CN111391986B - Floating type launching truss and jacket comprising same - Google Patents
Floating type launching truss and jacket comprising same Download PDFInfo
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- CN111391986B CN111391986B CN202010227797.4A CN202010227797A CN111391986B CN 111391986 B CN111391986 B CN 111391986B CN 202010227797 A CN202010227797 A CN 202010227797A CN 111391986 B CN111391986 B CN 111391986B
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- truss
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0056—Platforms with supporting legs
- E02B2017/006—Platforms with supporting legs with lattice style supporting legs
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Abstract
The invention relates to a floating launching truss, comprising: the water outlet truss structure comprises a water outlet truss water outlet leg, a water outlet truss water outlet leg and a water outlet truss support rod, wherein the water outlet truss support rod comprises a water outlet truss horizontal support rod and a water outlet truss vertical support rod; and the connecting rod is arranged on each horizontal supporting rod of the launching truss, is positioned above a horizontal plane formed by the launching legs of the launching trusses and is connected with the supporting rod of the jacket. The launching truss is an independent structure relative to the jacket, can replace a horizontal layer of the jacket to provide support for the riser, optimizes the overall structure of the jacket and saves material cost.
Description
Technical Field
The invention relates to a floating launching truss and a jacket comprising the same, and belongs to the field of ocean oil and gas development equipment.
Background
With the continuous promotion and development of offshore oil and gas field development in China, the offshore oil and gas field development is relatively mature, and in recent years, the offshore oil and gas field development is gradually developed from the water depth within 50m to 100-300 m. A batch of oil and gas fields with the water depth of 300-400 m are discovered in the south China sea area in succession, and for the development of the offshore oil and gas fields in the water depth range, the fixed jacket platform has the characteristics of mature and reliable technical scheme and high economical efficiency under the common condition. The jacket in the water depth is different from a diving jacket installed by hoisting launching, a sliding launching installation mode is usually adopted, and a launching truss is a necessary device for sliding launching. The traditional launching truss usually transmits the stress to the main leg and the main structural rod of the jacket, and the main leg and the main structural rod of the jacket need to be increased in size or increased in wall thickness due to the increase of the stress, so that the steel weight of the whole jacket is increased.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a floating type launching truss and a jacket including the same, in which the launching truss designed by the present invention is an independent structure with respect to the jacket, and is disposed outside a riser pipe, so that a horizontal layer of the jacket can be replaced to provide support for the riser pipe, unnecessary horizontal layers of the jacket are reduced, the overall structure of the jacket is optimized, and material cost and investment cost are saved.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a floating launching truss, comprising the following components:
the water-saving jacket comprises a lower water truss lower water leg 1 and a lower water truss upper water leg 2, wherein the lower water truss lower water leg 1 is positioned below the lower water truss upper water leg 2, and a plurality of lower water truss lower water legs 1 and a plurality of lower water truss upper water legs 2 are horizontally arranged below the jacket and distributed in a polygonal shape;
the lower water truss structure comprises lower water truss support rods 3, wherein each lower water truss support rod 3 comprises a lower water truss horizontal support rod 301 and a lower water truss vertical support rod 302, and a plurality of lower water truss horizontal support rods 301 are arranged between two adjacent lower water truss lower water legs 1 and a plurality of lower water truss upper water legs 2 are sequentially and alternately connected through the lower water truss vertical support rods 302 between the lower water truss lower water legs 1 and the lower water truss upper water legs 2 to form a polygonal truss structure;
the internal support rod 4 of the launching truss is arranged inside the truss structure;
and the connecting rod 5 is arranged on each horizontal supporting rod 301 of the lower water truss, is positioned above a horizontal plane formed by the water feeding legs 2 of the lower water truss and is used for being connected with the supporting rod of the jacket body.
The floating type launching truss is characterized in that preferably, 2 launching truss launching legs 1 and 2 launching truss launching legs 2 are horizontally arranged below the jacket and distributed in a quadrilateral shape.
The floating type launching truss preferably further comprises a riser pipe 6 arranged inside the truss structure.
Floating truss of launching, preferably, the inside bracing piece 4 of truss of launching includes the inside bracing piece 401 of a plurality of trusses of launching, the inside bracing piece 401's of truss of launching one end with the truss of launching leg 2 is connected, the other end with the truss of launching leg 1 is connected, and is located adjacent two form the X type structure between the truss of launching bracing piece 3.
