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.
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.
Alaska's often harsh environment has created unique challenges for the Oil and Gas industry both onshore and offshore. To better understand the challenges characteristic of artic environments, their impacts, and possible solutions, MMS contracted with Det Norske Veritas (DNV) to provide a workshop on the fundamentals, technical issues, and remediation of VIV of free spanning pipelines in Cook Inlet, strudel scour in Beaufort sea, and wind-induced vibrations for elevated pipelines on the North Slope.
This project will investigate the major classes of pipeline failure that resulted to GOM OCS facilities by Hurricane Lili in the Fall of 2002. The project will have four objectives: Investigate pipeline failures resulting from Hurricane Lili, including flowlines, major trunk lines and platform risers from both fixed and floating production facilities;
Compare and contrast these failures with those reported from Hurricane Andrew;
Make specific recommendations for changes in design or operations guidelines that might prevent or mitigate such failures in the future.
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.
Develop a cathodic protection design protocol for deep water petroleum production compliant rises. Results should provide for an Interactive software package on anode/pipeline design, final report and a presentation to industry on software demonstration and project results.
The project was designed to evaluate, develop, and improve project readiness of technologies for solutions for the Touch Down Zone (TDZ) region of Steel Catenary Risers (SCRs) used for deepwater development. There is often insufficient time during the system selection phase for a project team to undertake a comprehensive investigation of potential SCR performance and therefore any selection often later requires timely and costly alterations to other parts of the system in order to mitigate difficulties with the SCRs.
Hydrogen cracking is a major problem associated with in-service pipelines, especially high strength steel pipelines. high concentrations of hydrogen in steel can lead to damage in the form of internal pores and structural flaws, formation of hydrides, and hydrogen-assisted cracking, all of which reduce the physical and mechanical properties of linepipe. Hydrogen can be introduced into the linepipe in numerous ways; for example, through manufacturing, welding procedures, cathodic protection, corrosion reactions with the environment, and interaction with the pipe's internal media.
