TransOcean Marianas first drilled at Well A from 7 Oct till 9 Nov 2009. On 28th Oct 2009 Tony Hayward (CEO of BP) disposed 220,000 shares on the same day the Marianas reported some serious well problems which lasted till 31 Oct 2009. Ten (10) days later (on 9 Nov 2009) the well was officially abandoned due to damages sustained from Hurricane Ida. The total depth drilled was only 4,023ft (1,226m) below mud line (bml). On 17th Nov 2009, Byron E Grote another BP Director sold 150,000 of his BP share holding.
On 3rd Feb 2010 the Deepwater Horizon (owned and operated by TransOcean) was directed to drill Well A, by re-entering the previously abandoned well. BP has maintained that this was the only well drilled in February till the blowout on 20 April 2010. The well apparently took a total of 10.5 weeks to reach the targeted reservoir at 18,000 ft bml around 16 April; 6.5 weeks longer than expected. The Deepwater Horizon (DWH) caught fire in a blowout 4 days later (on 20 April 2010) which resulted in the worst ever mega-oil spill disaster experienced during peace time.