Water quality multi-parameter remote online monitoring device for oil and gas field reinjection water

Abstract

The utility model discloses a water quality multi-parameter remote on-line monitoring device for oil and gas field reinjection water, which relates to the technical field of water quality on-line monitoring and comprises a collecting tank, the top of the collecting tank is provided with a high liquid level probe, and the bottom of the collecting tank is provided with a low liquid level probe and a liquid outlet; an exhaust valve and a plurality of test probes are further mounted at the top of the collection tank, and a liquid inlet and a plurality of high-pressure nozzles are further arranged at the bottom of the collection tank; the device further comprises an alcohol water tank, the high-pressure nozzle is connected with a cleaning pipe, the cleaning pipe is communicated with an external pipeline and the alcohol water tank, and a cleaning valve and a high-pressure flushing pump are arranged on the cleaning pipe. The device is internally provided with a plurality of test probes for multi-parameter remote on-line monitoring, and the plurality of test probes are in direct contact with oil and gas field reinjection water, so that the measurement accuracy is improved; according to the device, through the combined action of the high-pressure nozzle and the cleaning assembly, all-directional cleaning of the test probe is realized, and the accuracy of water quality detection is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality online monitoring, in particular to a multi-parameter remote online monitoring device for water quality of oil and gas field reinjection water. Background Art

[0002] At present, all oil production plants have produced water treatment stations, but the treatment effect of most produced water treatment stations is unsatisfactory. This may cause serious corrosion of production equipment, water injection work cannot run normally, and even damage the oil layer, block the bottom seepage channels, reduce water absorption capacity, affect the effect of water injection development, and make the treatment of damaged oil layers more difficult, increase the cost of operating measures, increase the development cost of oil fields, and bring serious negative impacts on the production and operation of oil fields. Therefore, it is particularly important to detect the water quality of reinjection water.

[0003] At present, there are many water quality monitoring devices invented, but there are not many multi-parameter online monitoring devices for water quality of oil and gas field reinjection water. Chinese patent CN114887942A provides a probe cleaning system and method for a reinjection water quality monitoring device. The adjustable water nozzle, water quality monitoring module and self-cleaning module of the device are all arranged on the oil pipe, and the water quality of the water transported outside the produced water treatment station cannot be monitored. Chinese patent CN103792188A invented a water quality monitoring device for oil field reinjection water, which monitors the turbidity through an infrared light scattering monitoring device. There is no contact between the detection equipment and the water quality, avoiding pollution of the detection equipment. However, it is precisely because the water quality has no contact with the detection equipment that the detection parameters are limited, the pH value, an important evaluation parameter of water quality, cannot be obtained, and other detection functions cannot be added later. Therefore, in order to achieve accurate measurement, the detection equipment needs to be in contact with the water quality, and there must be pollutants such as oil and suspended matter in the reinjection water. If monitoring is carried out in the reinjection water of the oil and gas field for a long time, it will cause pollution to the monitoring probe, causing the monitoring data to deviate from the actual results, and reducing the accuracy of water quality detection. Utility Model Content

[0004] The utility model provides a multi-parameter remote online monitoring device for water quality of oil and gas field reinjection water in order to realize online monitoring of water quality of oil and gas field reinjection water and clean the monitoring probe to improve the accuracy of water quality detection.

[0005] The technical scheme of the utility model is: a multi-parameter remote online monitoring device for water quality of oil and gas field reinjection water, comprising a collection tank, a high liquid level probe is arranged on the top of the collection tank, and a low liquid level probe and a liquid discharge port are arranged on the bottom; an exhaust valve and a plurality of test probes are also installed on the top of the collection tank, and a liquid inlet and a plurality of high-pressure nozzles are also arranged on the bottom;

[0006] It also includes an alcohol water tank. The high-pressure nozzle is connected to a cleaning pipe, which is communicated with an external pipeline and the alcohol water tank. A cleaning valve and a high-pressure flushing pump are provided on the cleaning pipe.

[0007] Preferably, the liquid inlet is connected to an inlet pipe, the inlet pipe is connected to an external pipeline, and an inlet valve is provided on the inlet pipe; the liquid discharge port is connected to a discharge pipe, the discharge pipe is connected to an external pipeline, and a discharge valve and a high-pressure discharge pump are provided on the discharge pipe.

