关于钻探工程中洗孔工艺的分析研究

Analytical Research on Flushing Technology in Drilling Engineering /TANG Feng-lin1,2, SHEN Zhong-hua2,DUAN Long-chen1,PENG Li2,CHIKHOTKIN V.F.1(1. China University of Geosciences (Wuhan),Hubei, Wuhan,430074；2.Wuxi Drilling Tools Factory Co.,Ltd, Jiangsu Wuxi,214174)

摘要:

洗孔是钻探工程中的重要环节。冲洗介质在孔内进行循环，可以达到清洗孔底、携带和悬浮岩屑、冷却钻头和保护孔壁的目的。不同的洗孔工艺可以产生不同的复杂情况。冲洗液孔底反循环，由于冲洗液是反向循环，与岩心进入岩心管的方向一致，因此可以提高在裂隙、破碎、性脆、软硬不均等复杂地层钻进时采取岩心的数量和质量。俄罗斯莫斯科国立地质勘探大学KULIKOV V.V.博士等人在洗孔方面做了很多的研究工作，提出了钻孔钻进时洗孔复杂情况的分类，对地质钻探中常用的无泵钻具钻进、喷射式钻具钻进和气举钻具钻进时的洗井工艺问题进行了分析与讨论，提出了相应的建议。

Abstract:

Flushing technology is an important link in drilling engineering. Circulation of flushing fliuid in the hole can clean hole bottom, cool drill bit, carry & suspend cuttings and protect the hole wall. Different flushing processes can produce different complicated situations. Due to the same direction of reverse circulation of flushing fluid at the bottom hole and the core entering into the core barrel, the quantity and quality of cores can be improved in the fissured, fractured, brittle and unequal hardness formations. Doctor KULIKOV V.V., who works in Moscow State Geological and Prospecting University in Russia, and some others have carried out a lot of scientific works in the hole flushing technology, present the classification table of compicated flushing situations in drilling process, analyze and discuss the flushing technology in geological drilling with commonly used drilling with no pump technology, jet core drill and air-lift core drill, and some correspongding suggetions are put forward.