China Oilfield Services (OTCMKTS:CHOLF) (OTCMKTS: CHOLF) is a leading oilfield services provider and a subsidiary of China National Offshore Oil Corporation (CNOOC). The company delivers a comprehensive range of services to upstream oil and gas operators, with capabilities spanning well drilling, logging, completion, testing, workover, and production optimization. Through its integrated service model, China Oilfield Services supports both onshore and offshore exploration and development projects, catering to a broad spectrum of hydrocarbon recovery needs.
At the core of its operations, China Oilfield Services maintains a fleet of drilling rigs—comprising jack-up rigs, semi-submersibles and drillships—as well as well intervention vessels and marine geophysical survey ships. The company’s portfolio also includes specialized equipment for directional drilling, measurement-while-drilling (MWD), logging-while-drilling (LWD) and wireline logging services. These technical offerings are complemented by digital oilfield solutions aimed at enhancing reservoir characterization, real-time monitoring and production efficiency.
Since its establishment in 2000 and public listing on the Hong Kong Stock Exchange in 2001, China Oilfield Services has expanded its footprint beyond China’s offshore fields to serve markets in Southeast Asia, the Middle East, West Africa and Latin America. By forging strategic partnerships and joint ventures, the company has secured long-term service contracts with national and international oil companies. Its global presence is underscored by a network of regional offices, service bases and logistics hubs that support rapid mobilization and local compliance.
Headquartered in Beijing, China Oilfield Services operates under a management team with deep industry experience and benefits from the financial and technical backing of parent company CNOOC. The firm continues to invest in research and development, focusing on environmentally responsible drilling practices and low-carbon solutions such as enhanced oil recovery techniques and emissions-reduction technologies. This commitment positions China Oilfield Services as a pivotal partner for energy producers navigating the evolving demands of the global oil and gas sector.
