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

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.

Part of Schlumberger NV, Schlumberger Technologies, Inc. is a company headquartered in Moorestown, NJ, that provides oilfield services such as distributing oil and gas information technologies and providing consulting services.

Ardyne Holdings Ltd. is a British private company located in Aberdeen. The firm provides professional, scientific and technical activities. It was founded in 2015.\nThe company says this about itself: Ardyne Holdings Limited's (\"Holdings\", \"the company��) principal activity is that of an investment holding company. The principal activity of Ardyne Holdings Limited and its subsidiaries (\"the Group��) is the provision of bottom hole assembly (BHA) tools and services to wells in late-life (\"Brown-Field\") and plug and abandonment (P&A) operations in the global oil and gas sector.

Schlumberger Technology BV, a subsidiary of Schlumberger NV, is a Dutch company located in The Hague. The firm provides gas and oil exploration services.

Specialised Petroleum Services Group Ltd. provides well-bore clean-up products and services for the offshore market. The company is headquartered in Westhill, the United Kingdom.

Weatherford International LLC, part of Weatherford International plc, is an American company located in Houston, TX, focused on drilling oil and gas wells.

12th Research Institute of China Electronic Tech Group Corp. (doing business as China Electronic Technology Group Corporation No.12), a subsidiary of China Electronic Technology Group Corp., is a company headquartered in Beijing, China. The firm provides research services for electronic technology.

Daqing Oilfield Co., Ltd. Testing Technology Service Branch, established on 2000-04-28, Business scope includes and logging,Perforation,Research and development of geophysical technology related to wireline operations such as well testing,consult,Transfers and Services;Logging,well test,test,Design and construction of detection device,Logging,Detection and Calibration of Well Testing Instruments;Logging,well test,Manufacture of testing instrumentation and general instrumentation,Sales and Service,Research and development of computer application technology and software,road general cargo transportation.

Probe Technology Services, Inc. designs, manufactures, and sells measurement tools and systems used in formation evaluation, and well integrity assessment and productivity determination for the energy industry worldwide. It offers cased hole tools, such as corrosion logging, cement integrity logging, thru casing evaluation logging, gamma ray and CCL logging, memory logging, surface acquisition systems, and auxiliary equipment and accessories; and open hole tools, including nuclear, resistivity, acoustic, and borehole geometry logging. The company was founded in 1994 and is headquartered in Houston, TX.

GOWell International LLC, a subsidiary of GOWell Petroleum Equipment Co., Ltd., is a company headquartered in Houston, TX. The firm provides oil and gas support services.

Hangzhou Ruili Sound and Electric Technology Co., Ltd., established on 1992-09-09, Business scope includes general items:Production:Petroleum logging instrument,Electrical and automation instrumentation(Demetering),Ultrasound equipment,Underwater Acoustic Equipment,Physical Prospecting Equipment,Piezoelectric materials and components,Computer and Building Intelligent System,air purification system;technology development,Technical Services,technical consulting,Achievement transfer:Petroleum logging instrument,Electrical and automation instrumentation(Demetering),Ultrasound equipment,Underwater Acoustic Equipment,Physical Prospecting Equipment,Piezoelectric materials and components,Intelligent Building,smart transportation system,Computer hardware and software,air purification system;Sales,lease:Petroleum logging instrument,Electrical and automation instrumentation(Demetering),Ultrasound equipment,Underwater Acoustic Equipment,Physical Prospecting Equipment,Piezoelectric materials and components,Computer hardware and software;undertake:Electronics and Intelligent Engineering,Computer Information System Integration Engineering,Intelligent Transportation Engineering,Energy saving and environmental protection project(Operate with qualifications);Install,debugging:Self-produced products and supporting equipment;Import and export of goods or technology(Except for the import and export of goods and technologies that are prohibited by the state or involve administrative approval)(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)(Except for projects subject to approval by law,Carry out business activities independently in accordance with the law with a business license).

Dresser Industries, Inc. was a supplier of products and services to industries involved in oil and gas production and transmission, petroleum refining and marketing and power generation. The petroleum products and services segment used to provide services and project management for oil and gas exploration, drilling, completion, production and transmission activities. In 1998, the company merged with its main rival, Halliburton, and is now known as Halliburton Co. On 10th April, 2001 the Dresser division (excluding the former Kellogg division) entered an agreement to separate itself once again from Halliburton by management purchasing its equity, the new company to be called Dresser, Inc. The company is headquartered in Dallas, TX.

Ardyne Technologies Ltd. provides oilfield services. It develops and supplies technology and services to the global energy industry, focusing on reducing rig time spent on downhole casing removal in slot recovery and re-entry, workover, and plug and abandonment operations. The company is headquartered in Aberdeen, the United Kingdom.

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.

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.

China Petroleum Logging Co. Ltd. is a company headquartered in Beijing, China and ultimately controlled by the Government of China, that provides wellbore technical services includes logging, cable completion logging, engineering logging, perforating, testing and related services.

Jiangsu Weijie Stone Energy Technology Co., Ltd., established on 2016-11-18, Business scope includes energy technology research and development;Special equipment for oil drilling,Natural gas liquefaction equipment,Construction machinery and accessories,Agricultural machinery and accessories,Instrumentation,steel,Labor protection supplies,household appliances,electronics,Chemical Products,Sales of downhole tools,lease;Design of Environmental Engineering,construction;Well Drilling Construction;Downhole Tools,Special equipment for oil drilling,Green facilities,Construction machinery maintenance;Self-operated and agent import and export business of various commodities and technologies(Except for commodities 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) General project:Technical Services,technology development,technical consulting,Technology Exchange,technology transfer,Technology Promotion;Geological Exploration Technical Services;Special Equipment Repair;Engineering Management Services;Sales of high-performance fibers and composite materials;Sales of engineering plastics and synthetic resins;Synthetic Materials Sales;Sales of special equipment for geological exploration;Non-ferrous metal alloy sales;Machinery sales;Sales of high-performance sealing materials;Sales of special instruments for geological exploration and seismic;Rubber Products Sales;Metal Tool Sales;Mechanical Parts,Parts sales;Wholesale of electronic components;Sales of plastic products;bearing,Gear and transmission parts sales;Metalworking machinery manufacturing;Manufacturing of special equipment(Manufacture of licensed professional equipment not included);Instrument Manufacturing(Except for projects subject to approval by law,Carry out business activities independently in accordance with the law with a business license)

Xi'an Zhongying Huachuang Petroleum Technology Co., Ltd., established on 2019-10-24, Business scope includes research and development:electronic product;Instrumentation,aerospace equipment,Development of industrial automation equipment,Sales,Install,repair,technical consulting,Technical Services;petroleum engineering(Does not contain flammable and explosive dangerous goods,monitor,precursor chemicals)the design of,construction,Technical Services;Computers and Peripherals,Chemical Products(Does not contain flammable and explosive dangerous goods,Monitoring Precursor Chemicals),photographic equipment,welding equipment,Electronic Component,Wire and Cable,household appliances,Labor protection supplies,Sales of office automation equipment;Import and export business of goods and technology(Except for goods and technologies that are prohibited or restricted from import and export by the state);leasing of instruments.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)