Float Valve (Flapper Type Check Valve) This Float Valve is normally installed in a standard bore-back of the bit sub, to provide fluid flow control at the bottom of the drill stem. It also prevents backflow of cuttings from plugging the drill bit jets while making...

The Kelly splash-proof valve is a necessary tool preventing fluid flowing from Kelly to drill floor and keeping the operating en The Kelly splash-proof valve is a necessary tool preventing fluid flowing from Kelly to drill floor and keeping the operating environment from being...

The Inside Bop is a heavy-duty drop check valve with a conical plug to reduce the cutting action of the mud on the valve seat, e The Inside Bop is a heavy-duty drop check valve with a conical plug to reduce the cutting action of the mud on the valve seat, ensuring positive closure...

Arrow Type Check Valve used to be installed between drill stem and bit to prevent drilling fluid backflow from the bottom Arrow Type Check Valve used to be installed between drill stem and bit to prevent drilling fluid backflow from the bottom. The body is a crossover sub in which...

The drop-in check valve is used to control back flow from high pressure formations. It allows downward fluid circulation with th Drop-in check valve is an internal preventer. When blowout is going to happen, the Kelly should be removed immediately and the check pressure valve...