The ultimate goal is to gain access into the pipes in order to perform a camera inspection. We are considering drilling horizontally through the downstream end of the pipes in hopes of drilling completely through the plugged portions, which would allow us to push a CCTV camera from the downstream end of the pipes. The main concern with drilling horizontally through the concrete plugs is the risk of drilling through the steel pipe wall. We will need to consider methods and technology to reduce this risk as much as possible."
I would guess that they won't have a very capable drilling rig available, and that this may be a cost sensitive operation. It seems to me that the right drill bit should be able to drill out the cement without any danger of damaging the pipelines. Any advice or referrals would be appreciated.
Thanks in Advance - Neil Smith Bergstrom, MagVAR / H&P Technologies, Denver