Sonardyne UK (Head Office) T. +44 (0) 1252 872288 F. +44 (0) 1252 876100 E. [email protected] www.sonardyne.com Datasheet Subsea Acoustic Data Logger System Description Key Features Sonardyne's new generation of Subsea Acoustic Data Logger System uses a spread spectrum, high speed acoustic link to allow large volumes of logged data to be rapidly and accurately retrieved at the surface. • Designed for ROV deployment and retrieval When combined with the feature of ROV portability, the system is the ideal solution for initial well appraisal, where frequent downhole pressure and temperature readings need to be logged over a period of a few weeks. However, the new system is equally suitable for longterm deployments where it may remain installed on a wellhead, logging data for several years without intervention. The latest system is ideal for initial well appraisal and can easily be moved between wells by ROV. It uses a high speed acoustic data link for rapid retrieval of the large volumes of downhole data often associated with well appraisal activities. As such, the subsea unit can be interfaced to all industry standard downhole gauges whilst custom interfaces can be supplied on request. • Easily moved between wells • High speed, spread spectrum acoustic data link • Interfaces to all industry standard gauges • Depth rated to over 10,000 feet (3,000 Metres) • Fully adjustable data logging rate • Long-life seabed deployment Sonardyne UK (Head Office) T. +44 (0) 1252 872288 F. +44 (0) 1252 876100 E. [email protected] www.sonardyne.com Specifications Subsea Acoustic Data Logger System Feature Depth Rating Operating Frequency Transducer Beamshape Transmit Source Level (dB re 1µPa @ 1m) Type 8057 3,000 Metres LF (14–19kHz) ±90º (Shallow) ±30º (Deep) 192dB (Shallow) 202dB (Deep) <100 dB Long Life Lithium Receiver Threshold(dB re 1µPa) Power Typical Battery Life (assuming 3 guages) At a reading rate of: 1 reading every 10 minutes 230 days 1 reading every hour 2.5 years 1 reading every day 5 years Acoustic Data Link High Speed, Spread Spectrum Acoustic Data Transmission Rate 600 Baud (True payload rate- raw data rate is 1200 Baud) Data Storage Capacity 8Mb Standard (Expandable to 16Mb) External Interfaces Analogue or 1x Gauge √F Serial 1x Serial Port External connectors ROV Mateable Battery Storage 14.5 V ROV Transportable Yes Mechanical Construction Super Duplex Stainless Steel Weight in Air 70kg Weight in Water 50kg Note 1. The standard 8Mb capacity represents more than 3 years of data storage, at one reading (of 3 gauges) every 10 minutes. For virtually all practical applications, there will be substantial memory capacity left unused at the end of the deployment, as the memory usage life will typically exceed the life of the internal battery pack. Specifications subject to change without notice - 10/2006