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Development Driller III relief well has intersected the Macondo well

Statement from National Incident Commander Admiral Thad Allen on Relief Well Intercept

Key contact numbers

  • Report oiled shoreline or request volunteer information: (866) 448-5816
  • Submit alternative response technology, services or products: (281) 366-5511
  • Submit a claim for damages: (800) 916-4893
  • Report oiled wildlife: (866) 557-1401
Deepwater Horizon Incident
Joint Information Center


Phone: (713) 323-1670
(713) 323-1671



"I have received extensive briefings over the last 24 hours regarding the final effort to intercept the Macondo well.  Through a combination of sensors embedded in the drilling equipment and sophisticated instrumentation that is capable of sensing distance to the well casing, BP engineers and the federal science team have concluded that the Development Driller III relief well has intersected the Macondo well.  This determination was made based on a loss of drilling fluids that indicated communication had been established beyond the relief well, the pressure exerted against the drill bit as it came in contact with the well casing and, finally, an increase in pressure in the choke line of the Macondo well blow out preventer.  While each of these indicators taken separately would not necessarily be conclusive, the aggregate data available supports the conclusion that the two wells are joined.  It is also important to note that none of the measurements supported a scenario where the annulus of the well is in communication with the reservoir.  Accordingly, we intend to proceed with preparation to cement the annulus and complete the bottom kill of the well.  Further information will be provided as cementing procedures are completed."

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