Description:

Five wells, planned among two well centers. Production flows to the SeaStar® mini TLP via individual 4 inch diameter insulated steel catenary risers (SCRs). One well center is situated north-northwest of the platform and the other is to the south-southwest. The well centers are 3,000 feet from the TLP. The TLP contains process equipment and serves as the control center. Two 12 inch SCRs exit the TLP to the north-northwest to export the processed oil and gas.

Innovations:

• Titanium Tapered Stress Joint used for suspending the SCRs at the TLP
• High Collapse Resistance (HCR) hoses in a direct hydraulic/electric control umbilical
• Two years from design concept to first oil
• Insulated high pressure 4" flowline SCRs

Scope:

EPIC Contract: Installation of the SeaStar® tension leg platform (TLP), including piled foundations, tendons, hull and deck. JRM is responsible for procuring, designing and installing the flowline/pipeline and subsea systems. Mentor Subsea performed the preliminary design of the subsea system.

JRM managed the detailed design and procured the subsea equipment packages, which included 5 subsea production trees and 2 riser end manifolds (REM) with associated controls, umbilicals, connectors, risers and titanium tapered stress joints. JRM also designed, procured and installed 3 miles of 12" gas export pipelines and 1.7 miles of 12" oil export pipelines, each with 1 mile of 12" SCR. This was all installed using the J-Lay method.

In addition, JRM designed, procured and installed five 4" insulated infield flowlines and SCRs, also using the J-Lay method.

Technology:

• Riser End Manifold(REM)
• Retrievable piping manifold
• Isolates SCR loads to trees and wellheads
• Pigging from platform w/o total field shutdown
• Allows future use of risers for satellite production
• CDTU - Man/Machine Interface through a Direct Hydraulic Control System
• Interface to Intelligent Downhole Completion System (SCRAM's)
• Titanium SCR Stress Joints
• Flowline Coiled Tubing Accessible