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With a hanging slot, spiral drill collar slips slot
With a hanging slot, spiral drill collar slips slot

With a hanging slot, spiral drill collar slips slot

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Do not enhance the short section and the safety of kava

In the ordinary drill collar or spiral drill collars within the threaded end of the outer surface of the processing hanging slot and kava slot tripping can not upgrade a short section and the safety of kava. The size of the hanging slot and kava slot, in line with the API Spec7-1 standard, to wear with the drill collar is optional.

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