US supermajor ExxonMobil has hired EnerMech for flowline decommissioning of the Hoover-Diana fields in the Gulf of Mexico.
Under the contract, won following a competitive tender, EnerMech will decommission subsea flowlines, and the scope will include flushing, pigging, and filling the lines to remove hydrocarbons and prepare for safe decommissioning.
The operation will require multiple service lines, including coiled tubing, pressure pumping, chemical services, filtration, separation, and pipeline gauging.
This involves 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.
Hoover and Diana fields lie about 260 km south of Galveston, Texas. Diana is located mostly within East Breaks blocks 945 and 989 in 1,460 m of water. Hoover lies in Alaminos Canyon blocks 25 and 26. The fields were discovered in 1990 and began production in 2000.
“With many offshore assets reaching the end of their lifecycle, the decommissioning market in the Gulf of Mexico is expanding rapidly,” said Charles ‘Chuck’ Davison Jr, EnerMech CEO.
