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  • Spiral Drill Collar Of Application To Oil Drilling - China

    price: contact company for price

    1.Drill collar is made of AISI 4145H steel, which the

    special steel of each chemical element control is quite

    tight, after a medium frequency induction heating quenching

    and tempering, from 1 "below the surface of tube body can

    ensure the brinell hardness of 285-341 - hb. Charpy impact

    energy reaches more than 54 j.

    2.Spiral Drill Collar

    Spiral drill collars are widely used because its own

    features, the special spiral drill collar can reduce the

    contact area of wall and pipe body, thereby avoiding the

    phenomenon of "sticking" of the drill string.

    Type A (cylindrical) : using ordinary alloy steel

    manufacturing, the tube is circular cross section inside and

    outside the drill collar.

    Type B (spiral) : using ordinary alloy steel manufacturing,

    pipe surface with spiral groove drill collar in vitro.

    C (no magnet) : with very low permeability of stainless

    steel manufacturing, pipe body inside and outside all is

    circular cross section of the drill collar.

    3.Material:AISI 4145H MOD

    The hole diameter: 101 mm

    Application: oil drilling

    Elevator slot depth and the size of the slip groove depth

    according to the nominal outer diameter of the drill collar

    Angle is reference and approximation

    Radius cold machining


    Company Contact:


    • Phone: 03916080816

    • Address: Jiyuan City Henan Province of China Mainland, Jiyuan , China

    • Email: Email


    Published date: April 27, 2013 -

    • Business Description: JIYUAN CITY HUAZHONG METALLURGICAL MACHINERY CO.LTD is located in Jiyuan

      City Henan Province of China Mainland, created in 2006 with the

      registered capital RMB 5 million. Nowdays it has grown as a middle

      export enterprise which operates metallurgical spare parts, machining,

      steel products and forging so on.

      We have heat treating and machining workshops with the variety of equipments. Such as,box type resistance furnace, pit type resistance furnace, the domestic advanced double medium frequency quenching machine handling the maximal workpiece diameter of 600 mm, the maximal workpiece length of 5000 mm in heat treating workshops . In mechanical processing workshop with strong mechanical processing capacity, there are a variety of large and medium and heavy duty lathe, deep hole drilling and boring machine, CNC gantry milling machine, horizontal boring machine, grinding machine, sawing machine and a series of heavy machinery processing equipment. There are many senior technicians , experienced technical personnel and management personnel.

      The products we could manufacture include forged steel roller, leveling rolls, corrugated roller and pipe mould so on as per the customer s specific requirements.

      Our aim is to use our service and sincere exchange for your trust and supports, Quality and credibility are the most basic concepts to build our brand and create mutual benefit and win win situation.

      We are willing to sincerely cooperate with all the colleagues home and abroad in order to create a better future.

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