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Shanghai Dalong chains works Co., Ltd. is China¡¯s first manufacturer of oil field roller chain and the biggest production base as well. Exceeding others in the same trade in its complete range of specifications and reliable quality, Dalong brand oil field roller chain has received high opinion from customers and has been recommended as special chain for deep mining and export driller. In recent years, it has developed a series of oil extractor chains, like S127¡¢Z3315¡¢Z2512 and Z2814 which are also deeply welcomed by large oil fields. The products are used by oil drilling and extraction units of large oil fields all over the country, such as Daqing, Zhongyuan, Sichuan, Xinjiang, Shengli and Changqing. Superior to ordinary chains, they can also be used in high-strength transmission situations in other industries.
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