摘要
为解决连续循环钻井系统在分流增压作业过程中出现的钻井液循环压力波动的问题,通过对连接循环钻井系统分流增压作业过程分析,建立了相应的数学物理模型通过对连接循环钻井系统分流增压作业过程分析,建立了数学物理模型,通过仿真分析对引起系统压力波动的机理进行了研究,提出了优化方案,并进行了试验验证。分析结果表明,增压过程中因分流而导致循环流量快速下降是引起系统压力波动的主要原因;选取合适的控制阀,调节相应的节流控制参数,可以有效减小泵压波动的幅度;预填充时尽量完全排走腔体内的残余气体、提高预填充压力和缩短增压管线长度可有效减小泵压波动幅度,缩短波动时间。
In order to solve the problem of drilling fluid circulating pressure fluctuation of continuous circula?tion drilling system in the diversion and boosting operation, the diversion and boosting process of the system is ana?lyzed to build a appropriate mathematical and physical model for simulation analysis?Analysis results show that, rapid drop of circulation flow due to diversion in the boosting process is the primary cause for pressure fluctua?tion?Pump pressure fluctuation range can be effectively reduced by selecting an appropriate control valve and adjus?ting corresponding throttle control parameters?Moreover, pump pressure fluctuation range and time can be effective?ly reduced by minimizing residual gas of the chamber during pre?filling, improving pre?filling pressure and reduc?ing boosting pipeline length?Extension of throttle valve linear opening time can help to reduce pump pressure fluctu?ation range and increase boosting time?Appropriate parameters should be selected by considering the relation be?tween reduction of pump pressure fluctuation range and increase of boosting time based on site conditions.
出处
《石油机械》
2015年第8期16-20,共5页
China Petroleum Machinery
基金
国家科技重大专项"窄密度窗口安全钻完井技术及配套装备"(2011ZX05021-003)
关键词
连续循环钻井系统
分流增压
压力波动
仿真分析
优化
continuous circulation drilling system
diversion and boosting
pressure fluctuation
simulation analysis
optimization
