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H Type Sarety Joint
The H type safety joint, which is installad on the position required for subsurface driII stem and can bear in fishing operation all kinds of Ioads for pulIing or pressing and used to transmit torque is a subsurface safety equipment.In down hole operation¡ê?in case of being needed,the safety joint is easy to be discharged off so as to take out the driIl stem above it.It is easy to butt the safety joint to go on fishing operation when running in hole again.

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