ExxonMobil lets decommissioning contract for Hoover-Diana developments

Key takeaways:

• ExxonMobil has let a decommissioning contract for Hoover-Diana in the Gulf of Mexico.
• The contract is for decommissioning subsea flowlines.

ExxonMobil has let a decommissioning contract to EnerMech for the Hoover-Diana development in the Gulf of Mexico.

The contract scope includes decommission of the subsea flowlines which will include flushing, pigging, and filling the lines to safely remove hydrocarbons and prepare for decommissioning, according to a release issued on behalf of EnerMech June 16.

The work scope includes flushing of the umbilical, pipeline flushing, and seawater fill operations for the subsea flowline loop, as well as nitrogen flushing via subsea vessel, coiled tubing services, and final seawater filling for the Northern Diana flowline.

Multiple service lines will be required for this operation, including coiled tubing, pressure pumping, chemical services, filtration, separation, and pipeline gauging.

Hoover and Diana fields lie about 160 miles south of Galveston, Tex. Diana is sited mostly within East Breaks blocks 945 and 989 in 4,800 ft of water. Hoover lies in Alaminos Canyon blocks 25 and 26. The fields were discovered in 1990 and successfully appraised in 1997.