The floating type launching truss is characterized in that preferably, two launching truss internal inclined support rods 401 are symmetrically distributed on two sides of one corresponding launching truss support rod 3 to form an umbrella-shaped structure, more preferably, one end of each launching truss internal inclined support rod 401 is connected with a launching truss upper water leg 2, and the other end of each launching truss internal inclined support rod 401 is connected with a launching truss lower water leg 1.
The floating type launching truss is preferably characterized in that the launching truss internal support rod 4 comprises a plurality of launching truss internal inclined support rods 401 and a plurality of launching truss internal vertical support rods 402, the two launching truss internal inclined support rods 401 are symmetrically distributed on corresponding one sides of the launching truss internal vertical support rods 402 to form umbrella-shaped structures, the umbrella-shaped structures are located between the two adjacent launching truss support rods 3, and more preferably, the two ends of the launching truss internal inclined support rods 401 and the launching truss internal vertical support rods 402 are respectively connected with the launching truss upper water leg 2 and the launching truss lower water leg 1.
The floating type launching truss is characterized in that preferably, the launching truss internal support rods 4 comprise a plurality of launching truss internal inclined support rods 401, a plurality of launching truss internal vertical support rods 402 and a plurality of launching truss internal horizontal support rods 403, two launching truss internal inclined support rods 401, one launching truss internal vertical support rod 402 and one launching truss internal horizontal support rod 403 form a structure shaped like a Chinese character 'mi', and the structure shaped like a Chinese character 'mi' is positioned between two adjacent launching truss support rods 3; more preferably, both ends of the internal diagonal support bar 401 of the launching truss, the internal vertical support bar 402 of the launching truss and the internal horizontal support bar 403 of the launching truss are respectively connected with the upper water leg 2 of the launching truss and the lower water leg 1 of the launching truss.
The floating type launching truss, preferably, the riser 6 is arranged on one or two of the internal inclined supporting rod 401 of the launching truss, the internal vertical supporting rod 402 of the launching truss or the internal horizontal supporting rod 403 of the launching truss.
The floating type launching truss is preferably a round pipe with the diameter of 0.914m, 1.067m or 1.219m, wherein the diameter of the launching truss internal inclined supporting rod 401, the launching truss internal vertical supporting rod 402 and the launching truss internal horizontal supporting rod 403 are round pipes.
The floating type launching truss is preferably a round pipe with the diameter of 1.067m, 1.219m or 1.372m of the connecting rod 5.
A second aspect of the invention provides a jacket comprising a jacket body, which is supported on the connecting rods 5, and further comprising a floating launch truss according to any one of the first aspects of the invention.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. according to the invention, the connecting rods are arranged on the launching truss and connected with the supporting rods of the jacket, so that the connection with the main legs or the main structural rods of the jacket is avoided, the least force is transmitted to the main structure of the jacket through the least connection, the stress of the main legs and the main structural rods of the jacket is reduced, the size and the wall thickness of the jacket are reduced, the overall weight of the jacket is reduced, and the production and installation costs of the jacket are reduced;
2. the launching truss designed by the invention is an independent structure relative to the jacket, and is arranged outside the riser, so that the horizontal layer of the jacket can be replaced to provide support for the riser, unnecessary horizontal layers of the jacket are reduced, the overall structure of the jacket is optimized, and the material cost and the investment cost are saved.
Drawings
FIG. 1 is a left side elevational view of the floating launch truss of the invention;
FIG. 2 is a right side elevational view of the floating launch truss of the invention;
FIG. 3 is a top plan view of the floating launch truss of the invention;
FIG. 4 is a cross-sectional view of the floating launch truss of the invention;
the respective symbols in the figure are as follows:
1-launching a launching leg of a launching truss; 2-launching the water leg of the launching truss; 3-a lower water truss support rod, 301-a lower water truss horizontal support rod, 302-a lower water truss vertical support rod; 4-internal support rods of the launching truss, 401-internal inclined support rods of the launching truss, 402-internal vertical support rods of the launching truss and 403-internal horizontal support rods of the launching truss; 5-a connecting rod; 6-riser pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
The embodiment provides a floating launching truss, which comprises the following components:
the water-saving device comprises a lower water leg 1 of a lower water truss and an upper water leg 2 of the lower water truss, wherein the lower water leg 1 of the lower water truss is positioned below the upper water leg 2 of the lower water truss, and 2 lower water legs 1 of the lower water truss and 2 upper water legs 2 of the lower water truss are horizontally arranged below a jacket and distributed in a quadrilateral shape;
the supporting rod 3 of the launching truss comprises a horizontal supporting rod 301 of the launching truss and a vertical supporting rod 302 of the launching truss, and a quadrilateral truss structure is formed by sequentially and alternately connecting a plurality of horizontal supporting rods 301 of the launching truss between two adjacent launching legs 1 of the launching truss and a plurality of vertical supporting rods 302 of the launching truss between the launching legs 1 of the launching truss and the launching legs 2 of the launching truss through the horizontal supporting rods 301 of the launching truss and the vertical supporting rods 302 of the launching truss;
the internal support rod 4 of the launching truss is arranged inside the truss structure;
and the connecting rod 5 is arranged on each horizontal supporting rod 301 of the lower water truss, is positioned above a horizontal plane formed by the upper water legs 2 of the lower water truss and is used for being connected with the supporting rod of the jacket body.
