Electromagnetic and magnetostatic shield to perform...

Details Electromagnetic and magnetostatic shield to perform... Electromagnetic and magnetostatic shield to perform...

G - Physics

01

V

G01V 3/26 (2006.01) E21B 49/00 (2006.01) G01V 3/28 (2006.01)

Patent

CA 2588496

A transmitter on a bottomhole assembly (BHA) is used for generating a transient electromagnetic signal in an earth formation. A receiver on the BHA receives signals that are indicative of formation resistivity and distances to bed boundaries. A combination of electromagnetic shielding and magnetostatic shielding enables determination of distance to an interface ahead of the drillbit.

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