A method and apparatus for measuring formation characteristics as a function of angular distance segments about the borehole is disclosed. The measurement apparatus includes a logging while drilling tool which turns in the borehole while drilling. Such characteristics as bulk density, photoelectric effect...http://www.google.fr/patents/US5473158?utm_source=gb-gplus-shareBrevet US5473158 - Logging while drilling method and apparatus for measuring formation characteristics as a function of angular position within a borehole
Logging while drilling method and apparatus for measuring formation ...
