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AJ Type Safety Joint AJ type safety joint is a specialized joint consisting of two parts The specialized joint takes protective effect for drilling stem in drilling￡? repairing and test oil(gas)engineering￡?etc It is used to treat well bottom accident and used to be on°the2way test in drilling and coring operation It is connected to the requirad position of drilling stem to protect driIling stem without any influence on the normal working of driIling tool. Specifications

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