In this embodiment, the internal supporting rod 4 of the launching truss comprises a plurality of internal inclined supporting rods 401 of the launching truss, one end of each internal inclined supporting rod 401 of the launching truss is connected with the upper water leg 2 of the launching truss, the other end of each internal inclined supporting rod 401 of the launching truss is connected with the lower water leg 1 of the launching truss, and an X-shaped structure is formed between every two adjacent supporting rods 3 of the launching truss.
Example 2
The embodiment provides a floating launching truss, which comprises the following components:
the water-saving device comprises a lower water leg 1 of a lower water truss and an upper water leg 2 of the lower water truss, wherein the lower water leg 1 of the lower water truss is positioned below the upper water leg 2 of the lower water truss, and 2 lower water legs 1 of the lower water truss and 2 upper water legs 2 of the lower water truss are horizontally arranged below a jacket and distributed in a quadrilateral shape;
the supporting rod 3 of the launching truss comprises a horizontal supporting rod 301 of the launching truss and a vertical supporting rod 302 of the launching truss, and a quadrilateral truss structure is formed by sequentially and alternately connecting a plurality of horizontal supporting rods 301 of the launching truss between two adjacent launching legs 1 of the launching truss and a plurality of vertical supporting rods 302 of the launching truss between the launching legs 1 of the launching truss and the launching legs 2 of the launching truss through the horizontal supporting rods 301 of the launching truss and the vertical supporting rods 302 of the launching truss;
the internal support rod 4 of the launching truss is arranged inside the truss structure;
and the connecting rod 5 is arranged on each horizontal supporting rod 301 of the lower water truss, is positioned above a horizontal plane formed by the upper water legs 2 of the lower water truss and is used for being connected with the supporting rod of the jacket body.
In this embodiment, the internal support rods 4 of the launching truss include a plurality of internal inclined support rods 401 of the launching truss and a plurality of internal vertical support rods 402 of the launching truss, and two internal inclined support rods 401 of the launching truss are symmetrically distributed on two sides of one corresponding internal vertical support rod 402 of the launching truss to form an umbrella-shaped structure and are located between two adjacent support rods 3 of the launching truss. Two ends of the internal inclined supporting rod 401 of the launching truss and two ends of the internal vertical supporting rod 402 of the launching truss are respectively connected with the upper water leg 2 of the launching truss and the lower water leg 1 of the launching truss.
Example 3
The embodiment provides a floating launching truss, which comprises the following components:
the water-saving device comprises a lower water leg 1 of a lower water truss and an upper water leg 2 of the lower water truss, wherein the lower water leg 1 of the lower water truss is positioned below the upper water leg 2 of the lower water truss, and 2 lower water legs 1 of the lower water truss and 2 upper water legs 2 of the lower water truss are horizontally arranged below a jacket and distributed in a quadrilateral shape;
the supporting rod 3 of the launching truss comprises a horizontal supporting rod 301 of the launching truss and a vertical supporting rod 302 of the launching truss, and a quadrilateral truss structure is formed by sequentially and alternately connecting a plurality of horizontal supporting rods 301 of the launching truss between two adjacent launching legs 1 of the launching truss and a plurality of vertical supporting rods 302 of the launching truss between the launching legs 1 of the launching truss and the launching legs 2 of the launching truss through the horizontal supporting rods 301 of the launching truss and the vertical supporting rods 302 of the launching truss;
the internal support rod 4 of the launching truss is arranged inside the truss structure;
and the connecting rod 5 is arranged on each horizontal supporting rod 301 of the lower water truss, is positioned above a horizontal plane formed by the upper water legs 2 of the lower water truss and is used for being connected with the supporting rod of the jacket body.
