Patent ID: 7391216
Filing Date: 2008-06-24
Classification: E21B,G01V

Abstract:
1. In a system for locating an in-ground cable in a region using a locating signal which is transmitted from the length of the cable, a method for determining the depth of the cable using a locator, said method comprising the steps of: at a first point with reference to the surface of the ground, defining a generally horizontal locating direction toward a second point; measuring a first intensity of the cable locating signal at the first point with the locator oriented toward the second point along said locating direction; moving the locator to the second point; measuring a second intensity of the cable locating signal at the second point; determining a distance between the first and second points along said locating direction; and using the measured first and second intensities and the determined distance between the first and second points, determining the depth of the cable.