There is always a possibility of further oil spilling when the temporary cap is removed to install the permanent structure, and when digging the relief well, but it is not likely.
“Once the Deepwater Horizon BOP is removed, Transocean’s Development Driller II semi will install another BOP on the Macondo well so that a relief well being drilled by the Development Driller III can be completed to intercept the Macondo well and kill it from the bottom.
“We do believe the risks are small of a hydrocarbon release, but we want to be sure we are prepared for all contingencies,” Allen said. “There shouldn’t be any hydrocarbon release into the environment.”
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