钻杆浮阀一般连接在钻头之上，主要用来防止井涌或井喷的发生。另外在不需要下入工具时，还可以作为配合接头来使用。实际上钻杆浮阀就是个单向阀，它不阻碍泥浆的正循环，但能阻止井涌或井喷。减少泥浆的损失和保持钻台的清洁。DrillPipeFloatValveTheZFFTypeFloatValveisonekindofunidirectionalcheckvalvewhichcanbeusedinpreventingfromblowoutandwellkicktoreducelossofdrillingfluidandkeeptherigfloorclear.Drillpipefloatvalvec***istsofthebodyandthefloatvalveassembly.Thefloatvalveassemblyisinstallenintothebodywhenusing(seaschema3).Thefloatvalveassembly(seaschema1andschema2)includescage,valve,valveseladisk,spring,sideseal,valveseal,valveguide,valverodetc.whentheassemblyisnotworking,thebackpressureactionofspringmakeitclosed.Thevalveisopenedascirculatingmuddownwardandthemudcanflowthroughit.Thevalveisclosedasthereisthebackpressure.钻杆浮阀技术参数SpecificationofDrillPipeFloatValve型号Type外径O.D.(mm)耐回压BearingBackPressure连接扣型Connection连接钻铤规格DrillPipe(in)ZFF127φ12735MPa70MPaNC38×NC385″ZFF159φ15935MPa70MPaN***6×N***661/4″ZFF165φ16535MPa70MPaNC50×NC5061/2″ZFF178φ17835MPa70MPaNC50×NC507″ZFF203φ20335MPa70MPa65/8REG×65/8REG7″ZFF228.6φ228.635MPa70MPa75/8REG×75/8REG9″ZFF241φ24135MPa70MPa75/8REG×75/8REG91/2″)