Pipeline Leak Detection:
Early detection and locating of leakage in liquid pipelines is a serious challenge for the pipeline operators, share holders, and owners of the lost quantity. Official statistics show considerable property (and environmental) damages each year due to pipe leakage, and in all cases, absence of an effective leak detection system is eminent. Pipeline companies therefore, would rather invest in a reliable leak detection system to reduce their risks. Such a system must be able to generate the quickest possible alarm when a leakage occurs. In addition, it must provide accurate information related to the location of the leakage. And last but not least, it must not generate false alarms.
That is why we propose "LEAK HUNTER".
NETICO LEAK DETECTION SYSTEM – LEAK HUNTER
Leak Hunter can alert, quickly detect, pin-point the quantity and the precise location of a leak in oil or water pipelines. This helps in taking decisive action to prevent financial and environmental damages with reduced inspection time.
The Leak Hunter application can function as a stand-alone, independent, alarm system, or it can be integrated with an existing programmable logic controllers, SCADA systems, facility automation-management systems, and distributed control systems.
For normal operation, Leak Hunter requires an Intel based personal computer or a server running a version of MS Windows operating system, and a reliable network connection. An existing computing infrastructure can be reused, thus minimizing system installation and maintenance costs. Leak Hunter is also installed and interfaced to the existing systems with none or very minimal disruption to the normal pipeline operations.
Interfacing with different software and hardware is a common practice in the oil and gas industry, since different equipment and software systems are necessary for normal pipeline operation. Even if your existing system does not support standard integration interfaces, Netico will design and implement an adequate interfacing solution on project basis, in order to maximize the potential of your existing infrastructure.
HOW DOES IT WORK?
PRESSURE WAVE PROPAGATION METHOD
A spontaneous leak will cause a negative pressure wave in the pipeline, simply because liquid is leaking out. This pressure wave will travel through the pipeline at the speed of sound in the liquid flowing through the pipeline. Depending on the location of the leak, the pressure wave will arrive at some pressure measurement points before it arrives at the others. The leak position can be calculated from the difference in these arrival times. Calculation is adjusted through various measured or simulated parameters that can influence propagation speed and compensate for measurement equipment imprecision.
LEAK HUNTER PRESSURE WAVE PROPAGATION
MASS BALANCE ALGORITHM
PIPELINE STATE MACHINE
Leak Hunter supports a pipeline state machine (stable stationary, transit-transient, stable transport) decision making algorithm. Pipeline state can be also changed / forced by the user at any time. Pipeline state is changed based on the monitoring of valve and pump statuses. Current pipeline state is used for leakage decision making and elimination of false alarms.
Reliability is achieved through implementation of three independent leak detection algorithms:
• Pressure & flow disturbance pattern recognition
• Disturbances propagation pattern recognition
• Real measurement vs. model prediction.
Leak Hunter allows definition of the pipeline model which consists of pipe geometry and material properties, and includes information such as ground elevation, route, pipe cross-section profile, etc. Based on the model, it is possible to simulate pipeline performance and compare it in real time to the actual, measured, performance.
Accuracy of the leak position and estimated leak quantities is achieved using following principles and techniques:
Netico Leak Detection System can alert, quickly detect, pinpoint the quantity and the precise location of a leak and help you take decisive action with reduced inspection time before that damage is done.
Leak Hunter can be installed on a personal computer or server based x86 PC running a MS Windows based operating system already owned by the customer or newly acquired, which means that new hardware costs are minimal. Leak Hunter is installed and interfaced without any or with minimal disruption to the pipeline or instrumentation systems operation already running at the site.
STAND ALONE OPERATION
Netico Leak Hunter application can function as stand-alone independent alarm system or it can be integrated with existing or newly installed programmable logic controllers, SCADA systems, facility automation-management systems and distributed control systems
Leak Hunter provides an open Application Programmer Interface (API) to facilitate integration to the existing infrastructure, which does not adhere to the supported communication standards, but is used in a concrete customer case.
NODE PRESSURE HISTORY
Leak Hunter provides a high resolution data storage buffer for all the pipeline measurements in immediate past. This data buffer is used for more efficient real time calculations required by the implemented leakage detection algorithms.
Real time pipeline monitoring based on tracking pressure, density, mass and volume flow, fluid speed, temperature, viscosity, valve and pump statuses in real time. Possibility for a user to predefine, enable or disable interventions on measurement data.
Monitors the head and tail position of each product batch as it enters a pipeline, calculates the Estimated Time of Arrival (ETA) of each batch at every delivery point continuously.