Shale gas exploitation site safety risk intelligent monitoring and early warning device

Abstract

The invention relates to a shale gas exploitation site safety risk intelligent monitoring and early warning device, and belongs to the technical field of shale gas, the shale gas exploitation site safety risk intelligent monitoring and early warning device comprises a monitoring pipeline, the surface of the monitoring pipeline is provided with a mounting assembly, and the surface of the mounting assembly is fixedly provided with an ultrasonic flowmeter; a supporting rod is fixedly connected to the bottom of the monitoring pipeline, a monitoring assembly is arranged at the bottom of the supporting rod, and a liquid discharging assembly is arranged at the bottom of the monitoring pipeline. According to the shale gas exploitation site safety risk intelligent monitoring and early warning device, through a linkage mechanism of the ultrasonic flowmeter, the pH sensor and the turbidimeter, the limitation of single parameter alarm is broken through, fluid physical property multi-dimensional cross validation is combined, unnecessary shutdown caused by flow fluctuation false triggering is effectively avoided, a reversing core structure driven by a motor is adopted, and the safety risk of the shale gas exploitation site is greatly improved. The liquid drainage direction can be switched according to the fluid risk level, compared with a traditional manual valve, the operation efficiency is improved by 90% or above, it is ensured that high-risk flowback liquid is rapidly isolated to a closed recovery system, and pollution diffusion is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of shale gas, and in particular to an intelligent monitoring and early warning device for safety risks at a shale gas mining site. Background Art

[0002] During shale gas extraction, sudden changes in flowback flow and abnormal fluid composition are precursors to major risks such as blowouts, pipeline corrosion, and environmental pollution. Traditional monitoring systems often use single-parameter threshold alarm mechanisms, such as independent ultrasonic flowmeters or intermittent manual sampling and testing. These systems suffer from three major technical bottlenecks: First, when the flowmeter detects abnormal fluctuations, it cannot trigger rapid in-situ fluid composition testing, resulting in a high rate of misjudgment of risks; second, conventional drainage pipelines lack intelligent diversion mechanisms, making it difficult to isolate contaminated fluids in a timely manner; and third, manual sampling and analysis have a long lag, making it difficult to provide real-time data support for fracturing fluid ratio adjustments and emergency shutdown decisions.

[0003] In view of this, there is an urgent need to develop a monitoring and early warning device with the closed-loop control capability of "abnormal perception-intelligent verification-directional disposal", trigger multi-dimensional fluid verification through abnormal flow events, and link the actuators to achieve rapid isolation of risky fluids, thereby breaking through the technical limitations of traditional monitoring systems with delayed response and passive disposal, and ensuring the safety and controllability of the entire shale gas extraction process. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides an intelligent monitoring and early warning device for safety risks at shale gas mining sites. It has the advantages of combining multiple verification linkage trigger mechanisms and achieving rapid isolation of risky fluids, solving the limitations of traditional single-parameter alarms and the passive handling problems.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An intelligent monitoring and early warning device for safety risks at a shale gas mining site includes a monitoring pipe, a mounting assembly provided on the surface of the monitoring pipe, and an ultrasonic flowmeter fixedly mounted on the surface of the mounting assembly; a support rod fixedly connected to the bottom of the monitoring pipe, a monitoring assembly provided at the bottom of the support rod, and a drainage assembly provided at the bottom of the monitoring pipe;

[0007] The monitoring assembly includes a first motor fixedly connected to the bottom of the support rod, the output shaft of the first motor is fixedly connected to a connecting frame, a sampling cylinder is clamped inside the connecting frame, a fixing ring is fixedly connected to the outer surface of the support rod, a pH sensor and a turbidity meter are respectively sleeved on the outer wall of the fixing ring, and two electric push rods are fixedly installed on the surface of the fixing ring, and the output shafts of the two electric push rods are respectively fixedly connected to the pH sensor and the turbidity meter;

[0008] The drainage assembly includes a drainage pipe connected to the bottom of the monitoring pipe, the bottom of the drainage pipe is connected to a connecting pipe, the bottom of the connecting pipe is closed, a second motor is fixedly installed on the bottom of the connecting pipe, the output shaft of the second motor extends to the interior of the connecting pipe and is fixedly connected to a reversing core, a drainage channel is opened inside the reversing core, and the left and right ends of the connecting pipe are connected to drainage pipes.

