Invention Grant
- Patent Title: Magnetic ranging from behind a magnetic shield
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Application No.: US15589560Application Date: 2017-05-08
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Publication No.: US10422198B2Publication Date: 2019-09-24
- Inventor: Douglas Ridgway , Clinton Moss
- Applicant: Scientific Drilling International, Inc.
- Applicant Address: US TX Houston
- Assignee: SCIENTIFIC DRILLING INTERNATIONAL, INC.
- Current Assignee: SCIENTIFIC DRILLING INTERNATIONAL, INC.
- Current Assignee Address: US TX Houston
- Agent Adolf Locklar
- Main IPC: E21B47/09
- IPC: E21B47/09 ; E21B33/12 ; E21B7/04 ; E21B47/022

Abstract:
A method for determining the direction and/or range from a drilling well to a target well may include positioning a magnetic source in the target well and a magnetic sensor in the drilling well. The method may include activating the magnetic source in the target well and moving one or both of the magnetic source and magnetic sensors until a location in which the magnetic sensor is not saturated is identified. The method may include determining the direction and/or range to the target well at that location.
Public/Granted literature
- US20170322013A1 MAGNETIC RANGING FROM BEHIND A MAGNETIC SHIELD Public/Granted day:2017-11-09
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