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Subject: Quadrant System Перевожу документ по направленному бурению, раздел об определении направления ствола скважины. И там идет речь о двух системах или способах: азимут и вот эта quadrant system.Контекст:
In the quadrant system, the directions are expressed as angles from 0 ° - 90 ° measured from North in the two Northern quadrants and from South in the Southern quadrants.
The position of the bottom of the hole is determined by measurement and referenced to a fixed point - usually the Rig Kelly Bushing. Several different survey systems are used to report the direction with the most common being quadrant and azimuth. They are interrelated - simply different methods of reporting the same thing - and the relationship is simple.
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