The invention relates to an undercut anchor comprising an anchor shaft and a non-circular, for example triangular, anchor head. A downhole logging tool having a plurality of spaced antennas, at least one of which is a transverse antenna, at least two of which are tilted antennas, and at least two of which are axial antennas is provided. In some embodiments, the process may occur in the presence of moisture. A second printer system is connected to the communication line, and receives the electronic mail via the communication line.