Well logging apparatus having a removable sleeve for sealing and

Details Well logging apparatus having a removable sleeve for sealing and Well logging apparatus having a removable sleeve for sealing and

1994-06-14

1996-10-08

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

7315202, 175 50, 324338, 324369, G01V 318, G01V 328, F21B 4900

Patent

active

055635121

ABSTRACT:
A well logging apparatus is disclosed having an elongate body supporting a plurality of antenna coils housed in recesses formed on the body. A sleeve covers the segment of the body containing the antenna recesses and seals the antennas from borehole fluids. Electronics compartments formed in the body for housing signal conditioning circuitry are likewise sealed by the sleeve. The sleeve includes slotted regions filled with a sealant, the slotted regions being disposed about the antenna coils and providing an electromagnetically transparent window through the sleeve.

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Coope, Dan, et al., "The Theory of 2 MHz Resistivity Tool and its Application to Measurement-While-Drilling," The Log Analyst , pp. 35-46 (May-Jun. 1984).

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