CN110789676A

CN110789676A - Offshore production platform with three groups of truss rack type pile legs

Info

Publication number: CN110789676A
Application number: CN201911079560.XA
Authority: CN
Inventors: 陈旭东; 何力; 陈伶翔; 石霖; 尹石军; 吴锋锋
Original assignee: China Merchants Heavy Industry Jiangsu Co Ltd
Current assignee: China Merchants Heavy Industry Jiangsu Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-02-14

Abstract

The invention discloses a three-group truss rack type pile leg offshore production platform which comprises a main hull, three groups of truss rack type pile legs and pile shoes, wherein lifting devices are arranged on the pile legs, a deck surface of the main hull is a hexagon comprising a tip end area and a square end area, the tip end area is provided with a pile fixing area, the square end area is provided with two pile fixing areas, the pile legs penetrate through the main hull through the pile fixing areas, and a multilayer living area and an operation area on the hull are isolated through an explosion-proof wall. The invention adopts a brand-new layout, uses three groups of truss rack type pile legs to match with the lifting device, reduces the dead weight of the platform on the premise of realizing the functional requirement of the platform, increases variable load by optimizing the layout of the deck surface, and overcomes the inherent defects of the quadrilateral four-group leg type platform.

Description

Offshore production platform with three groups of truss rack type pile legs

Technical Field

The invention relates to the technical field of mobile ocean platforms, in particular to an offshore production platform with three groups of truss rack type pile legs.

Background

Ocean oil gas resources are abundant, huge development prospect is provided, the mobile offshore production platform becomes the key point of domestic attack and customs, most of the type of platform in operation at present is the mobile offshore production platform with four groups of pile legs, the dead weight of the type of platform is large, the influence of sea conditions on the type of four groups of pile leg platforms is large, along with the increasing demand of the mobile offshore production platform, the size and various indexes of variable load of the offshore oil gas production device tend to be large-scale, and therefore higher requirements are provided for the novel mobile offshore production platform which is more convenient and economical to realize.

Three truss rack pile leg formula offshore production platforms of group utilize three truss rack formula spud legs to cooperate elevating gear to accomplish the lift operation of whole platform to three truss rack formula spud leg offshore production platforms of group adopt brand-new deck overall arrangement, and to a great extent reduces the steel quantity, has reduced the platform dead weight, and variable load also can increase for variable load and platform dead weight ratio, the index value of operation depth and dead weight ratio constantly improves.

Disclosure of Invention

In order to solve the defects, the invention aims to provide an offshore production platform with three groups of truss rack type pile legs.

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a three truss rack formula spud legs marine production platforms of group, includes the main hull, runs through three truss rack spud legs of group of main hull and fixes the pile shoe in spud leg bottom portion, be equipped with elevating gear on the spud leg between main hull and the spud leg, the deck face of main hull is for the hexagon including tip region and square end region, the deck face journey isosceles trapezoid shape in tip region, just the central point of tip region puts and is equipped with a firm stake district, the deck face journey rectangle form in square end region, just the both sides in square end region respectively are equipped with a firm stake district, the spud leg runs through the main hull through solid stake district, be equipped with multilayer living area and operation district on the main hull, living area and operation district are kept apart through blast wall.

Further, the length of the tip region accounts for 30% of the total length of the main hull deck, and the length of the square end region accounts for 70% of the total length of the main hull deck.

Furthermore, the truss type rack pile leg is of a three-chord truss type structure which is composed of three vertical pipes embedded with racks, a plurality of horizontal pipes and a plurality of inclined supporting pipes.

Further, the pile shoe is in a square large-volume box shape.

Further, each pile leg is provided with three groups of lifting devices.

Further, the multilayer living area is located on a tip area on one side far away from a square end area, a deck surface of the tip area is in an outward floating mode, and the operation area is located on the square end area.

Furthermore, the lower end of the pile fixing area is provided with a space capable of accommodating a pile shoe.

The invention has the beneficial effects that: the novel deck layout is adopted, three groups of truss rack type pile legs are matched with the lifting device, the self weight of the platform is reduced on the premise of meeting the functional requirements of the platform, the variable load is increased by optimizing the deck layout, and the inherent defects of the quadrilateral four groups of leg type platforms are overcome.

Drawings

FIG. 1 is a side view of the present invention.

Fig. 2 is a schematic plan view of the present invention.

Figure 3 is a schematic view of a leg of the present invention.

Wherein: 1. the device comprises a main hull, 2, pile legs, 3, pile shoes, 4, a lifting device, 5, a tip end area, 6, a square end area, 7, a pile fixing area, 8, a living area, 9, an operation area, 10, an explosion-proof wall, 21, a vertical pipe, 22, a horizontal pipe, 23 and an inclined supporting pipe.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1-3, a three-truss-rack type offshore production platform with pile legs comprises a main hull 1, three sets of truss-rack type pile legs 2 penetrating through the main hull 1, and pile shoes 3 fixed at the bottom ends of the pile legs 2, wherein a lifting device 4 is arranged on the pile legs 2 between the main hull 1 and the pile legs 2, and the lifting operation on the offshore production platform is completed through the lifting device 4.

