Prediction of Stand Pipe Pressure Using Conventional Approach

Dipankar Chowdhury, P. Skalle, Mohammed M. Rahman
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引用次数: 4

Abstract

In rotary drilling operation, the hydraulic circuit typically consists of stand pipe, rotary hose, swivel, Kelly, drill pipe, drill collar, drill bit, and the annulus between the drillstring and the open hole or the casing. Stand Pipe Pressure, abbreviated as SPP, is defined as the total frictional pressure drop in the hydraulic circuit. SPP, an important drilling parameter in selecting proper mud weight, can be calculated using di erent rheological models. In this paper, the results obtained using the four widely used rheological models namely the Newtonian model, the Bingham plastic model, the Power law model and the Herschel-Bulkley model are presented. The rheological data used are collected by performing circulation test while drilling a vertical well in the Po valley, Italy. The rheological constants associated with each of the four models are calculated using regression analysis, For the three flow rates used during the circulation test, SPP has been predicted with a maximum error of 1.2% when compared with the measured values. The Bingham plastic model produces best SPP estimates for all the three flow rates for the drilling condition considered.
用常规方法预测立管压力
在旋转钻井作业中,液压回路通常由立管、旋转软管、旋转接头、方钻杆、钻铤、钻头以及钻柱与裸眼或套管之间的环空组成。立管压力,简称SPP,定义为液压回路中的总摩擦压降。SPP是选择合适泥浆比重的重要钻井参数,可采用不同的流变模型进行计算。本文介绍了常用的四种流变模型,即牛顿模型、宾汉姆塑性模型、幂律模型和Herschel-Bulkley模型的计算结果。所使用的流变性数据是在意大利Po山谷的一口直井中进行循环测试时收集的。对于循环测试中使用的三种流速,与实测值相比,SPP的预测最大误差为1.2%。Bingham塑性模型对考虑的钻井条件下的所有三种流速给出了最佳的SPP估计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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