A relocatable self-elevating drilling production platform and its self-installation and recovery method
A production platform, self-elevating technology, applied in the direction of floating buildings, etc., can solve the problems of high cost of construction, construction and disposal of protection platforms, inability to effectively support and protect water risers, and non-reusable equipment and facilities. The number of platform facilities, the effect of reducing the risk of towing at sea and ensuring the stability of towing
Active Publication Date: 2017-10-20
CHINA NAT OFFSHORE OIL CORP +1
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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
Method used
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[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0026] Such as figure 1 , figure 2 As shown, the present invention includes an upper box platform 1 , a waterproof casing support and protection mechanism 2 , pile legs 3 and a drilling block 4 . Wherein, the top surface of the upper box platform 1 is laid with a main deck 5 , and the upper block 4 is arranged on the main deck 5 . A wellhead area 6 for drilling is provided at the stern of the upper box platform 1 , and the water-resistant casing support and protection mechanism 2 and the water-resistant casing 7 are installed in the wellhead area 6 .
[0027] The water riser support and protection mechanism 2 includes several vertical steel round pipes 8 (the number of vertical steel round pipes 8 is equal to the number of the water riser pipes 7 to be supported), several bell mouth guides 9, An anti-settling plate 10, a horizontal layer 11 in the...
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The invention relates to a relocatable self-elevating drilling production platform and its self-installation and recovery method. The protective mechanism includes several vertical steel circular tubes in an evenly spaced array, several bell mouth guides set at the top of the vertical steel circular tubes, anti-sinking plates set at the bottom of the vertical steel circular tubes, and set at the bell mouth Guide the horizontal layer of the wellhead area on the vertical steel round pipe below, and several layers of horizontal steel round pipes arranged between two vertical steel round pipes adjacent in the longitudinal and transverse directions; several sets of support and protection mechanisms are lifted The device is arranged on both sides of the wellhead area at the stern of the upper box platform; the upper end of each leg passes through the upper box platform and is connected to the upper box platform through a leg lifting device. The invention is reusable, can realize the self-installation of all facilities and can provide support and protection for the water-resistant casing, and solves the problem that the fixed platform needs to use a floating crane for installation and disposal, and the self-elevating platform cannot provide the support and protection of the water-resistant casing disadvantages.
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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IPC IPC(8): B63B35/44
Inventor 李达付殿福白雪平王朝阳苏云龙徐正海何骁勇沈晓鹏张炜王丽勤
Owner CHINA NAT OFFSHORE OIL CORP