我队在某煤田进行钻探，因该煤田含煤地层厚达一百多公尺，且为极端破碎松软之炭质页岩，煤层最厚达二十多公尺。在这样地层进行钻探如何在保证质量的前提下提高效率成了一个严重问题。使用单岩心管钻进效率虽高，但取心率很低，使用双层煤心管钻进，每个回次最多钻进0.8公尺便堵死了，每个小班只能钻进2—3公尺。使用阿列克辛科式取煤管钻进 Our team drilled in a coalfield where coal-bearing formations are over 100 meters thick and are extremely crushed, soft carbonaceous shale with a coal seam thickness of over 20 meters. It is a serious problem how to improve the efficiency under the premise of drilling in such strata. The use of single core pipe drilling efficiency is high, but heart rate is very low, the use of double-layer coal core pipe drilling, each back up to 0.8 meters will be blocked up, each small class can only drill 2-3 meter. Use Alexei Syko pipe to drill