Precise automatic liquid preparation device and liquid preparation method thereof

Abstract

The invention belongs to the technical field of automatic liquid preparation, and discloses a precise automatic liquid preparation device and a liquid preparation method.The precise automatic liquid preparation device comprises a high-pressure water supply pipe, a first metering tank and a second metering tank, and a water supply adjusting valve, a first flowmeter and a first pressure transmitter are sequentially and fixedly installed in a pipeline of the high-pressure water supply pipe; the end of the high-pressure water supply pipe is fixedly connected with a tee joint, and the second metering tank is connected with the first metering tank through a pipeline. The water supply pipeline and the chemical supply pipeline are connected with the Christmas tree through the tee joint, in the water supply and chemical supply process, real-time control is achieved through the flow meter and the pressure transmitter, meanwhile, the chemical concentration and proportion are adjusted in real time through the metering pump during chemical supply, accurate control over water and chemicals can be achieved, and the chemical supply efficiency is improved. The water and the medicament according to the proportion are mixed through the static mixer, then the concentration analyzer is used for analyzing whether the concentration requirement is met or not, and then the mixture is fed into the Christmas tree, so that automatic and accurate liquid medicine mixing is achieved, and the liquid medicine proportioning and mixing efficiency is effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of automated liquid preparation technology, and relates to a precise automated liquid preparation device and liquid preparation method. Background Technology

[0002] The Kenli 6-1 oilfield reservoir is a shallow-water deltaic deposit with narrow channels and multiple superimposed layers, exhibiting a vertically "single" and horizontally "branched" distribution. Individual sand bodies are 5–14 m thick, with an average porosity of 28.9% and a permeability of 1121.9 mD, making it a high-porosity, high-permeability reservoir. The oilfield's fluid system is complex, employing an irregular injection-production well network of horizontal wells. The wells experience a single-direction effect, similar to the production characteristics of a similar oilfield (Bozhong 19-4). After water breakthrough, water cut increases rapidly, necessitating oil stabilization and water control measures such as hydraulic displacement.

[0003] The existing controlled injection process has a low level of intelligence, requiring manual operation for adding chemicals, observing liquid levels, manually opening and closing valves, starting and stopping the injection pump, and adjusting the pump speed. Therefore, it requires 4 to 5 operators to be on duty 24 hours a day. However, the unmanned platform does not have living quarters and does not meet the conditions for long-term duty.

[0004] The existing injection equipment for chemical control does not yet have automated solution preparation. During manual dosing, large errors in the mixing ratio are easily caused, affecting the accuracy of the solution concentration. This is not in line with the development trend of intelligent management in modern oilfields, and further research is needed to address this issue. Summary of the Invention

[0005] The purpose of this invention is to provide a precise and automated solution preparation device to solve the problem mentioned in the background art that the existing adjustment and injection equipment does not have automated solution preparation, and that manual operation of the dosing process is prone to large ratio errors, which affects the accuracy of the solution concentration.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A precision automated liquid preparation device includes a high-pressure water supply pipe, a first metering tank, and a second metering tank. A water supply regulating valve, a first flow meter, and a first pressure transmitter are sequentially fixedly installed in the high-pressure water supply pipe. A tee is fixedly connected to the end of the high-pressure water supply pipe. The second metering tank is connected to the first metering tank via a pipeline. The first metering tank is connected to the bottom of the tee via a conduit. A first drug supply control valve, a metering pump, a second pressure transmitter, and a second flow meter are sequentially fixedly installed in the pipeline connecting the first metering tank and the tee. The other end of the tee is connected to a wellhead. A static mixer and a concentration analyzer are fixedly installed in the pipeline between the tee and the wellhead.

[0007] In the aforementioned precise automated liquid dispensing device, level gauges are fixedly installed on the sides of both the first and second metering tanks, a first stirrer is fixedly installed on the top of the first metering tank, and a second stirrer is fixedly installed on the top of the second metering tank.

