The Well Cementing Tool of Stop Collar Shijiazhuang DiBo Petroleum Machinery Co., Ltd. Base Info Model NO.:DB9035Certification:ISO 9001:2008Surface Treatment:Spray-PaintStructure:SliderType:DV CollarTrademark:DBpetroTransport Package:Wooden CaseSpecification:4 1,2"-20"Origin:China Description Pre:API Casing and Tubing Screw Rigid Centralizer for Cementing Tool Next:Non-Weld Semi Rigid Centralizer The Well Drilling Cementing Tool