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U.S. Department of Energy
Office of Scientific and Technical Information

Formation volumetric evaluation while drilling

Patent ·
OSTI ID:6777886
This patent describes a method for investigating properties of subsurface formations traversed by a borehole. It comprises: deriving a drilling signal indicative of the resistance of the formation to being drilled by a drill bit; deriving additional signals indicative of formation properties; and in response to the drilling signal and to the additional signals, deriving a volumetric analysis of the subsurface formation.
Assignee:
Anadrill, Inc., Sugar Land, TX (USA)
Patent Number(s):
A; US 4949575
Application Number:
PPN: US s 7-316256
OSTI ID:
6777886
Country of Publication:
United States
Language:
English