Invention Grant
US08113041B2 Gravitational method and apparatus for measuring true vertical depth in a borehole 失效
用于测量钻孔中真实垂直深度的重力方法和装置

Gravitational method and apparatus for measuring true vertical depth in a borehole
Abstract:
A method for measuring true vertical depth in a borehole, the method including: measuring gravitational acceleration in the borehole; and determining the true vertical depth from the measurement.
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