Daqing Deyouli Machining Co., Ltd.

Daqing Deyouli Machining Co., Ltd. (大庆德优立机械加工有限公司) is an API Monogram-certified machining and manufacturing company based in Daqing, Heilongjiang Province, China. Situated within China's most historically significant oil-producing region, Daqing Oilfield (operated by PetroChina/CNPC), the company manufactures downhole completion equipment for oil and gas well operations. The company holds two API certifications: API Spec 11D1 (license 11D1-0173) for Packers and Bridge Plugs, and API Spec Q1 (license Q1-4296) for Quality Management Systems. These certifications qualify the company to supply API Monogram-stamped packers and bridge plugs for well completion, zonal isolation, and workover operations. Packers and bridge plugs are critical downhole completion tools used to isolate wellbore zones, control fluid flow, and enable staged stimulation or abandonment operations. A patent filed in 2011 (CN202053486U) confirms the company's technical capabilities extend to screw pump stator manufacturing equipment, indicating broader machining competency in production lifting equipment. The company name 'Deyouli' (德优立) reflects quality-oriented manufacturing values common among regional oilfield equipment suppliers serving PetroChina's Daqing Oilfield and neighboring Northeast China oil basins. No public website was identified during research; the company appears to operate primarily within the domestic Chinese oilfield supply chain.