CN216552048U - Novel split type jacket structure for longitudinal floating installation of shallow water blocks - Google Patents

Abstract

The utility model discloses a novel split type jacket structure for longitudinal floating installation of a shallow water block, which comprises a split type jacket, wherein the front side of the split type jacket is fixedly provided with a jacket main leg, and the front side of the split type jacket is fixedly connected with a jacket auxiliary leg; this a novel split type jacket structure for installation of shallow water chunk vertically floats and holds in palm between four main legs through the unilateral, links as an organic whole through welding through horizontal lacing wire and oblique pull rod. The four auxiliary legs and the four adjacent main legs are welded together through horizontal lacing wires and diagonal braces to form a frame, and a water-proof sleeve is arranged in the frame. After the floating support of the block is installed, the eight main legs of the jacket are butt-welded with the eight legs of the block, and the jacket structure plays a predetermined role in bearing the load of the block, the dead weight and the environmental load of the platform.

Description

Novel split type jacket structure for longitudinal floating installation of shallow water blocks

Technical Field

The utility model relates to the technical field of ocean engineering, in particular to a novel split jacket structure for longitudinal floating installation of shallow water blocks.

Background

At present, a conventional central platform or drilling and production platform with a shallow water jacket in a water depth range of about 12 meters and a chunk weight of over ten thousand tons generally adopts an eight-leg jacket platform, and the chunk is installed in a block hoisting mode. The conventional eight-leg jacket scheme (or eight main legs and four auxiliary legs scheme) is that a jacket is provided with eight main legs (or eight main legs and four auxiliary legs), 2-3 horizontal layers and a vertical surface A/B/1/2/3/4 and is composed of X-shaped/K-shaped/V-shaped/W-shaped lacing wires. The jacket does not need an auxiliary construction frame, and can meet the requirements on the strength and rigidity of the jacket in the stages of construction, shipment, towing, hoisting and bottom seating through the self structural design.

The prior art has the following defects or problems: in some projects, when construction resources are limited or installation modes are limited or the scheme of floating installation of the blocks is more economical, the jacket needs to be designed into a slotted jacket which is suitable for the longitudinal floating installation of the blocks. However, this type of jacket solution has the following problems:

1. because the water depth is shallow, the ship draft requirement when the floating support of the block is installed is considered, the lower part of the floating support notch of the jacket cannot be designed into an X/K/V/W type strong connection mode, and the jacket cannot meet the strength and rigidity requirements under the working conditions of construction, shipment, towing, hoisting and bottom sitting.

2. If the jacket is designed into two independent small jackets and the two small jackets are respectively installed, the overall unevenness of the two small jackets is difficult to guarantee, and the relative positioning precision between the two small jacket pipe legs cannot ensure to meet the precision requirement of the floating and supporting installation of the blocks.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a novel split jacket structure for longitudinal floating installation of a shallow water block. The four main legs of the shaft A of the split jacket and the four main legs of the shaft B of the split jacket are not connected, and the split jacket is a hollow notch for longitudinally floating and mounting the blocks. The guide pipe frame is required to be constructed by an auxiliary construction frame in the construction and construction stages, so that the guide pipe frame can meet the standard requirements on strength and rigidity. Meanwhile, the auxiliary construction frame can coordinate the distance between the main legs of the shaft A and the shaft B of the split jacket and the overall unevenness, so that the precision requirement of floating and supporting installation of the blocks can be met. By adopting the jacket scheme, the floating installation of the blocks in the shallow sea area can be realized, so that the floating crane resources of the blocks can be optimized, the aim of saving project investment is fulfilled, and the problems in the background art are solved.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a novel split type jacket structure for shallow water chunk vertically floats and holds in palm installation, includes split type jacket, the front fixed mounting of split type jacket has jacket main leg, the leg is assisted to the front fixedly connected with jacket of split type jacket, the inside fixed mounting of split type jacket has supplementary construction frame, the horizontal lacing wire of center fixedly connected with facade of jacket main leg, the center fixed mounting of facade horizontal lacing wire has the facade to pull one side, the inside fixedly connected with plane horizontal lacing wire and the plane vertical lacing wire of leg are assisted to the jacket, the inside fixed mounting of leg is assisted to the jacket has the plane to pull one side, the back fixedly connected with water proof sleeve of leg is assisted to the jacket.

