Logging subsurface formations for porosity

Logging technique for assaying for uranium in earth formations

Logging tool for measuring the macroscopic thermal neutron captu

Logging tool with a parasitic radiation shield and method of...

Logging tool with response invariant to changes in borehole...

Logging type subsidence detector

Logging while drilling method and apparatus for measuring format

Logging-while-drilling optical apparatus

Long life oil well logging assembly

Low-cost but accurate radioactive logging for determining gas sa

Low-cost but accurate radioactive logging for determining water

Low-noise method for performing downhole well logging using gamm

Lutetium orthosilicate single crystal scintillator detector

Means for measuring radon gas in the soil

Measurement flow section for oil well effluents and system...

Measurement of formation gas pressure in cased wellbores...

Measurement of formation gas pressure in cased wellbores...

Measurement of formation gas saturation in cased wellbores...

Measurement of formation gas saturation in cased wellbores...

Measurement of formation porosity using fast neutron spectroscop