China Oilfield Services Ltd Zhanjiang Branch

International Industry Category: Mining

International Industry Major Class: Mining professions and auxiliary activities

International Industry Middle Class: Professional and auxiliary activities in the field of oil and gas extraction

International Industry Sub Class: Professional and auxiliary activities in the field of oil and gas extraction

Overseas dispatch and its strength、 scale、 Labor personnel required for overseas projects with corresponding performance； Domestic coastal ordinary cargo ships、 Transport of refined oil by tankers and crude oil by tankers between ports in Bohai Bay； For oil、 Exploration of natural gas and other geological minerals、 exploration、 Development and mining services； Engineering Survey、 Geotechnical engineering and soft foundation treatment、Underwater remote-controlled mechanical operations、Pipeline inspection and maintenance、 Positioning and navigation、 Surveying and mapping services、 Data processing and interpretation、 Oil and gas well drilling、 Well Completion、 Gamma logging、 Oil and gas well testing、 cementing、 Mud logging、 Drilling mud preparation、 Wellbore perforation、 Core sampling、 Directional well engineering、 Underground operations、 Oil and gas well repair、 Oil well stimulation construction、 Bottom well sand control、 Tripping and lowering oil casing、 Filtration and underground accident handling services； Equipment related to the above services、 tool、 instrument、 Inspection of pipes、 repair、 Leasing and sales business； mud、 Cementing additives、 Oilfield chemical additives、 Special tools、 Mechanical and electrical products、 Instruments、 Development of perforating equipment for oil and gas wells； Electromechanical、 communication、 Chemical products（ Except for hazardous chemicals） Sales； For oil field exploration、 Development、 Production and provision of shipping services、 Anchoring operations、 equipment、 facility、 repair、 Loading and unloading and other labor services； Ships、 mechanical、 Sales of accessories for electronic equipment; Environmental Engineering Services； Environmental protection equipment research and development、 manufacture、 lease、 Sale； Environmentally friendly process design； Environmental protection operation site construction and environmental protection operation services。（ Projects that require approval according to law， Business activities can only be carried out after approval from relevant departments）

Chinese Industry Category: Petroleum and Petrochemical

Chinese Industry Major Class: Oil and gas extraction

Chinese Industry Middle Class: Oil and gas production support activities

Chinese Industry Sub Class: Oilfield Services