水力输送岩心钻探法即反循环连续取心钻探法。多年来，随着钻探生产效率的提高，辅助时间也随之增长，这个矛盾很尖锐，在钻探工艺上也有些改革，如绳索取心，其生产工艺连贯性好多了，生产时间增长多了，但用于生产的总时间，即我们说的纯钻进时间与非生产时间的总和，大致仍是相等的，矛盾依然突出。其次，在一些松软、松脆的岩层里，岩心采取率往往达不到地质方面的要求，有的人也在想方设法改用反循环取心法，以改善采取率不足的问题。 Hydraulic Conveying Core Drilling Method Reverse Circulation Continuous Coring Drilling Method. Over the years, along with the improvement of drilling production efficiency, the auxiliary time has also increased. This contradiction is acute. Some reforms have been made in the drilling process, such as rope coring. The production process is much more coherent and the production time increases more. However, the total time used for production, that is, the sum of the purely drilling time and non-production time we say, is still roughly equal and the contradiction remains outstanding. Secondly, in some soft and crisp rock formations, the core utilization rate often does not meet the geological requirements. Some people are also trying to use reverse-cycle coring methods to improve the problem of under-utilization.