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  1. Unionlever (Group) Petroleum Equipment Co.,Ltd.

    Float Valves(Flapper Type Check Valve)
     

    Float Valve (Flapper Type Check Valve) & Float Valve Sub

     

    This Float Valve is normally installed in a standard bore-back of the bit sub, to provide fluid flow control at the 
    bottom of the drill stem. It also prevents backflow of cuttings from plugging the drill bit jets while making connections. 

    Type

    Dia. of Valve Assembly
    mm
    inch

    Length Of Valve Assembly
    mm(inch)

    Dia. Of Float Recess
    mm(inch)

    Sub Box

    Other Popular Connections

    Connection
    API

    Depth Of Recess
    mm(inch)

    Connection
    API

    Depth Of Recess
    mm(inch)

    1R

    42.1(1-21/32)

    149.2(5-7/8)

    42.9(1-11/16)

    2-3/8Reg.

    231.8(9-1/8)

    NC23

    231.8(9-1/8)

    2F-3R

    61.1(2-13/32)

    165.1(6-1/2)

    61.9(2-7/16)

    3-1/2Reg.

    266.7(10-1/2)

    NC31

    260.35(10-1/4)

    3-1/2 F

    79.4(3-1/8)

    254(10)

    80.2(3-5/32)

     

     

    NC38

    362.0(14-1/4)

    4R

    88.1(3-15/32)

    211.1(8-5/16)

    88.9(3-1/2)

    4-1/2Reg.

    325.4(12-13/16)

    NC44

    331.8(13-1/16)

    5R

    98.4(3-7/8)

    247..7(9-3/4)

    99.2(3-29/32)

    5-1/2Reg.

    374.7(14-3/4)

    NC50

    368.3(14-1/2)

    5F-6R

    121.4(4-25/32)

    298.5(11-3/4)

    122.2(4-13/16)

    6-5/8Reg..

    431(17)

    5-1/2IF

    431.8(17)

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