As the preferred technical scheme of the utility model, the split jacket is a space frame structure formed by welding eight groups of jacket main legs and four groups of jacket auxiliary legs with a wellhead.

As a preferred technical scheme of the utility model, after the jacket main legs and the jacket auxiliary legs are installed, a connecting structure is not arranged between the four jacket main legs of the shaft A and the four jacket main legs of the shaft B, and a notch is formed between the shaft A and the shaft B and used for floating and supporting installation of the blocks.

As a preferred technical scheme of the utility model, during the service period of the jacket main legs, the eight main legs of the jacket main legs are connected with the eight main legs of the blocks, the jacket auxiliary legs are not connected with the blocks, and the load of the blocks is transferred to the pile foundation through the eight main legs of the jacket main legs.

As a preferable technical scheme of the utility model, the vertical surfaces A/B/A1/B1 of the main leg and the auxiliary leg of the jacket, the vertical surfaces between the three/four inner shafts A and A1 and the vertical surfaces between the shafts B and B1 are constructed by pull ribs of any type of X-type/K-type/V-type/W-type; the horizontal layers of the main leg and the auxiliary leg of the jacket are constructed by a plane transverse lacing wire, a plane vertical lacing wire and a plane diagonal bracing wire.

As the preferred technical scheme of the utility model, the split jacket structures at two sides of the notch are connected together by an auxiliary construction frame in the construction and construction stages of the jacket, so that the split jacket structures can meet the requirements on strength and rigidity in the construction and construction stages; meanwhile, the relative positions of the split type guide pipe legs and the integral unevenness of the jacket can be ensured, so that the requirement of block floating support installation on the installation precision of the jacket is met.

Compared with the prior art, the utility model provides a novel split type jacket structure for longitudinal floating installation of shallow water blocks, which has the following beneficial effects:

1. according to the novel split jacket structure for the longitudinal floating installation of the shallow water blocks, the split jacket 1, the jacket main leg 2 and the jacket auxiliary leg 3 are arranged, so that the strength and rigidity problems of the jacket construction stage of the floating installation of the blocks in a water depth range of about 12 meters are solved, and meanwhile, the relative error of pile legs of the jacket can be ensured to meet the floating installation requirements of the blocks;

2. this a novel split type jacket structure for shallow water chunk vertically floats and holds in palm installation through setting up supplementary construction frame 4, through can realizing the vertical superficial installation of holding in the palm of shallow water sea territory chunk with the help of supplementary construction frame 4, and then designs optimal chunk and jacket construction scheme, can effectively reduce the development investment cost in oil field.

Drawings

Fig. 1 is a schematic view of a split jacket according to the present invention.

FIG. 2 is a schematic view of an auxiliary construction frame according to the present invention.

Fig. 3 is a schematic view illustrating the split jacket of the present invention being coupled with an auxiliary construction frame.

Fig. 4 is a schematic view showing the general plan arrangement of the split jacket and the auxiliary construction frame according to the present invention.

Fig. 5 is a schematic view of a split jacket elevation a/B according to the present invention.

FIG. 6 is a schematic view of a split jacket elevation A1/B1 according to the present invention.

Fig. 7 is a three/four schematic view of the split jacket elevation of the present invention.

Fig. 8 is a schematic plan view of the split jacket of the present invention.

In the figure: 1. a split jacket; 2. a jacket main leg; 3. a jacket auxiliary leg; 4. auxiliary construction of the frame; 5. a vertical face horizontal lacing wire; 6. vertical plane diagonal braces; 7. a plane transverse lacing wire; 8. a plane vertical tie bar; 9. a planar diagonal brace; 10. a riser pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1-8, in this embodiment: a novel split type jacket structure for longitudinal floating installation of a shallow water block comprises a split type jacket 1, a jacket main leg 2 is fixedly installed on the front side of the split type jacket 1, a jacket auxiliary leg 3 is fixedly connected on the front side of the split type jacket 1, an auxiliary construction frame 4 is fixedly installed inside the split type jacket 1, a vertical face horizontal pull rib 5 is fixedly connected at the center of the jacket main leg 2, a vertical face diagonal pull rib 6 is fixedly installed at the center of the vertical face horizontal pull rib 5, a plane transverse pull rib 7 and a plane vertical pull rib 8 are fixedly connected inside the jacket auxiliary leg 3, a plane diagonal pull rib 9 is fixedly installed inside the jacket auxiliary leg 3, a water-resisting sleeve 10 is fixedly connected at the back side of the jacket auxiliary leg 3, the water depth of a certain project jacket platform is 11.9m, the block is longitudinally floating installation, eight groups of jacket legs 2 and four groups of jacket auxiliary legs 3 are adopted as the jacket, the distance between the main axes A, B is 40 meters, the diameter of the steel pile in the main leg 2 of the jacket is 96 inches, the diameter of the auxiliary pile in the auxiliary leg 3 of the jacket is 48 inches, the weight of the floating block is about 13200 tons, SACS professional software is adopted to carry out simulation calculation on the jacket and the auxiliary construction frame 4, the auxiliary construction frame 4 and the jacket reasonably simulate connection constraint according to the actual connection mode, the overall analysis is carried out on the jacket and the auxiliary construction frame 4 through the mode, the analysis design of working conditions such as ship loading, towing, hoisting, bottom seating and the like of the jacket is completed, the weight of the jacket of the project is about 1800 tons, the weight of the auxiliary construction frame 4 is about 500 tons, and the installation of the split jacket 1 can be realized according to the specific implementation steps.

