Multifrequency dielectric logging tool including antenna system

Details Multifrequency dielectric logging tool including antenna system Multifrequency dielectric logging tool including antenna system

1991-11-07

1993-08-03

Envall, Jr., Roy N.

Boots, shoes, and leggings

324339, 324338, G01V 338, G01V 318

Patent

active

052335224

ABSTRACT:
An apparatus for induction logging is disclosed. By transmitting a sequence of pulses at many frequencies, the formation invaded zone diameter can be distinguished as a result of changes in resistivity. As higher frequencies are swept, dielectric constant varies with frequency and this variation is evident in chart form. An apparatus for controlled antenna field formation is also disclosed including a sonde construction involving antenna coils on the sonde with dielectric discs to reduce parasitic radiation.

REFERENCES:
patent: 3891916 (1975-06-01), Meador
patent: 4009434 (1977-02-01), McKinlay
patent: 4511843 (1985-04-01), Thoraval
patent: 4651101 (1987-03-01), Barber

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