CAJ | 학술논문

极地冰层取心钻具的升降运动特性对提高钻进效率、减少孔内事故具有重要影响。在总结极地冰钻特点的基础上，分析了钻孔直径、钻具质量和钻井液的流变特性对钻具在升降过程中的影响，钻具在钻孔过程中运动的两阶段特性、滞流层的存在与影响因素，确定了因钻具的运动所引起的流体扰动量与扰动范围。研制了用于测试铠装电缆悬挂式钻具升降测试试验台和测试的方法，通过对3个不同直径与3个不同质量的钻具在其下落过程的实际测试，得出了钻具下落速度与直径呈二次方关系，与钻具的质量成线性关系的结论。
겁지빙층취심찬구적승강운동특성대제고찬진효솔、감소공내사고구유중요영향。재총결겁지빙찬특점적기출상，분석료찬공직경、찬구질량화찬정액적류변특성대찬구재승강과정중적영향，찬구재찬공과정중운동적량계단특성、체류층적존재여영향인소，학정료인찬구적운동소인기적류체우동량여우동범위。연제료용우측시개장전람현괘식찬구승강측시시험태화측시적방법，통과대3개불동직경여3개불동질량적찬구재기하락과정적실제측시，득출료찬구하락속도여직경정이차방관계，여찬구적질량성선성관계적결론。
The motion characteristics and control in hole make a big difference in improving the efficiency of drilling and re-ducing the hole accident in the process of lifting tool during polar ice core drilling.Depending on the summarization of the characteristics of polar ice drilling, analysis is made on the impact to the borehole structure, drilling tool structure, the quality of the drilling tool and rheological behavior of drilling fluid.The characteristics of two stages of tool motion in drill-ing process, the existence of stagnant layer and the influence factors determine the quantity and range of the fluid disturb-ance.A lifting test-bed and test method are developed for armored cable hanging tool testing, by the real testing of the fall-ing process of drilling tools with three different diameters and three different weights, the conclusion is drawn that the drill-ing down speed presents quadratic relationship with the diameter of drilling tool and linear relationship with the quality of drilling tool.The result has a vital theoretical and practical significance in improving the drilling efficiency in Antarctic, saving the service auxiliary working time and guiding the acture work.