Guiding assembly for a piping system

摘要

A guiding assembly for a riser piping system (2) in an opening in the bottom (8) of a floating structure, said assembly permitting limited axial and angular displacement of the riser piping system (2) in said opening. The assembly comprises a prismatic anchor (1) surrounding a portion of the riser piping system (2) and being connected thereto, an outer prismatic guide tube (4) receiving the prismatic anchor (1), the outer prismatic guide tube (4) having inner surfaces that are parallel to and equally spaced from outer surfaces on the prismatic anchor (1), and rollers (3) arranged in at least two different levels and confined in spaces (2) formed between said inner and outer surfaces, the rollers (3) permitting relative axial movement between the prismatic anchor (1) and the outer prismatic tube (4).

主权项

1. A guiding assembly for a riser piping system (2) in an opening in the bottom (8) of a floating structure, said assembly permitting limited axial and angular displacement of the riser piping system (2) in said opening, said assembly comprising:
a prismatic anchor (1) surrounding a portion of the riser piping system (2) and being connected thereto, an outer prismatic guide tube (4) receiving the prismatic anchor (1), the outer prismatic guide tube (4) having inner surfaces that are parallel to and equally spaced from outer surfaces on the prismatic anchor (1), the anchor and guide tube being at least substantially triangular in cross-section, and rollers (3) arranged in at least two different levels and confined in spaces (2) formed between said inner and outer surfaces, the rollers (3) permitting relative axial movement between the prismatic anchor (1) and the outer prismatic tube (4) without being fixed to any of said inner and outer surfaces.