BP Extends Test of Well Cap Beyond Initial 48-Hour Timeframe

As this afternoon marks the critical 48-hour point since BP plugged its Macondo well, engineers tensely monitor pressure readings and underwater images from their massive cap and try to decipher them.

With pressure at the wellhead rising ever so slowly—yet rising nonetheless—BP hopes to have more definitive data that its cap is working...and that leaks haven't sprung up elsewhere.

BP said on Saturday that the cap over the oil leak in the Gulf of Mexico was continuing to hold.

The announcement will be greeted with cautious optimism following months of misery after the Deepwater Horizon rig exploded in April. Integrity tests on the cap have been taking place since Thursday evening, having stopped oil leaking from it for the first time in three months, and are due to end at around 8pm UK time on Saturday.