[0008] Preferably, a pressure sensor is installed on the exhaust valve.

[0009] Preferably, the plurality of test probes include a suspended matter test probe, a pH value test probe and an oil content test probe.

[0010] Preferably, the suspended matter test probe, pH value test probe and oil content test probe are all distributed on the top of the collection tank and are all arranged vertically.

[0011] Preferably, three high-pressure nozzles are provided, and correspond one by one to the three test probes.

[0012] Preferably, it also includes a cleaning component, which includes a cleaning plate and a driving mechanism, the cleaning plate is horizontally arranged, and is provided with a plurality of cleaning holes corresponding to the test probes one by one; the inner diameter of the cleaning hole is slightly larger than the outer diameter of the test probe, and bristles are arranged on the inner wall; a plurality of vertical guide rails are provided on the inner wall of the collection groove, and a plurality of guide grooves slidingly matched with the guide rails are provided at the outer edge of the cleaning plate, and the cleaning plate is transmission-connected to the driving mechanism.

[0013] Preferably, the driving mechanism includes a motor, a lead screw and a nut seat, the motor is fixed at the top of the collecting trough, the lead screw is vertically arranged in the inner cavity of the collecting trough, the upper end of the lead screw is transmission connected to the motor, and the lower end of the lead screw is rotatably installed at the bottom of the collecting trough; the nut seat is sleeved on the lead screw and meshingly connected with the lead screw, and the nut seat is fixed on the cleaning plate.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The device is equipped with a variety of test probes for multi-parameter remote online monitoring, and a variety of test probes are in direct contact with the oil and gas field reinjection water, which improves the accuracy of measurement; the device truly realizes full-automatic water intake, testing, drainage, data storage, and data analysis, and can realize remote monitoring of personnel; the device ensures data accuracy through time-sharing and multiple measurements, and avoids the manpower and material costs caused by false alarms; the device realizes all-round cleaning of the test probes through the joint action of high-pressure nozzles and cleaning components, and improves the cleaning efficiency of the test probes, thereby improving the accuracy of water quality detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the utility model;

[0017] Figure 2 It is a rear view of the utility model;

[0018] Figure 3 is a cross-sectional view of the collection tank;

[0019] Figure 4 Schematic diagram of the structure of the cleaning plate.

[0020] In the figure: 1. collection tank, 2. alcohol water tank, 3. high liquid level probe, 4. suspended matter test probe, 5. pH value test probe, 6. oil content test probe, 7. exhaust valve, 8. pressure sensor, 9. low liquid level probe, 10. liquid inlet, 11. liquid discharge port, 12. high pressure nozzle, 13. cleaning pipe, 14. cleaning valve, 15. high pressure flushing pump, 16. liquid inlet pipe, 17. liquid inlet valve, 18. liquid discharge pipe, 19. liquid discharge valve, 20. high pressure liquid discharge pump, 21. cleaning plate, 2101, washing hole, 2102, guide groove, 22. bristles, 23. guide rail, 24. motor, 25. screw, 26. nut seat. DETAILED DESCRIPTION

[0021] The utility model is further described below with reference to the accompanying drawings and embodiments. Embodiment 1

[0022] Reference Figure 1-3 As shown, a multi-parameter remote online monitoring device for water quality of oil and gas field reinjection water includes a collection tank 1, a high liquid level probe 3 is provided on the top of the collection tank 1, and a low liquid level probe 9 and a drain port 11 are provided on the bottom; an exhaust valve 7 and multiple test probes are also installed on the top of the collection tank 1, and a liquid inlet 10 and multiple high-pressure nozzles 12 are also provided on the bottom.

[0023] It also includes an alcohol water tank 2. The high-pressure nozzle 12 is connected to a cleaning pipe 13. The cleaning pipe 13 is connected to an external pipeline and the alcohol water tank 2. A cleaning valve 14 and a high-pressure flushing pump 15 are provided on the cleaning pipe 13.

[0024] The liquid inlet 10 is connected to a liquid inlet pipe 16 , which is communicated with an external pipeline and has a liquid inlet valve 17 ; the liquid discharge port 11 is connected to a liquid discharge pipe 18 , which is communicated with an external pipeline and has a liquid discharge valve 19 and a high-pressure liquid discharge pump 20 .

