煤田地质与勘探
煤田地質與勘探
매전지질여감탐
COAL GEOLOGY & EXPLORATION
2014年
4期
106-108
,共3页
莫海涛%郝世俊%叶根飞
莫海濤%郝世俊%葉根飛
막해도%학세준%협근비
大口径井%二开%先导孔%下导管钻进
大口徑井%二開%先導孔%下導管鑽進
대구경정%이개%선도공%하도관찬진
large-diameter well%second section%pilot hole%setting guide pipe drilling
煤矿区大口径井施工过程中,基于钻井安全考虑须首先完成一开表土层钻进,但其固井用大口径钢管会造成二开先导孔排渣不利,影响钻进效率。为解决先导孔钻进循环问题,通过理论分析和现场对比试验,提出下导管钻进技术。实践表明,下导管钻进技术对于大口径井二开先导孔钻进具有重要的借鉴意义。
煤礦區大口徑井施工過程中,基于鑽井安全攷慮鬚首先完成一開錶土層鑽進,但其固井用大口徑鋼管會造成二開先導孔排渣不利,影響鑽進效率。為解決先導孔鑽進循環問題,通過理論分析和現場對比試驗,提齣下導管鑽進技術。實踐錶明,下導管鑽進技術對于大口徑井二開先導孔鑽進具有重要的藉鑒意義。
매광구대구경정시공과정중,기우찬정안전고필수수선완성일개표토층찬진,단기고정용대구경강관회조성이개선도공배사불리,영향찬진효솔。위해결선도공찬진순배문제,통과이론분석화현장대비시험,제출하도관찬진기술。실천표명,하도관찬진기술대우대구경정이개선도공찬진구유중요적차감의의。
In the process of large-diameter well construction, it’s necessary to complete the first section drilling and cement with large-diameter pipe in the surface hole to reduce the risk of subsequent reaming. But this step could lead the pilot hole of the second section to reduce drilling speed as carrying cuttings incompletely. Finally we have put forward setting guide pipe drilling technology to solve the cycling problems by means of theoretical analysis and site comparative test. Practices show that it has important referential value for the second section drilling of large-diameter well by using drilling technology with guide pipe.