基于井下参数测量的钻柱运动特征及异常状态分析方法OA

With the development of oil exploration and development,the underground geological structure is becoming more and more complex,and the working environment such as the downhole drill string/bit is worse.How to make accurate and timely judgment of the complex downhole conditions is one of the main problems in the drilling process.Traditional surface logging methods are unable to meet the safety drilling needs of complex wells such as ultra deep wells due to the fact that the measured data is not real data from the bottom of the well and the timeliness of data transmission.For this purpose,an underground engineering parameter measuring instrument has been developed,which can achieve accurate measurement,collection,and storage of engineering parameters such as downhole drilling pressure,torque,vibration,pipe pressure,annular pressure,temperature,etc.It has the characteristics of high collection frequency,large storage ca-pacity,and high safety factor.It can obtain real engineering parameters near the drill bit underground,opti-mize the design of acceleration tools,diagnose complex underground working conditions.Besides,it pro-vides technical support for the diagnosis of downhole complex working conditions and the formulation of opti-mal drilling program.Through the analysis and verification of the field test data,it shows that the data measured by the instrument are consistent with the actual field conditions and the downhole conditions.