How to ensure that a water pipe above the frost line (which isn't used in the winter) doesn't burst?

How to ensure that a water pipe above the frost line (which isn't used in the winter) doesn't burst? We own a rural property where we only go during spring/summer/autumn, but don't visit in the winter. On that property we have a well for water - that's a classic-type well with a bucket and all, except that instead of a bucket we've lowered a submersible pump into it and when we plug in the electricity, water comes up a hose. I want to make this setup a bit more permanent and convenient. I want to run an underground electricity cable to it, and bury some pipes to several locations where I need the water. Maybe even add a pressure vessel and pressure switch, though I've not decided on that yet. The part that worries me is that our country (Latvia) normally gets a few months of sub-zero temperatures per year, and the permanently underground pipes might rupture if they're full of water. I could dig them deep enough below the frost line... but that's around 1-1.5 meters here, so pretty deep. It'd be a tough job. I'd prefer to avoid that, if possible. Since I won't need to use them at that time, I'm happy with preparing them for the winter somehow (we already remove the pump for the winter anyway) - draining maybe? But how to drain an underground pipe? Are there any standard solutions for situations like this? Maybe there's a pipe material that can stretch enough not to care about ice expansion? Maybe I can angle the pipes a bit and add a downward-facing valve that I can somehow open from above ground and drain them into the ground? Is there such a thing?