Study on Storable Down-hole Drilling String Vibration Testing System

Abstract

Drilling engineering is a high input and risk underground project, which needs the real-time down-hole diagno- sis and forecast technique. Drilling string vibration signals contain full and complex vibration waves, which contains the vibration of the drilling string by itself, the vibration stimulated by the interaction of bit and the formation, the vibration induced by colliding between drill string and bore hole. By adopting drilling string vibration testing system, down-hole vibration can be measured, and use it to the learn and analyze the state of down-hole. Drilling string vibration testing Sys- tem adopts the ADuC841 MCU as the core chip, and uses the high reliability technology to complete the software and hardware design of the testing system. The Storable down-hole drilling string vibration testing system has advantages of small in size, low power consumption, vibration resistance and high temperature resistance. High temperature test, vibra- tion test, laboratory test and spot test show that the down-hole drilling string vibration testing system has the ability to ac- curately record the actual down-hole drill string dynamic vibration status, and system can meet the needs of the drilling site testing.