[0025] In more detail, a pressure sensor 8 is installed on the exhaust valve 7 .

[0026] During the test, the device is pre-cleaned first. The pre-cleaning is divided into two modes, the normal mode and the deep cleaning mode. The normal mode is to use the sewage in the current pipeline for cleaning, and the deep cleaning mode is to use the alcohol water in the alcohol water tank 2 for cleaning. Before the test, the cleaning mode, cleaning frequency and duration can be manually set in advance. After entering the pre-cleaning step, the device will automatically open the cleaning valve 14 and the exhaust valve 7. Due to the pipeline pressure, the sewage will automatically enter the cleaning pipe 13, and then turn on the high-pressure flushing pump 15. The oilfield sewage will be driven into the collection tank 1 through multiple high-pressure nozzles 12, and the surface of the test probe will be cleaned by jet. After maintaining a configurable cleaning time, the software will automatically start the high-pressure drainage pump 20, and the sewage in the tank will be injected into the incoming water pipeline through the drainage port 11 until the low liquid level probe 9 detects that the sewage has been emptied. After the pre-cleaning is completed, the device automatically enters the sampling measurement step. The device automatically opens the inlet valve 17 and the exhaust valve 7, and the sewage flows into the collection tank 1 until the high liquid level probe 3 detects the liquid level. After that, multiple test probes are measured in turn (to avoid mutual interference). Each sensor measures 10 times, removes the highest and lowest values, and takes the middle value for averaging. After the measurement, the final drainage step is entered, and the drainage valve 19, the exhaust valve 7, and the high-pressure drainage pump 20 are started to reversely inject the sewage in the tank into the incoming water pipe until the low liquid level probe 9 detects that the sewage has been emptied. Embodiment 2

[0027] As a preferred embodiment of the present utility model, this embodiment selects the type of test probe based on the first embodiment, specifically:

[0028] In this embodiment, the plurality of test probes include a suspended matter test probe 4, a pH value test probe 5 and an oil content test probe 6. The suspended matter test probe 4, the pH value test probe 5 and the oil content test probe 6 are all arranged on the top of the collection tank 1 and are all arranged vertically.

[0029] In more detail, three high-pressure nozzles 12 are provided, and they correspond one by one to the three test probes. Embodiment 3

[0030] As a preferred embodiment of the utility model, this embodiment can also be equipped with additional dissolved oxygen and corrosion monitoring probes on the premise that the testing principles and steps of the second embodiment remain unchanged, thereby further improving the practicality of the device. Embodiment 4

[0031] As a preferred embodiment of the present utility model, this embodiment adds a cleaning component on the basis of the second embodiment, specifically:

[0032] Reference Figure 3-4As shown, the present embodiment further includes a cleaning component, which includes a cleaning plate 21 and a driving mechanism. The cleaning plate 21 is horizontally arranged, and is provided with three brushing holes 2101 corresponding to the test probes one by one. The inner diameter of the brushing hole 2101 is slightly larger than the outer diameter of the test probe, and bristles 22 are arranged on the inner wall thereof. A vertical guide rail 23 is provided on the inner wall on both sides of the collecting groove 1, and guide grooves 2102 slidably matched with the guide rail 23 are provided on the outer edges on both sides of the cleaning plate 21, and the cleaning plate 21 is transmission-connected to the driving mechanism.

[0033] After entering the pre-cleaning step, the cleaning components are synchronously operated, and the driving mechanism drives the cleaning plate 21 to perform lifting and reciprocating motions along the guide rail 23, so that the bristles 22 on the cleaning plate 21 repeatedly brush the outer surface of the test probe.

[0034] The device realizes all-round cleaning of the test probe through the combined action of the high-pressure nozzle 12 and the cleaning component, improves the cleaning efficiency of the test probe, and improves the accuracy of water quality detection. Embodiment 5

[0035] As a preferred embodiment of the present utility model, this embodiment designs the driving mechanism on the basis of the fourth embodiment, specifically:

[0036] In this embodiment, the driving mechanism includes a motor 24, a lead screw 25 and a nut seat 26. The motor 24 is fixed at the top of the collection trough 1. The lead screw 25 is vertically arranged in the inner cavity of the collection trough 1, and its upper end is transmission-connected to the motor 24, and its lower end is rotatably installed at the bottom of the collection trough 1; the nut seat 26 is sleeved on the lead screw 25 and meshingly connected with the lead screw 25, and the nut seat 26 is fixed on the cleaning plate 21.

