Resistivity tools with collocated antennas

Resistivity tools with load-bearing azimuthally sensitive...

Retrievable, formation resistivity tool, having a slotted...

Robust inversion systems and methods for azimuthally...

Sealed modular downhole antenna

Secondary field dielectric constant and/or resistivity well logg

Selectable tap induction coil

Sensor for detecting the magnetic field in the area of...

Sensor in bit for measuring formation properties while drilling

Sensor in bit for measuring formation properties while drilling

Shield tunneling system capable of electromagnetically detecting

Shielded induction sensor for well logging

Shielding apparatus for selective attenuation of an...

Shielding method and apparatus for selective attenuation of...

Shielding method and apparatus using flexible strip

Shielding method and apparatus using transverse slots

Shields for antennas of borehole logging devices

Shields for antennas of borehole logging devices

Signal processing apparatus for frequency domain geophysical ele

Single-switching method of eliminating the effect of electromagn