A double bind is a no-win scenario where you are either forced (or feel pressured) to do something you can't do on demand, or in a another situation, are penalized for what you do.
I'm in a double bind here: if I can't fall asleep now, then I'll be too tired to wake up tomorrow morning, and if I don't wake up, I'll be late for work and they'll fire me. And if I take sleeping pills, I for sure won't be able to wake up... I wish I could just fall asleep when I want to and get up when I want to! What a double-bind!
An oilfield term that means you are in a predicament or one heck of a situation. Literally, it refers to the block on a drilling rig. The more lines on the block, the more weight you can lift. If you get in a bind with nine lines on the block, there's not much more you can do.