Methods and a system for well logging communication

Abstract

Methods and a system for communication between the well logging surface equipment and downhole tools. A well logging communication system comprised of a surface modem, one or more downhole modems for communication to the surface through one or more signal channels of the wireline. A system with zero, one or multiple downhole tool buses.

What is claimed is: 
     
         1 . A well logging communication system comprising of: a surface modem, one or more downhole tools with or without modem, minimum of one signal channel through the wireline cable between the surface modem and downhole modem(s), and some number of downhole tool buses between the downhole tools. 
     
     
         2 . In the communication system of  claim 1 , wherein the surface modem comprises one downlink encoder, and one or more uplink decoders. 
     
     
         3 . A method for well logging communication, comprising: deploying one surface modem, one or more downhole modems. 
     
     
         4 . In method of  claim 3 , wherein the surface modem and downhole modems are able to deploy different modulations. 
     
     
         5 . In method of  claim 3 , wherein the surface modem and downhole modem(s) time share the signal channel(s). 
     
     
         6 . In method of  claim 3 , wherein the downlink signals contains the information for the surface modem to select the correct parameters for all modules of the decoder with the information including but not limited to: whether it requests uplink signal, and the downhole modem identity. 
     
     
         7 . A method for running tools with multiple tool bus in one string, comprising: deploying at least one tool with embedded modem for each tool bus. 
     
     
         8 . In method of  claim 7 , the tool with modem communicates to the surface via the wireline cable. 
     
     
         9 . In method of  claim 7 , the tool without modem communicates to the surface through the tool with modem in the same tool bus.