Friction Kelly bar applied to the soft and mud formation layer. Six -ribs makes the whole set Kelly bar light weight,high stength and linearity of the single pipe, the inner and outer layer collocate reasonably, with good wear resistance plate.

• Application

  Bauer / Soilmec/ Casagrande/ Liebherr/ IMT / Mait / Sany /XCMG/ Sunward/ Zoomlion/ TEG or modified small drilling rig.
  

  • Materials & Technology
    • 1st-2nd pipe Materials: 27SiMn or 35CrMo undergone quenched-tempered heat treatment.
    • 3rd-5th pipe Materials: Q345B undergone quenched-tempered heat treatment.
    • Kelly drive stub Materials: Soid forging with HRC305-335 and tensile strength 1050 Mpa.
    • External pressure key: 35CrMoTi.
    • Kelly spring Materials:60Si2Mn.

  • Delivery & Package & Shipping time

    Delivery time: Normally within 10 working days after get the deposit.

    Package & Shipping time: Usually for Kelly bar exported standard wrapped with aluminum film and fixed pallet tray shipped by bulk cargo vessel.

  • Trade & Payment terms

    Trade terms: We offer EXW/FOB/CIF/CIP/DDP... Port price.

    Payment terms: 30% T/T as deposit, 70% T/T balance payment before shipment.

  • Warranty & after-sale Service

    ONE year since manufacture date. Out-of-warranty, online video for trouble-shooting or paid maintenance service with engineers sent to be abroad.

  • Why you choose us?

    1. Seasoned R&D and Manufacturing Terms

    with 15 years of professional experience in Kelly bar design and manufaturing. KR Drilling is capable of providing overall construction solutions and designing customized high quality Kelly bar based on various drilling conditions that the customers encounter.

    2. Top Quality Raw Materilas

    the raw materials o f steel pipes we use are supplied by the best manufactures in China with CE certifications. Our Kelly bars are made of high strength alloy-steel tubes with high torsional and compressive strength which will meet the strict requirments for drilling in hard formations.

    3. More Life Out of our Wear Parts

    the key components such as drive keys, locking recesses are made of high strength and wear-resistant materials with special heat-treatment that would help to improve the life of these parts. The internal drive keys are made of high strength and wear-resistant steel plate. these welded components also undergo special heat treatments. It not only improves the drive keys wear resistantproperties, but also the welding properties.