[0009] Furthermore, the installation assembly includes two clamps, which are clamped to the surface of the monitoring pipe. The surface of the clamp is fixedly connected with a non-slip rubber pad, and the bottom of the two clamps is fixedly connected with a connecting plate, and the bottom of the connecting plate is fixedly installed with a locking assembly.

[0010] Furthermore, the locking assembly includes a threaded tube fixedly connected to the connecting plate, the internal thread of the threaded tube is connected to a tightening screw, and the top end of the tightening screw is fixedly connected to a rubber ring.

[0011] Furthermore, the clamp consists of two half hoops, which are connected by bolts.

[0012] Furthermore, the detection head of the ultrasonic flowmeter penetrates and extends into the interior of the monitoring pipe, and the detection head of the ultrasonic flowmeter is fixed to the inner wall of the monitoring pipe.

[0013] Furthermore, the commutating core is a cylinder, and the surface of the commutating core is in contact with the inner wall of the connecting tube.

[0014] Furthermore, a mounting seat is fixedly installed on the top of the monitoring pipeline, and a control box is fixedly installed on the top of the mounting seat.

[0015] Furthermore, the control box includes a control module, a storage module, an alarm module and a wireless communication module. The control module is electrically connected to the ultrasonic flowmeter, pH sensor, turbidity meter, first motor, electric push rod and second motor, and is used to collect flow, pH value, turbidity data in real time and dynamically control the rotation angle of the sampling tube, sensor extension and discharge direction.

[0016] Furthermore, the storage module has a built-in time series database for storing historical monitoring data and preset risk threshold models. The alarm module includes an audible and visual alarm and a remote push unit. When the monitoring data exceeds the threshold or fluctuates abnormally, it synchronously triggers on-site warnings and mobile terminal early warnings.

[0017] Furthermore, the wireless communication module supports 5G / LoRa dual-mode transmission, synchronizes real-time data to the cloud monitoring platform, and receives remote control instructions to achieve adaptive adjustment.

[0018] Compared with the existing technology, the present invention provides an intelligent monitoring and early warning device for safety risks at shale gas mining sites, which has the following beneficial effects:

[0019] 1. This intelligent monitoring and early warning device for safety risks at shale gas production sites uses a linkage triggering mechanism between an ultrasonic flowmeter, a pH sensor, and a turbidity meter to overcome the limitations of traditional single-parameter alarms. Combined with multi-dimensional cross-verification of fluid properties, it effectively avoids unnecessary downtime caused by false triggering of flow fluctuations.

[0020] 2. This intelligent monitoring and early warning device for safety risks at shale gas mining sites uses a motor-driven reversing core structure that can switch the discharge direction according to the fluid risk level. Compared with traditional manual valve operation efficiency, it is more than 90% higher, ensuring that high-risk return fluids are quickly isolated to a closed recovery system to prevent the spread of contamination.

[0021] 3. This intelligent monitoring and early warning device for safety risks at shale gas mining sites uses a clamp-type mounting assembly and a locking structure to enable rapid assembly and disassembly of the monitoring device. A single operator can complete sensor replacement or pipeline maintenance within ten minutes, saving 80% of maintenance time compared to traditional welding installations, and no special tools are required. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the structure of the present invention;

[0023] Figure 2 It is a back view of the structure of the present invention;

[0024] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of part A;

[0025] Figure 4 Schematic diagram of the commutation core structure of the present invention;

[0026] Figure 5 It is a front view of the structure of the present invention;

[0027] Figure 6 This is a block diagram of the system modules of the present invention.

