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美国圣地亚实验室近几年集中力量研制能提高钻进效率、降低成本的四种非常规的新式钻头。其中的一种是与克瑞斯登森金刚石产品公司合作设计的固定头式连续链钻头。这是美国能源部地热能源署倡议的一个项目；是圣地亚实验室为了改进油、气和地热勘探技术进行研制的钻进和测井项目之一。
In recent years, San Diego-based laboratories have focused on the development of four unconventional new drills that increase drilling efficiency and reduce costs. One of them is a fixed-head continuous chain bit designed in cooperation with Chris Dyson Diamond Products. This is a project initiated by the US Department of Energy’s Geothermal Agency and one of the drilling and logging projects developed by Sandia Laboratories to improve oil, gas and geothermal exploration technologies.