A device for detecting the corrosiveness of oil well effluent

Abstract

The application provides a kind of oil well produced liquid corrosive detection device, comprising: liquid receiving device, liquid inlet pipe, drive pump, ion concentration acquisition device and controller;Liquid receiving device has annular closed loop channel inside, liquid inlet hole allowing external liquid to enter closed loop channel is arranged on the side wall of closed loop channel, one end of liquid inlet pipe is connected on liquid inlet hole, the other end is connected with external oil well produced liquid source, first valve is arranged on liquid inlet pipe, drive pump is arranged in closed loop channel;Controller is electrically connected with drive pump to control the work of drive pump, the controller has a display, ion concentration acquisition device is arranged in closed loop channel and is electrically connected with the display.It can accurately simulate the state of produced liquid in actual work, so that the accuracy of detection result is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of petroleum extraction technology, and in particular to a device for detecting the corrosivity of produced fluids from oil wells. Background Technology

[0002] During oil extraction, corrosion of pipelines by produced fluids is unavoidable. Therefore, detecting the corrosivity of produced fluids is crucial for assessing pipeline corrosion levels. Currently, the method for detecting the corrosivity of produced fluids involves placing a sample in a container and analyzing its ion content to determine its corrosivity. However, this method cannot accurately simulate the actual working conditions of the produced fluid, resulting in inaccurate test results. Summary of the Invention

[0003] The purpose of this invention is to provide a coal gasification device that can accurately simulate the state of the produced fluid in actual operation, thereby ensuring the accuracy of the test results.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] An oil well produced fluid corrosivity detection device includes: a fluid receiving device, a fluid inlet pipe, a drive pump, an ion concentration acquisition device, and a controller;

[0006] The liquid receiving device has an annular closed-loop channel inside. An inlet hole is provided on the side wall of the closed-loop channel to allow external liquid to enter the closed-loop channel. One end of the inlet pipe is connected to the inlet hole, and the other end is connected to an external oil well produced fluid source so that the external produced fluid can enter the closed-loop channel through the inlet hole. A first valve is provided on the inlet pipe. The drive pump is located inside the closed-loop channel to drive the produced fluid in the closed-loop channel to move along the extension direction of the closed-loop channel.

[0007] The controller is electrically connected to the drive pump to control the operation of the drive pump. The controller has a display. The ion concentration acquisition device is set inside the closed-loop channel and electrically connected to the display to acquire the ion concentration information of the collected liquid in the closed-loop channel in real time and send the information to the display for display.

[0008] Preferably, the controller also includes a clock;

[0009] The clock is electrically connected to the ion collection device and is used to keep track of the operation of the ion collection device.

[0010] Preferably, it also includes a flow rate acquisition device;

[0011] The flow rate acquisition device is installed inside the closed-loop channel and electrically connected to the controller. The flow rate acquisition device acquires the flow rate information of the extracted fluid in the closed-loop channel in real time and sends the information to the controller. The controller controls the drive pump to work based on the received flow rate information of the extracted fluid in the closed-loop channel.

[0012] Preferably, it also includes a heating device;

[0013] The heating device is provided in correspondence with the liquid receiving device to heat the produced liquid in the liquid receiving device.

[0014] Preferably, the heating device includes a heating element and a housing filled with water.

[0015] The heating element is disposed within the housing and immersed in water located within the housing to heat the water. The liquid receiving device is disposed within the housing and is at least partially immersed in water located within the housing, so that the water heated by the heating element can transfer heat to the produced fluid located in the closed-loop channel through the outer wall of the liquid receiving device.

[0016] Preferably, it also includes a temperature acquisition device;

[0017] The temperature acquisition device is installed in the closed-loop channel and electrically connected to the controller. The controller is electrically connected to the heating element. The temperature acquisition device collects the temperature information of the extracted fluid in the closed-loop channel in real time and sends the information to the controller. The controller controls the heating element to work according to the received temperature information of the extracted fluid in the closed-loop channel.

[0018] Preferably, it also includes a pressure relief pipe;

[0019] A pressure relief hole is provided on the side wall of the closed-loop channel to allow the produced fluid in the closed-loop channel to be discharged outside the closed-loop channel. One end of the pressure relief pipe is connected to the pressure relief hole, and the other end can be connected to an external target location so that the produced fluid in the closed-loop channel can be discharged to the external target location through the pressure relief pipe. A second valve is provided on the pressure relief pipe.

[0020] Preferably, it also includes a pressure acquisition device;

[0021] The pressure acquisition device is installed within the closed-loop channel and electrically connected to the controller. The controller is electrically connected to the first valve and the second valve respectively. The pressure acquisition device acquires the pressure information of the extracted fluid in the closed-loop channel in real time and sends the information to the controller. The controller controls the operation of the first valve and the second valve according to the received pressure information of the extracted fluid in the closed-loop channel.

