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Recently, Sinopec's key scientific and technological research project "Research on application and optimization matching technology of carbon fiber sucker rod" undertaken by the production unit of Shengli Oilfield Petroleum Engineering Technology Research Institute passed the appraisal of Sinopec's Ministry of science and technology. According to the appraisal of the expert group, the research results of the project have reached the international leading level. It is understood that the achievements of the project have been applied in large-scale in many oilfields across the country, with an accumulative oil increase of nearly 100000 tons and a direct economic benefit of more than 200 million yuan.
Carbon fiber continuous sucker rod is light, high-strength and corrosion-resistant. Its density is one quarter of that of steel rod, and its strength is three times of that of steel rod. It can reduce the load of rod column by more than 50% to replace the traditional sucker rod. In view of the problems of heavy lifting load, high energy consumption, limited depth and short maintenance free period of metal sucker rods in the middle and late stage of oilfield development, the Institute of production machinery has carried out "Research on the application technology of carbon fiber sucker rods" since 2014, and "Research on the application optimization matching technology of carbon fiber continuous sucker rods" in 2016, making full use of the advantages of carbon fiber materials, and tackling key problems, forming a mature carbon rod manufacturing The application technology system with connection, operation, optimization of lifting system, special lifting equipment and application supporting mode as the core has formed four application modes, i.e. deep pumping for production increase, large pump for liquid extraction, corrosion prevention for life extension and load reduction for energy conservation. By the end of 2018, carbon fiber technology has been tested in 459 wells in Shengli, northwest, Zhongyuan and other oilfields, with 760000 meters of carbon rods applied, 98600 tons of oil increased, 13.62 million kilowatt hours saved, 1520 days of longest production cycle, 1.5 times longer average pump inspection cycle for corroded wells, and 245 million yuan of direct economic benefits realized.