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一、热力钻具的结构热力钻具的结构比过去的空气-煤油类型钻具的外径减小了(外径为45毫米)。样机(图1)全长为3.25米,从喷咀出口到支承部分的长度为830毫米,燃烧筒直管部分有效长度为737.5毫米。由燃料入口送来的
First, the structure of thermal drilling tool Thermal drill structure than the previous air - kerosene type drilling tool outer diameter (outer diameter of 45 mm). The prototype (Fig. 1) has a total length of 3.25 meters and a length of 830 mm from the exit of the nozzle to the support. The effective length of the straight tube portion of the combustion tube is 737.5 mm. Brought by the fuel inlet