In the embodiment, the split jacket is a space frame structure formed by welding eight jacket main legs 2 and four jacket auxiliary legs 3 with a wellhead. After the jacket main legs 2 and the jacket auxiliary legs 3 are installed, no connecting structure exists between the four jacket main legs 2 of the shaft A and the four jacket main legs 2 of the shaft B, a notch is formed between the shaft A and the shaft B and used for floating and supporting the blocks, the four jacket main legs 2 on one side are welded together through vertical face horizontal pull ribs 5 and vertical face diagonal pull ribs 6, the eight main legs of the jacket main legs 2 are connected with the eight main legs of the blocks during service of the jacket main legs 2, the jacket auxiliary legs 3 are not connected with the blocks, and loads of the blocks are transmitted to a pile foundation through the eight main legs of the jacket main legs 2. The four jacket auxiliary legs 3 and the adjacent four jacket main legs 2 are welded together through vertical surface horizontal lacing wires 5 and vertical surface diagonal bracing wires 6 to form a frame, a plane transverse lacing wire 7, a plane vertical lacing wire 8 and a plane diagonal bracing wire 9 are arranged in a horizontal layer of the frame, and a water-resisting sleeve 10 is arranged in the frame. The vertical surfaces A/B/A1/B1 of the jacket main leg 2 and the jacket auxiliary leg 3, the vertical surfaces between the three/four inner A1 and the shaft A and between the B1 and the shaft B are constructed by certain types of lacing wires in X-type/K-type/V-type/W-type; the horizontal layer for connecting the main leg 2 and the auxiliary leg 3 of the jacket is composed of a plane transverse lacing wire 7, a plane vertical lacing wire 8 and a plane diagonal lacing wire 9, the split jacket 1 is built on a land building site, the jacket can be built in a split mode and integrally assembled, or the split jacket is built one rod by one rod or by combining the two previous building schemes, after the split jacket 1 is built, an auxiliary construction frame 4 is arranged in a notch between an A shaft and a B shaft of the split jacket 1, the auxiliary construction frame 4 connects the split jacket 1 structures at the two sides of the notch together, the rigidity of the split jacket 1 is enhanced, the split jacket 1 and the auxiliary construction frame 4 bear the force together, so that the split jacket 1 structure can meet the requirements of strength and rigidity at each construction stage, meanwhile, the relative positions of the main legs 2 of the jacket of the split jacket 1 and the overall unevenness of the split jacket 1 can be ensured. In the construction and construction stage of the conduit frame, the split type conduit frame structures on the two sides of the notch are connected together by means of the auxiliary construction frame 4, so that the split type conduit frame structures can meet the requirements on strength and rigidity in the construction and construction stage; meanwhile, the relative position of the main leg 2 of the jacket of the split jacket 1 and the unevenness of the whole jacket can be guaranteed, so that the requirement of the floating support installation of the split jacket on the installation precision of the jacket is met, the split jacket 1 and the auxiliary construction frame 4 are dragged together for shipment, transportation, hoisting and bottom-sitting construction, the split jacket 1 is launched in a hoisting mode for installation, and after the bottom-sitting of the jacket is completed, the steel pipe piles are driven into the jacket from the main leg 2 of the jacket and the auxiliary leg 3 of the jacket. The auxiliary construction frame 4 is dismantled after the pile driving operation is accomplished, forms a spacious notch between split type jacket 1's A axle and B axle, and the chunk vertically floats in this notch and holds in the palm the installation chunk, and eight main legs of chunk and eight main leg welding of jacket are even as an organic whole, and four of jacket are assisted the leg and are not connected with the chunk. After the blocks are installed, the jacket structure takes on the preset functions of bearing the block load, the dead weight and the platform environment load.

