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    1第六节 第六节 钻具 钻具 钻井时下入井内的钻头、钻柱、井下动力钻具、取心工 钻井时下入井内的钻头、钻柱、井下动力钻具、取心工 具以及一些辅助钻井工具(如事故处理工具)等简称为钻具。 具以及一些辅助钻井工具(如事故处理工具)等简称...

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