In the present invention, the deck surface of the main hull 1 is hexagonal including a tip end region 5 and a square end region 6. The deck of the tip area 5 is in an isosceles trapezoid shape, the length of the tip area 5 accounts for 30% of the total length of the deck of the main hull 1, a pile fixing area 7 is arranged at the center of the tip area 5, a group of pile legs 2 penetrate through the tip area 5 through the pile fixing area 7, and three groups of lifting devices 4 are arranged on the pile legs 2. Wherein, tip region 5 keeps away from square end region 6 one side and is equipped with multilayer living area 8, and the deck face of tip region 5 adopts the form of wafing outward, and the topmost layer of multilayer living area 8 can set up to the helicopter platform. The multi-layer living area 8 is arranged close to the broadside outside the meeting of the requirements of the personnel and functions, so that all the weight of the living area 8 and the weight of the main hull of the tip area 5 are distributed on the group of pile legs 2 of the tip area 5. The deck surface of the tip area 5 is in the form of an overboard, reducing the weight of the main hull of the tip area 5, so that the legs 2 on the tip area 5 bear less pressure and the variable load in this area is increased.

The deck of square end region 6 is rectangular, the length of square end region 6 accounts for 70% of the total length of the deck of main hull 1, two sides of square end region 6 are respectively provided with a pile fixing region 7, the other two groups of pile legs 2 respectively penetrate through square end region 6 through two pile fixing regions 7, and three groups of lifting devices 4 are respectively arranged on the two groups of pile legs 2. Wherein, be equipped with operation area 9 on the square end region 6, operation area 9 and the living area 8 on the tip region 5 are separated through blast wall 10. The working area 9 is provided with production modules with larger weight, and the two groups of pile legs 2 at the two sides of the square end area 6 bear the weight of the production modules on the working area 9 besides the weight brought by the main hull 1. The optimized layout of the upper part of the deck of the main hull 1 enables the layout of each functional area to be more reasonable and the weight distribution to be more effective, and the whole variable load of the platform is increased.

In the invention, three groups of truss type rack pile legs 2 are arranged in a triangular shape on the whole platform, and the truss type rack pile legs 2 are of a three-chord truss type structure consisting of three vertical pipes 21 embedded with racks, a plurality of horizontal pipes 22 and a plurality of inclined supporting pipes 23, so that the truss type rack pile leg structure has higher material utilization rate, saves the steel consumption, reduces the wind area and is suitable for more complex sea conditions. In a floating state, the platform of the present invention can take on more deck loads than a four legged offshore production platform.

In the invention, the pile shoe 3 is in a square large-volume box-type shape, the weight of the offshore production platform is transferred to the pile shoe 3 through the three groups of pile legs 2 and then transferred to the seabed through the pile shoe 3, and the square large-volume box-type pile shoe 3 can improve the bearing capacity of seabed soil to the platform, reduce the mud penetration depth of the pile shoe 3 and is more beneficial to the pile pulling operation of the platform. The lower end of the pile fixing area 7 is provided with a space capable of containing the pile shoe 3, so that the shallow water passing capacity of the whole platform can be improved.

Claims

1. The utility model provides a three truss rack formula spud leg offshore production platforms of group which characterized in that: including the main hull, run through three truss-like rack spud legs of three groups of main hull and fix the pile shoe in spud leg bottom portion, be equipped with elevating gear on the spud leg between main hull and the spud leg, the deck face of main hull is the hexagon including tip region and square end region, the deck face journey isosceles trapezoid shape of tip region, just the central point in tip region puts and is equipped with a firm stake district, the deck face journey rectangle form in square end region, just the both sides in square end region respectively are equipped with a firm stake district, the spud leg runs through the main hull through solid stake district, be equipped with multilayer living area and operation district on the main hull, living area and operation district are kept apart through blast wall.

2. The three-set truss rack spud leg offshore production platform of claim 1, wherein: the length of the tip region accounts for 30% of the total length of the main hull deck, and the length of the square end region accounts for 70% of the total length of the main hull deck.

3. The three-set truss rack spud leg offshore production platform of claim 1, wherein: the truss type rack pile leg is of a three-chord truss type structure consisting of three vertical pipes embedded with racks, a plurality of horizontal pipes and a plurality of inclined supporting pipes.

4. The three-set truss rack spud leg offshore production platform of claim 1, wherein: the pile shoe is in a square large-volume box shape.

5. The three-set truss rack spud leg offshore production platform of claim 1 or 3, wherein: and each pile leg is provided with three groups of lifting devices.

6. The three-set truss rack spud leg offshore production platform of claim 1, wherein: the multilayer living area is located on a tip area on one side far away from a square end area, a deck surface of the tip area adopts an outward floating form, and the operation area is located on the square end area.

7. The three-set truss rack spud leg offshore production platform of claim 1, wherein: and the lower end of the pile fixing area is provided with a space capable of accommodating a pile shoe.