Haliburton at fault in Deepwater explosion?

According to an article in The Wall Street Journal, referenced in The Huffington Post, Haliburton was in charge of cementing the well to keep gas from leaking, and the failure in this process is the likely cause of the explosion.

See the article here:

http://www.huffingtonpost.com/2010/04/30/halliburton-may-be-culpri_n_558481.html