Project Description:
Two submarine pipelines laying from Chenghai 1-1 island to platform, each pipeline is 12km long. The mixed transmission pipeline is double-layer insulated with inner diameter of 323.9mm and outer diameter of 457mm, water injection pipeline is single-layer with a diameter of 168.3mm. Work scope: offshore pipeline pre-trenching (1200m), pipeline laying (6km), riser and spool installation (2pcs), post-trenching (4.8km), sandbag back filling (200m3), bulk bags ballast (480pcs), back filling with excavated material (1.2km), platform riser and pipeline sinking construction (2pcs).
