Active Magnetic Azimuthal Toolface for Vertical Borehole Kickoff in Magnetically Perturbed Environments

摘要

An artificial toolface reference system includes a power supply providing current to a ground lead and a reference lead. A ground point is coupled to the ground lead and in electrical connection with the ground. A reference wellbore includes a reference conductor in electrical connection with the ground. The reference conductor is in electrical connection with the reference lead. A guidance sensor positioned outside the reference wellbore includes at least one magnetometer. The power supply may be used to provide a current through the reference conductor, the ground, and the ground point such that a reference magnetic field is generated along the reference conductor. The guidance sensor may measure the reference magnetic field with a magnetometer. An artificial magnetic toolface may be calculated therefrom.

主权项

1. An artificial toolface reference system comprising:
a power supply, the power supply providing current to a ground lead and a reference lead; a ground point, the ground point coupled to the ground lead and in electrical connection with the ground; a reference wellbore, the reference wellbore including a reference conductor in electrical connection with the ground, the reference conductor in electrical connection with the reference lead; and a guidance sensor positioned outside the reference wellbore including at least one magnetometer.