Jiangsu Wellhead Drilling Equipment Co., Ltd. (formerly: Yancheng Wilder Petrochemical Machinery Co., Ltd.) is engaged in drilling equipment and valve production of professional manufacturers, is a network member of PetroChina and Sinopec supplies and equipment (Group) Corporation, through the ISO9001 international quality system certification, and won the American Petroleum Institute API 6a, API 6D, API, API 7K, API 16a, API 16C certificate and Monogram use rights. The company has engaged in petroleum machinery manufacturing industry for many years of....