Measuring and testing – Borehole or drilling – Downhole test
Patent
1988-02-17
1988-12-20
Noland, Tom
Measuring and testing
Borehole or drilling
Downhole test
250265, 367 35, 175 50, E21B 4900, G01N 500
Patent
active
047917970
ABSTRACT:
Two downhole measurement-while-drilling tools, at least one of which is borehole sensitive, are used to make standard measurements of borehole conditions while drilling. From these measurements, and with some prior knowledge of the lithology, the caliber of the borehole is determined by iteration. The preferred tools are a neutron porosity and a density tool with lithology having been determined by prior seismic survey techniques.
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Paske William C.
Rodney Paul F.
Roeder Ray A.
NL Industries Inc.
Noland Tom
Raevis Robert R.
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