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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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