In Subsea leak detection

ALD-Acoustic Leak Detector Inspection technique: AUV

Specifications

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The Acoustic Leak Detector  AUV mode has been designed to be installed into and autonomous unmmaned  vehicle.

It is a stand alone version able to record the data to be post processed after the inspection using teh standrd ALD software. Data are also subject to a light processing in real time calculating a leak proabability index.

Features

In this configuration ALD equipment includes an acoustic sensor to be fixed to vehicle shell and a POD to be integrated in the vehicle payload. Data are acquired and recorded during the run. A partial data  analysis is done in real time while the complete processing will take place after vehicle  recovery.

Technical specifications

SENSOR

  • dimensions: to be fitted to the AUV payload  
  • weight in sea water: 0,0 kg
  • frequency range: from 1 to150 kHz  
  • acoustic sensitivity: -165dB re 1V/uPa
  • max operating depth 3000 m

POD

  • dimensions: 260 by 108 mm
  • weight in air: 5 kg
  • weight in sea water: 1 kg
  • Power supply voltage 12 to 30 Vdc
  • Current @24Vdc <400 mA
  • max operating depth 3000 m

Accessories and optional configurations

In this configuration the following optional sensor can be installed: bubble detector, methane detector, dye detector, crude oil detector.

ALD® acoustic leak detector is a patented technology of CO.L.MAR., which has benefited from the development of submarine inspection techniques and from the constant updating of equipment, in order to always work with cutting-edge tools and instruments. The ALD® service, including equipment and operators is supplied to promptly detect existing subsea leaks or, during pressure test of subsea installations, to guarantee an immediate inspection in case of pressure loss. ALD is an essential tool for pipeline integrity inspection and generally for IRM (inspection repair maintenance) activities.

Features

EFFECTIVENESS: NOT AFFECTED BY CURRENT, TURBIDITY, VISIBILITY, AMBIENT NOISE

SENSITIVITY: DETECTED LEAKS AS SMALL AS 0,04 LT/MIN

RELIABILITY: 100% OF SUCCESS AFTER 21 YEARS ON THE FIELD

EXPERIENCE: 21 YEARS OPERATIONS, OVER 90 OFFSHORE PROJECTS AND OVER 50 SUBSEA LEAKS

QUALIFICATION: DNV-GL QUALIFIED TECHNOLOGY

RAPIDITY: FAST WORLDWIDE MOBILIZATION

NO NEED TO STOP PRODUCTION;

HAS DETECTED LEAKS ON BUIRED PIPELINES, FLANGES, RISERS, UMBILICAL, VALVES, GAS LEAK, OIL LEAK , WATER LEAK

Technical specifications

The system is mainly composed by an underwater acoustic sensor, a POD (underwater electronic unit), a transmission line, a receiving unit and a PC based processing and display software. The sensor and the transmission line are different depending on the inspection techniques while the other components are common to all applications: while the sensor is driven along the pipeline or positioned close to a flange or connection, the receiver puts the operator in condition of identifying an eventual leak signal.

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Product sheet – ALD

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