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复杂岩层钻进中的护壁堵漏问题,至今仍然是生产中的难题之一.近年来的研究工作着重在选择护堵材料及应用技术方面,虽然取得了一定成绩,积累了一定经验,但对护堵的工作对象——地层,缺乏系统的分析与研究,如地层失稳的条件,漏失的规律等,一般仅停留在感性认识的水平上.为了进一步提高护堵效果,很有必要按照地层客观存在的条件,外界影响因素,分析其产生复杂情况的原因,从中找出维持孔壁稳定和孔眼系统平衡的方法. 小口径金刚石钻进在冶金、地质、二机、煤炭等部门推广以来,在提高钻进效率,保证钻孔质量和降低钻探成本等方面,都取得了一定经验.
It is still one of the difficult problems in the production of complex rock strata during the drilling process.Recent years, research work has focused on the selection of retaining materials and application technology, although some achievements have been made and some experience has been gained, Sticking to the work object - strata, the lack of systematic analysis and research, such as the conditions of formation instability, the loss of the law, generally only stay in perceptual level.In order to further improve the blocking effect, it is necessary to follow the formation Objective conditions of existence and external influencing factors, and analyzes the causes of its complicated situation, and find out the ways to maintain the stability of the hole wall and the balance of the hole system.During the promotion of small diameter diamond drilling in metallurgy, geology, machinery, coal and other departments, In improving drilling efficiency, to ensure the quality of drilling and reduce drilling costs, have gained some experience.