Offshore platforms

Details Offshore platforms Offshore platforms

Category

E - Fixed Constructions

Subcategory

02

Subsubcategory

B

CPC

61/10

IPC codes

E02B 17/02 (2006.01) E21B 43/01 (2006.01)

Type

Patent

Patent number

CA 1290156

Description

ABSTRACT OF THE DISCLOSURE A marine structure, for example an offshore production platform comprises a floating base section, which can be flooded, having caissons thereon and a topsides mounted on the caissons. The caissons comprise at least two telescopic sections, the uppermost section carrying the topsides and the lowermost being mounted on the base. The structure can be installed by supporting the topsides for example, using the derrick of a jack-up rig, and then partially flooding the base section until the jack-up rig is supporting the topsides. On lowering the hook, more of the topsides weight is applied to the base and the structure sinks to the sea-bed where it is secured by grouting. The upper supported section is then lifted to the desired height and the telescopic sections locked. Piling and drill casings, strings etc. may be lowered through the topsides into the hollow regions within the legs.

Application Number

530327

Affiliated with

Also associated with

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