Induction logging sonde with metallic support having a coaxial insulating sleeve member
This patent describes an induction logging sonde adapted to be passed through a borehole for electromagnetically exploring earth formations traversed by the borehole. It comprises: a high strength, electrically conductive, longitudinal support member having a substantially continuous outer surface to favor the flow of eddy currents; an insulating sleeve member coaxial with and supported by the support member; at least one transmitter solenoid coil coaxial with and supported by the sleeve member the coil transmitting at a frequency between about 10-400 KHz for generating an electromagnetic field substantially free from dielectric effects, which field induces currents in the formation and induces the eddy currents circularly around the surface of the longitudinal support member; a first receiver array coaxial and a second receiver array coaxial.
- Assignee:
- Schlumberger Technology Corp., Houston, TX
- Patent Number(s):
- US 4873488
- Application Number:
- PPN: US 6932231A
- OSTI ID:
- 7014769
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
CABLES
COAXIAL CABLES
CONDUCTOR DEVICES
DESIGN
ELECTRIC CABLES
ELECTRIC LOGGING
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATION
EQUIPMENT
EXPLORATORY WELLS
GEOLOGIC DEPOSITS
INDUCTION LOGGING
MINERAL RESOURCES
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
PROBES
RESOURCES
SLEEVES
WELL LOGGING
WELL LOGGING EQUIPMENT
WELLS