Global acoustic leak Detector (alD)

Global Acoustic
Leak Detector (ALD)
For subsea structures
Naxys™ Global Acoustic
Leak Detector (ALD)
for subsea structures
FEATURES
The Naxys™ ALD is an ultra sensitive instrument that
detects both liquid and gas leaks to the subsea
environment.
Easy Installation
Installation is performed by ROV. Power
and communication is via wet-mateable
connector. Interfaces with all common
subsea control modules.
The instrument comprises a 3-dimensional array
of hydrophones and a sophisticated data processing
and communication unit. Advanced signal processing
avoids generation of false alarms and allows
identification of leaks.
The ALD has a built in self diagnostic system and
a rugged design that imposes minimum restrictions
to the installation operation.
wide area COVERAGE
The ALD provides leak detection within
a radius of up to 500 meters from the
sensor. Typically one ALD is used for a 4
slot template.
No MAINTENANCE Requirement
No maintenance is required during the
25 year design life of the ALD. Functional testing is recommended every
second year.
Left: Graphical User Interface, FMC Pazflor project,
with simulated leak detected in red sector.
Below: ALD installed on the roof of a Template
SPECIFICATIONS
Detection capability
• Hydrocarbons (gas and liquid)
• Hydraulic fluid
• MEG
• Produced water
• Redundant sensor options
Size and weight
• Diameter 1 m
Acoustic Leak Detector (ALD).
• Height 1.75 m
• Weight 200 – 250 kg in air
Material
• Titanium
• Galvanic insulated from CP-system
Qualification
• ISO 13628-6
• Operational depth 2 000 meters
• Design life 25 years
Communication
• Ethernet TCP/IP
• Modbus/TCP
Hydrophones qualified for 25 years operation.
• Modbus RS-422 (IWIS)
• Modbus RTU RS-485
• CAN-bus RS-232/RS-422
• Dual (redundant) options
Power
• 18 V DC to 30 V DC, 20 W
• ODI or Tronic wet mateable connector
• Dual (redundant) options
Accessories
• Docking base
• Simulator
• Topside service computer
Subsea data processing module.
We focus on robust sensor design and non-intrusive
technology. This minimizes interference with the subsea
system being monitored and does not impose any increase
in failure modes. The monitoring systems are qualified
for 25 years operation and no periodic maintenance
is required. Our products are easily deployed and
recovered by ROV.
Several contract awards have confirmed our worldleading position with regard to technology and quality.
www.naxys.no
Naxys AS
Hegrenesveien 42
5042 BERGEN
T: + 47 55 36 48 80
E: naxys-sales@naxys.no
NS-EN ISO 9001:2008
Design by maritimecolours.no
Naxys supplies the oil and gas industry with
high-tech. leak & condition monitoring systems
for subsea installations.