Patent ID: 8222902
Filing Date: 2012-07-17
Classification: E21B,G01V,H01Q

Abstract:
1. An extension module that comprises: a threaded connector that mechanically couples to a resistivity logging tool having at least one transmitter antenna and at least one receiver antenna, and wherein the threaded connector establishes an electrical signal path with the resistivity logging tool when so coupled; electronics that operate cooperatively with the resistivity logging tool to detect azimuthal variations in formation resistivity, wherein as part of said operating, the electronics apply one or more measurement parameters received via the electrical signal path from the resistivity logging tool; and a tilted receiver antenna to make azimuthally-sensitive measurements in response to operation of said transmitter antenna, wherein the azimuthally-sensitive measurements comprise at least one of phase shift and attenuation between the tilted receiver antenna and a reference signal.