[0008] In the aforementioned precision automated liquid preparation device, a second drug supply control valve is fixedly installed in the pipeline between the first metering tank and the second metering tank, a drug dosing pipe is fixedly installed on the top of the second metering tank, and an electric drug dosing pump is fixedly installed at the end of the drug dosing pipe.

[0009] In the aforementioned precision automated liquid dispensing device, a control box is fixedly installed on one side of the second metering tank. The control box contains a control host. The water supply regulating valve, the first flow meter, the first pressure transmitter, the concentration analyzer, the second flow meter, the second pressure transmitter, the metering pump, the first drug supply control valve, the first stirrer, the second drug supply control valve, the second stirrer, and the electric dosing pump are all electrically connected to the control host via data cables. The control host is connected to the central platform via optical fiber.

[0010] In the aforementioned precision automated liquid dispensing device, the metering pump is a plunger-type metering pump with a maximum flow rate of 45 m³ / h, a flow rate adjustment ratio of 1000:1, and a maximum pressure range of 50 MPa.

[0011] In the aforementioned precision automated liquid dispensing device, both the first and second flow meters are ultrasonic flow meters, with a typical flow range of 0.3-6 m³ / h.

[0012] In the aforementioned precision automated liquid preparation device, the water supply regulating valve, the first drug supply control valve, and the second drug supply control valve are all electric ball valves.

[0013] Another object of the present invention is to provide a precise automated solution preparation method applied to the above-mentioned automated solution preparation device, comprising the following steps: Step S1: The equipment is started and the water supply regulating valve is opened. At this time, the water source flows into the interior of the high-pressure water supply pipe, and the water supply flow is detected by the first flow meter and the first pressure transmitter installed in the high-pressure water supply pipe. The water supply regulating valve is automatically interlocked with the first flow meter, and gradually reaches the opening degree of the water supply regulating valve when the set water supply volume is reached. Step S2: Open the first agitator fixed on the top of the first metering tank and the second agitator fixed on the top of the second metering tank. Stir the liquid medicine inside the first metering tank with the first agitator and stir the liquid medicine inside the second metering tank with the second agitator. Then open the second drug supply control valve and the first drug supply control valve. The liquid medicine inside the second metering tank first flows into the first metering tank. The liquid medicine inside the first metering tank flows into the three-way valve through the metering pump. During the flow of the liquid medicine, the concentration ratio of the drug medicine is adjusted by the second pressure transmitter and the second flow meter fixedly installed in the pipeline. Step S3: Water and chemical solution flow through the three-way valve into the static mixer for mixing. The mixed chemical solution is analyzed in real time by a concentration analyzer. Chemical solution that meets the standard flows into the wellhead. If the concentration does not meet the standard, the output value of the metering pump is adjusted to complete the precise and automated chemical solution preparation. Step S4: Equipment shutdown. A stop command is sent through the central control platform. After the stop command is processed by the host inside the control box, the first and second drug supply control valves are closed. Then the metering pump stops working, and the water supply regulating valve stops closing. The instantaneous flow rate drops to zero, and the first and second pressure transmitters maintain constant values, thus completing the equipment shutdown.

[0014] In the above-mentioned precise automated liquid preparation method, in step S2, when the first metering tank and the second metering tank are supplying medicine, the liquid level is monitored in real time by a level gauge. When the liquid level is lower than the threshold, the metering pump, the first medicine supply control valve and the second medicine supply control valve are closed.

