Float shoe、Float collar
Thefloatcollarismainlycomposedofspoiler,floatingball,shellandthebasket.Thecasingfloatshoeismainlycomposedofspoiler,floatingball,shell,thebasketandguideshoe.Theconeofspoilercenterholewithfloatingballcansealfluidreverse.Thebasketcansupportfloatingball,flushwellcycleandadjustperformanceofthedrillingfluid.Whencementingjob,thebasketsupportthefloatingballandfloatcollarisintheconductionstate,sofluidcanpassthroughfreely.Floatcollarisback-pressureafterrunningcasingandtheendofcementingjob.Floatingballwithsealingfaceofspoilercanpreventfluidbackflow.
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