[0022] Preferably, it also includes an acid inlet pipe;

[0023] An acid inlet hole is provided on the side wall of the closed-loop channel to allow external acid to enter the closed-loop channel. One end of the acid inlet pipe is connected to the acid inlet hole, and the other end is connected to an external acid source so that external acid can enter the closed-loop channel through the acid inlet pipe. A third valve is provided on the acid inlet pipe.

[0024] And / or, also includes the entry of alkaline solution into the tube;

[0025] An alkali inlet hole is provided on the side wall of the closed-loop channel to allow external alkali solution to enter the closed-loop channel. One end of the alkali inlet pipe is connected to the alkali inlet hole, and the other end is connected to an external alkali source so that external alkali solution can enter the closed-loop channel through the alkali inlet pipe. A fourth valve is provided on the alkali inlet pipe.

[0026] Preferably, it also includes a pH value acquisition device;

[0027] The pH value acquisition device is located within the closed-loop channel and is electrically connected to the controller. The controller is electrically connected to the third valve and / or the fourth valve. The pH value acquisition device acquires the pH value information of the extracted fluid in the closed-loop channel in real time and sends the information to the controller. The controller controls the operation of the third valve and / or the fourth valve based on the received pH value information of the extracted fluid in the closed-loop channel.

[0028] The oil well produced fluid corrosivity detection device of the present invention employs a closed-loop channel with an annular structure inside the fluid receiving device. An inlet hole is provided on the side wall of the closed-loop channel to allow external liquid to enter. One end of an inlet pipe is connected to the inlet hole, and the other end is connected to an external oil well produced fluid source, allowing external produced fluid to enter the closed-loop channel through the inlet hole. A first valve is provided on the inlet pipe, and a drive pump is located within the closed-loop channel to drive the produced fluid within the closed-loop channel to move along the extension direction of the closed-loop channel. This technical solution enables accurate simulation of the produced fluid's state during actual operation, ensuring the accuracy of the detection results. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of an embodiment of the oil well produced fluid corrosivity detection device of the present invention;

[0030] Figure 2 for Figure 1 The circuit diagram.

[0031] In the diagram: 1-Liquid receiving device; 2-Liquid inlet pipe; 3-Drive pump; 4-Ion concentration acquisition device; 5-Controller; 6-Closed-loop channel; 7-Liquid inlet hole; 8-First valve; 9-Display; 10-Clock; 11-Flow rate acquisition device; 12-Heating device; 13-Heating element; 14-Housing; 15-Temperature acquisition device; 16-Pressure relief pipe; 17-Pressure relief hole; 18-Second valve; 19-Pressure acquisition device; 20-Acid inlet pipe; 21-Acid inlet control; 22-Third valve; 23-Alkali inlet pipe; 24-Alkali inlet hole; 25-Fourth valve; 26-pH value acquisition device. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the oil well produced fluid corrosivity detection device of this invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0033] Example 1

[0034] like Figure 1 , 2 As shown, an oil well produced fluid corrosivity detection device includes: a fluid receiving device 1, a fluid inlet pipe 2, a drive pump 3, an ion concentration acquisition device 4, and a controller 5. The fluid receiving device 1 has an annular closed-loop channel 6 inside. An inlet hole 7 is provided on the side wall of the closed-loop channel 6 to allow external liquid to enter the closed-loop channel 6. One end of the fluid inlet pipe 2 is connected to the inlet hole 7, and the other end is connected to an external oil well produced fluid source, so that the external produced fluid can enter the closed-loop channel 6 through the inlet hole 7. A first valve 8 is provided on the fluid inlet pipe 2. The drive pump 3 is located inside the closed-loop channel 6 to drive the produced fluid in the closed-loop channel 6 to move along the extension direction of the closed-loop channel 6. The controller 5 is electrically connected to the drive pump 3 to control the operation of the drive pump 3. The controller 5 has a display 9. The ion concentration acquisition device 4 is located inside the closed-loop channel 6 and electrically connected to the display 9 to collect the ion concentration information of the produced fluid in the closed-loop channel 6 in real time and send this information to the display 9 for display. In practical use, the collected fluid from the external source can be prepared to a certain concentration and then transported into the closed-loop channel 6 through the inlet pipe 2. After the input is completed, the first valve 8 is closed. Next, the drive pump 3 is turned on through the controller 5, so that the drive pump 3 drives the collected fluid to flow in the closed-loop channel 6 at a certain speed. This allows the collected fluid to simulate the movement state under actual working conditions. At this time, the ion concentration acquisition device 4 collects the ion concentration information of the collected fluid (e.g., Fe). 3+ The concentration of the extracted fluid is sent to the display 9 for display, so that the operator can determine the corrosiveness of the extracted fluid based on the sample concentration information.

