清扫大角度斜井井身往往很困难 ,因泵速有限、钻杆偏心、造斜角度陡、井底温度高 ,且出现椭圆形井身 ,这些对清扫井身有影响 ,井身又易导致岩屑堆积 ,产生诸如钻杆扭矩及阻力过大和进尺速度低等问题 ,这在钻延伸井作业时尤为明显。过去曾用重晶石作清扫剂 ,但沉重岩屑上井前须 It is often difficult to clean large-angle inclined well boreholes because of limited pumping speed, eccentric drill stems, steep beveling angles, high downhole temperatures, and the appearance of oval wellbores, which have an impact on the wellbore and are prone to cause wellbores Debris buildup creates issues such as excessive torque and drag on the drill stem and low footage speeds, which is especially noticeable when drilling and extending well operations. Barite was used as a cleaning agent in the past, but heavy cuttings were required before going to the well