RiserTec Scope of Work –

Basic methodology is fairly standard and involves data review and screening of vessel motions to identify worst case motions for different headings over a realistic range of periods.  By adjusting range of laybacks we can determine widest installation window and confirm feasibility of the initiation, lay and lay-down stages.   Based on final agreed values of seastate and layback it is possible to produce lay tables and other output such as curve allowable radii, maximum expected chute and seabed tensions and vessel and seabed object clearances.  In addition optimum vessel setup can be identified for the actual wave and current occurring during the onsite installation.

The purpose of the work is to identify to the client what are the critical aspects of the procedure (risks) and the possible steps available at each stage to take should for example something go wrong with installation equipment or vessel so that the product is not damaged.

RiserTec has carried out original and verification analyses for both Operator and Installation Contractors for both rigid and flexible pipes, cables and umbilical in both the Oil and Gas and Renewables sectors.  If required we can generate the installation procedures and lay tables for initiation and abandonment.

In addition to the lay analyses we can carry out trenching analyses and on-bottom roughness assessment for flexible and rigid flowlines and including where required  UHB assessment for as laid conditions.