Client: Eni Petroleum
Project: Longhorn Flowline Segment Hydrate Remediation
Location: Gulf of Mexico, Mississippi Canyon, Block 502
Scope of work
The primary objective of this project was to clear the flowline of a hydrate blockage to restore production from well #3. The extent of hydrate formation was unknown. The only access was through 1” hotstab port in the ROV panel on the far side of the pipeline segment. We were required to allow for the rest of the system to continue production while still maintaining the dual barrier (from live production) and effectively remediating the blockage. We used topside pumping and separation capability to remove potential mudline restriction which competitors’ systems may introduce. Additionally, nitrogen injection and gas lift were utilized to remove liquid contents from one side of the blockage, effectively reducing pressure and providing a dry environment (both of which aid in the dissociation of hydrate formations.)