drilling operations recommence at macintyre 2, page-3

I believe the Service Rig is a smaller/lighter unit as it will be only involved in completion, fraccing and flow testing..

I would presume that the delay in mobilizing the Service Rig is mostly a form of "operational insurance"(?), against having the Rig on "Downtime", (costly AND unproductive) in the event of Rig 918 having unplanned downtime,or,in the HIGHLY UNLIKELY event of the first two wells being
rated as unproductive,
and consequently not worth fraccing..Only a guess on my part...

All hydrocarbon shows in the vertical sections of both wells and in the horizontal section of B-2 have been most encouraging..