[0015] In the above-mentioned precise automated liquid preparation method, in step S2, when the drug concentration ratio is detected, if it is lower than the set value, the frequency of the metering pump is adjusted to ensure that the drug concentration ratio meets the requirements.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: by connecting the water supply pipeline and the chemical supply pipeline to the wellhead via a tee, the flow meter and pressure transmitter control the water and chemical supply processes in real time. At the same time, the metering pump adjusts the concentration and ratio of the chemical agent in real time during chemical supply, which enables precise control of water and chemical agents. The water and chemical agents are mixed according to the ratio through a static mixer and then analyzed by a concentration analyzer to determine whether the concentration requirement is met before being sent to the wellhead. This achieves automated and precise mixing of chemical solutions, effectively improving the efficiency of chemical solution mixing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the precision automated liquid dispensing device of the present invention; Figure 2 This is a schematic diagram of the circuit connection structure of Embodiment 1 of the precision automated liquid dispensing device of the present invention; Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the precise automated liquid dispensing device of the present invention; Figure 4 This is a schematic diagram of the circuit connection structure of Embodiment 2 of the precision automated liquid dispensing device of the present invention; Figure 5 This is a flowchart of a precise automated solution preparation method according to the present invention.

[0018] In the diagram: 1. High-pressure water supply pipe; 2. Water supply regulating valve; 3. First flow meter; 4. First pressure transmitter; 5. Tee; 6. Static mixer; 7. Concentration analyzer; 8. Second flow meter; 9. Second pressure transmitter; 10. Metering pump; 11. Wellhead tree; 12. First chemical supply control valve; 13. First metering tank; 14. First agitator; 15. Second chemical supply control valve; 16. Second metering tank; 17. Second agitator; 18. Electric dosing pump; 19. Level gauge; 20. Control box; 21. Central platform. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1-2 This invention provides a technical solution for a precise automated liquid preparation device: according to Figure 1-2 As shown, the system includes a high-pressure water supply pipe 1, a first metering tank 13, and a second metering tank 16. A water supply regulating valve 2, a first flow meter 3, and a first pressure transmitter 4 are fixedly installed in sequence in the high-pressure water supply pipe 1. A tee 5 is fixedly connected to the end of the high-pressure water supply pipe 1. The second metering tank 16 is connected to the first metering tank 13 by a pipeline. The first metering tank 13 is connected to the bottom pipeline of the tee 5 through a conduit. A first drug supply control valve 12, a metering pump 10, a second pressure transmitter 9, and a second flow meter 8 are fixedly installed in sequence in the pipeline connecting the first metering tank 13 and the tee 5. The other end of the tee 5 is connected to a tree trunk 11. A static mixer 6 and a concentration analyzer 7 are fixedly installed in the pipeline between the tee 5 and the tree trunk 11.

[0021] Specifically, by connecting the water supply pipeline and the chemical supply pipeline to the wellhead 11 via a tee 5, the flow meter and pressure transmitter control the water and chemical supply processes in real time. Simultaneously, the metering pump 10 adjusts the concentration and ratio of the chemical in real time during chemical supply, enabling precise control of water and chemical. The water and chemical are mixed according to the ratio through a static mixer 6, and then analyzed by a concentration analyzer 7 to determine if the concentration meets the requirements before being sent to the wellhead 11. This achieves automated and precise mixing of the chemical solution, effectively improving the efficiency of chemical solution mixing.

[0022] according to Figure 1 and Figure 2 As shown, the present invention provides a precise automated liquid dispensing device. A level gauge 19 is fixedly installed on the side of both the first metering tank 13 and the second metering tank 16. A first stirrer 14 is fixedly installed on the top of the first metering tank 13, and a second stirrer 17 is fixedly installed on the top of the second metering tank 16.

[0023] Specifically, the installed level gauge 19 can monitor the dosage of medicine inside the first metering tank 13 and the second metering tank 16 in real time.

[0024] A second drug supply control valve 15 is fixedly installed in the pipeline between the first metering tank 13 and the second metering tank 16. A drug dosing pipe is fixedly installed on the top of the second metering tank 16, and an electric drug dosing pump 18 is fixedly installed at the end of the drug dosing pipe.

[0025] Specifically, through the cooperation of the dosing pipe and the electric dosing pump 18, the reagent inside the second metering tank 16 can be replenished in real time.

