解放以来,特别是无产阶级文化大革命以来,在党的正确领导下,各制造厂和油田的工人和技术人员,在独立自主,自力更生的方针指引下,生产了一些常用的打捞工具,基本上满足了钻井打捞中一般的需要。但是经过这次调查,感到钻井打捞工具无论在品种、性能、规格上都与目前石油工业迅猛发展的形势很不适应,具体表现在:一是品种少,打捞钻柱的 Since the liberation, especially since the Great Proletarian Cultural Revolution, under the correct leadership of the party, workers and technicians from various manufacturing plants and oil fields, under the guidance of the principle of independence and self-reliance, have produced some commonly used fishing tools basically meeting the needs of the people Drilling and fishing in the general needs. However, after this investigation, it is felt that the drilling and salvage tools are not suitable for the current situation of rapid development of petroleum industry in terms of variety, performance and specifications. The specific performance is as follows: First,