A midstream company required a Department of Transportation (DOT) integrity assessment on a 30-inch transmission gas pipeline. In order to meet federal compliance standards for continued gas operations, the operator elected to execute a hydrostatic pressure test between an existing compressor station and a mainline valve location.

A Gulf of Mexico upstream operator required pipeline abandonment solutions for one 6 inch pipeline. The operator’s permitted Department of Interior (DOI) decommissioning obligation required a seawater flush volume equal to 110% of the internal pipeline capacity.

A major midstream gas transmission company required Stress Corrosion Cracking (SCC) integrity assessment services to remain compliant with regulatory specifications. The pipeline was installed in the 1970s and was located in an environmentally sensitive area with high stakeholder interest and visibility. Further increasing project sensitivity, the pipeline owner expected multiple ruptures during the hydrostatic pressure tests phase. In order to compensate for this risk, an extensive outage period was scheduled and communicated to all customers.

A GoM upstream operator experienced problematic pressure differentials. Over a period of time this resulted in heavy paraffin deposition and ultimately caused several pigs to become stuck in the 6” flowline. Upon an evaluation of available remediation methods, an extended reach mechanical solution was selected to remove the lodged pigs and properly remediate the paraffin deposition.

A GoM operator witnessed a leaking 6” pipeline. Upon repairing the visual leak and attempting to perform a successful hydrostatic pressure test a second non-visual leak occurred, ultimately resulting in extended production loss.

In order to perform a second assessment and bring production back online, the pipeline assessment required a 100% fluidpacked volume of seawater to ensure an oxygen-free environment.

Qualified personnel and responsive management provide gas storage company with multiple SIM OPS pipeline pre-commissioning scopes of work.

Split frame lathe technology delivers field machining solutions for one Supermajor in the Dragon Field block.

Qualified personnel and responsive engineering provide midstream company with successful onshore pipeline reclassification and upgrade status.

LiquiGell® pigs and de-oiling chemistry provide economic solution for multi-phase Gulf of Mexico pipeline decommissioning campaign.

A large North American midstream company operating a gas storage facility required connection integrity management for a planned casing reroute. Due to damaged casing as a result of salt fall within the cavern, the said operator required a large Snubbing stack installation to handle the cavern pressure and capable of cutting 10 3/4” casing.

GATE was involved early in the seawater treating design basis to influence / impart operability and commissioning efforts. From the design phase, GATE became responsible for dynamic commissioning and start-up during the offshore phase.

GATE provided seawater treating equipment process, materials, corrosion, chemical, and commissioning / start-up expertise. The scope included shaping the design of the seawater treating equipment and providing commissioning leadership and start-up expertise. The equipment included a Minox and Sulfate Removal Units.

GATE was responsible for developing the overall Aseng Water Injection System Basis of Design.

GATE provided process / commissioning expertise in the pre-commissioning and dynamic commissioning of the Tahiti II deaeration system (100,000 BWPD Minox).

Scope included planning for the offshore portion of the commissioning and offshore execution with the pre-commissioning contractor including confirmation of design, heat and mass balancing, and performance testing.

GATE was requested to determine the potential risks involved in waterflood for the Neptune and Shenzi fields as a means to determine whether waterflood was a viable option for enhanced oil recovery. Based on this, GATE developed a waterflood philosophy document that details the problems and possible mitigation procedures for BHP’s use in determining whether or not to waterflood.

GATE provided overall seawater treating and chemical engineering expertise during the design and offshore commissioning phases of the Bonga Project including both topsides seawater treating as well as subsea injection / start-up.