Borehole Geophysics – Logging While Pulling‚ design concepts for seabed mining and sea bed drilling.
One of the Bluebird Geoscience founders (Adrian Digby) has spent 30 years developing borehole geophysical techniques and equipment. Starting in the 1980’s with a patented system that allowed shallow (300m) boreholes to be logged by the drillers at remote locations with data drops on a weekly basis‚ he foresaw the modern development of acquisition and telemeter data to allow in–office monitoring of progress and conditions on site.
These “Driller–Operated Units” led to the concept of other compact portable and multi–purpose logging systems. This included a number of slim–line tools run through the bit and “logging while pulling”. Click to https://www.antares–geo.de/ for details of a range of modern slim–line tools.
Logging through the bit was found to have other advantages and most significantly added a capability to investigate fully the shallow section in offshore developments. The shallow section rarely has quality geophysical data. The climatic changes over the last 1m years means that the variability of sediment properties in all offshore shallow sediments is exceptional in the geological record. Too often‚ limited data are available to ensure cost–effective and safe drilling through the shallow section whereby well stability and the stability of the seabed can be guaranteed. Detailed accurate and cost effective borehole geophysics data from the shallow sections can provide better design solutions for both drilling and developments offshore.
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