方钻杆自动防漏阀方钻杆自动防漏阀接在方钻杆下端，用以防止方钻杆内的钻井液溅出而污染钻台和恶化操作环境。在钻井及接单根过程中，使用方钻杆自动防漏阀可以节省钻井液。另外，本工具还具有操作简便、工作可靠，以及由于主要部位采用耐磨材料，因而耐冲刷、使用寿命长等优点。KellyautomaticleakproofvalveKellyautomaticleakproofvalveisconnectedtolowerendofkellysoastopreventplatformandoperatingenvironmentbeingpollutedbysplashingdrillingfluid.Duringdrillingandconnectingwithsingle,usingthisvalvecans***edrillingfluid.Otherwise,thetoolh***eeasyoperationandreliablecauseofitsabrasivematerialinmainpart,thetoolresistenttowash.Theservicelifewillbeprolonged.Kellyautomaticleakproofvalveismadeof1)jointbodyandleakproofvalveunit.2)valvedisk3)valvebody4)alloyseat5)valvepiston6)sunkscrew7)alloysleeve8）valvebody9)valvebarrel10)spring11)rubbermat12)valvebar,figure方钻杆自动防漏阀技术参数SpecificationofKellySplashValve型号Type外径O.D.mm(in)内径I.D.mm(in)接头螺纹JointThreadFJF102102(41/32)38(11/2)NC31FJF146146(53/4)45(13/4)NC38FJF159159(61/4)50(2)NC50FJF165165(61/2)50(2)NC50FJF178178(7)57(21/4)NC50FJF184184(71/4)57(21/4)NC50FJF190190(71/2)70(23/4)NC50FJF200200(77/8)70(23/4)NC50FJF210210(81/4)70(23/4)NC50)