Exemplary embodiments of the invention may improve borehole coverage and data quality and reliability in LWD caliper logging.
The position of the caliper arm (11, 111) determines the radius of the borehole.
The caliper tools may respectively obtain caliper measurements of a wellbore.
In particular, the invention may advantageously reduce or even eliminate blind spots when logging eccentric bore holes.
In one example, a system for obtaining such an integrated caliper includes several caliper tools and data processing circuitry.
The magneto-resistive sensors (24, 102) sense the position of a precise magnetic ruler (94) linked to the caliper arm (11, 111).
Aspects of this invention include a downhole tool and method for making a physical caliper measurement of a subterranean borehole.
The tool is configured to make the physical borehole caliper measurement only when the measured pressure in each of three or more outwardly extendable blades is greater than a predetermined threshold pressure.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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