PetroChina Co. Ltd. engages in the petroleum related products, services and activities. It operates through the following business segments: Exploration and Production; Refining and Chemicals; Marketing; Natural Gas and Pipeline; and Head Office and Other. The Exploration and Production segment involves exploration, development, production, and marketing of crude oil and natural gas. The Refining and Chemicals segment focuses on the refining of crude oil and petroleum products, production and marketing of primary petrochemical products, derivative petrochemical products, and other chemical products. The Marketing segment includes marketing of refined products and the trading business. The Natural Gas and Pipeline segment comprises transmission of natural gas, crude oil, and refined products and the sale of natural gas. The Head Office and Other segment relates to cash management and financing activities, the corporate center, research and development, and other business services supporting the operating business segments of the Group. The company was founded on November 5, 1999 and is headquartered in Beijing, China.

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.

China Petroleum Engineering & Construction Corp. specializes in oil engineering, manufacturing, construction, and lump-sum contracting. The firm operates its business through following segments: Engineering Design, Construction and erection, Engineering Manufacture, Engineering Procurement and Technical Services. Its services include preliminary consultation on large oil projects, feasibility study, environmental impact and safety assessments, survey and measurement, design, procurement, construction, manufacturing, supervision, commissioning trial and operating maintenance as well as project engineering, procurement and construction () and project management contracting. The company was founded in 1998 and is headquartered in Beijing, China.

Chevron Oronite Technology BV, part of Chevron Corp., is a company headquartered in Rotterdam, the Netherlands, that develops, manufactures & markets performance additives for fuels & lubricating oils.

China Petroleum Engineering Co. Ltd. is a company headquartered in China ultimately controlled by the Government of China that provides engineering and management consulting services.

Changchun Automobile Gas Development Co. Ltd., a subsidiary of Changchun Gas Co., Ltd., is a company headquartered in Changchun, China, that engages in the development of gas for automobile use. Changchun Gas Co., Ltd. acquired Changchun Automobile Gas Development Co. Ltd. on August 02, 2007 for $0.96 million.

Changqing Engineering Design Co., Ltd., established on 1999-10-21, Business scope includes general items:Oil and Gas Engineering,Chemical and petrochemical engineering,construction work,decoration works,Communication Engineering,Municipal Engineering,Power Engineering,Road construction,Fire Engineering,Anti-corrosion insulation project,Automation Control Engineering,Light steel structure engineering,Environmental Engineering,Geotechnical Engineering,General Contracting of Pipeline Works,consult,design;Engineering cost consulting business;Engineering bidding agency;Engineering project management and technical services;Oil installation,Research and development of natural gas installations,Sales;Research and development of computer technology and products,Sales;account Serive;Catering Services(limited branch operation).(Except for projects subject to approval by law,Carry out business activities independently in accordance with the law with a business license)licensed items:Construction labor subcontracting;Import and export;Technology Import and Export;accommodation service;Mapping service;Inspection and testing service;Construction Project Supervision;Construction Engineering Survey.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments,Specific business projects are subject to approval results)

Sinopec Petroleum Engineering Technology Service Co., Ltd., established on 2012-06-28, Business scope includes construction general contracting,Professional contractors,Labor subcontracting;Construction Project Management;Providing services for onshore and offshore oil and gas extraction;Engineering and Technology Research and Experimental Development;construction work preparation;Sales of machinery and equipment,Wujinjiaodian,computer,Software and Auxiliary Equipment;Machinery and Equipment Leasing;Energy and Mineral Geological Exploration,Solid Mineral Geological Exploration;Geological Exploration Technical Services;oil,Investment in natural gas and mineral energy projects;Organization of enterprises with manufacturing operations to manufacture metal structures,metal tools,metal pressure vessel,General instrumentation,Special Instruments,chemical reagent,chemical additives,Specialty Chemicals(including oilfield chemicals)and mine,metallurgy,Construction Special Equipment;Organize enterprises with foreign contracting project permits to contract overseas petroleum projects,natural gas engineering,chemical engineering,bridge engineering,Road construction,building engineering,Water Resources and Hydropower Engineering,Municipal public works,Steel structure engineering,Power Engineering,Fire facilities engineering,Industrial installation engineering and domestic and international bidding projects;Labor dispatch;Import and export,Agent import and export,Technology Import and Export.(After receiving this license,You should go to the Housing and Urban-Rural Development Department to obtain an administrative permit,File with the Commerce Commission.;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.)

Elf Aquitaine was a French oil company which merged with TotalFina to form TotalFinaElf. The new company changed its name to Total in 2003. Elf has been maintained as a major brand of Total.

Part of Equitrans Midstream Corp., Equitrans Gathering Holdings LLC is an American company providing investment services.

Zhuhai Jutal Offshore Oil Services Co., Ltd. engages in the provision of design the complete set of equipment for offshore oil and natural gas mining. It designs natural gas facilities and other metal structures. The company was founded on May 18, 2007 and is headquartered in Zhuhai, China.

