摘要
精细控压钻井是解决窄密度窗口安全钻井问题的新技术之一,其目的是精确控制环空压力剖面,实现井底压力的恒定控制。介绍了自主研发的PCDS-I精细控压钻井系统装备特点、现场试验与应用情况。该系统整体运行稳定、无故障,经受住了现场工况的考验,实现了恒定井底压力控制和微流量控制,钻进过程中,系统回压控制精度达到0.2 MPa,接单根、起下钻过程中,系统回压控制精度达到0.5 MPa。
MPD is a new technology that to resolve the drilling problem of narrow mud weight window,the aim is to precisely control the annulus pressure profile,to achieve a constant bottom-hole pressure.This article describes the development of the PCDS-I Auto-controlled pressure drilling system,equipped with sophisticated features,field tests and application.The overall stable operation,without failure, has withstood the test of site conditions,to achieve a constant well base pressure control,and micro-flow control,into the process system back pressure control accuracy 0.2 MPa,then a single root,from the drilling process control precision of the system back pressure 0.5 MPa.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2011年第6期19-22,共4页
Oil Drilling & Production Technology
基金
国家科技重大专项"窄密度窗口钻完井技术与装备"(编号:2008ZX05021-03)的部分内容
关键词
精细控压
窄窗口
溢漏控制
自动节流控制
欠平衡
MPD
narrow mud weight window
influx or loss control
auto-choke control
unbalanced drilling
