1.The valve is made with easily drillable metal material. PDC drillable. 2.Excellent performance for flow endurance and back pressure holding. 3、Available in ball valve type and spring-loaded valve type.

1、Designed with side ports and bottom blades for liner job. 2、The valve is made with phenolic material and molded with high strength concrete. Both the valve and concrete are easily drillable. 3、Excellent performance for flow endurance and back pressure holding. 4、Single valve and double valve versions are available.

1、Used for the inner string cementing of large diameter. Displacement volume and cementation time are reduced and cementing operation is safer. 2、The valve is made with phenolic material and molded with high strength concrete. Both the valve and concrete are easily drillable. 3、After the stinger stabs into the seat, reliable sealing is achieved. 4、Single valve and double valve versions are available.