Table T2. Vertical resolution and depth of investigation of resistivity-at-the-bit (RAB) measurements.
 
RAB measurement
Vertical
Resolution
(in)
Depth of
investigation
(in)
Button Shallow focused
Medium focused
Deep focused		 2-3
2-3
2-3		 1
3
5
Ring
2-3 7
Bit
12-24 12