THE DESIGN OF DRILLING PARAMETER MEASUREMENT SYSTEM
Jie Zhang · Journal of Southwest Petroleum University · 2010
A drilling data acquisition system which can measure the near-bit drilling parameters such as:WOB,torque,lateral force and annular pressure etc is designed.Pressure transducer is used to obtain annular pressure.WOB,torque and lateral force are measured by four strain-gauge electric bridges.In the DAS system,advanced MCU and suitable A/D converter with modules of signal amplification,data storage,data transfer and peripheral circuits are adopted to fit the system.The good results of experiment on well Wenxing 5 show that the system can meet the working conditions of actual drilling.The system can present a clear near-bit work situation which provides a very intuitive way of analyzing the actual work of the downhole drilling to improve drilling and can reduce and eliminate the underground complexities and incidents,shorten the drilling time and increase drilling speed.