dual derrick vs offline makeup running casing in stands

19 August 2017 Hi all.  I need to get some statistics to compare dual derrick rigs vs rigs with good offline racking capability for running casings.  Can anyone get me some running times (in feet or metres/hour) for uninterrupted casing operations in different casing sizes?  I'll need to know whether it's a 3 joint stand or a 2 joint stand of casing, whether it's dual or single derrick + offline racking for some common casing sizes, so that would be 16" and below. 

Thanks for any help.

Regards, Steve

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