ExxonMobil Taps EnerMech for Gulf of Mexico Flowline Decommissioning
(P&GJ) — EnerMech has been awarded a contract by ExxonMobil to deliver a complete flowline decommissioning package for the Hoover Diana development in the Gulf of Mexico.
The milestone scope includes decommissioning the subsea flowlines, marking EnerMech’s first major decommissioning campaign in the region. The award highlights the firm’s strategic methodology, integrated approach, and offshore operational expertise.
The Hoover and Diana fields, located 160 miles south of Galveston, Texas, have been a landmark offshore development since 2000. The project uses the once pioneering floating production deep draft caisson vessel technology and gained the world record for deepwater drilling and production depths.
Decommissioning a deepwater structure requires meticulous planning and execution. EnerMech’s early proactive collaboration with ExxonMobil ensured its comprehensive approach is optimized for safety, efficiency and regulatory compliance.
An expert team integrating multiple service lines from EnerMech’s Energy Solutions division will be deployed, including coiled tubing, pressure pumping, chemical services, filtration, separation and pipeline gauging.
The scope includes flushing, pigging, and filling subsea pipelines to safely remove hydrocarbons and prepare for decommissioning. 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.
“The Hoover-Diana project marks our first large-scale decommissioning engagement in the Gulf of Mexico, building on the strong relationship we’ve developed with ExxonMobil in Guyana since 2018,” said EnerMech CEO, Charles Davison Jr. “Executing a multi-service end-of-lifecycle project of this scale requires a highly skilled and competent workforce.”