控压钻井复合型节流管汇压力控制机制研究  

PRESSURE CONTROL MECHANISM OF COMPOSITE CHOKE MANIFOLD IN MANAGED PRESSURE DRILLING

作　　者：张涛[1,2] 柳贡慧[2] 孟振期[3] 曹友好 郭雪利 

机构地区：[1]中国石油大学.北京 [2]北京信息科技大学 [3]渤海钻探工程技术研究院华北分院 [4]中油国际(土库曼斯坦)勘探开发公司

出　　处：《钻采工艺》2014年第4期36-38,3,共3页Drilling & Production Technology

基　　金：国家重点基础研究发展计划(973计划)项目"深井复杂地层钻井压力系统模型与规律"(2010CB226704);国家自然科学基金"基于模型预测控制理论与状态机架构的控压钻井压力控制方法研究"(51374223);中国博士后科学基金"基于井筒流体介电特性的钻井安全预警可行性研究"(2013M541146)资助

摘　　要：为了提高控压钻井中自动节流管汇对回压的控制精度、响应速度、拓宽对回压的控制范围,增强对钻井液排量的适应能力,提出利用三个节流阀通过串并联组合构成的复合型节流管汇。推导出复合型节流管汇压力调节特性模型,并对压力控制精度、响应速度以及回压控制范围能力进行深入分析。结果表明,复合型节流管汇不仅有效提高回压控制精度、响应速度、回压范围,而且减小节流阀两端压差和排量,一定程度上提高了节流阀的使用寿命。In order to improve the control accuracy,response speed,the control scope of the back pressure of choke manifold in managed pressure drilling( MPD),enhance adaptive capacity to the drilling fluid flow rate,the composite choke manifold by using three throttles series and parallel combination was proposed. The pressure regulation model of composite choke manifold was derived,and pressure control precision,response speed and back pressure control capability of composite choke manifold were analyzed. The results showed that the composite choke manifold not only could improve the back pressure control precision,response speed and back pressure range,but also could reduce the pressure difference and discharge capacity of throttle at both ends,to some extent,it improved the service life of throttle. Finally,the pressure regulation characteristics of composite choke manifold were verified by hydraulic experiment.

关 键 词：控压钻井 节流管汇 串联管路 并联管路 压力控制 

分 类 号：TE92[石油与天然气工程—石油机械设备]