Patent ID: 7525315

Claim:
A resistivity logging tool, comprising: a propagation or induction resistivity antenna disposed on an elongated tubular having a longitudinal axis and adapted for subsurface disposal; a recess in an outer wall of the tubular and extending circumferentially about the longitudinal axis of the tubular, wherein the recess recedes from a first edge at the outer wall of the tubular and from a second edge at the outer wall of the tubular, the first edge being spaced longitudinally across the recess from the second edge; a lateral resistivity sensor disposed in the recess in the elongated tubular; a shield disposed on and about the outer wall of the tubular and extending across the recess to cover the recess and the lateral resistivity sensor, and an insulating mechanism including a circumferential gap, the circumferential gap being located separately from the recess and extending continuously about the tubular to prevent electric current flow in the shield in a direction parallel to the longitudinal axis of the tubular near the lateral resistivity sensor.