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Please refer Workflow Objects Guide and see what is Escalation Pools and what they are used for.
You will probably get answers to your question.
I dont think you can run the escalations with out giving the time-interval.
Now the question is what do you want to acheive and why do you want to do so.
If you want to perform a set of actions using the individual escalation, then instead of writing so many escalations just write one escalation and set a flag on a form and then use filters to perform the actions which you want to peerform using the other escalations.
Hope this helps you.
Should you need any other clarification do reply back.