公开(公告)号：EP3004541A4

公开(公告)日：2017-01-18

申请号：EP14804293

申请日：2014-05-21

申请人： SCIENT DRILLING INT INC

发明人： WHITACRE TIM ,  WHITE MATTHEW A ,  VANSTEENWYK BRETT

IPC分类号： E21B47/18

CPC分类号： E21B47/18

摘要： A method of interpreting a signal transmitted through a drilling fluid disposed within a telemetry channel of a wellbore that includes defining a finite number of distinct message signals for representing conditions within the wellbore. The method also includes transmitting one of the message signals through the telemetry channel, and receiving a distorted signal that includes the message signal as distorted by transmission through the telemetry channel. A channel impulse response is estimated and applied to at least one of the message signals to generate at least one predicted signal. A comparison is made between the predicted signal and the distorted signal, and an estimation is made as to which of the finite number of message signals is included in the distorted signal based on the comparison.