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drilling pipe
piping design
drilling tool
kelly drill
pressure relief valve
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drilling data
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Application: Safety sub is used to connect the upper top drive kelly valve with lower drill pipe.
Design: The joint is an integral structure processed with high-quality alloy structure, and will be subjected to a special heat treatment process to achieve the expected hardness, strength and impact resistance.
Ordering instruction:
Any special requirement on thread type or temperature, please specify before order.
