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ACTIVE MAGNETIC AZIMUTHAL TOOLFACE FOR VERTICAL BOREHOLE KICKOFF IN MAGNETICALLY PERTURBED ENVIRONMENTS
ACTIVE MAGNETIC AZIMUTHAL TOOLFACE FOR VERTICAL BOREHOLE KICKOFF IN MAGNETICALLY PERTURBED ENVIRONMENTS
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机译:磁扰环境中垂直孔洞启动的主动磁方位角面
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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.
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