I own several midstream energy master-limited partnerships (MLPs), which have gone from being seemingly safe income plays to being as hard hit as other more obviously risky plays due to the present market meltdown. But that doesn't mean that the companies themselves have become any riskier. What it does mean is that you may have to pay closer attention to their balance sheets than you might have previously. Having done that, I have one that I think presents an opportunity here. But first, a little background.Insiders were (and still are in some cases) active buyers in these firms, which transport oil, gas and related liquids from where they are produced (downstream) to where they are refined and consumed (upstream). Terminalling and storage of these commodities are also usually a part of the business mix of most midstream MLPs.