CAJ | 학술논문

本文通过岩屑运移的启动条件及悬浮条件分别建立考虑钻具旋转影响的岩屑颗粒翻滚、上升的临界启动速度模型,分析钻具旋转对岩屑临界启动速度的影响规律,通过计算发现：在150RPM下,宽间隙处最大影响率为38%,窄间隙处最大影响率为47%;最后根据岩屑临界启动速度模型,考虑钻具旋转作用对偏心环空不同间隙处岩屑启动与运移规律的影响,真实的描述了岩屑在环空中不同位置处的运动状态,提出了评价井眼清洗效果的新方法。
본문통과암설운이적계동조건급현부조건분별건립고필찬구선전영향적암설과립번곤、상승적림계계동속도모형,분석찬구선전대암설림계계동속도적영향규률,통과계산발현：재150RPM하,관간극처최대영향솔위38%,착간극처최대영향솔위47%;최후근거암설림계계동속도모형,고필찬구선전작용대편심배공불동간극처암설계동여운이규률적영향,진실적묘술료암설재배공중불동위치처적운동상태,제출료평개정안청세효과적신방법。
In this paper,the critical startup velocity models of debris rolling and floating,considering the effect of drillingstring rotation,were respectively established in accordance with the startup condition and suspension condition of debris migration.Through calculating,we find that： At 150RPM,the biggest effect rate to the wide annular tolerance is 38%,to the narrow annular tolerance is 47%;at last,in accordance with the critical toggle speed model of rock debris,with the effect of drill rotating function to rock debris start and migration law at different eccentric annulus,describe the cuttings motion state of different position in annular,and a new method of evaluate borehole cleaning effect is proposed.