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首页> 外文期刊>Arabian Journal for Science and Engineering >New Anti‑balling Reamer Blade for Reaming in Soft and Sticky Formation Easy to Hydration and Collapsing
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New Anti‑balling Reamer Blade for Reaming in Soft and Sticky Formation Easy to Hydration and Collapsing

机译：新型防弹铰刀，用于铰接柔软而粘稠的地层，易于水合和塌陷

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摘要

Traditional reamer blade with double-row cutters and middle channel structure frequently encounters the cuttings deposition and balling when reaming the soft and sticky formation which is easy to hydration and collapsing. Balling causes were analyzed from the view of the cuttings' properties and the hydraulic characteristics of the traditional reamer blade. Based on the analysis results, a new anti-balling reamer blade technology was presented to address this problem. Evaluations on the cutting force and working life of the new blade were conducted by comparison with the pilot polycrystalline diamond compact (PDC) bit. The theoretic working life of the new blade was about twice longer than that of pilot PDC bit. The hydrodynamic analysis results indicated that the disappearing of low-pressure region and turbulence combined with the lower differential pressure of the annulus fluid can significantly prevent the new reamer blade from cuttings deposition and balling.
机译：传统的双排绞刀和中间通道结构的铰刀在扩孔时容易遇到切屑的沉积和球化，形成的软而粘的组织易于水化和塌陷。从钻屑的性质和传统铰刀的水力特性的角度分析了起球的原因。根据分析结果，提出了一种新的防球铰刀技术来解决这个问题。通过与试验性多晶金刚石复合片（PDC）钻头进行比较，对新刀片的切削力和使用寿命进行了评估。新刀片的理论使用寿命大约是先导PDC钻头的理论寿命的两倍。流体力学分析结果表明，低压区和湍流的消失以及环空液压差的降低可以显着防止新铰刀刀片的cutting屑沉积和成球现象。

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