Place of origin:
China
Price Condition:
FOB
Size:from 4 1/2" to 20"
Thread:BTC,LTC,STC
Grade:k55,J55,N80,P110
Single or double valve
Float collar and float shoe are necessary conventional accessories for down---structure of casing string.The features are as follow:
(1)Inside structure are aluminum alloy,easy for drilling;
(2)Can be connected with same type casing directly;
(3)Reliable backpressure sealing structure,minimum resistance fo
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