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CNPC the Great Wall Drilling Engineering Company Limited |
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CNPC Daqing Petroleum Administration Bureau |
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PetroChina Changqing Oilfield Company |
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CNPC Chuanqing drilling Changqing drilling company |
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CNPC Chuanqing drilling East Sichuan Drilling Company |
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CNPC Baoji Petroleum Machinery Co., Ltd. |
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n Bohai Liaohe heavy oil equipment Co. Ltd. |
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The Great Wall oil drilling materials branch |
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PetroChina Jidong Oilfield Company |
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PetroChina Liaohe Petroleum Exploration Bureau materials company |
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PetroChina Liaohe Equipment Group Co., Ltd. |
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CNPC Sichuan Petroleum Administration Bureau Materials Corporation |
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PetroChina Tarim Petroleum Exploration and development company |
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PetroChina West Drilling Engineering Company Limited |
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In the petroleum drilling engineering technology research institute |
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CNPC Chuanqing Drilling Engineering Technology Research Institute |
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Sinopec Huabei Petroleum Bureau Sanpu oil company |
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Sinopec Huabei Petroleum Bureau five general oil company |
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Sinopec North China Petroleum West Branch |
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Sinopec Jianghan Petroleum Xinjiang branch |
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Company Sinopec Jianghan Oilfield |
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Exploration and Development Research Institute of Sinopec |
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CNOOC Group Materials Branch |
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Yangtze University |
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Xi'an Petroleum University |
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China University of Geosciences Wuhan. |
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China University of Petroleum Beijing. |
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Southwest Petroleum University |
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China University of Mining and Technology |
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Huazhong University of Science and Technology |
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Zhongyuanzongji Petroleum Equipment Co., Ltd. |
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