[0035] Example 2

[0036] Based on Example 1, such as Figure 2 As shown, the controller 5 also includes a clock 10, which is electrically connected to the ion collection device to time the operation of the ion collection device. This allows for accurate detection of changes in the ion concentration of the collected liquid over a certain period of time. Furthermore, as... Figure 1 , 2 As shown, it also includes a flow rate acquisition device 11, which is installed within the closed-loop channel 6 and electrically connected to the controller 5. The flow rate acquisition device 11 acquires the flow rate information of the produced fluid in the closed-loop channel 6 in real time and sends this information to the controller 5. The controller 5 controls the operation of the drive pump 3 based on the received flow rate information of the produced fluid in the closed-loop channel 6. In this way, the flow rate of the produced fluid in the closed-loop channel 6 can be precisely controlled, thereby making it consistent with the actual flow rate during on-site operation.

[0037] Example 3

[0038] Based on Embodiment 2, such as Figure 1 As shown, it also includes a heating device 12, which is correspondingly arranged with the liquid receiving device 1 to heat the produced liquid in the liquid receiving device 1. This allows for adjustment of the temperature of the produced liquid in the annular channel 6, making it closer to the actual working temperature.

[0039] Specifically, such as Figure 1 , 2 As shown, the heating device 12 includes a heating element 13 and a housing 14 filled with water. The heating element 13 is disposed within the housing 14 and immersed in the water within the housing 14 to heat the water. The liquid receiving device 1 is disposed within the housing 14 and is at least partially immersed in the water within the housing 14, so that the water heated by the heating element 13 can transfer heat to the produced fluid located in the closed-loop channel 6 through the outer wall of the liquid receiving device 1. This method ensures the uniformity of temperature adjustment of the produced fluid in the loop channel 6 and also avoids the phenomenon of excessively high temperature of the produced fluid in the loop channel 6.

[0040] Furthermore, such as Figure 1 , 2As shown, it also includes a temperature acquisition device 15, which is installed inside the closed-loop channel 6 and electrically connected to the controller 5. The controller 5 is electrically connected to the heating element 13. The temperature acquisition device 15 collects the temperature information of the produced fluid in the closed-loop channel 6 in real time and sends this information to the controller 5. The controller 5 controls the heating element 13 to work based on the received temperature information of the produced fluid in the closed-loop channel 6. This allows for precise control of the temperature of the produced fluid in the closed-loop channel 6, thus ensuring that it matches the actual operating temperature on site.

[0041] The inventors obtained the following data when testing the corrosivity of the extracted fluid:

[0042] (1) A 90% concentration of produced fluid was introduced into closed-loop channel 6 at room temperature. After 24 hours, Fe was measured. 3+ The concentration is 79 mol / L.

[0043] (2) The temperature of the produced fluid with a concentration of 90% was kept constant at 50℃ by introducing it into the closed-loop channel 6. After 24 hours, the Fe content was measured. 3+ The concentration was 214 mol / L. Compared with (1), it was concluded that the corrosion rate increased significantly with increasing temperature.

[0044] (3) By introducing a 90% concentration of produced fluid into closed-loop channel 6, maintaining its temperature at 50℃ and a flow rate of 1 m / s, Fe was measured after 24 hours. 3+ The concentration was 529 mol / L. Comparing with (1) and (2), it can be concluded that as the flow rate of the produced fluid increases, Fe... 3+ The faster the diffusion rate, the more corrosive it becomes.

[0045] The inventors also tested the extract at concentrations of 70% and 50%, and the results were exactly the same.

[0046] Example 4

[0047] Based on any of the above embodiments, such as Figure 1 As shown, it also includes a pressure relief pipe 16. A pressure relief hole 17 is provided on the side wall of the closed-loop channel 6 to allow the produced fluid within the closed-loop channel 6 to drain outside the closed-loop channel 6. One end of the pressure relief pipe 16 is connected to the pressure relief hole 17, and the other end can be connected to an external target location, so that the produced fluid within the closed-loop channel 6 can be discharged to the external target location through the pressure relief pipe 16. A second valve 18 is provided on the pressure relief pipe 16. This method can prevent the produced fluid from becoming too pressurized within the closed-loop channel 6.

