 Following the April 2010 destruction of the Deepwater Horizon while drilling the Macondo well , and the resulting oil spill , all appraisal activities at 33 wells under exploration in the Gulf of Mexico , including Tiber , were placed on hold . At least two rigs that might otherwise have been used for developing Tiber are also in use on the relief wells for the ruptured well . 
 Following the April 2010 destruction of the Deepwater Horizon while drilling the Macondo well , and the resulting oil spill , all appraisal activities at 33 wells under exploration in the Gulf of Mexico , including Tiber , <a href='uninflect' title='1'><mark>were</mark></a> placed on hold . At least two rigs <a href='null_relcl' title='2'><mark>that</mark></a>might otherwise <a href='been_done' title='3'><mark>have</mark></a> been used for developing Tiber <a href='drop_aux' title='4'><mark>are</mark></a>also in use on the relief wells for the ruptured well . 
Following the April 2010 destruction of da Deepwater Horizon while drilling the Macondo well , and tdaresulting oil spill , all appraisal activities at 33 wells under exploration in the Gulf of Mexico , including Tiber , was placed on hold . At least two rigs mite otherwise done been used fir developing Tiber also in use on the relief wells for thdauptured well .