Title:
A METHOD AND APPARATUS FOR A MULTI-COMPONENT INDUCTION INSTRUMENTMEASURING SYSTEM
Document Type and Number:
WIPO Patent Application WO2003025342
Kind Code:
A9
Abstract:
An improved induction tool for formation resistivity evaluations. The tool provides electromagnetic transmitters and sensors suitable fior transmitting and receiving magnetic fiels in radial directions that are orthogonal to the tool's longitudinal axis with minimal susceptibility to errors associated with parasitic eddy currents induced in the metal components surrounding the transmitter and receiver coils. The present invention provides increased effective tool surface impedance by increasing self-inductance of the paths in which induced eddy currents flow on the surface of the multi-component induction instruments. The tool enables downhole tool designers to build more effective and better-protected radial induction arrays for existing and future downhole instruments operating in the frequency and/or time domains.
Inventors:
FANINI OTTO
FORGANG STANISLAV W
MERCHANT GULAMABBAS A
KRIEGSHAUSER BERTHOLD
YU LIMING
FORGANG STANISLAV W
MERCHANT GULAMABBAS A
KRIEGSHAUSER BERTHOLD
YU LIMING
Application Number:
PCT/US2002/024781
Publication Date:
March 04, 2004
Filing Date:
August 05, 2002
Export Citation:
Assignee:
BAKER HUGHES INC (US)
International Classes:
G01V3/28; (IPC1-7): G01V3/28
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