Annular Bop Tapered Rubber Sealing for Oil Drilling The product can match and interchange with the equipments of most of the domestic BOP manufactories,(such as Shanghai Shenkai,Huabei Rongsheng,Chuanyou Jingkong,Bao Oil,Jiangsu Xinde,Jiangsu Sanyi etc);After the application in the oil fields over the years, it has been proved that all the technical requirements and performance of our products can reach the standards of and be interchangeable with the products of Hydril. It can be customized according to customers' specific requirements of temperature, pressure and environment conditions. Temperature Range:Normal Conditions:-18ºC-121ºC Special Case:-45ºC-180ºC. Product Description …