[catalogia]

Rather than having to keep the drill bit cool, to drill through ice you could use a heated drill bit. Perhaps using using radioactive material to heat the drill bit and cut through the ice like a hot knife.

(Of course, irradiating an alien ocean is perhaps not the greatest idea ever.)

[ravenstine]

It sounds to me like Elon Musk needs to combine efforts between SpaceX and The Boring Company.

[mhh__]

Radium-knife: cooks the steak while you slice it!

It also means launching a large amount of radioactive material through the atmosphere which may end badly