| 摘要 |
PCT No. PCT/GB90/01720 Sec. 371 Date Jul. 18, 1991 Sec. 102(e) Date Jul. 18, 1991 PCT Filed Nov. 8, 1990 PCT Pub. No. WO91/07544 PCT Pub. Date May 30, 1991.A concrete or the like mattress for laying over a pipeline on the seabed comprises an elongate recess or tunnel (5) having an insulating material (6) located therein. The mattress is laid over a subsea pipeline so that the pipeline is received within the insulant-containing tunnel. The pipeline is thus physically protected and thermally insulated. The mattress can comprise a plurality of concrete or like members (1,2,2',3,3') articulated together. |
