Dual-cone double-helical downhole logging device

Details Dual-cone double-helical downhole logging device Dual-cone double-helical downhole logging device

1982-01-20

1984-12-18

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

343895, G01V 330, H01Q 136

Patent

active

044892764

ABSTRACT:
A broadband downhole logging device includes a double-helix coil wrapped over a dielectric support and surrounded by a dielectric shield. The device may also include a second coil longitudinally aligned with a first coil and enclosed within the same shield for measuring magnetic permeability of downhole formations and six additional coils for accurately determining downhole parameters.

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patent: 4107598 (1978-08-01), Meador
patent: 4130793 (1978-12-01), Bridges
patent: 4278941 (1981-06-01), Freeman

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