Patent ID: 8008919

Claim:
An apparatus configured to estimate a value of a resistivity property of an earth formation, the apparatus comprising: a tool configured to be conveyed in a borehole; at least one transmitter and at least one receiver on the tool, the at least one transmitter and at least one receiver defining two transmitter-receiver combinations, the at least one transmitter configured to induce a current in the earth formation, the at least one receiver configured to produce a transient signal responsive to the induced current, the transient signal being responsive to a conductive body of the tool; and at least one processor configured to estimate the value of the resistivity property deconvolving a first transient signal corresponding to a first one of the two transmitter-receiver combinations using a second transient signal corresponding to a second one of the two transmitter-receiver combinations, the estimate being substantially unaffected by the conductive body of the tool.