• Hook Blocks

    National Oilwell Varco offers hook blocks in numerous sizes that integrate with dollies and/or top drives for both offshore and land packages.


    • National Oilwell Varco delivers name brand quality in hook block design and equipment.  NOV offers an extensive line of Ideco™ UTB Hook Blocks as well as an extensive line of National™ Type G Hook Blocks. 
    • The Ideco Hook Block design prevents hang-up on tool joint shoulders, racking platforms, or mast girts.  Fabriform Sheaves are standard on every Ideco Block and heavy, steel-plated, hinged sheave guards open quickly and easily for fast reeving.  An automatic safety lock prevents the hook from opening under load, and all weight (including the swivel bail) must be removed and the lock manually released before the hook will open.
    • National Type G Hook Blocks are offered in six load ratings from 175 tons to 650 tons, all in accordance with API yield strength standards.  The Type G Hook Blocks come with a fully universal connection between the hook and block assemblies.  The National Type G Hooks feature a built-in hydraulic snubber, a safety positioner, a convenient rotation lock, and a unique tongue construction.  Each sheave is a one-piece steel casting, assuring longer sheave life and elimination of rim cracks.
    • For more information on hook blocks see the attached UTB Hook flyer, the specifications tab, and/or contact NOV at rig@nov.com  


    • Built in hydraulic snubber eliminates damage to tool joint threads
    • Automatic locking features improve safety and reduce accidents
    • Forged steel and one-piece casting assures a longer sheave life
    • All NOV equipment is backed by comprehensive Aftermarket Services and Support


     National Type G Hook Block specifications:








    # of Sheaves455667
    Sheave O.D., in.354045506060
    Load rating, tons175250350500500650
    Line sizes, in.1 1/8, 1¼1 1/8, 1¼1¼, 1 3/81 3/8, 1½1 3/8, 1½1½, 1 5/8
    Weight, lbs7,92011,60015,26021,25026,50031,780

    For Ideco UTB Specifications, download attached flyer.