Remaining Life Assessment of Subsea Jumpers, Flowlines & Risers Case Study

Remaining Life Assessment of Subsea Jumpers, Flowlines & Risers  Case Study

GATE was engaged to evaluate the current condition and remaining life of the subsea jumpers and flowline of a deepwater oil and gas facility in the Gulf of Mexico.

The subsea field, which was comprised of multiple oil wells, was produced at a Tension Leg Platform (TLP) with a nominal capacity to produce 100,000 barrels of oil and 50 million cubic feet of gas per day. The subsea and topsides facilities were designed to operate with an expected maximum carbon dioxide (CO2) concentration of 0.15 mole percent from any given producing well.

Post-ILI Corrosion Assessment & Wax Control Strategy Case Study

Post-ILI Corrosion Assessment & Wax Control Strategy Case Study

After an in-line inspection of a pipeline in West Africa, a client discovered significant wall loss in the first three miles of the line. The tool also returned significant wax deposits, casting doubt on the current wax management efforts in place.

The wells producing to the pipeline historically produced H2S; however, the worst offenders were shut-in quickly after it was discovered that they were producing extremely high concentrations of the sour gas.

Third Party Facilities Assessment Case Study

Third Party Facilities Assessment Case Study

As part of a recent asset acquisition due diligence, GATE was asked to deliver a third party review of the condition of the asset and remaining production life of a floating production system and a fixed jacket.

GATE developed a standardized work process to evaluate the current condition, potential production bottlenecks and future operating expenditure (OPEX) associated with the brown-field producing asset.

Riser Life Extension Review Case Study

Riser Life Extension Review Case Study

The review of the remaining cathodic protection (CP) life of a Gulf of Mexico tension-leg platform (TLP) was undertaken to evaluate the ability of the current systems to support a 20-year life extension. At the same time, the opportunity to include non-destructive riser testing into the life extension program was also identified. 

Inspection of Mill Certificates Case Study

Inspection of Mill Certificates Case Study

During the fabrication of the subsea boarding valve skid for a major offshore platform in the Gulf of Mexico, the fabricator purchased several large forgings.  These large forgings, from 8” to 12” in diameter, were to be machined into block valve bodies rated to 15,000 psig. As part of the agreed-upon Inspection and Test Plan, the mill certificates for the forgings were reviewed by the fabricator and by the company inspector.

SlipLine® - Pipeline Remediation Solution in LA Wetlands Case Study

SlipLine® - Pipeline Remediation Solution in LA Wetlands Case Study

A Louisiana operator experienced integrity issues with an existing 3 inch saltwater disposal pipeline. Production history recorded multiple leaks in the existing pipe, which resulted in environmental remediation. Upon investigation the operator determined that the said discharge pipe was unsuitable for future use. BlueFin was sought to review the situation and develop a plan of action that would resolve the integrity issues.

Steam Plant Piping Corrosion Case Study

Steam Plant Piping Corrosion Case Study

A steam generating plant supporting an associated thermal recovery project in the Middle East was experiencing through-wall corrosion of carbon steel lines. In some locations this was aggressive enough to corrode through replacement piping in as little as two months.
Downtime in the steam plant was reducing heavy oil production and increasing OPEX. GATE was invited to the site to take a closer look at the operation and management of the system and determine how corrosion could be more effectively controlled.

Onshore Asset Integrity Management Case Study

GATE was consulted to identify the source of unexpected levels of H2S that had been detected in the central processing facility. Ultimately, GATE was able to determine that multiple operational issues needed to be addressed to mitigate the high levels of H2S in the processing facility, rather than the H2S naturally occurring in the reservoir.