, and temperature sensor to transmit signals.

[0026] The working principle of the present invention is: the casing pressure is controlled within a certain range by means of a casing control device, and under low casing pressure conditions, the electric valve is closed to achieve sealed quantitative addition of the agent.

[0027] Electric valve control:

[0028] If the measured value of pressure sensor 1 is higher than 2.5MPa, turn off the injection pump, open the electric valve and release the pressure.

[0029] Injection pump control:

[0030] Timing mode: control the injection time each time; control the running time each time;

[0031] Time control: daily timing control, control the operation of the pump at a fixed time point;

[0032] The software inputs the flow rate, and the PLC controller automatically converts the pump running time through the built-in algorithm;

[0033] Liquid level control: The upper and lower limits of the medicine box and the percentage of the internal medicine volume can be calculated and displayed in real time, and can cooperate with the pump linkage to provide a trigger point for the pump operation;

[0034] The running status of the pump can be displayed, and a comprehensive judgment can be made based on the medicine quantity and pressure sensor in the medicine box;

[0035] Realize remote transmission and control of cloud data of each device, and remote login to the cloud can check the dosing status of each device in real time.

[0036] The present invention integrates the dosing equipment and the casing pressure control equipment and can be linked together; the main linkage point is: when the casing pressure is too high, the control system will simultaneously issue instructions to open the pressure relief electric valve and stop the dosing pump from adding medicine.

[0037] The invention solves the problem that two independent systems are used for general oil well drug addition and casing pressure control, which have short service life, poor stability, poor linkage and need for frequent maintenance in complex environments.

[0038] In the present invention, the dosing system and the PLC controller are integrated as a whole, which can realize cloud control and cloud monitoring; the overall stable linkage is achieved through the PLC controller; there is no need for separate control, which ensures the linkage effect, while meeting the service life requirements in complex environments and improving the overall stability of use.

[0039] An integrated linkage device for intelligent drug addition and casing pressure control in oil wells, such as Figure 1 As shown, the linkage device is arranged on the wellhead, and a monitoring pipeline is arranged on the wellhead, including a dosing system and a PLC controller, and the monitoring pipeline is connected to the dosing system through the PLC controller.

[0040] Among them, the dosing system includes a medicine storage box, a filter, an injection pump, a second pressure sensor, a safety valve and a one-way valve. The medicine storage box is filled with medicine liquid, and a liquid level gauge is provided in the medicine storage box. The liquid level gauge is connected to the PLC controller, and the liquid level of the medicine liquid in the medicine storage box is monitored by the PLC controller; an output pipe is provided on the medicine storage box, the other end of the output pipe is connected to the wellhead, and a filter, an injection pump, a safety valve, a one-way valve and a second pressure sensor are sequentially provided on the output pipe from the output end of the medicine storage box.

[0041] Wherein, the heater is arranged in the medicine storage box, and the heater is connected to the PLC controller, and the medicine liquid in the medicine storage box is heated by the heater.

[0042] Wherein, the second pressure sensor is connected to the PLC controller, and the pressure at the output end of the output pipeline is monitored by the second pressure sensor.

[0043] Wherein, a first pressure sensor and a temperature sensor are arranged on the monitoring pipeline, and the first pressure sensor and the temperature sensor are connected to the PLC controller.

[0044] Among them, the pressure and temperature of the monitoring pipeline at the wellhead are monitored respectively by the first pressure sensor and the temperature sensor; the monitoring pipeline is arranged in parallel with the output pipeline, and an electric valve is also arranged on the monitoring pipeline, and the electric valve is connected to the PLC controller, and the opening and closing of the electric valve are controlled by the PLC controller.

[0045] The dosing system and the PLC controller are connected to the enterprise cloud as a whole through data interaction to achieve remote control of the dosing system.

[0046] Wherein, the PLC controller is connected to the injection pump and controls the running time of the injection pump according to the flow rate of the output pipeline.

[0047] The next figure of the one-way valve is the pressure sensor 1

[0048] From the diagram, the dosing system is as follows: the water comes out of the tank, is filtered by the filter, and then the injection pump provides power to flow through the safety valve, the one-way valve, the pressure sensor 1 and is injected into the wellhead

[0049] The PLC controller is connected to the heater, level gauge, electric valve, first pressure sensor, second pressure sensor, and temperature sensor to transmit signals.

