Drum track detector
Dual antenna coil transponder system
Dual compensated chlorine logging tool
Dual detector pulsed neutron logging for providing...
Dual focused resistivity logging method and apparatus
Dual guard logging apparatus
Dual loop magnetic excitation for mail tag
Dual scintillation detector, single photomultiplier density...
Dual spaced compensated neutron well logging instrument
Dual spaced epithermal neutron detector porosity logging
Dual spectra well logging system and method
Dynamic acoustic logging using a feedback loop
Dynamic connectivity analysis
Dynamic downhole recorder
Dynamic source parameter selection for seismic vibrator data...