Patent ID: 7750808
Filing Date: 2010-07-06
Classification: E21B

Abstract:
1. A drillstring communication system, comprising: a drillpipe comprising one or more joints, where the drillpipe is at least partially disposed in a drilling fluid; at lest one data retrieval tag in the drilling fluid, the at least one data retrieval tag comprising: an insulator substrate; at least one analog memory cell disposed on the insulator substrate, the at least one analog memory cell having an input and an output; a receiver having an output, where the receiver output is coupled to the analog memory input; and an antenna coupled to the analog memory output; and at least one communication node disposed along the drillpipe, the at least one communication nodes comprising: a node transmitter to transmit a first signal to the at least one data retrieval tag; and a node receiver to receive a second signal from the at least one data retrieval tag.