Insulating segment for a drill string electrode structure

Details Insulating segment for a drill string electrode structure Insulating segment for a drill string electrode structure

1982-11-12

1986-10-21

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

Using electrode arrays, circuits, structure, or supports

73152, 175 50, 324369, G01V 320, E21B 4900

Patent

active

046188282

ABSTRACT:
An insulating segment for a drill string electrode structure is presented. The insulating segment of the drill string includes a drill string segment having a recess along an axial length thereof with a first sleeve of insulating material in the recess on the recessed surface of the drill string segment and a second sleeve of insulating material on the first sleeve of insulating material. The first end second sleeves of insulating material are of different hardnesses, with the second sleeve being harder than the first sleeve. A plurality of electrode are embedded in the second sleeve.

REFERENCES:
patent: 3072843 (1963-01-01), Clements et al.
patent: 3124742 (1964-03-01), Schneider
patent: 3268801 (1966-08-01), Clements et al.
patent: 4286217 (1981-08-01), Planche et al.
patent: 4356629 (1982-11-01), Jeter et al.
patent: 4461997 (1984-07-01), Ohmer

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