Patent ID: 9154186
Filing Date: 2015-10-06
Classification: E21B,H04B

Abstract:
1. A system for toolstring communication in cable telemetry, comprising: a surface modem; a downhole toolstring comprising one or more downhole tools; a downhole modem operatively coupled to the downhole toolstring; a cable operatively coupling the surface modem and the downhole modem; a surface data routing module that, upon the system being powered, performs a pre-transmission poll of a data rate requirement for the downhole toolstring and a telemetry type for the downhole modem; a surface computer that calculates an actual data rate for the downhole toolstring during a training phase and compares the actual data rate for the downhole toolstring to the data rate requirement resulting from the pre-transmission poll; when the actual data rate for the downhole toolstring exceeds or matches the data rate requirement resulting from the pre-transmission poll, the surface computer outputs a link up message; and when the data rate requirement resulting from the pre-transmission poll exceeds the actual data rate for the downhole toolstring, the surface computer outputs a link down message.