E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 47/12 (2006.01) E21B 44/00 (2006.01) G08C 25/00 (2006.01) G01V 1/22 (2006.01) G01V 3/34 (2006.01)
Patent
CA 2509819
The present invention generally provides methods and apparatus for reducing noise in a detected electromagnetic wave used to telemeter data during a wellbore operation. In one embodiment, two surface antennae are placed on opposite sides of the wellbore and at the same distance from the wellbore. The signals from the two antennae are summed to reduce the noise in the electromagnetic signal transmitted from the electromagnetic downhole tool.
Barry Laurence
Hawthorne Hugh
Nero Michael
Villereal Robert
Young Allen
Deeth Williams Wall Llp
Weatherford/lamb Inc.
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