FOUNDATION ARRANGEMENT FOR AN OFFSHORE FRAMEWORK CONSTRUCTION OR SUBSEA INSTALLATION

摘要

Foundation arrangement for an offshore framework construction or subsea installation for use in oil or gas operations and the like, in particular where the seabed consists of relatively solid sand or of clay, and the framework construction or subsea installation comprises a number of separate legs (8) being rigidly connected to each other and having each a separate foundation on the seabed. Each of at least three separate legs (8) is provided at its lower end with at least one downwardly open chamber (3) which in a manner known per se comprises side walls or skirts adapted to penetrate down (5) into the sand or clay seabed. The chamber or chambers (3) at each leg (8) has (have) an associated suction or pump means (7) which can be individually controlled for establishing a sufficient, relative underpressure in each chamber (3) to withstand a predetermined upward force acting through the leg (8) concerned.