I'm sorry, Richard, but it was a BP executive who told the drilling crew that the drilling was taking too long and costing too much, and ordered them to speed up the drilling.

What relevance this has to what happened escapes me. IIRC the well was being temporarliy capped to let the drilling rig move off so that a production manifold could be put in place. If that was the case then the drilling would have been completed days before, therefore how fast the hole was drilled doesn't enter into it.

What failed was the cement job to cap the well (Halliburton) and the BOP (Cameron/Transocean)