I'm not an expert but I will state that x-37 in orbit doesn't have 23km/s delta-v. I think wiki for similar vehicles can confirm that: http://en.wikipedia.org/wiki/Delta-v_budget
Its a hydrazine monopropellent, or so they say, so an Isp of 250 or so would be impressive. Someone with a lot more time on their hands can tell you the mass fraction required to get 23 KM/s outta a 250 second Isp and its going to have about as many 9's as reliability marketing material. So yeah, thats not happening.
