Abstract
A pipeline bundle integrates the required flowlines, water injection, gas lift, and control systems necessary for any subsea development and assembles them within a steel carrier pipe. The pipe in pipe (PIP) is one of the simplest pipeline bundles, and the main feature of PIP and pipeline bundle systems is that the pipeline comprises concentric inner and outer pipes. The PIP systems have design features that are not present in conventional pipeline design. In this chapter, the design, fabrication, and installation for both PIPs and bundle systems are detailed. The challenging problems range from the structural design of spacers and internal bulkheads to the understanding of the structural behavior both globally and locally under a variety of loads. Due to the increased number of components in PIP systems compared with conventional pipelines, the design process is therefore more iterative in nature, as the interactions of the components may necessitate design alteration.
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