CONTROSTM Leak Detection Sensor Suite

Hydrocarbons in seawater are a multiphase mix consisting of an oil phase, gas bubbles, dissolved gas in seawater, formation water, cold seawater and solid gas hydrate phase. In order to detect and localize any hydrocarbon emission at the earliest stage possible and under any environmental conditions, the CONTROS™ Leak Detection Sensor Suite uses a combination of direct and indirect methods, utilizing the fact that the oil phase contains significant amounts of PAH, whereas the gas phase contains mainly methane.

This allows for

• a quick and reliable detection and localization of even the smallest hydrocarbon emissions,
• an accurate qualification and validation of the emissions, reducing the false alarm rate significantly,
• an accurate quantification of the emission, to get a feeling for the size of the leak.

Detect™ Leak Detection Software Suite

The Detect™ Leak Detection Software Suite has been developed to ensure quick and reliable subsea leak detection through trained ROV pilots and technicians.

• An integrated graphical display and an optional interface to the ROV operator display allows for easy detection and localization through simple status flags on the sea chart (green, yellow, red).
• An integrated expert mode allows for subsequent qualification, verification and quantification of the emissions and provides an impartial decision criterion for the operation.
• A Shapefile Geo-Tiff and BSB import and export allows for blending of several information layers like status flags with pipeline tracks and a sea chart.
• An integrated Survey Planning and Simulation Tool reduces the needed ship time significantly.

Application:	Detect oil and gas pipeline leaks
Operational depth:	max. 2000 m
Temperature:	4°C to 15°C
Measuring range:	CH4: 0,1 – 50 μmol/L ± 0.3 μmol/L PAH: 0 – 500 μg/L Temp: -4 - +40 °C ± 0.1 °C Cond: 0 – 60 mS/cm ± 0.001 mS/cm Press: 0 – 4000 dbar ± 1 dbar
Reaction time:	< 10 sec
Size:	Standard configuration 520 x 170 x 200 mm³
Weight:	12.3 kg in air / 9.2 kg in sea water
Material:	Titanium Grade 2 / Stainless Steel 1.4404
Pump:	SEABIRD SBE 5T
Power supply:	12 / 24 VDC @ 18W (max. 35 W on start-up)
Connector:	SUBCONN® MCBH8-M-TI 8-pin SUBCONN® MCBH5-F-TI 5-pin
Digital Output:	EIA-232, Data format ASCII NMEA-0183
Data Output:	19200, 8 data bits, no parity, 1 stop bit. No flow control
Software:	With DETECT™ Software Suite for graphical data visualization

Integration

The CONTROS™ Mobile Leak Detection System fully integrates a broad variety of additional oceanographic sensors for full coverage of any kind of anomalies:

• HydroC™ LDS
• HydroC™ CH₄, PAH and CO₂
• CTDs (RBR, Seabird and others)
• Fluorometer
• Diss. oxygen
• pH and Redox
• and more…