Durable Cementing Tools with Various Plastic Bowl Sizes Rubber Stoppers and Tail Pipe Locking Assemblies Designed for Drilling Operations PS-B type drill pipe stopper Own product line:Cementing Tools Series Product number:RIGE-PS-B The rubber stopper consists of several different sizes of plastic bowls and guides and other components for scraping into the drill. It works well even in a gradient well. After compound with the tailpipe rubber stopper and lock together, wipe the