Invention Grant
US09588248B2 Earth surveying for improved drilling applications 有权
地球测量改善钻井应用

Earth surveying for improved drilling applications
Abstract:
Methods and apparatuses for geophysical surveying are disclosed. In one embodiment, a marine vehicle may obtain magnetic measurements in a location around a drilling site. The magnetic measurements may be used to calculate a localized disturbance magnetic field resulting from, for example, solar flares. The localized disturbance magnetic field may be used to calculate a declination value and, thus, a wellbore position with improved accuracy.
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