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.
interesting question: I have done this in the past but have to say it's not a straightforward answer.
In my experience (dual derrick rig) the stands had to be racked in the setback area, and had to be brought from there to the main drill centre (there was no "direct" transfer). This process turned out rather awkward and in the end we ran smaller sizes (I think 13 3/8" and below) in singles because it was faster.
You can PM me for more details.