Chian OAK Oilfield Pipe Manufacturing Co., Ltd

OAK’s product line includes API and non-API grade OCTG, such as casing, tubing, drill pipes, and premium connections, engineered to meet stringent global standards. The company has pioneered the development of proprietary technologies, producing high-performance tubular solutions for extreme downhole conditions. These include deep-well casing for high-pressure/high-temperature (HPHT) environments, thermal recovery casing for steam injection applications, and corrosion-resistant alloys (CRA) for sour service, including H2S and CO2-resistant grades. Additionally, OAK offers low-temperature, high-strength tubulars for arctic and subsea applications.