井下安全监控系统设计与实现

Design and Implementation of a Downhole Safety Monitoring System

针对目前国内井下故障频发,而预警效率低、安全监测技术较为滞后的问题,设计研制了一种具有自主知识产权的井下安全监控系统。该系统可以直接测量近钻头力学参数和工程参数,利用钻井液脉冲将所测参数实时传输至钻井风险分析评估模块,该模块通过分析计算接收到的数据判断钻井风险类型,并评估风险等级。现场试验表明,井下安全监控系统功能完善、性能稳定,风险评估准确率大于95%,部分技术指标达到了国外同类监测系统的水平。研究表明,井下安全监控系统可以降低深部复杂地层钻井风险和钻井成本、解决深部复杂地层井下故障预警效率低等问题,可以产生较大的经济效益。

In order to solve the problems of frequent downhole safety accidents,low early-warning efficiency,lagging safety monitoring technology in China,a downhole safety monitoring system with independent intellectual property rights was designed and developed.This system directly measures near-bit mechanical parameters and engineering parameters,and transmits the measured parameters to the drilling risk analysis and assessment module in real time by using the drilling fluid pulse,by which the received data can be analyzed and calculated to determine the type of drilling risk and assess the risk level.Field tests confirmed that the downhole safety system is fully functional and has a stable performance.The accuracy rate of the risk assessment is higher than 95%,and some technical indexes have reached the level of similar monitoring system abroad.The research show that the downhole safety monitoring system could reduce the drilling risk and drilling cost in deep complex formations.It could create great economic benefits for it has solved the problem of low early warning efficiency of downhole safety accidents.