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Name Registered Capital Employees Main Business
Xi'an ZhengYuan Well Image Electronic Tech Co. Ltd ¥ 5 Million 1-100 Research and Development of Visual Detection Technology for Oil and Gas Wells, Equipment Manufacturi
Tartan Energy Tech Shanghai Ltd ¥42,844,318 1-100 high-end equipment and technical services for the development of unconventional energy.
Haimo Technologies Group Corp. ¥384,766,000 101-1,000 production, equipment , environmental protection, data management, production optimization
China Oil Hbp Science&Technology Co Ltd ¥107,081,000 1,001-5,000 oil and gas development and exploitation
Sino Geophysical Co.,Ltd. ¥320,000,000 101-1,000 seismic processing and interpretation,
Xinjiang Zhundong Petroleum Tech Co Ltd ¥239,177,000 1,001-5,000 petroleum technology services, construction and installation services
Landocean Group Limited ¥712,772,000 1,001-5,000 oil and gas industry services
Tong Oil Tools Co.,ltd. ¥440,432,000 101-1,000 stimulation of oil/gas production
Yantai Jereh Oilfield Services Group Co., Ltd. RMB Yuan 958 million 1,001-5,000 Jereh provides integrated solutions for the oil and gas, power, and environmental management sectors
Sinopec Oilfield Service Corporation RMB Yuan 14.1 billion 10,001+ Physical Geography, Drilling, Detection Logging, Downhole Special Operations & Engineering Construct
Zhejiang Renzhi Co.,Ltd. RMB Yuan 4.12 billion 101-1,000 Oilfield Chemicals, Oilfield Equipment and Tools
China Oilfield Services Limited RMB Yuan 4.77 billion 10,001+ The leading integrated oilfield services providers in the Asian offshore market.
GI Technologies (Beijing) Co., Ltd. RMB Yuan 484 million 101-1,000 A specialized manufacturer of oil well logging instruments.
Petro-king Oilfield Services Limited - 101-1,000 A leading independent China-based provider of high-end oilfield services specializing in well drilli
PetroChina Company Limited USD$100,000.00 10,001+ Oil and gas producer and distributor.

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