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Double Tube Core Barrel NQ 3.0 Meters For Mining Exploration Core Drilling

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    Buy cheap Double Tube Core Barrel NQ 3.0 Meters For Mining Exploration Core Drilling from wholesalers
     
    Buy cheap Double Tube Core Barrel NQ 3.0 Meters For Mining Exploration Core Drilling from wholesalers
    • Buy cheap Double Tube Core Barrel NQ 3.0 Meters For Mining Exploration Core Drilling from wholesalers
    • Buy cheap Double Tube Core Barrel NQ 3.0 Meters For Mining Exploration Core Drilling from wholesalers
    • Buy cheap Double Tube Core Barrel NQ 3.0 Meters For Mining Exploration Core Drilling from wholesalers

    Double Tube Core Barrel NQ 3.0 Meters For Mining Exploration Core Drilling

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    Brand Name : ROSCHEN
    Model Number : ROS
    Certification : ISO,CE
    Price : Negotiate
    Supply Ability : 1000 sets
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    Double Tube Core Barrel NQ 3.0 Meters For Mining Exploration Core Drilling

    Double tube core barrel NQ 3.0 meters for Mining Exploration Core Drilling


    Coring In-Hole Tools

    CORE BARRELS, BITS, RODS, CASING AND TOOLS

    Roschen offers a variety of high quality coring drilling systems which include core barrels, core diamond drill bits, drill rods, casings and more.

    Exploration diamond drilling is used in the mining industry to probe the contents of known ore deposits and potential sites. By withdrawing a small diameter core of rock from the orebody, geologists can analyse the core by chemical assay and conduct petrologic, structural and mineralogical studies of the rock.



    Rodolphe Leschot is often cited as being the inventor of the first core bit in 1863. Early diamond drilling opened up many new areas for mineral mining, and was related to a boom in mineral exploration in remote locations. Before the invention of the portable diamond drill, most mineral prospecting was limited to finding outcrops at the surface and hand digging. In the late 1970s, General Electric pioneered the technology of polycrystalline diamond compacts (PDCs) as a replacement for natural diamonds in drill bits.


    Exploration diamond drilling differs from other geological drilling (see Drilling rig) in that a solid core is extracted from depth, for examination on the surface. The key technology of the diamond drill is the actual diamond bit itself. It is composed of industrial diamonds set into a soft metallic matrix. As shown in the figure, the diamonds are scattered throughout the matrix, and the action relies on the matrix to slowly wear during the drilling, so as to expose more diamonds. The bit is mounted onto a drill stem, which is connected to a rotary drill. Water is injected into the drill pipe, so as to wash out the rock cuttings produced by the bit and also to reduce the heat produced due to friction which causes less wear and tear of the bits. An actual diamond bit is a complex affair, usually designed for a specific rock type, with many channels for washing.

    The drill uses a diamond encrusted drill bit (pictured on the right) to drill through the rock. The drill produces a "core" which is photographed and split longitudinally. Half of the split core is assayed while the other half is permanently stored for future use and re-assaying if necessary. Although a larger diameter core is the most preferred it is the most expensive. The most common diameter sizes of core are NQ and CHD 76.

    Early exploration companies tended to choose drilling contractors who typically charge per meter rates and/or day rate depending on difficulty of project. For example, Energold Drilling would provide diamond drilling services for projects with limited infrastructure and focus on portability, whereas larger drilling groups such as Boart Longyear tended to work on established producing mine sites.

    Core extraction

    Merely advancing the drill by rotary action (and washing) causes a core to be extracted inside the barrel as shown. However, at a depth of perhaps 300 m, there must be a way to retrieve the core and take it to the surface. Constantly withdrawing the entire heavy drill pipe is impractical, so methods were developed to pull up the core inside the barrel. If the rock would always be solid granite, and the core would always break at the drill bit, then it would be a simple matter to stop the drilling, and lower a simple grabbing device by a wire and pull up the core. Unfortunately, many applications require an undisturbed core in fractured rock, which calls for elaborate wire-line devices.

    The photo shows the extraction of a core, using a triple-tube wire-line system, capable of extracting core under the worst conditions.[4] This is very important when exploring fault zones such as the San Andreas Fault.

    Tube sizes

    There are five major "wire line" tube sizes typically used. Larger tubes produced larger diameter rock cores and require more drill power to drive them. The choice of tube size is a trade-off between the rock core diameter desired and the depth that can be drilled with a particular drilling rig motor.

