does anyone produce a low profile clamp for 4" pipe,have some limited access drill shafts 10' head clearance 30' depth and have to get the trimee within 4' of the bottom we have some screw together but they are not working to well looking for a very low profile clamp that wont hang up on the rebar cage,if I cant find some I'm gonna start inventing and yall know thats gonna get dangerous 

 I am assuming from your post that 4" electric conduit has already been tried?

Are you displacing water or just filling the hole?

displacing water

Biz' 57 is right. I don't see where you have much choice. The elect' conduit can be threaded together with a gob of never-seize and pour it out. . And you can weld a HD end on one steel coupler to hooker-up.

yeah I got all that just hoping for an easier route