[0026] A control box 20 is fixedly installed on one side of the second metering tank 16. The control box 20 contains a control host. The water supply regulating valve 2, the first flow meter 3, the first pressure transmitter 4, the concentration analyzer 7, the second flow meter 8, the second pressure transmitter 9, the metering pump 10, the first drug supply control valve 12, the first stirrer 14, the second drug supply control valve 15, the second stirrer 17, and the electric dosing pump 18 are all electrically connected to the control host via data cables. The control host is connected to the central platform 21 via optical fiber.

[0027] Specifically, the control host controls various electrical appliances. The control host includes a PLC controller and a processor. The PLC controller is from the Siemens series, and the processor is from the Intel series.

[0028] The metering pump 10 is a plunger-type metering pump with a maximum flow rate of 45 m³ / h, a flow rate adjustment ratio of 1000:1, and a maximum pressure range of 50 MPa.

[0029] Specifically, the flow rate and pressure range of the metering pump 10 are controlled.

[0030] The first flow meter 3 and the second flow meter 8 are both ultrasonic flow meters with a range of 0.3-6 m³ / h.

[0031] Water supply regulating valve 2, first drug supply control valve 12, and second drug supply control valve 15 are all electric ball valves.

[0032] Example 2: Please refer to Figure 3-4 This invention provides a technical solution for a precise automated liquid preparation device: according to Figure 3-4 As shown, the system includes a high-pressure water supply pipe 1 and at least three sets of second metering tanks 16. A water supply regulating valve 2, a first flow meter 3, and a first pressure transmitter 4 are sequentially fixedly installed in the high-pressure water supply pipe 1. At least three tees 5 are fixedly connected to the surface of the high-pressure water supply pipe 1. At least three sets of second metering tanks 16 are connected to the bottom pipes of the corresponding tees 5 through conduits. A second drug supply control valve 15 and a metering pump 10 are sequentially fixedly installed in the pipes connecting the second metering tanks 16 and the corresponding tees 5. The other end of the tee 5 located on the far right is connected to a tree trunk 11. A static mixer 6 and a concentration analyzer 7 are fixedly installed in the pipes between the tees 5 and the tree trunk 11. A level gauge 19 is fixedly installed on the side of each of the at least three second metering tanks 16. A second stirrer 17 is fixedly installed on the top of each of the at least three second metering tanks 16.

[0033] At least three second metering tanks 16 are fixedly equipped with dosing pipes on their tops, and electric dosing pumps 18 are fixedly installed at the ends of the dosing pipes. A control box 20 is fixedly installed on one side of the second metering tank 16. A control host is fixedly installed inside the control box 20. The water supply regulating valve 2, the first flow meter 3, the first pressure transmitter 4, the concentration analyzer 7, the metering pump 10, the second dosing control valve 15, the second stirrer 17, and the electric dosing pump 18 are all electrically connected to the control host via data cables. The control host is signal connected to the central platform 21 via optical fiber.

[0034] Specifically, by coordinating multiple metering tanks and connecting them to the water supply pipeline via multiple T-junctions, the system can automatically mix multiple chemicals according to a certain mixing ratio during use, achieving simultaneous addition and mixing of multiple chemicals.

[0035] The metering pump 10 is a plunger-type metering pump with a maximum flow rate of 45 m³ / h, a flow rate adjustment ratio of 1000:1, and a maximum pressure range of 50 MPa.

[0036] Specifically, the flow rate and pressure range of the metering pump 10 are controlled.

[0037] The first flow meter 3 and the second flow meter 8 are both ultrasonic flow meters with a range of 0.3-6 m³ / h.

[0038] Water supply regulating valve 2, first drug supply control valve 12, and second drug supply control valve 15 are all electric ball valves.

