Chinese oil drilling equipment manufacturing. It is awarded API 4F, 7K, 8A. Has developed 8 series and more than 230 types products owning the core competitiveness, such as hot washing truck, truck-mounted drilling rig and workover rig, cementing truck, swabbing truck, series drilling rigs (≤ 7000m). Dewaxing truck is awarded as national new .. pany Overview of China Manufacturer - Puyang …Puyang Zhongshi Group Co., Ltd, was founded in 1997, manufactures a full line of Casing Cementing Equipments, with API 5CT, 6A, 11AX, 11E and ISO 14001, 9001Certificates in China. We have 9 factories, more than 500 employees, and many kinds of production equipments. We have certificates of API 5CT, 6A, 11AX, 11E, ISO 14001 and 9001.