[0048] Furthermore, such as Figure 1 , 2As shown, the system also includes a pressure acquisition device 19, which is installed within the closed-loop channel 6 and electrically connected to the controller 5. The controller 5 is electrically connected to the first valve 8 and the second valve 18. The pressure acquisition device 19 collects the pressure information of the produced fluid in the closed-loop channel 6 in real time and sends this information to the controller 5. The controller 5 controls the operation of the first valve 8 and the second valve 18 based on the received pressure information. In actual use, when the pressure of the produced fluid in the closed-loop channel 6 is too high, the controller 5 controls the second valve 18 to open, allowing the produced fluid to be discharged from the pressure relief pipe 16 to reduce the pressure. When the pressure of the produced fluid in the closed-loop channel 6 is too low, the controller 5 controls the first valve 8 to open, allowing the produced fluid to enter from the inlet pipe 2 to increase the pressure. This achieves precise adjustment of the pressure of the produced fluid in the closed-loop channel 6, ensuring that its pressure matches the actual pressure on site.

[0049] Example 5

[0050] Based on any of the above embodiments, such as Figure 1 As shown, it also includes an acid inlet pipe 20, with an acid inlet hole 21 on the side wall of the closed-loop channel 6 to allow external acid to enter the closed-loop channel 6. One end of the acid inlet pipe 20 is connected to the acid inlet hole 21, and the other end is connected to an external acid source, so that external acid can enter the closed-loop channel 6 through the acid inlet pipe 20. A third valve 22 is provided on the acid inlet pipe 20. And / or, it also includes an alkali inlet pipe 23, with an alkali inlet hole 24 on the side wall of the closed-loop channel 6 to allow external alkali to enter the closed-loop channel 6. One end of the alkali inlet pipe 23 is connected to the alkali inlet hole 24, and the other end is connected to an external alkali source, so that external alkali can enter the closed-loop channel 6 through the alkali inlet pipe 23. A fourth valve 25 is provided on the alkali inlet pipe 23. This technical solution allows for the introduction of citric acid or dilute hydrochloric acid into the closed-loop channel 6 via acid inlet pipe 20 to lower the pH value of the produced fluid, or the introduction of sodium carbonate solution into the closed-loop channel 6 via alkaline inlet pipe 23 to raise the pH value of the produced fluid, thereby achieving the purpose of adjusting the pH value of the produced fluid.

[0051] Furthermore, such as Figure 1 , 2 As shown, it also includes a pH value acquisition device 26;

[0052] A pH acquisition device 26 is installed within the closed-loop channel 6 and electrically connected to the controller 5. The controller 5 is electrically connected to the third valve 22 and / or the fourth valve 25. The pH acquisition device 26 collects the pH information of the produced fluid in the closed-loop channel 6 in real time and sends this information to the controller 5. The controller 5 controls the operation of the third valve 22 and / or the fourth valve 25 based on the received pH information of the produced fluid in the closed-loop channel 6. When the pH of the produced fluid is too low, the controller controls the low-pressure valve 25 to open. At this time, alkaline solution enters the closed-loop channel 6 through the alkaline solution inlet pipe 23, and the pH of the produced fluid is increased. When the pH of the produced fluid is too high, the controller controls the low-pressure valve 22 to open. At this time, acidic solution enters the closed-loop channel 6 through the acidic solution inlet pipe 20, and the pH of the produced fluid is decreased. In this way, the pH of the produced fluid in the closed-loop channel 6 is precisely adjusted to match the actual pH value on site.

[0053] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A device for detecting the corrosivity of produced fluid from oil wells, characterized in that: include: Liquid receiving device (1), liquid inlet pipe (2), drive pump (3), ion concentration collection device (4) and controller (5); The liquid receiving device (1) has an annular closed-loop channel (6) inside. An inlet hole (7) is provided on the side wall of the closed-loop channel (6) to allow external liquid to enter the closed-loop channel (6). One end of the inlet pipe (2) is connected to the inlet hole (7), and the other end is connected to the external oil well produced liquid source so that the external produced liquid can enter the closed-loop channel (6) through the inlet hole (7). A first valve (8) is provided on the inlet pipe (2). The drive pump (3) is located inside the closed-loop channel (6) to drive the produced liquid in the closed-loop channel (6) to move along the extension direction of the closed-loop channel (6). The controller (5) is electrically connected to the drive pump (3) to control the operation of the drive pump (3). The controller (5) has a display (9). The ion concentration acquisition device (4) is set inside the closed-loop channel (6) and electrically connected to the display (9) to collect the ion concentration information of the collected liquid in the closed-loop channel (6) in real time and send the information to the display (9) for display.

