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首页> 外文期刊>Journal of Energy Resources Technology >Annular Frictional Pressure Losses for Drilling Fluids
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Annular Frictional Pressure Losses for Drilling Fluids

机译：用于钻井液的环形摩擦压力损失

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摘要

In the paper, it is demonstrated how a Herschel-Bulkley fluid model, where the parameters are selected from relevant shear rate range of the flow and are parametrically independent, can be used for pressure loss calculations. The model is found to provide adequate pressure loss predictions for axial flow in an annulus where the inner cylinder does not rotate. It is described how one can simplify a slot model approximation of the annulus pressure loss using the Herschel-Bulkley fluid model (Founargiotakis model). This simplified model gives approximately the same accuracy as does the full Founargiotakis model. It is shown that the use of such a parallel plate model gives reasonably good fit to measured data on laminar flow of oil-based drilling fluids if the viscous data are measured at relevant shear rates for the flow. Laboratory measurements indicate that the use of the simplified pressure loss model is also valid for turbulent flow. However, the predictions should be adjusted for the surface roughness in the well.
机译：在本文中，证明了Herschel-Bulkley流体模型，其中参数从流动的相关剪切速率范围内选择并且是参数独立的，可用于压力损耗计算。发现该模型提供了在内筒不旋转的环中的轴向流动的足够压力损失预测。描述了如何使用Herschel-Bulkley流体模型（FounarGiotakis模型）简化环形压力损失的插槽模型近似。这种简化的模型具有大致相同的精度与完整的FounarGiotakis模型一样。结果表明，如果在流动的相关剪切速率下测量粘性数据，则使用这种平行板模型的使用可以合理地贴合在基于油基钻井液的层流式流动的数据。实验室测量表明，使用简化的压力损失模型也适用于湍流。然而，应该对井的表面粗糙度调整预测。

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