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

    Junk Subs

    Junk Subs

    Catch down-hole debris with the junk sub basket and use the fishing magnet to retrieve that lost roller cone or cutters out of the hole.

    Junk Subs, which are normally run just above the drill bit, have a cup for catching objects too heavy to be completely circulated out of the hole. 
    This is particularly advantageous in junk milling operations. By running a Junk Sub above a scraper, operators can get quicker, cleaner scraping jobs.

    Junk Subs are constructed from high quality steel, completely stress-relieved after cup and rib guides have been welded to the main body. 
    Rib guides prevent the cup from becoming crushed and help guide the tool through tight places upon withdrawal from the hole. Junk Subs are available in standard, long and extra long types.

     

     

    Type

    Hole Size Range
    (mm/inch)

    Max. O.D.
    (mm/inch)

    Sub O.D.
    (mm/inch)

    I.D.
    (mm/inch)

    Connection
    API

    SLB127

    152.4~161.9(6~6-3/9)

    127(5)

    114.3(4-1/2)

    38.1(1-1/2)

    3-1/2REG

    SLB168

    190.5~215.9(7-1/2~8-1/2)

    168(6-5/8)

    146(5-3/4)

    57.2(2-1/4)

    4-1/2REG

    SLB175

    219~244.5(8-5/8~9-5/8)

    175(6-57/64)

    146(5-3/4)

    57.2(2-1/4)

    4-1/2REG

    SLB245

    292.1~330.2(11-1/2~13)

    244.5(9-5/8)

    203.2(8)

    71.4(2-13/16)

    6-5/8REG

    SLB330

    374.7~444.5(14-3/4~17-1/2)

    330(13)

    241.3(9-1/2)

    76.2(3)

    7-5/8REG

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