The working principle and the using process of the utility model are as follows: a user builds a jacket on a land slideway, the jacket can be built into an integral assembly in a slicing mode, or built by rod pieces one by one, or the jacket is built by combining the former two building schemes, an auxiliary construction frame 4 is built again, the auxiliary construction frame 4 is installed in a split jacket notch, the split jacket and the auxiliary construction frame 4 are connected into a whole and are stressed together, the split jacket and the auxiliary construction frame 4 are integrally pulled to ship and towed to a platform installation site, the jacket and the auxiliary construction frame 4 are integrally hoisted by a floating crane, jacket lowering and bottom seating construction are carried out, after bottom seating of the split jacket is finished, steel pipe piles are inserted into main legs 2 and auxiliary legs 3 of the jacket, piling operation is carried out, after piling is finished, leveling and fixing the jacket, the auxiliary construction frame 4 is cut to be connected with the jacket, the auxiliary construction frame 4 is hoisted and moved out of the jacket notch, grout is poured between the main leg 2 of the jacket and the auxiliary leg 3 of the jacket and the steel pile, the main leg 2 of the jacket and the auxiliary leg 3 of the jacket are connected with the steel pile into a whole, crown plates are welded and the like to complete the installation of the jacket, a waterproof casing 10 is driven in, a block is installed in a floating mode, eight legs of the block are in butt joint with the eight main legs of the jacket and are welded into a whole to complete the installation of the block, and the jacket bears the preset functions of self weight, block load and environmental load.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. The utility model provides a novel split type jacket structure that is used for shallow water chunk to vertically float and holds in palm installation which characterized in that: including split type jacket (1), the front fixed mounting of split type jacket (1) has jacket owner leg (2), leg (3) are assisted to the front fixedly connected with jacket of split type jacket (1), the inside fixed mounting of split type jacket (1) has supplementary construction frame (4), center fixedly connected with facade horizontal lacing wire (5) of jacket owner leg (2), the center fixed mounting of facade horizontal lacing wire (5) has facade diagonal draw (6), inside fixedly connected with plane horizontal lacing wire (7) and the plane vertical lacing wire (8) of leg (3) are assisted to the jacket, the inside fixed mounting of leg (3) is assisted to the jacket has plane diagonal draw (9), the back fixedly connected with water proof sleeve pipe (10) of leg (3) is assisted to the jacket.

2. The novel split jacket structure for the longitudinal floating installation of the shallow water blocks as claimed in claim 1, wherein: the split jacket is a spatial frame structure formed by welding eight groups of jacket main legs (2) and four groups of jacket auxiliary legs (3) with a well head.

3. The novel split jacket structure for the longitudinal floating installation of the shallow water blocks as claimed in claim 1, wherein: after the jacket main legs (2) and the jacket auxiliary legs (3) are installed, a connecting structure is not arranged between the four jacket main legs (2) of the shaft A and the four jacket main legs (2) of the shaft B, and a notch is formed between the shaft A and the shaft B and used for floating and supporting the blocks.

4. The novel split jacket structure for the longitudinal floating installation of the shallow water blocks as claimed in claim 1, wherein: during the service period of the split type jacket (1), the eight main legs (2) of the split type jacket (1) are connected with the eight main legs of the blocks, the auxiliary legs (3) of the jacket are not connected with the blocks, and the load of the blocks is transmitted to the pile foundation through the eight main legs (2) of the split type jacket (1).

5. The novel split jacket structure for the longitudinal floating installation of the shallow water blocks as claimed in claim 1, wherein: the vertical surfaces A/B/A1/B1 of the jacket main leg (2) and the jacket auxiliary leg (3), the vertical surfaces between the three/four inner A1 and the A shaft, and the vertical surfaces between the B1 and the B shaft are constructed by pull ribs of one type of X-type/K-type/V-type/W-type; the horizontal layers of the main leg (2) and the auxiliary leg (3) of the jacket are constructed by a plane transverse lacing wire (7), a plane vertical lacing wire (8) and a plane diagonal lacing wire (9).

Images