This week brought two significant setbacks to Royal Dutch Shell's (NYSE:RDS-A) already labored efforts to revive its Arctic drilling projects in Alaska's Chukchi Sea. As one barrier after another interferes with Shell's plans, can it really be a good idea for the company to continue along this track?

Of grounded rigs and threatened species
This week's rough news for shell came double. First, the Department of the Interior is asking the oil and gas industry for some analysis of Chukchi reserves that would require significant expenditure to achieve. It's widely believed that the Chukchi is the most valuable, undeveloped oil reserve in the world, but the DoI wants it parsed according to what specific areas hold the most promise, so other parcels can be set aside as endangered-species habitat. That's a tall order for industry.

Second, environmental groups banded together to formally petition the Obama administration this week to halt Arctic drilling altogether. Their premise? That Shell's series of calamities in 2012 -- to include air permit violations and a grounded rig -- demonstrate that Arctic drilling cannot be done safely. Ouch.

Meanwhile, Shell's profits have taken a recent nosedive, and the company is losing its CEO and preparing for accession. And that's just on top of all the other hurdles that the company already faced to its prospective return to the Chukchi and Arctic drilling. In light of all this, can it possibly be a good idea for the company to stay its course? Watch the following video to find out more.

Sara Murphy has no position in any stocks mentioned. Follow her on TwitterL @SMurphSmiles. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.