论文部分内容阅读
煤田地质勘探在施工过程中,上部全为第四系、第三系地层,往下是白垩系、株罗系的地层,水敏性地层较多。开钻就是表土、流砂、砾岩,由于胶结不好,以往钻进上述地层,就得下套管护壁,有时即使下几种不同规格的套管仍解决不了问题。套管下多了,钻进时易脱节,而且起拔困难。有的地区钻孔施工,上部流砂七、八十米,在白垩系、株罗系的地层钻进,岩石为泥质胶结,钻进遇水膨胀,造成钻孔缩径,塌坍掉块,以往由于泥浆使用不当,钻进过程中经常发生粘附卡钻事故。钻孔护壁问题长期未得解决。一九七九年,我们根据吉林冶金地质学校钻探教研组室内“无固相冲洗液”的试验,选择了其中一种配方在现场进行了几个孔的生产试验,取得了显著效果。
In the process of coalfield geological exploration, all the upper part is Quaternary and Tertiary strata, and the Cretaceous and Zhuluo series strata downward with more water-sensitive strata. Drilling is the topsoil, quicksand, conglomerate, due to poor cementing, in the past into the above-mentioned formation, you have under the casing wall, and sometimes under several different specifications of the casing still can not solve the problem. More under the casing, easy to get rid of when drilling, and pulling up difficult. Drilling in some areas, the upper part of the sand flow seven or eighty meters, in the Cretaceous, Zhuluo formation stratigraphic drilling rock cementation, drilling water swelling, resulting in bore shrinkage, collapse block, In the past due to the improper use of mud, drilling stuck in the process of frequent sticky accident. Drilling wall problems have long been unsolved. In 1979, according to the “non-solid phase rinsing liquid” test conducted by the Teaching and Research Group of Jilin Metallurgy Geology School, we selected one of the formulations to conduct several hole production tests in the field and achieved remarkable results.