Sediments frequently appear at the bottom of oil and gas wells in the bottom of carbonate rocks during completion or production, seriously affecting the productivity. In order to solve the wellbore cleaning problem, this article applies the Bernoulli equation theory method, the finite element method based on the standard turbulence model and the laboratory test to verify a kind of negative pressure wellbore cleaning tool which can establish local reverse circulation under the action of high-pressure water jet and salvage the bottom debris. Through the numerical analysis of the cleaning tool structure, it is found that the wall face diameter is at least two times of the nozzle hole diameter to effectively play the cleaning tool performance. If the total area of nozzle outlet is 48π mm², the cleaning tool fishing capacity of six nozzle structures is improved the most. The analysis of the adaptability of the cleaning tool shows that the cleaning tool with an outer diameter of 104 mm is most suitable for the casing shaft with an inner diameter of 127.3 mm. The cleaning tool was applied to the field operation and successfully cleaned the wellbore, effectively increasing the wellbore productivity.

在完井或生产过程中，沉积物经常出现在碳酸盐岩底部的油气井底部，严重影响了生产率。为了解决井筒清洁问题，本文采用伯努利方程理论方法，基于标准湍流模型的有限元方法和实验室试验，验证了一种负压井筒清洁工具。高压喷水的作用并清除底部的碎屑。通过清洁工具结构的数值分析，发现壁面直径至少是喷嘴孔直径的两倍，以有效地发挥清洁工具的性能。如果喷嘴出口的总面积为48πmm ²，六个喷嘴结构的清洁工具捕捞能力得到最大提高。对清洁工具适应性的分析表明，外径为104毫米的清洁工具最适合内径为127.3毫米的壳体轴。清洗工具应用于现场作业，成功清洗了井筒，有效提高了井筒生产率。