H Type And Aj Safety Joint - Chinaprice: contact company for price
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,
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.
- Posted By: Mudanjiang Dongxu Machinery Co.,Ltd
- Phone: 8613614631909
- Address: Dongxu 2st, No.5, Aimin Dis, Mudanjiang , China
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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