Relocatable self-elevating drilling production platform and self-installing and recycling method thereof

Abstract

The invention relates to a relocatable self-elevating drilling production platform and a self-installing and recycling method thereof. The platform comprises an upper box platform, an upper assembling block, pile legs and a drill conductor supporting and protecting mechanism. The drill conductor supporting and protecting mechanism comprises a plurality of perpendicular round steel pipes, a plurality of horn mouth guiding parts, mud mats, a wellhead area horizontal layer and multiple layers of horizontal round steel pipes, wherein the perpendicular round steel pipes are evenly arranged at intervals in an array mode, the horn mouth guiding parts are arranged at the top ends of the perpendicular round steel pipes, the mud mats are arranged at the bottoms of the perpendicular round steel pipes, the wellhead area horizontal layer is arranged on the parts, below the horn mouth guiding parts, of the perpendicular round steel pipes, and each layer of horizontal round steel pipes are arranged between every two longitudinally or transversely adjacent perpendicular round steel pipes. Multiple sets of supporting and protecting mechanism lifting devices are arranged on the two sides of a well head area at the stern of the upper box platform. The upper end of each pile leg penetrates through the upper box platform and is connected with the upper box platform through a pile leg lifting device. The relocatable self-elevating drilling production platform can be used repeatedly, all facilities can be self-installed, drill conductors can be supported and protected, and the defects that a floating crane is needed for installing and abandoning a fixed type platform, and a self-elevating platform cannot support or protect the drill conductors are overcome.

Description

technical field [0001] The present invention relates to a drilling and production equipment in the field of ocean engineering and its installation and recovery method, in particular to a relocatable self-elevating drilling production platform with a waterproof casing support protection mechanism and its self-installation and recovery method. Background technique [0002] At present, the exploration technology of medium-scale oil and gas fields in shallow water areas in domestic seas has become mature, and there are fewer and fewer newly discovered large and medium-sized oil and gas fields, and a large part of them belong to the category of marginal oil fields, which are characterized by low total oil production and short economic recoverable life. . For the development of such marginal oil fields, if conventional technology and equipment are used, it is difficult to obtain a satisfactory return on capital. In order to obtain relatively good economic benefits, the platforms...

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Problems solved by technology

Simple jacket platforms are widely used in marginal oilfields in domestic sea areas, but because they are fixed platforms, equipment and facilities cannot be reused, and due to structural limitations, floating cranes are required for offshore installation, which is expensive. All production facilities must be abandoned, and the disposal fee for fixed platforms may even be higher than the installation fee; conventional jack-up platforms have a small number of application cases in China. Although they have the advantages of relocation and self-installation, the existing jack-up platforms It cannot provide effective support and protection for the water riser casing, and an additional fixed water riser protection platform needs to be built. The construction, construction and disposal of this protection platform are very expensive and cannot be reused

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