[0037] During pre-cleaning, the motor 24 is started to drive the lead screw 25 to rotate, thereby driving the nut seat 26 and the cleaning plate 21 to perform lifting and reciprocating motions along the guide rail 23 .

[0038] In summary, the device is equipped with a variety of test probes for multi-parameter remote online monitoring, and a variety of test probes are in direct contact with the oil and gas field reinjection water, which improves the accuracy of measurement; the device truly realizes full-automatic water intake, testing, drainage, data storage, and data analysis, and can realize remote monitoring of personnel; the device ensures data accuracy through multiple measurements in time sharing, avoiding the manpower and material costs caused by false alarms.

[0039] The present invention is not limited to the above-mentioned implementation modes. Within the knowledge scope of those skilled in the art, various changes can be made without departing from the purpose of the present invention. The changed contents still belong to the protection scope of the present invention.

Claims

1. A multi-parameter remote online monitoring device for water quality of oil and gas field reinjection water, comprising a collection tank, a high liquid level probe is provided on the top of the collection tank, and a low liquid level probe and a drain port are provided on the bottom; the characteristics are: The top of the collection tank is also equipped with an exhaust valve and multiple test probes, and the bottom is also equipped with a liquid inlet and multiple high-pressure nozzles; It also includes an alcohol water tank. The high-pressure nozzle is connected to a cleaning pipe, which is communicated with an external pipeline and the alcohol water tank. A cleaning valve and a high-pressure flushing pump are provided on the cleaning pipe.

2. The multi-parameter remote online monitoring device for water quality of oil and gas field reinjection water according to claim 1, characterized in that: The liquid inlet is connected to a liquid inlet pipe, which is communicated with an external pipeline and has a liquid inlet valve; the liquid discharge port is connected to a liquid discharge pipe, which is communicated with an external pipeline and has a liquid discharge valve and a high-pressure liquid discharge pump.

3. The multi-parameter remote online monitoring device for water quality of oil and gas field reinjection water according to claim 1, characterized in that: A pressure sensor is installed on the exhaust valve.

4. The multi-parameter remote online monitoring device for water quality of oil and gas field reinjection water according to claim 1, characterized in that: The multiple test probes include a suspended matter test probe, a pH value test probe and an oil content test probe.

5. The multi-parameter remote online monitoring device for water quality of oil and gas field reinjection water according to claim 4, characterized in that: The suspended matter test probe, the pH value test probe and the oil content test probe are all distributed on the top of the collection tank and are all arranged vertically.

6. The multi-parameter remote online monitoring device for water quality of oil and gas field reinjection water according to claim 5, characterized in that: The high-pressure nozzles are provided with three and correspond one to another in the upper and lower parts with respect to the three test probes.

7. The multi-parameter remote online monitoring device for water quality of oil and gas field reinjection water according to claim 5, characterized in that: It also includes a cleaning component, which includes a cleaning plate and a driving mechanism. The cleaning plate is horizontally arranged, and is provided with a plurality of cleaning holes corresponding to the test probes one by one. The inner diameter of the cleaning hole is slightly larger than the outer diameter of the test probe, and bristles are arranged on the inner wall. The inner wall of the collection groove is provided with a plurality of vertical guide rails, and the outer edge of the cleaning plate is provided with a plurality of guide grooves that slide with the guide rails, and the cleaning plate is connected to the driving mechanism in a transmission manner.

8. The multi-parameter remote online monitoring device for water quality of oil and gas field reinjection water according to claim 7, characterized in that: The driving mechanism includes a motor, a lead screw and a nut seat. The motor is fixed on the top of the collection trough. The lead screw is vertically arranged in the inner cavity of the collection trough, the upper end of which is transmission connected to the motor, and the lower end of which is rotatably installed on the bottom of the collection trough; the nut seat is sleeved on the lead screw and meshed with the lead screw, and the nut seat is fixed on the cleaning plate.

Images