RANGING MEASUREMENT APPARATUS, METHODS, AND SYSTEMS

摘要

Disclosed embodiments include well ranging apparatus, systems, and methods which operate to detect and determine a relative distance and/or azimuthal direction of nearby target well conductors such as pipes, well casing, etc., from within a borehole of a drilling well.

主权项

1. A method comprising:
rotating an electromagnetic signal receiver in a first borehole; and during the rotating, receiving an electromagnetic ranging signal at the electromagnetic signal receiver, wherein the electromagnetic ranging signal originates from the first borehole or a second borehole and has an excitation frequency determined by a null in an Earth electromagnetic signal spectrum associated with a signal induced by the rotating within a magnetic field of the Earth.