I used one back in the 90’s trying to extract a broken manhole cover stud on a nuclear steam generator and it was a portable unit and no fluid was required. We did a mock up before the job which worked great but when we did the actual job, the HP’s (health physics tech’s) wrapped the machine up covering the air flow cooling louvers (trying to protect the machine from contamination), it fried the machine before we made much progress.
One of out more talented welders flushed the stud out with a OA torch.
I see a smaller example of one on eBay which is fairly reasonable. Here is a
link.
