Patent ID: 9540880
Date: 2017-01-10
CPC Classifications: E21B

Claim:
1. A method for intercepting and penetrating a cased subterranean target wellbore, the method comprising: (a) deploying a drill string in a drilling well, the drill string including a drill bit and a magnetic latching tool, the magnetic latching tool including a plurality of permanent magnets deployed on an outer surface of a nonmagnetic tool body, the permanent magnets being circumferentially aligned with one another on the tool body and magnetized in a radial direction, the magnetic latching tool further including a magnetically permeable housing deployed about the plurality of permanent magnets and in contact with the outer surfaces of each of the magnets; (b) drilling the drilling well substantially parallel with and adjacent to the cased target wellbore; (c) rotating the drill string so that the permanent magnets magnetically engage the cased target wellbore; and (d) forming an opening in the cased target wellbore.