Systems and methods for guiding the drilling of a horizontal...

Details Systems and methods for guiding the drilling of a horizontal... Systems and methods for guiding the drilling of a horizontal...

E - Fixed Constructions

21

B

E21B 47/0232 (2012.01) E21B 7/08 (2006.01)

Patent

CA 2689819

System and methods for guiding the drilling of a horizontal well (110) are disclosed. A current is provided in at least one conductor (140) positioned in a target vertical well (105). A magnetic field generated by the current is measured at a drilling assembly (120) that is drilling the horizontal well (110). A direction from the drilling assembly (120) to the target vertical well (105) is determined based at least in part on the measured magnetic field. A distance from the drilling assembly (120) to the target vertical well (105) is determined based at least in part on the measured magnetic field. The determination of the distance includes determining at least one gradient.

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