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Pickard core barrel

A double-tube core barrel in X-group sizes. The distinguishing feature of the Pickard barrel is that when blocked, the inner barrel slides upward into the head, closing the water ports and stopping the flow of the circulating liquid; no additional drilling can be done without irreparably damaging the bit until the barrel is pulled and the blocked inner tube is cleared.

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  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 points
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