Neutron-neutron logging
Neutron-neutron logging for both porosity and macroscopic absorp
Neutron-neutron-logging
Nonfluid-filled borehole logging apparatus
Nuclear density gauge
Nuclear density gauge
Nuclear detector system with reduced dead-time processor circuit
Nuclear imaging probe
Nuclear measuring gauge with automatic detection of source depth
Nuclear well logging with neutron source and separate spaced rad
On-the-go optical spectroscopy soil analyzer
Optical multiphase flowmeter
Optical probe for analysis of formation fluids
Permanent optical sensor downhole fluid analysis systems
Petroleum reservoir flooding method
Petroleum stream analyzer
Photoelectric lithology factor and method of measurement
Photon detector based upon an activated lanthanide beryllate sci
Pileup rejection
Probe device for detecting contaminants in subsurface media