Patent ID: 7080699
Filing Date: 2006-07-25
Classification: E21B,F16L,G01V

Abstract:
1. A gap collar for an electromagnetic communication unit of a downhole tool positioned in a wellbore, the downhole tool communicating with a surface unit via an electromagnetic field generated by the electromagnetic communication unit, the gap collar comprising: a first collar having a first end connector; a second collar having a second end connector matingly connectable to the first end connector; a non-conductive insulation coating disposed on one of the first end connector, the second end connector and combinations thereof, the insulation coating defining a gap to electrically insulate the first and second end connectors; and a non-conductive insulation molding extending across the gap about one of an inner surface of the collars, an outer surface of the collars and combinations thereof, the insulation moldingly conforming to the shape thereof.