An Effective Approach for the Noise Removal of Mud Pulse Telemetry System
Mud pulse telemetry is a method used for Measurement-While-Drilling (MWD) in the oil industry. Information (tool-face orientation, temperature, pressure etc.)which is modulated by means of pulse positioning modulation (PPM) is sent from the bottom of the well to the surface by means of pressure waves in the drilling fluid (the drilling mud). Due to the influence of kinds of noise, the noise removal before decoding is of great importance. Considering the drilling fluid pulses depending on the position and the width of the pulse to transmit the information, after the description of the mud pulse telemetry system and the analysis of the received signal, a new method based on the digital filter to process the signal received from the down-hole to recover the useful signal is applied. The result and the decoding process indicate that all of the pump noise, the reflection noise and other random noise can be wiped off, and the received signal can be recovered effectively and decoded with low error rate.
Digital filter drilling fluid pulse signal processing drilling mud pulse
Zhao Jianhui Wang Liyan Li Fan Liu Yanlei
School of instrument science & opto-electronics engineering,Beihang University,Beijing 100083 China
国际会议
西安
英文
2007-08-16（万方平台首次上网日期，不代表论文的发表时间）