M-I LLC engages in the provision of drilling and completion fluid services. It supplies fluids and additives to oil and gas companies. The firm also offers pressure control, rig instrumentation, and drilling waste management products and services. The company is headquartered in Houston, TX.

Recover Energy Services, Inc. engages in scientific and technical consulting services. The company is headquartered in Calgary, Canada.

Halliburton Energy Services, Inc. provides oilfield services. It offers technical products and services for petroleum, natural gas exploration and production. The company is headquartered in Houston, TX.

China National Petroleum Corporation (CNPC) is an integrated international energy company. Based in China, we have oil and gas assets and interests in over 30 countries in Africa, Central Asia-Russia, South America, the Middle East and the Asia-Pacific. CNPC is China's largest oil and gas producer and supplier, as well as one of the world's major oilfield service providers and a globally reputed contractor in engineering construction, with businesses covering petroleum exploration & production, natural gas & pipelines, refining & marketing, oilfield services, engineering construction, petroleum equipment manufacturing and new energy development, as well as capital management, finance and insurance services. - Crude output: 110.33 million tons per year - Natural gas output: 79.86 billion cubic meters per year - Crude oil production: 53% of China's total - Natural gas production: 74% of China's total - Crude runs: 147.16 million tons per year - Domestic service stations: 19,840 - Domestic pipelines: 66,801 kilometers, including 16,369 kilometers for crude oil (nearly 67% of China's total), 40,995 kilometers for natural gas (77% of China's total) and 9,437 kilometers for refined products ( 48% of China's total) - Providing oilfield services and engineering construction in 63 countries around the world.

Xinjiang Zhongren Petroleum Technology Co., Ltd., established on 2018-02-09, The business scope includes special equipment for oil drilling and production,Special equipment for environmental protection,Manufacture of special pharmaceutical materials for environmental pollution treatment;Metal Products Processing;Mining and dressing of other unlisted non-metallic ores;Road construction,Environmental Engineering;Solid Waste Treatment,Other pollution control;Soil Pollution Control and Restoration Services;Engineering and Technology Research and Experimental Development;Engineering Technology and Design Services,Environmental protection technology promotion service,Biotechnology Extension Services;Mechanical equipment and welding equipment sales,repair,lease,Technical Services;Sales of welding materials;Production and sales of oilfield additives;Activities supporting oil and gas extraction;road freight transport(Does not contain dangerous goods).(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

China National Petroleum Corporation Safety and Environmental Protection Technology Research Institute Co., Ltd., established on 2007-12-13, Business scope includes hosting<Oil and Gas Field Environmental Protection>Magazine(The periodical publication license is valid until2018year12moon31day);Design and produce print ads,Use own<Oil and Gas Field Environmental Protection>magazine post ad;Safety,Environmental friendly,occupational health,Research on Energy Saving Technology;healthy,Research on emergency technology for safety and environment;healthy,Information Services for Safety and Environment;healthy,Technical Assessment of Safety and Environment;healthy,Technical training on safety and environment;healthy,Inspection and monitoring of safety and environment;healthy,Safety and Environmental Engineering Design and Contracting;Safety,Environmental friendly,Development and sales of energy-saving equipment;Safety,environmental impact,Occupational Health Evaluation;Cleaner Production Review and Audit;healthy,Safety and Environmental Technology Promotion;Development of Oilfield Chemicals;technology development,technical consulting,technology transfer,Technical Services;Anti-terrorism training.(Enterprises independently choose operating projects according to law,Carry out business activities;Items subject to approval by law,Carry out business activities in accordance with the approved content after approval by relevant departments;Do not engage in the business activities of projects prohibited and restricted by the city's industrial policies.)

Beijing Queentec Environmental Protection Sci-Tech Co. Ltd. specializes in the control of solid pollutions and industrial wastewater. The firm's business includes developing environmental protection technology of and equipping processing units for pollutions in oil and gas fields and supplying related technical services and materials. The company was founded in November 2010 and is headquartered in Beijing, China.

Xi'an Huasheng Kuntai Energy and Environmental Protection Technology Co., Ltd., established on 2015-05-15, The scope of business includes technology development for energy enterprise pollution control;Research and development of energy ecological environment system;Application software development;R&D and promotion of environmentally friendly new materials and products;solid waste disposal,Technology Development of Sewage and Wastewater Treatment,Technology Promotion,Technology transfer,technical consulting;Environmental Engineering Technical Services;Design of Municipal Environmental Protection Project,Construction and technical consulting services.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Ordos Haoxin Ruiyuan Kejing Engineering Co., Ltd., established on 2016-05-24, Business scope includes licensed business items:No general operating items:Sewage treatment in the field of environmental protection,Solid waste treatment,Project contracting for air treatment;Environmental Engineering Design,Consulting and Services;water treatment equipment,Atmospheric treatment equipment,Production and sales of solid waste treatment equipment

HARD ROCK MINING: Equipment and services for hard rock excavation; CONSTRUCTION: manufacture of construction machinery, equipment and services; COAL: Equipment and services for soft mineral excavation; ROXON: conveyer systems and bulk materials handling equipment; TAMROTOR: manufacture of industrial compressors.