[0028] In the figure: 1 monitoring pipeline, 2 ultrasonic flowmeter, 3 support rod, 4 first motor, 5 connecting frame, 6 sampling tube, 7 fixing ring, 8 electric push rod, 9 pH sensor, 10 turbidity meter, 11 drainage pipe, 12 connecting pipe, 13 second motor, 14 reversing core, 15 drainage channel, 16 liquid outlet pipe, 17 clamp, 18 connecting plate, 19 threaded pipe, 20 tightening screw, 21 mounting base, 22 control box. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] See also Figures 1 to 6 In this embodiment, an intelligent monitoring and early warning device for safety risks at a shale gas production site includes a monitoring pipeline 1, a mounting assembly disposed on the surface of the monitoring pipeline 1, and an ultrasonic flowmeter 2 fixedly mounted on the surface of the mounting assembly. The detection head of the ultrasonic flowmeter 2 extends through and into the interior of the monitoring pipeline 1 and is fixed to the inner wall of the monitoring pipeline 1. A support rod 3 is fixedly connected to the bottom of the monitoring pipeline 1, and a monitoring assembly is disposed at the bottom of the support rod 3. A drainage assembly is also disposed at the bottom of the monitoring pipeline 1.

[0031] The drainage component includes a drainage pipe 11 connected to the bottom of the monitoring pipe 1, the bottom of the drainage pipe 11 is connected to a connecting pipe 12, the bottom of the connecting pipe 12 is closed, and a second motor 13 is fixedly installed at the bottom of the connecting pipe 12. The output shaft of the second motor 13 extends to the interior of the connecting pipe 12 and is fixedly connected to a reversing core 14. The reversing core 14 is a cylinder, and the surface of the reversing core 14 fits the inner wall of the connecting pipe 12. A drainage channel 15 is opened inside the reversing core 14, and the left and right ends of the connecting pipe 12 are connected to a liquid outlet pipe 16.

[0032] The second motor 13 drives the reversing core 14 to rotate. When the reversing core 14 connects to the left liquid outlet pipe 16, the return fluid in the monitoring pipeline 1 is discharged through the liquid outlet pipe 16 into the monitoring assembly for further verification using the monitoring assembly. When the return fluid exceeds a threshold value after verification, the second motor 13 is reversed, connecting the reversing core 14 to the right liquid outlet pipe 16, thereby directing the contaminated fluid into the closed recovery system through the right liquid outlet pipe 16.

[0033] Among them, the monitoring component includes a first motor 4 fixedly connected to the bottom of the support rod 3, the output shaft of the first motor 4 is fixedly connected to the connecting frame 5, the interior of the connecting frame 5 is clamped with a sampling tube 6, the outer surface of the support rod 3 is fixedly connected to a fixing ring 7, the outer wall of the fixing ring 7 is respectively sleeved with a pH sensor 9 and a turbidity meter 10, and two electric push rods 8 are fixedly installed on the surface of the fixing ring 7, and the output shafts of the two electric push rods 8 are respectively fixedly connected to the pH sensor 9 and the turbidity meter 10.

[0034] The return liquid is discharged into the sampling tube 6 through the liquid outlet pipe 16 on the left, and the connecting frame 5 is driven to rotate by the second motor 4. When it rotates to the bottom of the pH sensor 9 or the turbidity meter 10 in turn, it is driven by the corresponding connected electric push rod 8 and extends into the interior of the sampling tube 6 for detection. The sensor continuously collects 5 sets of data at a frequency of 1Hz, and the average value is taken after eliminating abnormal values.

[0035] In an embodiment, the installation assembly includes two clamps 17, which are clamped to the surface of the monitoring pipe 1, and the surface of the clamp 17 is fixedly connected with a non-slip rubber pad. The bottoms of the two clamps 17 are fixedly connected with a connecting plate 18, and the bottom of the connecting plate 18 is fixedly installed with a locking assembly. The locking assembly includes a threaded tube 19 fixedly connected to the connecting plate 18, and the internal thread of the threaded tube 19 is connected to a tightening screw 20, and the top of the tightening screw 20 is fixedly connected to a rubber ring.