[0039] Example 3: Please refer to Figure 5 The present invention provides a precise and automated solution preparation method, comprising the following steps: Step S1: The equipment is started and the water supply regulating valve 2 is opened. At this time, the water source flows into the interior of the high-pressure water supply pipe 1, and the water supply flow is detected by the first flow meter 3 and the first pressure transmitter 4 installed in the high-pressure water supply pipe 1. The water supply regulating valve 2 and the first flow meter 3 are automatically interlocked, and the opening degree of the water supply regulating valve 2 when the set water supply volume is gradually reached. Step S2: Open the first stirrer 14 fixed on the top of the first metering tank 13 and the second stirrer 17 fixed on the top of the second metering tank 16. Stir the liquid medicine inside the first metering tank 13 by the first stirrer 14 and stir the liquid medicine inside the second metering tank 16 by the second stirrer 17. Then open the second drug supply control valve 15 and the first drug supply control valve 12. The liquid medicine inside the second metering tank 16 first flows into the first metering tank 13. The liquid medicine inside the first metering tank 13 flows into the three-way valve 5 through the metering pump 10 in sequence. During the flow of the liquid medicine, the drug concentration ratio is adjusted by the second pressure transmitter 9 and the second flow meter 8 fixedly installed in the pipeline. Step S3: Water and chemical solution flow through the three-way valve 5 into the static mixer 6 for mixing. The mixed chemical solution is analyzed in real time by the concentration analyzer 7. Chemical solution that meets the standard flows into the wellhead 11. If the concentration does not meet the standard, the output value of the metering pump is adjusted to achieve the precise and automated dispensing of chemical solution. Step S4: Equipment shutdown. A stop command is sent through the central control platform. After the stop command is processed by the host inside the control box 20, the first drug supply control valve 12 and the second drug supply control valve 15 are closed. Then the metering pump 10 stops working, and the water supply regulating valve 2 stops closing. The instantaneous flow rate drops to zero, and the first pressure transmitter 4 and the second pressure transmitter 9 maintain constant values, thus completing the equipment shutdown.

[0040] In step S2, when the first metering tank 13 and the second metering tank 16 are supplying medicine, the liquid level is monitored in real time by the level gauge 19. When the liquid level is lower than the threshold, the metering pump 10, the first medicine supply control valve 12 and the second medicine supply control valve 15 are closed.

[0041] In step S2, when the drug concentration ratio is detected, if it is lower than the set value, the frequency of the metering pump 10 is adjusted to ensure that the drug concentration ratio meets the requirements.

[0042] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A precision automated liquid dispensing device, comprising a high-pressure water supply pipe (1), a first metering tank (13), and a second metering tank (16), characterized in that, The high-pressure water supply pipe (1) is equipped with a water supply regulating valve (2), a first flow meter (3) and a first pressure transmitter (4) in sequence, and a tee (5) is fixedly connected to the end of the high-pressure water supply pipe (1). The second metering tank (16) is connected to the first metering tank (13) by pipeline; The first metering tank (13) is connected to the bottom end of the tee (5) via a conduit, and the first drug supply control valve (12), metering pump (10), second pressure transmitter (9) and second flow meter (8) are sequentially fixedly installed in the connecting pipe between the first metering tank (13) and the tee (5). The other end of the tee (5) is connected to the tree (11), and a static mixer (6) and a concentration analyzer (7) are fixedly installed in the pipeline between the tee (5) and the tree (11).

2. The precise automated liquid preparation device according to claim 1, characterized in that: A level gauge (19) is fixedly installed on the side of both the first metering tank (13) and the second metering tank (16). A first stirrer (14) is fixedly installed on the top of the first metering tank (13), and a second stirrer (17) is fixedly installed on the top of the second metering tank (16).

3. The precise automated liquid preparation device according to claim 2, characterized in that: A second drug supply control valve (15) is fixedly installed in the pipeline between the first metering tank (13) and the second metering tank (16). A drug dosing pipe is fixedly installed on the top of the second metering tank (16), and an electric drug dosing pump (18) is fixedly installed at the end of the drug dosing pipe.

