Wireless subsea systems assist integrity management

Offshore staff

PERTH, AustraliaWFS Technologies, Focus Subsea, and Aquip Systems will demonstrate the Seatooth wirelessly-enabled products later this week at iTech’s test tank facilities in Wangara, Western Australia.

The control and monitoring systems are designed to increase subsea production and help operators improve asset integrity management and flow assurance.

The Seatooth PipeLogger measures the internal temperature, corrosion, flow, leaks, and vibration of subsea pipelines without the need to physically penetrate the pipe wall. It is said to be simple to install or retrofit, even on pipelines incorporating up to 50 mm (2 in.) of thermal insulation.

Its logger, based on wireless technology, can store 400,000 time stamped readings. This data can then be automatically picked up by positioning a low-cost ROV within 5-10 m (16.4-33 ft) of the sensor. Further cost savings arise through dispensing with subsea jumpers or buried cables.

Seatooth wireless subsea networks support data transmission between subsea nodes spaced up to 35 m (115 ft) apart and communicate wirelessly through the splash zone.

Subsea wireless networks are said to be less expensive to install on offshore structures than conventional cabling. The open architecture allows new sensors to be added, avoiding the cost of installing cabling for each new sensor.

Typically, subsea construction needs equipment to be installed level or in the case of piles, to pass through the seabed vertically. One traditional way of recording angular change is through a 2D “bullseye” level, which requires use of a camera to obtain a clear view of the target face, something that is not always feasible in the sediment-charged waters surrounding subsea operations.

WFS, however, claims its wireless inclinometer can measure small changes of tilt and log this over time.


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SeaTooth PipeLogger

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