Patent ID: 7193420

Claim:
A method for resistivity logging including reduced borehole current effects using a logging tool disposed in a borehole, wherein the logging tool includes an inner conductive mandrel at least partially surrounded by an outer sleeve, includiug at least one surface electrode and at least one antenna having a magnetic dipole, the method comprising: providing a first conductor on an outer surface of the sleeve exposed to the exterior of the well logging tool, and at least one second conductor positioned about the inner conductive mandrel in conductive connection therewith and conductively connected to the first conductor and exposed to an inner surface of the sleeve; transmitting an electromagnetic energy from a transmitter antenna on the logging tool into a formation; providing a current path allowing currents in the borehole to flow through at least one radially conductive path between the inner conductive mandrel and the outer surface of the sleeve, the radially conductive path including the first conductor, the second conductor, and the inner conductive mandrel; sealing at least one of the first conductor or the second conductor with the sleeve to prevent passage of fluid Through the sleeve; and measuring an induced signal in a receiver antenna on the logging tool.