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用绳索取心钻具的岩心钻探用绳索取心钻具进行岩心钻探往往会比用常规岩心钻具所获得的钻进效率更高、岩心采取率更高,钻头的费用也低得多。如果钻孔深度增加,或者地层变化得破碎或出现断层时,这种优点就更为突出。
Core Drilling with Cord Coring Tools Core drilling with cord coring tools tends to be more efficient than conventional core drilling tools, with higher core take-up rates and much lower bit costs. This advantage is even more pronounced if the depth of the borehole is increased, or if the formation is broken or faulted.