ACKNOWLEDGEMENTS It is one thing to think that you know a subject but quite another to confidently write it down, secure in the knowledge that no one will challenge you later. I definitely fall into the former category. I assert that there are no experts in completion design, but there are experts in specialities within completion design. It is to many of these experts that I have turned for guidance and verification. I thank Alan Holmes, Paul Adair, Andrew Patterson, Mauricio Gargaglione Prado, Simon Bishop, John Blanksby, Howard Crumpton, John Farraro, Tim Wynn, Mike Fielder, Alan Brodie and Paul Choate for.