2. The oil well produced fluid corrosivity detection device according to claim 1, characterized in that: The controller (5) also includes a clock (10); The clock (10) is electrically connected to the ion collection device and is used to time the operation of the ion collection device.

3. The oil well produced fluid corrosivity detection device according to claim 2, characterized in that: It also includes a flow rate acquisition device (11); The flow rate acquisition device (11) is located inside the closed-loop channel (6) and is electrically connected to the controller (5). The flow rate acquisition device (11) acquires the flow rate information of the extracted fluid in the closed-loop channel (6) in real time and sends the information to the controller (5). The controller (5) controls the drive pump (3) to work according to the received flow rate information of the extracted fluid in the closed-loop channel (6).

4. The oil well produced fluid corrosivity detection device according to any one of claims 1 to 3, characterized in that: It also includes a heating device (12); The heating device (12) is provided in correspondence with the liquid receiving device (1) to heat the extracted liquid in the liquid receiving device (1).

5. The oil well produced fluid corrosivity detection device according to claim 4, characterized in that: The heating device (12) includes a heating element (13) and a housing (14) filled with water. The heating element (13) is disposed inside the housing (14) and immersed in water located inside the housing (14) to heat the water. The liquid receiving device (1) is disposed inside the housing (14) and is at least partially immersed in water located inside the housing (14) so ​​that the water heated by the heating element (13) can transfer heat to the extracted fluid located in the closed-loop channel (6) through the outer wall of the liquid receiving device (1).

6. The oil well produced fluid corrosivity detection device according to claim 5, characterized in that: It also includes a temperature acquisition device (15); The temperature acquisition device (15) is installed in the closed-loop channel (6) and electrically connected to the controller (5). The controller (5) is electrically connected to the heating element (13). The temperature acquisition device (15) collects the temperature information of the extracted liquid in the closed-loop channel (6) in real time and sends the information to the controller (5). The controller (5) controls the heating element (13) to work according to the received temperature information of the extracted liquid in the closed-loop channel (6).

7. The oil well produced fluid corrosivity detection device according to any one of claims 1 to 3, characterized in that: It also includes a pressure relief pipe (16); A pressure relief hole (17) is provided on the side wall of the closed-loop channel (6) to allow the produced fluid in the closed-loop channel (6) to be discharged outside the closed-loop channel (6). One end of the pressure relief pipe (16) is connected to the pressure relief hole (17), and the other end can be connected to an external target location so that the produced fluid in the closed-loop channel (6) can be discharged to the external target location through the pressure relief pipe (16). A second valve (18) is provided on the pressure relief pipe (16).

8. The oil well produced fluid corrosivity detection device according to claim 7, characterized in that: It also includes a pressure acquisition device (19); The pressure acquisition device (19) is located inside the closed-loop channel (6) and is electrically connected to the controller (5). The controller (5) is electrically connected to the first valve (8) and the second valve (18) respectively. The pressure acquisition device (19) acquires the pressure information of the extracted fluid in the closed-loop channel (6) in real time and sends the information to the controller (5). The controller (5) controls the first valve (8) and the second valve (18) to work according to the received pressure information of the extracted fluid in the closed-loop channel (6).

9. The oil well produced fluid corrosivity detection device according to any one of claims 1 to 3, characterized in that: It also includes the acid inlet pipe (20); An acid inlet hole (21) is provided on the side wall of the closed-loop channel (6) to allow external acid to enter the closed-loop channel (6). One end of the acid inlet pipe (20) is connected to the acid inlet hole (21), and the other end is connected to an external acid source so that external acid can enter the closed-loop channel (6) through the acid inlet pipe (20). A third valve (22) is provided on the acid inlet pipe (20). And / or, also includes the alkaline solution inlet tube (23); An alkali inlet hole (24) is provided on the side wall of the closed-loop channel (6) to allow external alkali to enter the closed-loop channel (6). One end of the alkali inlet pipe (23) is connected to the alkali inlet hole (24), and the other end is connected to an external alkali source so that external alkali can enter the closed-loop channel (6) through the alkali inlet pipe (23). A fourth valve (25) is provided on the alkali inlet pipe (23).

10. The oil well produced fluid corrosivity detection device according to claim 9, characterized in that: It also includes a pH value acquisition device (26); The pH value acquisition device (26) is located inside the closed-loop channel (6) and is electrically connected to the controller (5). The controller (5) is electrically connected to the third valve (22) and / or the fourth valve (25). The pH value acquisition device (26) acquires the pH value information of the extracted fluid in the closed-loop channel (6) in real time and sends the information to the controller (5). The controller (5) controls the operation of the third valve (22) and / or the fourth valve (25) based on the received pH value information of the extracted fluid in the closed-loop channel (6).

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