Telemetry System, a Pipe and a Method of Transmitting Information

Abstract

The invention relates to a telemetry system for use in a pipe having a wall, comprising a transmitter adapted to generate at least one acoustic wave in a frequency range of about 50-300 kHz, and to inject the acoustic wave in the wall of the pipe, wherein the transmitter is further arranged to binary code information conceived to be transmitted with the acoustic wave. The invention further relates to a pipe comprising the telemetry system, and to a method of transmitting information via a pipe.

1 . A telemetry system for use in a pipe having a wall, comprising
 a transmitter adapted to generate at least one acoustic wave signal in a frequency range of about 50-300 kHz and to inject the acoustic wave signal in the wall of the pipe, the pipe comprising consecutive segments, wherein the transmitter is further configured to binary code information conceived to be transmitted with the acoustic wave signal, the binary code information associated with assigned pairs of frequency values; and   an amplifier for amplifying an incoming signal generated by the transmitter, the amplifier being positioned between the consecutive segments, the amplifier being arranged to implement a consistency check of a received binary code, and generate an amplified frequency shifted output signal which is offset by a pre-determined frequency value with respect to the incoming signal, wherein the offset is conceived to avoid signal interference between the amplified and incoming signal.   
     
     
         2 . The system according to  claim 1 , wherein the pre-determined frequency value is at least 0.1 kHz. 
     
     
         3 . The system according to  claim 1 , wherein the transmitter comprises an array of elements. 
     
     
         4 . The system according to  claim 1 , wherein the transmitter is array-shaped or ring-shaped. 
     
     
         5 . The system according to  claim 1 , wherein the transmitter is adapted to generate a binary code using pre-defined frequencies of a plurality of the acoustic waves. 
     
     
         6 . A pipe comprising the telemetry system according to  claim 1 . 
     
     
         7 . The pipe according to  claim 6 , forming part of a drill arrangement. 
     
     
         8 . A method of transmitting information through a pipe comprising the steps of:
 injecting by a transmitter at least one acoustic wave signal in a frequency range of about 50-300kHz in a wall of the pipe, the pipe comprising consecutive segments having an amplifier positioned between the consecutive segments for amplifying a signal, wherein information conceived to be transmitted with the acoustic wave signal is binary coded;   amplifying an incoming signal generated by the transmitter;   implementing a consistency check of a received binary code; and   generating an amplified frequency shifted output signal which is offset by a pre-determined frequency value with respect to the incoming signal, wherein the offset is conceived to avoid signal interference between the amplified and incoming signal.   
     
     
         9 . The method according to  claim 8 , wherein the pre-determined frequency value is at least 0.1 kHz. 
     
     
         10 . The method according to  claim 8 , wherein the transmitter comprises an array of elements. 
     
     
         11 . The method according to  claim 8 , wherein the transmitter is array-shaped or ring-shaped. 
     
     
         12 . The method according to  claim 8 , wherein for the pipe a drill pipe is used.