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VELLVelocity Log (oil industry)
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The survey involved Sub-Atlantic's Tomahawk system performing in deep water using a diverse range of sensors including: a dual-head, multi beam echosounder; a fibre optic gyroscope (FOG); a bathymetric system; a doppler velocity log; hydraulic boom cameras; a pipetracker, wheeled skid; CP with electric actuator; and laser measurement equipment.
Figure 14, an example of composite log example from Granite Wash (Marmaton) section, demonstrates the significant fluid substitution differences between the wet and the gas effect on the seismic P-wave ([V.sub.p]) velocity log for well number A.
Geophysical logging is an important tool for evaluating gas hydrate saturation, and valuable information can be obtained by studying the resistivity and acoustic velocity log data.
The free-running model at Haslar is capable of diving to depths of up to 30m and is bristling with a host of high-tech equipment including 58V lithium-ion batteries, a 2kW propulsion motor, control surface servos, pressure-depth transducers, ring-laser gyroscopes and a Doppler velocity log.
Tenders are invited for Inertial navigation system (ins) with doppler velocity log (dvl) as per specification
The trials took place in the Gulf of Mexico in water depths of 3,057 metres (10,030 ft) and results showed that continuous hovering of the ROV in mid-water beyond Doppler Velocity Log (DVL) range was possible, as well as automatic navigation to waypoints.
Also fitted is an Ixsea Octans Gyro, a Doppler Velocity Log, Sound Velocity Probe and a Digiquartz Depth Sensor.
Teledyne RD Instruments announced that over 30 speakers will be presenting their Acoustic Doppler Current Profiler (ADCP) and Doppler Velocity Log (DVL) research and field work at the company s biennial ADCPs in Action (AiA) Users Conference, scheduled to take place in San Diego, CA, USA, from 29 September to 5 October 2013.
18np003 concerning the acquisition of 4 dopler velocity logs extensions for the 4 existing hand held sonars (belgium-evere: Marine services)
Calculation of Hydraulic Properties from Velocity Logs. The distribution of horizontal hydraulic conductivity along the length of the borehole was obtained directly from flowmeter measurements.
It makes optimal use of acoustic aiding data and other sensors such as Doppler Velocity Logs (DVLs) and pressure sensors to improve accuracy, precision and integrity in any water depth.