Patent ID: 6644409
Filing Date: 2003-11-11
Classification: E21B

Abstract:
A riser guide system for use on a floating offshore platform, the platform comprises a topside and a substructure having a lower pontoon, at least one riser extends from a subsea location to the topside, the system comprising:a permanent guide having the shape of a housing and having a through-going opening for the riser, the permanent guide being secured to the pontoon, a primary guide having the shape of a housing and having a through-going opening for the riser, the primary guide being located in the permanent guide and being longitudinally divideable in two or more mechanically interconnectable parts, a secondary guide having the shape of a housing and having a through-going opening for the riser, the secondary guide being located in the primary guide, and riser guides located in the secondary guide and facing the riser.