Pour votre information, on ne fait pas forer une barge à n’importe quelle profondeur, il faut quand même qu ele derrick puisse supporter le poids des tiges de forage et accessoirement que la machine flotte suffisamment pour garder le tout au dessus de l’eau
en septembre 2009 elle a foré à 10685 mesuré pour 10680 vertical (dont 1300 d’eau). Elle est théoriquement classée pour environ 9000m de forage dont jusqu’à2400 d’eau), BOP classé 15000psi
pour des analyses sérieuses sur ce qui s’est passé
http://www.msnbc.msn.com/id/37279113/#storyContinued
According to Steven Mufson and David A. Fahrenthold of the Washington Post,
both Transocean and Halliburton, the other two oilfield service
companies involved in the spill, blame BP for its instructions to
remove drilling mud from the riser prior to capping it (May 12, 2010,
“In Senate testimony, oil executives pass the blame for massive gulf
spill”). The mud, whose pressure likely helped to contain the well, was
replaced with seawater before the well was sealed, possibly
contributing to the blowout. It is unclear why this was done, although
some commentators have implied that it was a decision based on saving
time and money.