Logging method and apparatus for measuring earth formation resis
Logging method and apparatus for measuring the Grondingen effect
Logging of cased well by induction logging to plot an induction
Logging system for measuring dielectric properties of fluids in
Logging tool and method for measuring resistivity of different r
Logging tool sonde sleeve
Logging tool with independently energizable transmitters
Logging while drilling apparatus with blade mounted electrode fo
Logging while drilling apparatus with multiple depth of resistiv
Long feature vertical or horizontal electrical conductor detecti
Low battery voltage indicator circuit for a metal detector
Low noise, towed electromagnetic system for subsurface...
Low resistance, fluid replenishing, reference cell and method fo
LWD resistivity device with inner transmitters and outer...