It is reported that on November 21, 2017, China National Offshore Oil Corporation applied for a national invention authorized patent-an online monitoring and diagnosis system and method for the performance of underwater Christmas tree hydraulic valves. The invention belongs to the technical field of underwater oil and gas development, and in particular relates to a system and method for online real-time monitoring and diagnosis of the performance of underwater Christmas tree hydraulic valves based on computer data acquisition and analysis.
Background of the inventionUnderwater Christmas tree is one of the key equipment for deep-water oil and gas field development. There are more than 10 hydraulic control valves installed on each underwater Christmas tree. The reliability of the valve directly affects the safe operation of deep-water oil and gas fields. Therefore, in daily production operations, it is necessary to focus on whether the Christmas tree valve is closed and opened normally, and whether there is hydraulic leakage. The current common practice is to use engineering ships to carry underwater robots to inspect all parts of the Christmas tree, and to open and close the valves one by one to confirm whether the switch status is normal. The advantage of this approach is that the inspection is fully in place, but the disadvantages are also particularly prominent: (1) It takes a long time for one operation, low efficiency, and cannot detect the performance of Christmas tree valves in real time; (2) The operation of engineering ships and underwater robots is easy Affected by bad weather and sea conditions, the inspection work is affected, and even the operation is suspended; (3) There are safety risks for personnel and equipment in offshore construction operations; (4) Marine operations require large-scale engineering equipment and a large number of operators, and the operation cost is high .
In order to overcome the above shortcomings of manual detection, it is necessary to improve the existing technology and develop a monitoring and diagnosis system that automatically detects the hydraulic valves of the underwater Christmas tree, which is used to replace the related work of engineering ships and underwater robots.
Summary of the inventionThe purpose of the present invention is to provide an on-line monitoring and diagnosis system and method for the performance of the hydraulic valve of an underwater Christmas tree, to replace the related work of engineering ships and underwater robots, and complete the online real-time data collection, storage and performance analysis of the hydraulic valve of the Christmas tree , Fault identification and diagnosis, hydraulic leakage analysis, leakage calculation, curve graphics and alarm information display, diagnosis report printing, etc., to perform timely and accurate analysis of valve performance and faults.
![[New patent introduction] On-line monitoring and diagnosis system and method for the performance of underwater Christmas tree hydraulic valve](http://i.bosscdn.com/blog/o4/YB/AF/tKsbGAa6hVAAC0gSGi0PU025.jpg)
The figure is a schematic diagram of the system structure of the present invention
The present invention is based on the following principle: during the opening process of each hydraulic valve, its supply hydraulic pressure and actuator hydraulic pressure change over time to form its own unique curve. If the actual curve is different from the standard curve when the valve is working normally The difference indicates that the valve is faulty. By analyzing the difference between the actual curve and the standard curve in different time periods, the cause of the problem can be found; at the same time, the hydraulic valve is closed, its discharge hydraulic pressure and actuator hydraulic pressure As time changes, a unique curve different from the opening process is formed. By analyzing the difference between the actual curve and the standard curve at different time periods, the cause of valve failure can also be found; at the same time, the supply on the Christmas tree can be tracked and analyzed. The change trend of hydraulic pressure, valve switching times and hydraulic fluid consumption can identify whether there is hydraulic fluid leakage in the underwater Christmas tree. Utilize the existing control systems and equipment of deepwater oil and gas field development equipment, collect relevant hydraulic data, set up corresponding application modules and databases to form an online real-time monitoring and diagnosis system for the performance of underwater Christmas tree hydraulic valves.
In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is as follows: an online monitoring and diagnosis system for the performance of the hydraulic valve of an underwater Christmas tree, which is characterized in that it includes a data collection part and a data processing part; the data collection part collects water separately The hydraulic data in the lower electronic module and/or hydraulic supply module and/or production control system is transmitted to the data processing part; the data processing part stores and processes the hydraulic data, and compares it with the standard hydraulic data stored in advance , Analysis, output test results and diagnostic information.
Specifically, the underwater electronic module data collected by the data collection part includes the hydraulic supply pressure of each underwater Christmas tree valve during the opening process, the actuator hydraulic pressure, the valve opening time, and the valve actuator during the closing process Hydraulic pressure, hydraulic discharge pressure, valve closing time; the above data is sent to the data processing part for storage and analysis, forming two hydraulic pressure curves, which are respectively compared with the two standard hydraulic pressure curves pre-stored in the database to open and close the valve. Obtain whether the valve's working state is normal, whether there is a fault and what kind of fault there is, and output the fault alarm information and the classification diagnosis report of the valve performance.
The hydraulic data in the production control system includes data on the number of valve switching times and hydraulic fluid consumption data from the MCS on the water. The above data is transmitted to the data processing part, combined with the hydraulic pressure data of the underwater Christmas tree to form a curve, and The standard data is compared and analyzed to obtain whether there is a leakage in the hydraulic pressure of the underwater Christmas tree, and the leakage amount is calculated, and the alarm prompt of the hydraulic fluid leakage is displayed.
The data processing part includes a data processing station and output equipment; the data processing station includes a data storage and calling module, a condition setting module, a hydraulic curve module, a valve performance analysis module, a hydraulic leakage analysis module, an alarm module, and a report report module The output device includes a display, a printer and an alarm device. The data processing part is a part of the water control center, which is realized by adding corresponding functional modules on the basis of the original production control system.
An online monitoring and diagnosis method for the performance of hydraulic valves of an underwater Christmas tree, characterized in that the method comprises the following steps: (1) Data collection: collecting underwater electronic modules and/or hydraulic supply modules and/or production control systems The hydraulic data is transmitted to the data processing part; (2) Data processing: the hydraulic data is stored and processed, combined with the pre-stored standard data for comparative analysis; (3) Output: through the display and/or printer and/or The alarm device outputs detection and diagnosis information.
Specifically, the data collection and processing include: (1) The collection includes the hydraulic supply pressure of each underwater Christmas tree valve during the opening process, the actuator hydraulic pressure, the valve opening time, and the execution of the valve during the closing process. Hydraulic pressure, hydraulic discharge pressure, valve closing time; the above data is transferred to the data processing part for storage and analysis, forming two hydraulic pressure curves, which are respectively compared with the two standard hydraulic pressure curves pre-stored in the database to open and close the valve , Obtain whether the valve working status is normal, whether there is a fault and what kind of fault there is, and output the fault alarm information and the graded diagnosis report of the valve performance; (2) Count the valve switching times and hydraulic fluid consumption from the MCS on the water The above-mentioned data is transmitted to the data processing part, combined with the hydraulic pressure data of the underwater Christmas tree to form a curve, and compared with the standard data to obtain whether there is a leakage in the hydraulic pressure of the underwater Christmas tree and calculate the leakage amount, and display the alarm of the hydraulic fluid leakage prompt.
The present invention makes full use of existing production control equipment and systems, adds corresponding application modules to complete data collection and transmission; all data processing is modularized, which is convenient for modification and expansion; outputting and displaying graphic information and generating reports are convenient for implementing detection. The beneficial effects of the present invention are: (1) Online real-time collection and analysis of data, greatly improving production efficiency; (2) Not affected by severe weather and sea conditions, the automatic detection system can continuously monitor the working conditions of the underwater valve Carry out detection and diagnosis; (3) Eliminate the safety risks of personnel and equipment during construction operations with existing technologies; (4) Save costs. This system can be applied to the monitoring and diagnosis of various underwater hydraulic valves. It is no longer necessary to dispatch large-scale engineering equipment and a large number of operators during operation, which can greatly save personnel and equipment costs.
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