Electrically insulating gap subassembly for downhole electromagn

Details Electrically insulating gap subassembly for downhole electromagn Electrically insulating gap subassembly for downhole electromagn

1998-03-05

2000-08-08

Lillis, Eileen Dunn

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

1753254, 1753255, 1662426, 166380, 285 47, 285 48, 285398, E21B 1702

Patent

active

060987278

ABSTRACT:
An electrically insulating gap subassembly for inclusion in a pipe string (30) comprising a pair of tubular members (90, 98) having an electrically insulating isolation subassembly (94) threadably disposed therebetween is disclosed. The electrically insulating isolation subassembly (94) has an anodized aluminum surface that provides electrical isolation to interrupt electrical contact between the two tubular members (90, 98) such that electromagnetic waves (46, 54) carrying information may be generated thereacross.

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