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 related 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 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. 
     
     
         2 . The system according to  claim 1 , wherein the acoustic wave is a L(0, 2) or T(0, 1) wave. 
     
     
         3 . The system according to  claim 1 , wherein the transmitter comprises an array of elements. 
     
     
         4 . The system according to  claim 3 , wherein the transmitter is ring-shaped. 
     
     
         5 . The system according to  claim 1 , wherein the pipe comprises consecutive segments, the transmitter being adapted to be positioned between the consecutive segments. 
     
     
         6 . 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. 
     
     
         7 . The system according to  claim 1 , wherein the system further comprises an amplifier for amplifying a signal generated by the transmitter, the amplifier being arranged to implement a consistency check of a received binary code. 
     
     
         8 . The system according to  claim 7 , wherein the amplifier is further arranged to generate an amplified frequency shifted signal. 
     
     
         9 . A pipe comprising the telemetry system according to  claim 1 . 
     
     
         10 . The pipe according to  claim 9 , forming part of a drill arrangement. 
     
     
         11 . A method of transmitting information through a pipe comprising the steps of:
 injecting at least one acoustic wave in a frequency range of about 50-300 kHz in a wall of the pipe; wherein information conceived to be transmitted with the acoustic wave is binary coded.   
     
     
         12 . The method according to  claim 11 , wherein for the at least one acoustic wave a L(0, 2) or a T(0, 1) is selected. 
     
     
         13 . The method according to  claim 11 , further comprising the steps of:
 amplifying a signal generated by the transmitter;   implementing a consistency check of a received binary code.   
     
     
         14 . The method according to  claim 13 , further comprising the step of frequency shifting an amplified signal. 
     
     
         15 . The method according to  claim 11 , wherein for the pipe a drill pipe is used.