Patent ID: 7414405

Claim:
A borehole imaging tool comprising: a tool body configured for rotating with a drill string in a subterranean borehole; at least one magnetoresistive magnetic field sensor deployed in the tool body, the sensor disposed to measure first and second cross axial components of a magnetic field in the subterranean borehole; an electrical transmission path for conducting electrical power from one longitudinal end of the tool to another longitudinal end thereof, the transmission path including an electrically conductive, non-magnetic tube, the conductive tube deployed in the tool body, the at least one magnetoresistive magnetic field sensor deployed in the conductive tube; and a programmed processor communicatively coupled with the at least one magnetoresistive magnetic field sensor, the programmed processor configured to (i) calculate tool face angles in substantially real time from the cross axial components of the magnetic field, (ii) receive logging while drilling data from a logging while drilling sensor, and (iii) correlate the logging while drilling data and the tool face angles into a set of corresponding data pairs.