Chongqing Research Inst of China Coal Tech & Eng Group Corp. is a Chinese company located in Chongqing and ultimately controlled by the Government of China. The firm engages in geological survey and other related operation.

Jineng Holding Equipment Manufacturing Group Co., Ltd., established on 1958-12-31, Business scope includes foreign investment with self-owned funds;Coal wholesale business;engineering survey:control measurement,Topography,Line Engineering Survey,bridge measurement,mine survey,tunnel survey,As-built survey;Cadastral Mapping;Dangerous Goods Transport(1kind1item),Dangerous Goods Transport(3kind);Blasting operation; The following are limited to branch operations: Radio and television program production:cable TV ad;Vocational Education and Training,Vocational skills appraisal;industrial resources,Procurement of mechanical and electrical equipment and accessories,Sales,Rental and Maintenance;Purchase of waste materials;Own space and house lease;Building Construction,construction project:mine construction,Power engineering construction;Installation of electrical facilities,repair,test(Level three);Electric equipment inspection and testing;Installation and maintenance of office automation facilities(Except for special equipment);Communication engineering construction;electricity supply:Electricity sales business;Power business:Power generation business,Transmission business;Electrical equipment and equipment sales;mining of mineral resources:coal mining;coal bed methane mining;Coalbed methane utilization and project construction;Coal washing and deep processing;Forest wood:Business processing;road freight transport;rail freight transport(For coal mine);logistics;Warehousing Services(Hazardous chemicals excluded);Loading and unloading service;chemical industry;Methanol(wood alcohol,wood essence),gasoline,liquefied petroleum gas,sulfur,oxygen(liquid oxygen),nitrogen(liquid nitrogen)production and sales;food production:Dinner service;accommodation service;tree planting;Landscaping project;pharmaceutical production,Drug Wholesale,Drug retail;medical service;Cultural and Office Supplies,Appliance Retail;Material procurement;Own Equipment Rental;Technical Advisory Services;Computer hardware and software development and after-sales service;Import and export,Technology Import and Export;technology development,technology transfer,Technology output,technology licensing,Technical Services,Project development;The company's internal communication private network operation;Communication equipment and equipment sales,Wholesale and retail building materials;Pension service industry;fitness entertainment;commercial service;water,Electricity,Warm domestic wastewater and other logistics services.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Saudi Arabian Oil Co. is engages in the production, transportation, and sale of energy and chemicals. It also offers prospecting, exploring, drilling, extracting, processing, manufacturing, refining and marketing hydrocarbon substances. The company operates through the following segments: Upstream, Downstream, and Corporate. The Upstream segment consists of exploring for, developing and producing crude oil, natural gas and natural gas liquids exploration, field development and production. The Downstream segment includes refining and petrochemical manufacturing, supply and trading, distribution and power generation, logistics, and marketing of crude oil and related services to international and domestic customers. The Corporate segment refers supporting services including human resources, finance and IT not allocated to Upstream and Downstream. Saudi Arabian Oil was founded on May 29, 1933 and is headquartered in Dhahran, Saudi Arabia.

National Oilwell, Inc., is a company which designs, manufactures and markets mechanical components for both land and offshore drilling rigs as well as land drilling and well servicing rigs. The company has it's headquarters in Houston, Texas. It is a subsidiary of National Oilwell Varco, Inc.

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.

Summit Liability Solutions, Inc. provides environmental liability management solutions. Its services include drilling waste management, reclamation and remediation and pre-drilling and pre-acquisition. The company was founded in 2005 and is headquartered in Calgary, Canada.

Xian Research Inst of China Coal Tech & Eng Group Corp. is a company headquartered in Xian, China and ultimately controlled by the Government of China, that engages in geophysical surveying and other related operation.

Nabors Drilling Technologies USA, Inc., a subsidiary of Nabors Industries Ltd., is a company headquartered in Dallas, TX, that provides oil and gas drilling services.

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

Fried. Krupp GmbH, a subsidiary of thyssenkrupp AG, is a company headquartered in Essen, Germany, that offers mechanical engineering services.

Excellon Automation Co. designs and manufactures precision automated drilling, routing and material handling equipment. Its products are used in the fabrication of printed circuit boards. The company provides parts and spindle repair services. The company was founded by Joseph Smith in 1963 and is headquartered in Rancho Dominguez, CA.

Flotek Industries, Inc. engages in the business of creating unique solutions to reduce the environmental impact of energy on air, water, land, and people. It operates through the following segments: Chemistry Technologies (CT), Data Analytics (DA), and Corporate and Other. The CT segment includes developing, manufacturing, packaging, distributing, delivering, and marketing green specialty chemicals that help customers meet their environmental, social, and governance and operational goals and aims to enhance the profitability of hydrocarbon producers. The DA segment focuses on enabling users to maximize the value of their hydrocarbon associated processes by providing real-time data and analytics associated with the streams in seconds rather than minutes or days. The company was founded on May 17, 1985 and is headquartered in Houston, TX.

Huainan Mining (Group) Co., Ltd. principally supplies coal, electricity, and gas. It engages in the mining, washing, preparation, and sales of coal; generation and sales of electricity; as well as utilization of gas. The company was founded in 1930 and is headquartered in Huainan, China.

Diamond T Services, Inc. is a private company headquartered in the United States. The firm engages in rental and leasing of equipments.

Pingdingshan Antaihua Mining Safety Equipment Manufacturing Co., Ltd., established on 2007-10-15, Business scope includes production,Sales:mining products,Industrial and mining accessories and import and export business;Mining product technology research and development,transfer,Consulting and Promotion Services;Repair and maintenance services for mining products.

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.

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.)

Forum US, Inc., part of Forum Energy Technologies, Inc., is an American company specializing in oil and gas field machinery and equipment.

Huaibei Mining Co., Ltd., a subsidiary of Province of Anhui, is a Chinese company that engages in coal mining. On August 04, 2018 Huaibei Mining Holdings Co., Ltd. acquired Huaibei Mining Co., Ltd. from Huaibei Mining (Group) Co. Ltd. for $3,111.90 million.