The Oilers likely are not expecting Calvin Pickard to save their season. Rather, he is likely a stop-gap measure designed to get the team back on the right track before they can make a more significant move. One team that has been open about accepting offers on a goalie is the Philadelphia Flyers, who are reportedly open to trading Carter Hart for the right price.
Still, this could fit in with the stop-gap approach. The oilers may take a week or two to see how things go before making a more significant move. Regardless, trades in the NHL take time. Even if the team wanted to make a move today, they would likely have difficulty coming to an agreement to quickly.