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  • H Type And Aj Safety Joint - China

    price: contact company for price

    Description: The MDX Safety Joint is manufactured to provide

    safe and easy release and make-up whenever disengagement

    becomes necessary. This dependable, field-tough tool is

    designed to transmit torque in either direction when placed

    in the drill, fishing, or wash-over string.

    The safety joint consists of a: Pin Section, Friction Ring,

    Box Section

    The internal connection of the safety joint is a coarse acme

    thread used to facilitate easy pack-off and re-engagement. A

    knurled release ring between the box and pin sections

    maintain torsion integrity until back-off procedure is

    initiated. An O-ring seal contains pressure while the safety

    joint is made up.

    Safety joints are divided into type H, type J and type AJ.

    Assembly and operation

    To assemble, install the safety joint in the drill string as

    indicated below. Make up the service connection to a torque

    of approximately 60 to 75% of the drill string connections.

    In drill strings, the safety joint should be located above

    the drill collars to avoid compression.

    In fishing strings, the safety joint should be located

    directly above the fishing tool but below the jar or bumper


    In wash over strings, the safety joint should be located

    between the drill pipe and the wash over pipe. Wash over

    Safety Joints are provided with a tool joint box thread and

    a wash over pipe pin thread.

    To disengage the safety joint while down-hole, place pipe in

    tension and apply left-hand torque. Hold torque while slowly

    lowering pipe until safety joint breaks. Continue to unscrew

    safety joint to the left. To re-engage the safety joint,

    lower pipe until pin section of safety joint lands on box

    section. Apply one point of weight. Rotate to the left one

    or two turns. Then rotate to the right until torque builds

    up, indicating safety joint is made up.

    Company Contact:

    • Phone: 8613614631909

    • Address: Dongxu 2st, No.5, Aimin Dis, Mudanjiang , China

    • Email: Email

    Published date: February 10, 2014 -

    • Business Description: Mudanjiang Dongxu Machinery Co.,Ltd has been honored with API spec 7 1

      certificate by America Petroleum Institute. Our factory covers an area

      of 20000square meters with a very strong team of technicians and

      researchers, possesses reliable production lines and advanced


      Our products: drilling tools,fishing tools,coring tools, diamond core bit, milling tools and so on. Our team will manufacture from existing designs or collaborate with the customer to design and manufacture to their specifications.

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