One year after a deadly oil-rig explosion set off the worst offshore spill in U.S. history, the environmental minefield of abandoned wells in the Gulf of Mexico is worse than first thought, with no ...

The tricky process of sealing an offshore oil well with cement — suspected as a major contributor to the Gulf of Mexico disaster — has failed dozens of times in the past, according to an Associated ...

While the chain of failures on Deepwater Horizon is under investigation, rig owner Transocean has singled out cement work as one likely fundamental cause of the blowout. Even before Transocean pointed ...

Coiled tubing (CT) in plug and abandonment (P&A) is a rig or rigless conveyance method to clean, access, and place permanent well barriers (cement/mechanical), verify integrity, and prepare the well ...

The tricky process of sealing an offshore oil well with cement - suspected as a major contributor to the Gulf of Mexico oil spill disaster - has failed dozens of times in the past, according to an ...

Without those plugs, there is little to prevent powerful leaks from pushing to the surface, so these wells could be an even greater environmental threat than wells that have been sealed and classified ...