Float Valve (Flapper Type Check Valve) This Float Valve is normally installed in a ... provide fluid flow control at the bottom of the drill stem. It also prevents backflow of cuttings from plugging the drill ... -1/2IF431.8121.44298.45122.247-5/8REG431.8 Drill stem tools,Coring tools ,Fishing tools,Jars tools,Cementing tools,Milling ...