Drilling conductor section through template (semi)

04 May 2015 Putting together detailed programme for drilling 42" x 26" hole through a (4 slot) Aker template. Would anyone be able to provide any best practice guidance, particularly around the following subjects:

• Minimising washout around the wellbay insert such that returns come up the sleeve (to be removed by a CTS system) rather than into a crater and cover the template
• 26" Bit / 42" HO configuration. Normally use a 10ft pony b/w in conventional wells but concerns around the 26" being off-centre within the 42" when the well is spudded and the HO subsequently sitting down on top of the well bay insert. Best option looks to be dropping or significantly shortening the pony such that the well spuds with the 42" HO already inside the well-bay insert sleeve but wonder if there is good practice that has been developed in this out there?

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