China National Offshore Oil Corporation, or CNOOC Group, is a major national oil company in China. It is the third-largest national oil company in the People's Republic of China, after CNPC (parent of PetroChina) and China Petrochemical Corporation (parent of Sinopec). The CNOOC Group focuses on the exploitation, exploration and development of crude oil and natural gas in offshore China. The Group is the largest producer of offshore crude oil and natural gas in China and one of the largest independent oil and gas exploration and production companies in the world. The Group mainly engages in exploration, development, production and sale of crude oil and natural gas. The Group’s core operation areas are Bohai, Western South China Sea, Eastern South China Sea and East China Sea in offshore China. Overseas, the Group has oil and gas assets in Asia, Africa, North America, South America, Oceania and Europe. As at 31 December 2015, the Group owned net proved reserves of approximately 4.32 billion BOE, and its average daily net production was 1,358,022 BOE (unless otherwise stated, all amounts of reserve and production in this report include our interests in equity method investees). The Group had total assets of approximately RMB664.4 billion.

CNPC Chuanqing Drilling Engineering Co., Ltd., established on 2008-07-18, Business scope includes general items:Engineering and Technology Research and Experimental Development;Mineral dressing;Engage in investment activities with own funds;Technical Services,technology development,technical consulting,Technology Exchange,technology transfer,Technology Promotion;Engineering technical service(planning management,survey,design,Except supervision);Oil and Gas Technical Services;Industrial Internet Data Service;data processing services;Data processing and storage support services;software development;Information system operation and maintenance services;Information Technology Consulting Services;Resource recycling technology research and development;Soil Pollution Control and Restoration Services;Environmental emergency management service;Environmental Protection Monitoring;Eco-environmental material manufacturing[Branch operation];Water Environment Pollution Prevention and Control Services;Atmospheric Environmental Pollution Prevention and Control Services;Soil Environmental Pollution Prevention and Control Services;Solid Waste Treatment;Import and export;Import and export agency;Technology Import and Export;Foreign contracted projects;Refined oil wholesale(Free of Hazardous Chemicals);Lubricant sales;Chemical product sales(No licensed chemical products);Sales of office equipment consumables;Fire Equipment Sales;Sales of labor protection products;Auto New Car Sales;Machinery sales;Mechanical Parts,Parts sales;Sales of special equipment for oil drilling;Special Equipment Sales;Petroleum product sales(Free of Hazardous Chemicals);electronics sales;internet sales(Except for products that require a license for sale);software sales;Auto Parts Retail;sales agent;Information security equipment sales;Security equipment sales;Catering Management;Land use right lease;housing lease;Non-residential real estate leases;Machinery and Equipment Leasing;Small and mini bus rental business service;emergency services;Safety technical training for special operators;business training(Does not include education and training,Vocational skills training and other licensed training);Unit logistics management service;Manufacturing of Specialty Chemical Products(Free of Hazardous Chemicals)[Branch operation];Manufacture of non-metallic mineral products[Branch operation];R&D of metal products;General equipment manufacturing(Does not include special equipment manufacturing)[Branch operation];Manufacturing of special equipment(Manufacture of licensed professional equipment not included)[Branch operation];Instrument Manufacturing[Branch operation];Metalwork Repair;Mechanical equipment research and development;General Equipment Repair;Domestic Freight Forwarding;Domestic container cargo transportation agency;Loading and unloading;Storage equipment rental service;Operation of Road Freight Transport Station;International Freight Forwarding;Environmental protection special equipment sales;property management;Motor Vehicle Repair and Maintenance(Except for projects subject to approval by law,Carry out business activities independently in accordance with the law with a business license).licensed items:Indoor environment detection;accommodation service;Catering Services;Gas operation;Water production and supply;road freight transport(Does not contain dangerous goods);Construction Engineering Construction(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments,The specific business items are subject to the approval documents or licenses of relevant departments).

Shangluo Hailan Technology Co., Ltd., established on 2014-12-22, Business scope includes licensed business items:.General operating items:Research and development of special equipment for environmental protection,manufacture,Sales,Technical consulting and installation engineering services;Non-Metal Scrap and Scrap Recycling,processing,Technology research and development and promotion;Development of drilling aids,Production and sales;Drilling technology training and engineering services;Eco-agricultural tourism project development;Harmless treatment of waste mud and cuttings*(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)*(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Baker Hughes, Inc. is a private company headquartered in Houston, TX. The firm manufactures oilfield equipment.

Onsite Treatment Technologies AS (doing business as OTT AS) is a private company headquartered in Sola, Norway, that provides drilling waste management.

Chengdu Keheng Environmental Technology Co., Ltd., established on 2014-03-19, Business scope includes new energy,new material,Environmental friendly,Energy-saving technology promotion service;water pollution control;Air Pollution Control;Solid Waste Treatment;Noise Pollution Control;water resource management;Municipal waste removal service(Did not obtain the relevant administrative license(approval),Do not carry out business activities);research and development,Sales of special equipment for environmental protection,Electrical equipment and technical services;research and development,Sales:Chemical products and raw materials(Free of Hazardous Chemicals),chemical reagent(Free of Hazardous Chemicals),Instrumentation,Special equipment for oil drilling;Engineering Consulting;Environmental Engineering Design,construction(Operating with a qualification certificate);software development;computer system integration;Information system integration service;Environmental technology development,technical consulting,Technical Services;Conference Services;Data processing and storage services;Environmental Protection Monitoring;Technology intermediary service;Business Management Consulting;market research.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments).

Mobil Corp. operates primarily in the petroleum industry. The company is headquartered in The Woodlands, TX.