4. The precise automated liquid preparation device according to claim 3, characterized in that: A control box (20) is fixedly installed on one side of the second metering tank (16). The control box (20) is fixedly installed with a control host. The water supply regulating valve (2), the first flow meter (3), the first pressure transmitter (4), the concentration analyzer (7), the second flow meter (8), the second pressure transmitter (9), the metering pump (10), the first drug supply control valve (12), the first stirrer (14), the second drug supply control valve (15), the second stirrer (17), and the electric dosing pump (18) are all electrically connected to the control host through data lines. The control host is connected to the central platform (21) through optical fiber.

5. The precise automated liquid preparation device according to claim 1, characterized in that: The metering pump (10) is a plunger-type metering pump (10), and the maximum flow rate of the metering pump (10) is 45 m³ / s. 3 / h, flow rate adjustment ratio is 1000:1, and maximum pressure range is 50MPa.

6. The precise automated liquid preparation device according to claim 1, characterized in that: The first flow meter (3) and the second flow meter (8) are both ultrasonic flow meters with a range of 0.3-6 m³ / h.

7. The precise automated liquid preparation device according to claim 3, characterized in that: The water supply regulating valve (2), the first drug supply control valve (12), and the second drug supply control valve (15) are all electric ball valves.

8. A precise and automated solution preparation method, characterized in that: The device, applied to any one of claims 1-7, comprises the following steps: Step S1: The equipment is started and the water supply regulating valve (2) is opened. At this time, the water source flows into the interior of the high-pressure water supply pipe (1) and the water supply flow is detected by the first flow meter (3) and the first pressure transmitter (4) installed in the high-pressure water supply pipe (1). The water supply regulating valve (2) and the first flow meter (3) are automatically interlocked and gradually reach the opening degree of the water supply regulating valve (2) when the set water supply volume is reached. Step S2: Open the first stirrer (14) fixed on the top of the first metering tank (13) and the second stirrer (17) fixed on the top of the second metering tank (16). Stir the liquid medicine inside the first metering tank (13) through the first stirrer (14) and stir the liquid medicine inside the second metering tank (16) through the second stirrer (17). Then open the second drug supply control valve (15) and the first drug supply control valve (12). The liquid medicine inside the second metering tank (16) first flows into the first metering tank (13). The liquid medicine inside the first metering tank (13) flows into the three-way valve (5) through the metering pump (10) in sequence. During the flow of the liquid medicine, the concentration ratio of the drug medicine is adjusted by the second pressure transmitter (9) and the second flow meter (8) fixedly installed in the pipeline. Step S3: Water and medicine flow through the three-way valve (5) into the static mixer (6) for mixing. The mixed medicine is analyzed in real time by the concentration analyzer (7). Medicine that meets the standard flows into the tree (11). If the concentration does not meet the standard, the output value of the metering pump is adjusted to complete the precise and automated preparation of the medicine. Step S4: Equipment shutdown. A stop command is sent through the central control platform. After the stop command is processed by the host inside the control box (20), the first drug supply control valve (12) and the second drug supply control valve (15) are closed. Then the metering pump (10) stops working, and then the water supply regulating valve (2) stops closing. The instantaneous flow rate drops to zero, and the first pressure transmitter (4) and the second pressure transmitter (9) are constant, thus completing the equipment shutdown.

9. The precise automated solution preparation method according to claim 8, characterized in that: In step S2, when the first metering tank (13) and the second metering tank (16) are supplying medicine, the liquid level is monitored in real time by the level gauge (19). When the liquid level is lower than the threshold, the metering pump (10), the first medicine supply control valve (12) and the second medicine supply control valve (15) are closed.

10. The precise automated solution preparation method according to claim 8, characterized in that: In step S2, when the drug concentration ratio is detected, if it is lower than the set value, the frequency of the metering pump (10) is adjusted to ensure that the drug concentration ratio meets the requirements.

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