WELLBORE COMMUNICATION SYSTEM

摘要

A gap collar for an electromagnetic communication unit of a downhole to ol positioned in a wellbore is provided. The downhole tool communicates with a surface unit via an electromagnetic field generated by the electromagnetic communication unit. The gap collar includes a first collar having a first end connector and a second collar having a second end connector matingly connectable to the first end connector. The gap colla r further includes a non-conductive insulation coating disposed on the first and/or second end connectors, and a non-conductive insulation molding positioned about an inne r and/or outer surface of the collars. The insulation molding moldingly conforms to the sha pe collars. The connectors are provided with mated threads modified to receive the insulatio n coating. Measurements taken by the downhole tool may be stored in memory, and transmitted to the surface unit via the electromagnetic field.