方钻杆旋塞阀方钻杆旋塞阀是钻柱循环系统中的手动控制阀，是防止井喷的有效工具之一。方钻杆旋塞阀分为上部方钻杆旋塞阀和下部方钻杆旋塞阀两种。上部方钻杆旋塞阀用于水龙头下端和方钻杆上端之间，下部方钻杆旋塞阀用于方钻杆下端和钻杆上端或方钻杆保护接头的上端之间。用专用扳手按指示要求转动操作键90度即可实现开关。在钻井作业中，为避免井喷恶***故的发生，均应在方钻杆上、下两端组接方钻杆旋塞阀。KellyCockValveKellyCockValvewhichisamanualcontrolvalveindrillingstringcyclesystem,isoneoftheeffectivetoolsforpreventingisdividedintoupperkellycockvalveandlowerkellycockvalve.Upperkellycockislocatedatthepositionbetweenlowerendofswivelandthetopofkellystem.Lowerkellycockislocatedatthepositionbetweenlowerendofkellystemanddrillingrodorkellystems***ersub.Withspecialspanneraccordingtoinstructionandrequirementtorolloperationalkey90degree,sothatcanachievetoopenandclose.Inorderto***oidblowout,itshouldbeassembledkellycockvalveontwoendsofkellystem.上部方钻杆旋塞阀技术参数SpecificationofUpperKellyCockValve型号Type外径O.D.(mm)水眼直径WaterHoleDiameter(mm)接头螺纹Connection工作压力WorkingPressure(Mpa)适用范围SuitableRangeCS1461465041/2″REG-LH3570105四方、六方方钻杆TetragonalandHexagonalkellyCS2002007665/8″REG-LH3570105下部方钻杆旋塞阀技术参数SpecificationofLowerKellyCockValve型号Type外径O.D.(mm)水眼直径WaterHoleDiameter(mm)接头螺纹Connection工作压力WorkingPressure(Mpa)适用范围SuitableRangeXS10510541NC313570105四方、六方方钻杆TetragonalandHexagonalKellyXS12112150NC383570105XS12712750NC383570105XS16516561N***63570105XS17817871NC505-1/2FH3570105)