Patent ID: 6989764

Claim:
A method for communicating between downhole tools and equipment in a wellbore, comprising the steps of: (a) providing a first downhole structure adapted to operate in a first fluid having a first fluid density, said first structure having one or more non-acoustic transmitter units and one or more non-acoustic receiver units; (b) providing a second downhole structure adapted to operate in a second fluid having a second fluid density, said second structure having one or more non-acoustic transmitter units and one or more non-acoustic receiver units; (c) receiving a signal from the one or more non-acoustic transmitter units of the first downhole structure with the one or more non-acoustic receiver units of the second downhole structure; and (d) receiving a signal from the one or more non-acoustic transmitter units of the second downhole structure with the one or more non-acoustic receiver units of the first downhole structure.