The only good prospect is in the KHL and the best prospect (Starrett) got injured a year ago and basically fell off a cliff. He was part of the 17 AHL game win streak that almost broke many records.
I was just looking at guys the Oilers currently have under contract . Shane Starrett doesn't seem to be ( anymore ? Seems to be playing ECHL right now ) and Konovalov is in the KHL like you said and has no signed with the Oilers yet.
The Oilers goaltending behind Koskinen is well to put it mildly not great and that was with Smith not injured.
They better hope Koskinen doesn't get burned out until Smith is back or they find someone even remotely NHL caliber.
I don't know how comfortable i would be with Stuard Skinner , Olivier Rodrigue , Dylan Wells and newly aquired Troy Grosenik as backup options.
Koskinen is decent but he usually gets burned out after too many games and right now there ain't a rest in sight for him.