I never had luck opening a drive sled with a paperclip. The clips are too soft and they bend before you can exert enough force to overcome the latch.
To push open a drive sled, you really need quite a bit of force.
Luckily, i still have an original opening pin that was included with a drive many years ago. That has at least double the diameter of a paperclip, it actually barely fits the hole. It flexes a bit, but does not bend.