Exclusion of alpha particles from thoron in uranium detection

Externally mounted radioactivity detector for MWD

Externally mounted radioactivity detector for MWD employing radi

Fiber optic tomographic imaging of borehole fluids

Fiber optic well logging means and method

Field method for detecting deposits containing uranium and thori

Field method for detecting deposits containing uranium and thori

Field method for detecting deposits containing uranium or thoriu

Flowshot technique

Flowshot technique

Fluid density monitor

Fluorescence sensing apparatus for determining presence of nativ

Focal plane infrared readout circuit with automatic...

Focused detection logging technique

Focused nuclear interface survey instrument and method of determ

Force and acceleration sensor using four wave mixing technique

Formation density logging MWD apparatus

Formation density logging using multiple detectors and sources

Formation density logging while drilling

Formation density measurement apparatus and method