Antech introduces vibration analysis board
Posted: 26 January 2005
New Downhole Vibration Monitoring System First to Offer Live Data Analysis and Transmission Capabilities
AnTech Ltd, a specialist engineering design and manufacturing company serving the international upstream oil and gas industries, today announced the new Vibration Analysis Board (VAB), a system that measures the vibration of drilling tools downhole while drilling.
The VAB is the first-of-its-kind to offer drilling engineers the opportunity to analyse live data and transmit a full set of measurements to surface as drilling is taking place. Data is monitored over three dimensions, in addition to torsional vibration. By making this possible, risk assessment can be easily and efficiently carried out on the drilling tool, allowing appropriate remedial action to be taken which results in dramatically reducing potential damage to the drilling tool.
Full Range of Critical Vibration Measurements Relayed to Surface
To offer the full range of measurements relevant to vibration, the four-channel VAB was developed with several innovative features. It utilises CAN bus, flexible analysis range settings in real-time, high precision accelerometers and a Texas Instruments digital signal processor to carry out accurate measurements.
Vibrations up to 250g from 1Hz to 2.5KHz are measured. In addition, the system performs a Fourier analysis of the data downhole, and condenses the data in preparation for sending to the surface. Also in order to further reduce traffic on the communications bus, the up-hole control software allows the user to specify the range and resolution of the results, as well as how often results are to be gathered and transmitted.
Although the VAB was originally designed for the COLT, AnTech’s electrically controlled coiled tubing drilling bottom hole assembly, it can be easily incorporated to operate in conjunction with other systems, including memory tools, perforating strings and pip expansion systems.
The VAB measures vibration using up to four accelerometers. This allows for measurement of the x, y and z motions, as well as monitoring the torsional vibration as a completely separate motion. Once this data is gathered, it is relayed to the surface via the CAN bus communication interface.
Posted by Editor Pipeline Magazine
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