Sichuan Jinxing Clean Energy Equipment Co. Ltd. develops, manufactures, sells and services reciprocating piston compressor, LNG and skid-mounted devices. It products include CNG, LNG compressor, natural gas skid-mounted, pressure vessel, engine, electrical control, and engineering installation products. The company was founded in 1995 and is headquartered in Chengdu, China.

Sinopec Petroleum Machinery Co. Ltd. is a company headquartered in Wuhan, China and ultimately controlled by the Government of China, that manufactures and wholesales petroleum engineering equipment. The firm was acquired by Sinopec Oilfield Equipment Corp. from China Petrochemical Corp. on June 18, 2015 for $260.99 million.

Sinopec Petroleum Machinery Co., Ltd. Research Institute, established on 2017-06-01, Business scope includes general items:oil drilling,Oil and Gas Gathering,Ocean engineering,natural gas application,chemical industry,Environmental friendly(Carbon emissions,Carbon conversion and utilization,carbon capture,carbon dust,Industrial Wastewater Treatment),new material,new energy(hydrogen energy,solar energy,Photovoltaic,wind energy)Development and other equipment,device,Development of accessories,manufacture,Wholesale and retail,Leasing and Services;drill,Drilling tool,Manifold,valve,Downhole Tools,R&D of instrumentation and related software,manufacture,Wholesale and retail,Leasing and Services;Longitudinal submerged arc welded steel pipe,Spiral submerged arc welded steel pipe,Straight Seam High Frequency Welded Pipe,Pressure pipe fittings,Development of pressure vessels,manufacture,Wholesale and retail,Anti-corrosion,Coating and Service;Product Quality Inspection,Inspection technology research and development and technical consultation;Import and export of goods and technology(Goods and technologies prohibited or restricted from import and export by the state are not included);Enterprise Management Services,Technical Services;Information Consulting Service(Except for projects subject to approval by law,Carry out business activities independently in accordance with the law with a business license)

Suzhou Oxygen Concentrator Co., Ltd., established on 1997-05-23, Business scope includes design,manufacture,Sales,to develop,Install:Gas separation equipment,Class 1, 2 and 3 pressure vessels,Energy and environmental protection equipment,cryogenic liquid storage tank,Liquefied gas tanker,Chemical machinery,Industrial and mining spare parts and technical consultation,Technical Services;Self-operated and agent import and export of various commodities and technologies.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

China Petroleum Pipeline Bureau Engineering Corp. is a Chinese company ultimately controlled by the Government of China. The firm operates as holding company through its subsidiaries provides pipeline construction services.

Sinopec Petroleum Engineering Design Co., Ltd., established on 2003-04-22, Business scope includes engineering design;EPC;Engineering Management;project consultancy;Engineering Supervision;Engineering cost consultation;Engineering bidding agency;Whole Process Engineering Consulting;Engineering Investigation;Geotechnical Design,Geotechnical Inspection(Supervise)Measurement,Engineering Geophysical Exploration;engineering survey,Surveying and Mapping Geographic Information Services,Oceanographic Mapping,Surveying and Mapping Aerial Photography,Photogrammetry and Remote Sensing;Special equipment production;Scientific research and service,Science and technology promotion,Transformation and transfer of scientific and technological achievements,Research and development of scientific and technological products,to develop,Production,Sales;Environmental Pollution Prevention and Control Engineering;Environmental Engineering Design;Energy-saving engineering design and technology promotion;Information Engineering,software development,computer technology development,Technical Services,Repair and Sales;data collection,storage,to develop,deal with,Service and Sales;Big data service platform construction,Technology Development and Operations;digital content service;Inspection and testing service;Planning and Design Management;Geological disaster management assessment,prospecting,design,supervision;Oil and gas pipeline integrity management;Preparation of environmental impact assessment of construction projects,security evaluation,energy saving assessment,Soil and Water Conservation Program;Business Management Consulting;Production of petrochemical equipment,Sales;Chemical Products(Does not contain dangerous goods),Sales of office automation products;Other printed matter printing(Does not include publication printing);Realtor;Foreign Economic Cooperation Business(Operating with a business qualification certificate);Self-operated and agent import and export of various commodities and technologies,Except for the goods and technologies that the state restricts the company to operate or prohibits the import and export of.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Sichuan Kebike Oil and Gas Engineering Co., Ltd., established on 2008-08-11, Business scope includes general business items(The following scope does not include pre-licensed items,Post-licensing projects operate on the basis of licenses or approval documents) :Engineering survey and design;Activities supporting oil and gas extraction;Professional technical service industry;Technology promotion and application service industry;Software and information technology service industry;Commodity wholesale and retail;Import and export industry;Machinery and Equipment Operating Leases;Special Equipment Design,Special equipment manufacturing(Limited to branch operations) .(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

China Petroleum & Natural Gas Pipeline Engineering Corp. is a Chinese company ultimately controlled by the Government of China. The firm engages in project management services.

MTR is a manufacturing company that develops and produces membrane-based separation systems for various industries. The company offers a comprehensive variety of gas separation systems for petrochemical plants, refineries, and gas processing plants. They are also custom engineered to meet the application and industry.