[0036] It should be noted that the clamp 17 is composed of two half hoops, which are connected by bolts. The half hoops can be disassembled by removing the bolts, and the installation position can be adaptively adjusted.

[0037] The ultrasonic flowmeter 2 can be placed on the clamp 17. By rotating the tightening screw 20, the tightening screw 20 is rotatably connected to the threaded tube 19, so that the tightening screw 20 can be moved to fix the ultrasonic flowmeter 2 and facilitate maintenance.

[0038] A mounting base 21 is fixedly mounted on the top of the monitoring pipe 1, and a control box 22 is fixedly mounted on the top of the mounting base 21. The control box 22 includes a control module, a storage module, an alarm module and a wireless communication module.

[0039] Specifically, the control module is electrically connected to the ultrasonic flowmeter 2, pH sensor 9, turbidity meter 10, first motor 4, electric push rod 8 and second motor 13, and is used to collect flow, pH value, turbidity data in real time and dynamically control the rotation angle of the sampling tube 6, sensor extension and discharge direction.

[0040] The storage module has a built-in time series database for storing historical monitoring data and preset risk threshold models. The alarm module includes an audible and visual alarm and a remote push unit. When the monitoring data exceeds the threshold or fluctuates abnormally, it will simultaneously trigger on-site warnings and mobile terminal early warnings.

[0041] It should be noted that the data collected by the storage module can be used to study the overflow and blowout laws of shale gas extraction, establish an overflow and blowout risk warning model for the main process, develop real-time prediction and warning software for overflow and blowout risks, improve the level of shale gas extraction risk management and control, and enhance the ability to prevent major overflow and blowout accidents.

[0042] The wireless communication module supports 5G / LoRa dual-mode transmission, synchronizes real-time data to the cloud monitoring platform, and receives remote control commands to achieve adaptive adjustment.

[0043] The working principle of the above embodiment is:

[0044] When the control module starts, it loads the preset risk threshold model from the storage module. The wireless communication module establishes a 5G connection with the cloud platform to synchronize device status. The ultrasonic flowmeter 3 collects flowback flow data at a frequency of 10 Hz. When the flow rate exceeds the set threshold or the rate of change per unit time exceeds ±15%, an abnormal event flag is triggered. The control module records the current timestamp and flow data and broadcasts a warning signal to adjacent nodes via LoRa. The control module activates the first motor 4 to rotate the connecting frame 5, causing the sampling cylinder 6 to rotate below the pH sensor 9 and turbidity meter 10, respectively. The sensors continuously collect five sets of data at a frequency of 1 Hz, eliminating outliers and averaging them. The control module inputs the real-time pH and turbidity data into the risk threshold model. If the fluid is determined to be high-risk, the control module triggers the alarm module to activate an audible and visual alarm. The wireless communication module pushes the alarm information and detection data to a pre-set mobile terminal. The control module controls the rotation of the second motor 13, driving the reversing core 14 to switch the drainage channel 15 to the right drainage pipe 16, directing the contaminated fluid into the closed recovery system.

[0045] The installation method, connection method or setting method disclosed in the embodiment are all common mechanical connection methods, and can be implemented as long as they can achieve their beneficial effects. In addition, the electrical components appearing in this embodiment are all electrically connected to the main controller and the battery. The main controller can be a conventional known device such as a computer that plays a control role. Technicians in this field can control the electrical components through simple programming, and the existing disclosed power connection technology is also common knowledge in this field, so the specific structural composition and working principle will not be described in detail in this embodiment.

