A velociraptor is actually a pretty small dinosaur. Regular velociraptor aren't like the ones in Jurassic Park. The real ones only get to be about 3 feet, 4 at the tallest, and only weigh up to 60 pounds.

I'm pretty sure a few sure swings of an axe will take one down pretty quickly. They're very agile creatures, and they DO have a retractable claw, but it was only about 4 inches long. The reason why velociraptors were any good at bringing down larger prey was that they hunted in packs. They were also very smart animals, too.