The mission of the JIP was to develop a rational hydrotest alternative methodology for deepwater gas export pipelines, and deliver a draft recommended practice (DRP) for implementation on select pilot projects. The execution of the JIP requires a comprehensive approach in order to develop a hydrotest alternative that is practical and provides the same level of pipeline-integrity assurance as the current hydrotest method.
Project will investigate methodologies for measuring and monitoring hydrogen for safety in advance high strength linepipe steel applications for use in offshore operations as well as onshore uses.
Workshop will be conducted to address the need for an industry-wide dialogue on riser VIV, with the following major objectives;
Current state-of-the-art in riser VIV modeling; Existing experimental data; Existing field experience with deepwater risers, and Recently completed and ongoing studies related to riser VIV; To provide a forum for identifying and discussing uncertainties and technical needs in riser VIV; Identify studies that can provide a path forward to fill the identified gaps, and Identify new ways to collaborate in sharing knowledge and data.
The Deepstar CTR 7501 JIP for High-Pressure, High-Temperature drilling in deep water involves the extension of techniques and technologies developed since the 1950's for floating offshore drilling units. These techniques are well known and generally well-adapted to the deep water environment.
This continued research will improve the current state of understanding regarding the basic mechanisms affecting the seafloor stiffness within the Steel Catenary Riser (SCR) touchdown zone, and develop a means for providing quantitative estimates of seafloor stiffness and damping and their variation over the life of the project for various soil and site conditions.
The objective of this continued research is to further validate that an IICP insulation system incorporating a low thermal conductivity, high strength wire screen mesh between a pipe and an interior liner can be an effective passive thermal insulation solution for deepwater flow lines and risers. Phase II will confirm the low thermal conductance values measured with coupons in Phase I are also attainable for pipes and demonstrate IICP performance under steady and transient flow conditions. Results will be used to interest industry and contractors in this technology.
This project evaluated new and / or improved repair techniques for ageing or damaged structures, such as clamps, underwater welding, use of composite techniques, liners, member replacement or the use of ROVs in repair operations.
The objectives of this study are: To provide a review of subsea processing equipment available in industry and identify uncertainties and challenges related to these technologies.
To perform a risk assessment and evaluate additional implications and risks imposed by applying subsea processing equipment.
Writing and editing the complete set of chapters, along with related tasks, including RP revisions based on comments during review by industry and accepted by the UATG committee.
Experience of deepwater SCR applications in the Gulf of Mexico (GOM) shows that fatigue is usually one of the most challenging feasibility issues for SCR design. Wave loading fatigue contributes significantly to the total fatigue damage, through wave induced vessel motions. This is particularly true for large diameter SCRs.
