Abstract: A system for subsurface measurements in a wellbore, with a first tool including a first plurality of pads to be positioned against a surface of the wellbore, each of the pads having a first plurality of electrodes disposed thereon to emit and receive electric alternating current between the electrodes and a second plurality of electrodes disposed thereon between the first plurality of electrodes to measure an electromagnetic parameter. Also including a second tool including a second plurality of pads to be positioned against a surface of the wellbore, each of the pads having a first plurality of electrodes disposed thereon to emit and receive electric alternating current between the electrodes and a second plurality of electrodes disposed thereon between the first plurality of electrodes to measure an electromagnetic parameter.

Abstract: An Oil Based Mud Imaging (OBMI) sonde adapted to be disposed in a wellbore includes a first imaging tool and at least one additional imaging tool connected to the first imaging tool, the additional imaging tool having a rotational offset and a significant vertical offset with respect to the first imaging tool when the OBMI sonde is disposed in the wellbore. The first imaging tool is connected to the additional imaging tool via a special adapter disposed between the first imaging tool and the additional imaging tool. The bottom of the first imaging tool plugs into one end of the special adapter and the top of the additional imaging tool plugs into the other end of the special adapter.