Circulating sub preferences

08 April 2018 Can end users please state what manufacturer/supplier and design type of drilling circulating subs they prefer to use and the main reasons why?
Also, what if any different modes can the chosen tools be used in?
100% circulate through bit, 100% circulate through circ sub with flow to bit shut-off, split flow between bit and circ sub for example or other modes.
What are the methods of activation for the chosen sub, flow only, ball and flow, dart and flow, RFID for example or other methods.

Thanks in advance......

1 Answer(s)

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