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

ConocoPhillips Co. explores, produces, refines, and wholesales oil and natural gas. The company is headquartered in DE.

BGP, Inc. offers geophysical survey and other services. The main business of BGP includes onshore, offshore, TZ seismic data acquisition; seismic data processing and interpretation; reservoir geophysics; borehole seismic surveys and micro-seismic; geophysical research and software development; GME and geo-chemical surveys; geophysical equipment manufacturing and multi-client services. The company was founded in 2002 and is headquartered in Zhuozhou, China.

Tiandi Science & Technology Co., Ltd. engages in the manufacture and sale of electronic products, environmental protection equipment, mining mechanical and electrical products, and scientific research products. It operates through the following business segments: Coal machinery, Safety equipment, Coal sales, Technology projects, Engineering projects, and Environmental protection equipment. Its services include underground engineering technology development, project design and contracting, enterprise management, construction project management, and development of technology related to mine construction, freezing, grouting, and drilling. The company was founded on March 24, 2000 and is headquartered in Beijing, China.

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.

Powerchina Guiyang Engineering Corp. Ltd. is a Chinese company located in Guiyang and ultimately controlled by the Government of China that provides hydraulic engineering services.

Yunnan Aerospace Engineering Geophysical Detecting Co., Ltd. engages in the provision of safety and quality management services throughout the entire life cycle of projects. It provides 3D survey, fine inspection, real-time monitoring, consulting, information development and application services. The company was founded in 1999 and is headquartered in Kunming, China.

China Railway Construction Bridge Engineering Bureau Group Second Engineering Co., Ltd., established on 2005-07-20, Business scope includes general business items:Sales of construction machinery;Construction machinery and equipment rental;Sales of building materials;Manufacture of concrete structural components;Sales of concrete structural components;rental service(Licensed rental services not included);housing lease.(Except for projects subject to approval by law,Carry out business activities independently in accordance with the law with a business license),The licensing program is:Construction Engineering Construction;Construction labor subcontracting;construction professional work;Blasting operation;property management.(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)

Changcun Coal Mine of Shanxi Lu'an Environmental Protection Energy Development Co., Ltd., established on 2002-07-04, Business scope includes mining of mineral resources:coal mining.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Powerchina Chengdu Engineering Corp., Ltd. provides planning and consultancy, investigation and design, engineering and construction, as well as investment and financing services in clean energy, water, infrastructure, and other fields. The company was founded in 1950 and is headquartered in Chengdu, China.

China Coal Research Institute is a company headquartered in Beijing, China and ultimately controlled by the Government of China, that operates coal mines, engages in geological surveying and manufactures and distributes coal mining-related equipments and bi-products.

Powerchina Huadong Engineering Corp. Ltd., a subsidiary of Power Construction Corporation of China, Ltd., is a company headquartered in Hangzhou, China, that provides industrial engineering services.

Beijing Mineral Geology Research Institute Co., Ltd., established on 2004-07-22, Business scope includes earth science research;Rent out your own office space;computer graphic design,make;Conference Services;type,copy service;Data editing;Technical extension services;Operation of water pollution control facilities;Undertake exhibition and display activities;property management;Organize cultural and artistic exchange activities(without show);software development;Engineering and Technology Studies;Educational Consulting;Soil Pollution Control;Operation of Pollution Control Facilities;Geographic Remote Sensing Information Service;Environmental Assessment Services;Industrial and mining enterprise wastewater monitoring service;Inland Water System Pollution Monitoring Service;Ecological resource monitoring service;Planning and Design Management;Land Planning Services;Mineral Resource Exploration;Geological Prospecting;engineering design;Engineering Investigation;Mapping service.(Market entities independently choose business projects in accordance with the law,Carry out business activities;Mineral Resource Exploration,Geological Prospecting,Mapping service,Engineering Investigation,Engineering design and projects subject to legal approval,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 industrial policies of the state and this city.)

China Metallurgical Communications Construction Group Co., Ltd., established on 2005-12-26, Business scope includes real estate development;technology development,technology transfer,technical consulting,Technology Promotion,Technical Services;Transportation Engineering Investment Management;Construction General Contracting,Professional contractors;project consultancy,Engineering Supervision,Bidding agency;Import and export,Technology Import and Export,Agent import and export;Provide labor services(No intermediary services);Contract overseas transportation construction projects and domestic international bidding projects;Equipment required for the above overseas projects,Material export;Dispatch labor personnel required for the implementation of the above-mentioned overseas projects;Survey and design;building materials,Engineering quality inspection and experiment;Sales of machinery and equipment;Machinery and Equipment Leasing;road management,conservation.(Market entities independently choose business projects in accordance with the 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 industrial policies of the state and this city.)

China Railway Construction Bridge Engineering Bureau Group Third Engineering Co., Ltd., established on 2003-01-08, Business scope includes railway engineering,Road construction,building engineering,mine engineering,Municipal public works,bridge engineering,tunnel Engineering,Road subgrade engineering,Railway track laying and girder engineering,Earthwork construction,General cargo,Dedicated transport of goods(tank);Building Material Testing Services,Machinery and equipment leasing and sales,Sales of building materials(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

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.

Joy Global Underground Mining LLC, a subsidiary of Komatsu Ltd., is a company headquartered in Milwaukee, WI, that manufactures and services high productivity mining equipment.

China Coal Science and Industry Mining Research Institute Co., Ltd., established on 2020-04-26, Business scope includes engineering and technology research and experimental development;technology development,technical consulting,Technology Exchange,technology transfer,Technology Promotion,Technical Services;software development;business management;Import and export;Technology Import and Export;Engineering Management Services;Planning and Design Management;Industrial Design Services;Professional Design Services;Engineering Survey Activities;Basic geological survey;Geological Exploration Technical Services;Geological disaster management service;Manufacture of special instruments for geological exploration and seismic;Sales of special instruments for geological exploration and seismic;Manufacture of electronic components and equipment;Manufacture of electromechanical components and equipment;Manufacture of electrical instruments and meters;Production Instrumentation,Equipment,Chemical Products(No licensed chemical products)(Restricted to engage in production and business activities in other cities);Sales of electronic components,Electrical Equipment,Instrumentation,Equipment,computer,Software and Auxiliary Equipment,Chemical Products(Does not contain dangerous chemicals and a class of precursor chemicals);Maintenance Special Equipment,Instrumentation;Labor subcontracting;Mapping service;engineering design;Construction General Contracting,Professional contractors;Engineering Investigation.(Market entities independently choose business projects in accordance with the law,Carry out business activities;Mapping service,engineering design,Construction General Contracting,Professional contractors,Engineering survey and projects subject to approval according to 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 industrial policies of the state and this city.)