Patent ID: 7931081

Claim:
A system for monitoring a location of a borehole for production of petroleum from an earth formation, the system comprising: an assembly including at least one of an injection conduit for injecting a thermal source into the formation and a production conduit for recovering material including the petroleum from the formation; a guide conduit attached to at least a portion of the at least one of the injection conduit and the production conduit, the guide conduit extending in a direction at least substantially parallel to the at least one of the injection conduit and the production conduit; and a detection source conduit insertable through the guide conduit and configured to dispose therein a detection source for detecting a location of the assembly in the formation, the detection source including an elongated electrically conductive member extendable along at least a portion of the detection source conduit, at least one portion of the elongated member including an electrosensitive material, the electrosensitive material reactive to an electric current to change shape in response to the electric current to form an electromagnet at the portion.