BACK PRESSURE VALVE (INSIDE BOP/ GRAY VALVE) is a heavy-duty drop check valve that is positioned in the drill string to control formation pressure during kicks. It controls the backflow through the inside of the drill pipe itself, preventing damage to the swivel, drilling hose, standpipe and circulation equipment. During normal circulation of drilling fluids down the drill pipe, the valve remains open to permit the flow through it. A conical plug, or dart, minimizes the erosive action of the drilling fluid on the valve seat and assures a long lasting seal between the valve dart and valve seat.When any backflow occurs, the valve closes automatically to contain it, protecting the drilling equipment as well as controlling the kick that could otherwise lead to a blowout.
Ball Type Full Opening Safety Valve is designed to be stabbed into the top joint of drill pipe or tubing at the rig floor and closed quickly in case a well kicks. After weight material is added to the mud, the Kelly can be reconnected, the safety valve opened, and circulation initiated.
Like the Kelly valve, the Safety Valve is full opening. The ball-type design permits the valve to be compact, easy to handle, and yet have great strength. Standard test pressure is 10,000 pounds, but higher pressure ratings are available.
Description: Full Opening Safety valve is a manual control ball type safety valve used to stop flow through the drill string. FOSV assembled between lower Kelly sub and upper drill pipe sub. In the drilling operation, in order to avoid malignant accidents, the FOSV shall be connected between drill pipes in drilling process. It can be opened or closed off by simply turning a special operating wrench 90° according to indicated direction.
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safety relief valve DN 20 valve body bronze valve seat and spring brass operating temperature -200 ------+250
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Bronze Safety Valve Rating : Max. BOP 250 PSIG (17.24 Bar) at 435° F (225 C), Set Pressure 250 PSIG Material : Bronze Description : Angle Pattern, Pop Type, Enclosed Dischage Ends : Flanged Specials : IBR Item Code : BM000013 Size : 15mm Notes : Available Valve Size : 15mm to 80mm
Bronze Safety Valve Rating : Max. BOP 250 PSIG (17.24 Bar) at 435 F (225 C), Set Pressure 250 PSIG Material : Bronze Description : Angle Pattern, Pop Type, Enclosed Dischage Ends : Inlet Screwed Male, Outlet Screwed Female Specials : IBR Item Code : BM000012 Size : 15mm Notes : Available Valve Size : 15mm to 80mm
