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1. WO1995031736 - ELECTROMAGNETIC PROPAGATION TOOL USING MAGNETIC DIPOLE ANTENNAS

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Publication Number WO/1995/031736
Publication Date 23.11.1995
International Application No. PCT/US1995/005780
International Filing Date 11.05.1995
Chapter 2 Demand Filed 11.12.1995
IPC
G01V 3/30 2006.1
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
3Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation
18specially adapted for well-logging
30operating with electromagnetic waves
CPC
G01V 3/30
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
3Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
18specially adapted for well-logging
30operating with electromagnetic waves
Applicants
  • BAKER HUGHES INCORPORATED [US]/[US]
Inventors
  • WU, Jian-Qun
Agents
  • ROWOLD, Carl, A.
  • DAVIES, Christopher, R.
Priority Data
08/241,65912.05.1994US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) ELECTROMAGNETIC PROPAGATION TOOL USING MAGNETIC DIPOLE ANTENNAS
(FR) INSTRUMENT DE PROPAGATION ELECTROMAGNETIQUE A ANTENNES DIPOLES MAGNETIQUES
Abstract
(EN) An electromagnetic propagation tool using magnetic dipole antennas comprising small current loops having characteristics of a point dipole is presented. The electromagnetic tool comprises a drill collar segment having at least one dipole antenna for each transmitter and/or receiver antenna. The dipole antennas are disposed within pockets formed in the drill collar segment.
(FR) L'invention se rapporte à un instrument de propagation électromagnétique composé d'antennes dipôles magnétiques comprenant de petites boucles de courant et possédant les caractéristiques d'un dipôle ponctuel. L'instrument électromagnétique comprend un segment annulaire de forage possédant au moins une antenne dipôle pour chaque antenne émettrice et/ou réceptrice. Les antennes dipôles sont placées dans des poches formées dans le segment annulaire de forage.
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