I'm not sure you read the entire PR.
"The merger is subject to the approval of Allis-Chalmers' stockholders as well as HSR approval, and other customary conditions.
(Stockholders haven't voted on it yet)
The companies anticipate that the transaction could close as soon as the end of the calendar year.
(Of course it will come to pass, but it needs to be voted on by current shareholders first)
Seawell and Allis-Chalmers intend to file a proxy statement / prospectus with the U.S. Securities and Exchange Commission as soon as possible."
(We should hear something in the next month or so)
jmat