G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 3/30 (2006.01)
Patent
CA 2683987
An antenna (3) of an electromagnetic probe used in investigation of geological formations GF surrounding a borehole WBH comprises a conductive base (31) and an antenna element (32). The conductive base (31) comprises an opened non-resonant cavity (33). The antenna element (32) is embedded in the cavity (33) and goes right through the cavity. The antenna element (32) is isolated from the conductive base (31). The antenna element (32) is coupled to at least one electronic module via a first 34A and a second 34B port, respectively. The electronic module operates the antenna so as to define a simultaneously superposed pure magnetic dipole and pure electric dipole.
Antenne (3) d'une sonde électromagnétique utilisée dans l'étude des formations géologiques (GF) entourant un forage (WBH), comprenant une embase conductrice (31) et un élément d'antenne (32). L'embase conductrice (31) comprend une cavité non résonante ouverte (33). L'élément d'antenne (32) est encastré dans la cavité (33) et traverse celle-ci de part en part. L'élément d'antenne (32) est isolé de l'embase conductrice (31). L'élément d'antenne (32) est relié à au moins un module électronique par l'intermédiaire d'un premier (34A) et d'un second port (34B), respectivement. Le module électronique commande l'antenne de manière à définir un dipôle magnétique pur et un dipôle électrique pur simultanément superposés.
Schlumberger Canada Limited
Smart & Biggar
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