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管柱在充有钻井液的井内运动时会引起波动压力,将使井内压力系统失去平衡而引起井喷、井漏、井塌或卡钻等井下复杂情况和事故。故准确预测和控制波动压力是钻井工作者关心的问题。本文提出了井内波动压力的动态模拟法,并对有关的影响因素进行了分析。

Dynamic Simulation of the Undulating Pressure in a Well and Its Affecting Factors

The motion of drill string in a well filled with drilling fluid will cause undulating pressure, which will make the pressure system in the well loss balance, causing downhole complication and accident such as blowout, lost circulation, borehole wall sloughing and sticking etc. so accurately predicting and controlling the undulating pressure is the problem with which drilling workers are concerned. In this paper, the influencing factors concerned are analyzed on the basis of the undulating pressure in a dynamically simulating well.