    Standard "Q" wire line bit sizes

    Standard "Q" wire line bit sizes
    SizeHole (outside) diameter, mmCore (inside) diameter, mm
    AQ4827
    BQ6036.5
    NQ75.747.6
    HQ9663.5
    PQ122.685
    CHD 7675.743.5
    CHD 101101.363.5
    CHD 13413485


    Q Series Wireline Core Barrel System Sizes
    SIZECORE ØHOLE Ø
    AQTK35.5 mm (1-3/8 in)48 mm (1-7/8 in)
    BQ36.4 mm (1-7/16 in)60 mm (2-3/8 in)
    BQTK40.7 mm (1-5/8 in)60 mm (2-3/8 in)
    NQ47.6 mm (1-7/8 in)75.7 mm (3 in)
    NQTK (NQ2")50.6 mm (2 in)75.7 mm (3 in)
    NQ345 mm (1-3/8 in)75.7 mm (3 in)
    HQ63.5 mm (2-1/2 in)96 mm (3-3/8 in)
    HQ361.1 mm (2-3/8 in)96 mm (3-3/8 in)
    PQ85 mm (3-3/8 in)122.6 mm (4-7/8 in)
    PQ383 mm (3-1/4 in)122.6 mm (4-7/8 in)


    Core Barrel System Sizes
    SYSTEMCORE ØHOLE Ø
    mminmmin
    A48,01.8927,01.06
    B59,92.3636,41.43
    N75,72.9847,61.88
    H96,13.7863,52.5
    P122,64.8385,03.35




    Keywords:


    Core Barrels
    Craelius Core Barrel
    Longyear Core Barrel
    Boart Longyear Core Barrel
    Secoroc Core Barrel
    Atlas Copco Core Barrel
    Core barrel

    Wireline Core Barrel
    AQTK Core Barrel
    BQ Core Barrel
    NQ Core Barrel
    HQ Core Barrel
    PQ Core Barrel
    NMLC Core Barrel
    HMLC Core Barrel

    BWG Core Barrel
    NWG Core Barrel
    HWG Core Barrel

    AQWL Core Barrel
    BQWL Core Barrel
    NQWL Core Barrel
    HQWL Core Barrel
    PQWL Core Barrel
    SQWL Core Barrel
    Double Tube Core Barrel

    Metric Core Barrel
    T2-66 Core Barrel
    T2-76 Core Barrel
    T2-86 Core Barrel
    T2-101 Core Barrel
    T6-76 Core Barrel
    T6-86 Core Barrel
    T6-101 Core Barrel
    T6-116 Core Barrel
    T6-146 Core Barrel
    WT SERIES CORE BARRELS:
    BWT SERIES CORE BARRELS
    NWT SERIES CORE BARRELS
    HWT SERIES CORE BARRELS
    PWT SERIES CORE BARRELS
    WM SERIES CORE BARRELS:
    AXM/AWM SERIES CORE BARRELS
    AXM SERIES CORE BARRELS
    AWM SERIES CORE BARRELS
    BWM SERIES CORE BARRELS
    NWM SERIES CORE BARRELS
    HWM SERIES CORE BARRELS
    WG SERIES CORE BARRELS:
    BWG SERIES CORE BARRELS
    NWG SERIES CORE BARRELS
    HWG SERIES CORE BARRELS
    WF SERIES CORE BARRELS:
    NWF SERIES CORE BARRELS
    HWF SERIES CORE BARRELS
    BWL Core Barrel
    NWL Core Barrel
    HWL Core Barrel
    PWL Core Barrel





    FAQ



    Terms & Conditions of Ordering:


    Quality warranty:
    Our products are made of high quality steel and all spares parts are inspected strictly before shipping. We have quickly responses for your complaint and suggestion.


    Package:
    Using ply-wooden cases and pallet for package to protect the products and avoid the damage during transportation. Also we can customize package according to your special requests.


    Production time:
    Generally need 15-25 days


    Transportation:
    By air, By Express or By sea according to your requests.



    1. Methods of Payment:
    T/T (Telegraphic Transfer) or Western Union or L/C at sight


    2. Handling time for an order
    Based on order quantity, normally it takes 20 days for production.
    in 3 working days after receiving the advance payment


    3. Shipping way
    Sample order: we suggest Courier express like DHL/UPS/TNT/FEDEX or by air
    Bulk order: we suggest by air or by sea.


    4. Quality Control
    We have our own experienced QC.
    There will be strict inspection and testing for every order before shipping out.


    5. After Services:
    a. Our sales team will response for your question within 24 hours (Holidays Excluded)
    b. Technical Support will be available in any time


    6. Quality & Service:
    A. There will be strict inspection and testing for every order before shipping out.
    B. Our sales team and Technical Support will response for your question within 24 hours through skype: ROSCHEN.TOOL and WhatsApp/Wechat: +86-13764195009
    C. Free replacement will provide once the failure confirmed caused or our product quality; Not satisfied with a refund.





    For more information, please contact:



    ROSCHEN INC.
    ROSCHEN GROUP LIMITED
    ROSCHEN HOLDINGS LIMITED

    Skype: ROSCHEN.TOOL , ROSCHEN_GROUP

    WeChat: +86-137 6419 5009 ; +86-135 8585 5390

    WhatsApp: +86-137 6419 5009 ; +86-135 8585 5390

    Email: roschen@roschen.com ; roschen@roschen.net

    Website: http://www.roschen.com ; http://www.roschen.net

    http://www.roschen.cn ; http://www.roschendrill.com

    http://www.roschenmining.com ; http://www.roschendrilling.com

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