Locking Couplings

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    Trenchless and Technical Drilling Fluids & Additives

    Locking Couplings

    Di-Corp offers a full line of Locking Couplings to complement our line of Core Retrieval Tools. Extensive field testing and development of these products have concluded that product performance has exceeded customer expectations. Drillers Edge Locking Couplings offer:

    • Precision machined threads for all common thread forms, including the new S-Maxx design.
    • Sizes available include B, N, H and P.
    • Outer tubes are available in 5-foot (1.5 m) and 10-foot (3 m) lengths. Full hole outer tubes are compatible for use with extended core barrels.
    • Locking couplings are available with or without the tang.

    Features & Benefits

    • Increased contact area reduces hole deviation and improves hole target accuracy.
    • Reduced in-hole vibration provides increased core barrel stabilization.
    • Fully compatible with all existing core barrel components.
    • Wear resistant locking coupling latching surface.
    • Performs well in soft, medium, and very hard formations, as well as fractured and competent ground conditions.
    • Wide range of applications.

    Full Hole Locking Couplings Benefits

    Full hole locking couplings have some features and benefits unique to their design, including:

    • Three flat geometry provides a straighter outer tube, increasing core barrel stabilization.
    • Exceptionally long life through high-quality alloy steel.
    • Precision extruded geometry ensures product consistency.
    • Locking couplings outer surface is heat-treated for improved wear resistance.

    B Sizes Available

    N Sizes Available

    H Sizes Available

    P Sizes Available

    Part Number Description
    100961 LOCKING COUPLING, PD FULL HOLE w/ TANG
    101625 LOCKING COUPLING, PD FULL HOLE NO TANG
    Part Number Description
    101541 LOCKING COUPLING, PD CONVENTIONAL w/ TANG
    101543 LOCKING COUPLING, PD CONVENTIONAL NO TANG

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    Frequently Asked Questions

    What are locking couplings used for?

    Locking couplings lock the head assembly of a core barrel to the drill rod, serving as an adapter between the core barrel outer tub and the rod. In addition, locking couplings also provide stabilization of the upper part of the core barrel, which minimizes deviation while drilling, acting as a backup to the reaming shell.

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