摘要
在分析欠平衡钻井过程中井眼流体基本流型的基础上,给出了一套计算环形空间及钻杆内部压降的计算公式。计算结果表明,该套公式较为精确地模拟了欠平衡钻井过程中井眼压力分布的规律。
Based on analysis of the basic flowing pattern of borehole fluids during under-balanced drilling operation, a set of formula is presented for calculating pressure drawdowns in the annulus and drill strings. Calculation results show that they accurately reveal the distribution pattern of pressure in wellbore during under-balanced drilling operation.
出处
《河南石油》
2002年第2期33-35,共3页
Henan Petroleum
关键词
欠平衡钻井
多相流动
摩阻损失
压力梯度
计算
under-balanced drilling, multi-phase flow, loss of frictional resistance, pressure gradient, calculation
