-Back pressure valve (BPV) falls in two types, one-way and two-way type. The one-way BPV allows downwards flow of drill fluids but prevent them go upward.
-To test X-mas tree above tubing hanger, two-way BPV is needed.
-BPV adopts special short buttress thread, which features high strength and long service time.
-BPV could be assembled and disassembled by using a special tool, which guarantees quick and safe operation of pressure control.