The most primitive hole challenge is cleaning the hole, which is more severe in deviated wells. This problem was tackled in this research via experimental analysis and graphical evaluations. To hit this aim, rheological parameters were experimentally obtained, and Noah’s model was used to determine cutting bed erosion time at varying heights. A graphical evaluation was done using a case study of deviated wells X and Y from a Niger Delta field. The result shows that low-viscosity fluid, KCL polymer fluid and high-viscosity fluid take 124, 283 and 342 min, respectively, to erode equal height as graphical evaluation shows that hole cleaning will grow complex on deviation. Thus, the deduction from this work in reducing non-productive time (NPT) related to hole cleaning in drilling operation is first, prior to making a trip, pumping low-viscosity fluid at a high flow rate. Secondly, during drilling, increasing drill string rotation in deviated wells can effectively stir the cuttings into the annulus above the low session of the hole.

最原始的井眼挑战是清理井眼，这在斜井中更为严重。本研究通过实验分析和图形评估解决了这个问题。为了实现这一目标，通过实验获得流变参数，并使用诺亚模型来确定不同高度的切割床侵蚀时间。使用尼日尔三角洲油田斜井 X 和 Y 的案例研究进行了图形评估。结果表明，低粘度流体、KCL 聚合物流体和高粘度流体分别需要 124、283 和 342 分钟来侵蚀相同的高度，因为图形评估表明，孔清洁会随着偏差而变得复杂。因此，从这项工作中减少与钻孔操作中的井眼清洁相关的非生产时间 (NPT) 的扣除首先是在下钻之前，以高流速泵送低粘度流体。其次，在钻井过程中，在斜井中增加钻柱旋转可以有效地将钻屑搅入井下段上方的环空中。