[0050] The working principle of the present invention is: the casing pressure is controlled within a certain range by means of a casing control device, and under low casing pressure conditions, the electric valve is closed to achieve sealed quantitative addition of the agent.

[0051] Electric valve control:

[0052] If the measured value of pressure sensor 1 is higher than 2.5MPa, turn off the injection pump, open the electric valve and release the pressure.

[0053] Injection pump control:

[0054] Timing mode: control the injection time each time; control the running time each time;

[0055] Time control: daily timing control, control the operation of the pump at a fixed time point;

[0056] The software inputs the flow rate, and the PLC controller automatically converts the pump running time through the built-in algorithm;

[0057] Liquid level control: The upper and lower limits of the medicine box and the percentage of the internal medicine volume can be calculated and displayed in real time, and can cooperate with the pump linkage to provide a trigger point for the pump operation;

[0058] The running status of the pump can be displayed, and a comprehensive judgment can be made based on the medicine quantity and pressure sensor in the medicine box;

[0059] Realize remote transmission and control of cloud data of each device, and remote login to the cloud can check the dosing status of each device in real time.

[0060] The present invention integrates the dosing equipment and the casing pressure control equipment and can be linked together; the main linkage point is: when the casing pressure is too high, the control system will simultaneously issue instructions to open the pressure relief electric valve and stop the dosing pump from adding medicine.

[0061] The invention solves the problem that two independent systems are used for general oil well drug addition and casing pressure control, which have short service life, poor stability, poor linkage and need for frequent maintenance in complex environments.

[0062] In the present invention, the dosing system and the PLC controller are integrated as a whole, which can realize cloud control and cloud monitoring; the overall stable linkage is achieved through the PLC controller; there is no need for separate control, which ensures the linkage effect, while meeting the service life requirements in complex environments and improving the overall stability of use.

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An integrated linkage device for intelligent drug addition and casing pressure control in oil wells, characterized in that: The linkage device is arranged on the wellhead, and a monitoring pipeline is arranged on the wellhead, including a drug adding system and a PLC controller, and the monitoring pipeline is connected with the drug adding system through the PLC controller.

2. The integrated linkage device for intelligent drug addition and casing pressure control in oil wells according to claim 1, characterized in that: The dosing system includes a medicine storage box, a filter, an injection pump, a second pressure sensor, a safety valve and a one-way valve. The medicine storage box is filled with medicine liquid, and a liquid level gauge is provided in the medicine storage box. The liquid level gauge is connected to a PLC controller, and the liquid level of the medicine liquid in the medicine storage box is monitored by the PLC controller. The medicine storage box is provided with an output pipe, the other end of the output pipe is connected to the wellhead, and the output pipe is provided with a filter, an injection pump, a safety valve, a one-way valve and a second pressure sensor in sequence from the output end of the medicine storage box.

3. The integrated linkage device for intelligent drug addition and casing pressure control in oil wells according to claim 2, characterized in that: The heater is arranged in the medicine storage box, and the heater is connected to the PLC controller, and the medicine liquid in the medicine storage box is heated by the heater.

4. The integrated linkage device for intelligent drug addition and casing pressure control in oil wells according to claim 2, characterized in that: The second pressure sensor is connected to the PLC controller, and the pressure at the output end of the output pipeline is monitored by the second pressure sensor.

5. The integrated linkage device for intelligent drug addition and casing pressure control in oil wells according to claim 1, characterized in that: The monitoring pipeline is provided with a first pressure sensor and a temperature sensor, and the first pressure sensor and the temperature sensor are connected to a PLC controller.

6. The integrated linkage device for intelligent drug addition and casing pressure control in oil wells according to claim 1, characterized in that: The pressure and temperature of the monitoring pipeline at the wellhead are monitored respectively by the first pressure sensor and the temperature sensor; the monitoring pipeline is arranged in parallel with the output pipeline, and an electric valve is also arranged on the monitoring pipeline, and the electric valve is connected to the PLC controller, and the opening and closing of the electric valve are controlled by the PLC controller.

7. The integrated linkage device for intelligent drug addition and casing pressure control in oil wells according to claim 1 is characterized in that: The dosing system and the PLC controller are connected to the enterprise cloud as a whole through data interaction to achieve remote control of the dosing system.

8. The integrated linkage device for intelligent drug addition and casing pressure control in oil wells according to claim 1 is characterized in that: The PLC controller is connected to the injection pump and controls the running time of the injection pump according to the flow rate of the output pipeline.

Images