- Business
- China Oilfield Services Limited, along with its affiliated entities, delivers comprehensive offshore oilfield solutions across China and to clients globally. The enterprise organizes its operations into four principal divisions: Drilling Services, Well Services, Marine Support Services, and Geophysical Acquisition and Surveying. The Drilling Services segment encompasses both offshore and onshore drilling operations, providing services for jack-up rigs, semi-submersible rigs, modular rigs, and land drilling rigs, alongside casing, tubing, and pipe inspection and repair. This division manages a substantial fleet, including 27 jack-up drilling rigs, 5 semi-submersible drilling rigs, 4 modular rigs, and 6 land drilling rigs, among others. The Well Services division offers a variety of specialized support for wells, covering logging, drilling and completion fluids, directional drilling, cementing, well completion, workover, stimulation, and production optimization for both onshore and offshore sites. The Marine Support Services segment facilitates anchor handling, towing for drilling rigs and engineering barges, oil transport, offshore logistics, standby support, firefighting, rescue, and oil spill assistance. It operates a diverse fleet of over 60 specialized vessels, including anchor-handling tug/supply vessels, platform supply vessels, multi-purpose vessels, barges, and shuttle tankers. The Geophysical Acquisition and Surveying Services segment undertakes marine seismic data collection, offshore geological surveying, seismic data processing and interpretation, and underwater engineering activities. This segment deploys dedicated seismic and engineering surveying vessels for its operations. Headquartered in Sanhe, China, the company is a subsidiary of China National Offshore Oil Corporation. COSL has expanded its international footprint significantly, securing contracts and pursuing opportunities in regions such as Southeast Asia, the Middle East, Africa, Europe, and the Americas. Recent achievements include robust financial performance in Q3 2025, with revenues reaching $11.53 billion, and substantial growth in overseas technical contracts. The company also actively invests in technological advancement and sustainable practices, aiming for a 25% reduction in carbon emissions by 2030 and net-zero emissions by 2030.