2 Li Helin, "Steel and surface strengthening technology for drilling rod fishing male cone and its influence on its service life", 1975 (3): 45-48.
3 Li Helin, carry out strength research on steel and materials for petroleum machinery to improve the quality and service life of petroleum drilling and production machinery products,1979 (3):1-17.
4 Li Helin, high chromium wear-resistant cast iron and its application in bimetallic cylinder liner of oil drilling and production machinery, 1980 (1): 49-56.
5 Li Helin, Effect of Shot Peening on Fatigue Crack Initiation and Propagation of Structural Steel Mechanical Engineering Materials,1983,7 (2): 62-66.
6 Li Helin, Fault Analysis and Feedback of Petroleum Mining Machinery, 1983, 12 (6): 52-57.
7 Li Helin, editor-in-chief, Collected Works of Petroleum Special Pipe, Xi 'an: Shaanxi Science and Technology Press, 1984- 1995.
Li Helin, Proceedings of the First Annual Meeting of Materials Society, Effects of alloying and heat treatment on strength and toughness of large-section low-carbon martensitic steel, Beijing: Petroleum Industry Press, 1996.
9 Li Helin, Investigation Report on Technical Level of Petroleum Machinery, Present Situation and Development of Low Alloy Mesh and Alloy Steel for Petroleum Mines, Machinery Industry Press, 1989.
Li Helin, 10, development trend and localization of oil well pipes-special pipes for petroleum,1997,5 (1):1-8.
Li Helin, 1 1, development trend and localization of oil and gas pipelines: special oil pipes,1997,5 (2):1-13.
Li Helin, 12, research field, preliminary achievements and prospect of oil pipeline engineering, special oil pipeline,1999,7 (1):1-8.
13 Li Helin, oil pipeline project. Beijing: Petroleum Industry Press, 1999.
14, Li Pingquan, Feng, Failure Analysis and Prevention of Oil Drill String, Beijing: Petroleum Industry Press, 1999.