OTC 21487--Reelable Cost Effective and Enabling Pipeline Technologies

摘要

Over the past year, Technip completed the qualification of two cost effective products for reeling installation. These are mechanically lined pipes (lined pipes) and optimized wall thickness High Frequency Induction (HFI) pipes. Separate successful qualification programs including numerical analyses, full scale and small scale testing were undertaken. Mechanically lined pipe is a very cost effective alternative to solid stainless or metallurgically clad pipelines for the transportation of increasingly corrosive fluids, which is a strongly growing trend. Such product was installed by S-lay in the past and there has been an incentive to qualify it for the very efficient reeling installation method. A number of critical control parameters enabling maintenance of liner integrity throughout the reeling process have been identified. A lined pipe design that can be reeled at atmospheric pressure without compromising the integrity of the liner has been qualified. HFI pipelines are commercially more attractive than the commonly used seamless pipelines. However, some aspects of the HFI pipe technical specifications are not readily adapted to design optimized wall thickness pipelines for reel-lay installation. This paper addresses the resolution of the wall thickness selection of such pipes, for designs governed by reeling. The qualification program provided the justification for using optimized HFI pipe wall thickness for reeling in current projects. Both HFI and lined pipeline products offer significant procurement cost savings to a project. Each technology has reached a qualification maturity, which has led to project applications for some. These products could be combined within a single very cost effective pipe-in-pipe design for challenging flow assurance conditions, in terms of corrosion resistance and wax/hydrate avoidance.