Patent ID: 7612565
Filing Date: 2009-11-03
Classification: G01V

Abstract:
1. A modular downhole apparatus to determine a formation property, the apparatus being incorporated into a drill string comprising one or more downhole tools and drill pipe, the drill pipe being of the same or various lengths, the modular downhole apparatus comprising: a first module comprising a first drill collar having one or more antennas mounted thereon or therein, wherein the first module has connectors on both ends and is removeably connected to the drill string; and a second module comprising a second drill collar having one or more antennas mounted thereon or therein, wherein the second module has connectors on both ends and is removeably connected to the drill string; wherein a first dipole moment of one of the one or more antennas of the first module intersects a first module longitudinal axis at a first angle; wherein a second dipole moment of one of the one or more antennas of the second module intersects a second module longitudinal axis at a second angle; and wherein the first and second angles are equal.