[0046] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent monitoring and early warning device for safety risks at a shale gas mining site, comprising a monitoring pipeline (1), characterized in that: The surface of the monitoring pipe (1) is provided with a mounting assembly, an ultrasonic flowmeter (2) is fixedly mounted on the surface of the mounting assembly, a support rod (3) is fixedly connected to the bottom of the monitoring pipe (1), a monitoring assembly is provided at the bottom of the support rod (3), and a drainage assembly is provided at the bottom of the monitoring pipe (1); The monitoring assembly comprises a first motor (4) fixedly connected to the bottom of the support rod (3); the output shaft of the first motor (4) is fixedly connected to a connecting frame (5); a sampling tube (6) is clamped inside the connecting frame (5); a fixing ring (7) is fixedly connected to the outer surface of the support rod (3); a pH sensor (9) and a turbidity meter (10) are respectively sleeved on the outer wall of the fixing ring (7); two electric push rods (8) are fixedly installed on the surface of the fixing ring (7); the output shafts of the two electric push rods (8) are respectively fixedly connected to the pH sensor (9) and the turbidity meter (10); The drainage assembly comprises a drainage pipe (11) connected to the bottom of the monitoring pipe (1); the bottom of the drainage pipe (11) is connected to a connecting pipe (12); the bottom of the connecting pipe (12) is closed; a second motor (13) is fixedly installed at the bottom of the connecting pipe (12); the output shaft of the second motor (13) extends to the interior of the connecting pipe (12) and is fixedly connected to a reversing core (14); a drainage channel (15) is provided inside the reversing core (14); and both left and right ends of the connecting pipe (12) are connected to liquid outlet pipes (16).

2. The intelligent monitoring and early warning device for safety risks at shale gas mining sites according to claim 1 is characterized by: The mounting assembly comprises two clamps (17), the clamps (17) being clamped to the surface of the monitoring pipe (1), the surface of the clamps (17) being fixedly connected with a non-slip rubber pad, the bottoms of the two clamps (17) being fixedly connected with a connecting plate (18), and the bottoms of the connecting plates (18) being fixedly installed with a locking assembly.

3. The intelligent monitoring and early warning device for safety risks at shale gas mining sites according to claim 2 is characterized by: The locking assembly includes a threaded tube (19) fixedly connected to the connecting plate (18); the internal thread of the threaded tube (19) is connected to a tightening screw (20); and the top end of the tightening screw (20) is fixedly connected to a rubber ring.

4. The intelligent monitoring and early warning device for safety risks at shale gas mining sites according to claim 2 is characterized by: The clamp (17) consists of two half hoops, which are connected by bolts.

5. The intelligent monitoring and early warning device for safety risks at shale gas mining sites according to claim 1 is characterized by: The detection head of the ultrasonic flow meter (2) penetrates and extends into the interior of the monitoring pipe (1), and the detection head of the ultrasonic flow meter (2) is fixed to the inner wall of the monitoring pipe (1).

6. The intelligent monitoring and early warning device for safety risks at shale gas mining sites according to claim 1 is characterized by: The reversing core (14) is a cylinder, and the surface of the reversing core (14) is in contact with the inner wall of the connecting tube (12).

7. The intelligent monitoring and early warning device for safety risks at shale gas mining sites according to claim 1 is characterized by: A mounting seat (21) is fixedly mounted on the top of the monitoring pipeline (1), and a control box (22) is fixedly mounted on the top of the mounting seat (21).

8. The intelligent monitoring and early warning device for safety risks at shale gas mining sites according to claim 7 is characterized by: The control box (22) includes a control module, a storage module, an alarm module and a wireless communication module. The control module is electrically connected to the ultrasonic flow meter (2), the pH sensor (9), the turbidity meter (10), the first motor (4), the electric push rod (8) and the second motor (13), and is used to collect flow rate, pH value and turbidity data in real time and dynamically control the rotation angle of the sampling tube (6), the extension and contraction of the sensor and the discharge direction.

9. The intelligent monitoring and early warning device for safety risks at shale gas mining sites according to claim 8, characterized in that: The storage module has a built-in time series database for storing historical monitoring data and preset risk threshold models. The alarm module includes an audible and visual alarm and a remote push unit. When the monitoring data exceeds the threshold or fluctuates abnormally, it synchronously triggers on-site warnings and mobile terminal early warnings.

10. The intelligent monitoring and early warning device for safety risks at shale gas mining sites according to claim 8, characterized in that: The wireless communication module supports 5G / LoRa dual-mode transmission, synchronizes real-time data to the cloud monitoring platform, and receives remote control instructions to achieve adaptive adjustment.

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