MULTIPOLE ANTENNAE FOR LOGGING-WHILE-DRILLING RESISTIVITY MEASUREMENTS

摘要

One kind is for carrying out the multi-pole antennas of well logging (LWD), and including the line for one of generating and receiving electromagnetic field, which has at least one winding, for providing the magnetic moment opposite with the magnetic moment of the 2nd po in the first part of antenna. The effect of antenna. Provide a kind of method for constructing multi-pole antennas. Additionally provide a kind of LWD tool using the antenna.