In this embodiment, the internal support rod 4 of the launching truss includes a plurality of internal inclined support rods 401 of the launching truss, a plurality of internal vertical support rods 402 of the launching truss and a plurality of internal horizontal support rods 403 of the launching truss, two internal inclined support rods 401 of the launching truss, one internal vertical support rod 402 of the launching truss and one internal horizontal support rod 403 of the launching truss form a structure shaped like a Chinese character 'mi', and the structure shaped like a Chinese character 'mi' is located between two adjacent supporting rods 3 of the launching truss. And the two ends of the internal inclined support bar 401 of the launching truss, the internal vertical support bar 402 of the launching truss and the internal horizontal support bar 403 of the launching truss are respectively connected with the upper water leg 2 of the launching truss and the lower water leg 1 of the launching truss.
Example 4
This embodiment provides a practical application of the floating launching truss of any one of embodiments 1-3 to an oil field in the south China sea, where the water depth is about 286 m.
In this embodiment, the launching leg 1 of the launching truss is 2 circular pipes with a diameter of 2.5m, the two circular pipes start from 55m below the water surface to 283m below the water surface, and the total length is about 230 m. The distance between the center lines of the two round pipes is 24 m. The launching leg 2 of the launching truss is also 2 round pipes with the diameter of 2.5m, and the initial position, the end position and the central line distance of the two round pipes are consistent with the launching leg 1 of the launching truss.
In this embodiment, the horizontal layers (9 horizontal layers are provided on the lower water truss) formed by the lower water truss horizontal support rod 301 and the lower water truss upper water leg 2 are respectively located 55m below the water surface, 84m below the water surface, 106.5m below the water surface, 130m below the water surface, 155m below the water surface, 188m below the water surface, 220m below the water surface, 259m below the water surface and 283m below the water surface, and the vertical maximum interval of the horizontal layers is 39m and is respectively formed by circular pipes with diameters of 1.372m, 1.524m, 1.676m and 1.829 m.
Before the launching truss of the invention is not applied, the ratio of the actual stress to the allowable stress of the main structure of the jacket is about 0.8 to 0.9 through calculation. By applying the invention, under the same conditions, the ratio of the actual stress to the allowable stress of the main structure of the jacket is reduced to be between 0.7 and 0.8. In addition, the device has a floating characteristic, the structure of the jacket can be optimized by optimizing the stress of the jacket, the weight of the structure is reduced from 32600 tons to 30000 tons by about 10 percent before and after the device is applied under the condition that the stress ratio is basically the same as the reference condition, and the economy of the jacket is improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A floating launch truss comprising the following components:
the water drainage truss structure comprises a drainage truss lower water leg (1) and a drainage truss upper water leg (2), wherein the drainage truss lower water leg (1) is positioned below the drainage truss upper water leg (2), and a plurality of drainage truss lower water legs (1) and a plurality of drainage truss upper water legs (2) are horizontally arranged below a jacket body and distributed in a polygonal shape;
the structure comprises lower water truss support rods (3), wherein each lower water truss support rod (3) comprises a lower water truss horizontal support rod (301) and a lower water truss vertical support rod (302), and a plurality of lower water truss horizontal support rods (301) are arranged between every two adjacent lower water truss lower water legs (1) and between every two adjacent lower water truss upper water legs (2), and a plurality of lower water truss vertical support rods (302) are sequentially and alternately connected between the lower water truss lower water legs (1) and the lower water truss upper water legs (2) to form a polygonal truss structure;
the internal support rod (4) of the launching truss is arranged inside the truss structure;
the connecting rods (5) are arranged on the horizontal supporting rods (301) of the launching trusses, are positioned above a horizontal plane formed by the water feeding legs (2) of the launching trusses and are used for being connected with the supporting rods of the jacket body;
the water-proof structure further comprises a water-proof guide pipe (6) arranged inside the truss structure.
2. The floating launching truss of claim 1 wherein the launching truss internal support bars (4) comprise a plurality of launching truss internal diagonal support bars (401), one end of the launching truss internal diagonal support bars (401) is connected to the launching truss upper leg (2) and the other end is connected to the launching truss lower leg (1), and an X-shaped structure is formed between two adjacent launching truss support bars (3).
3. A floating launching truss as claimed in claim 2 wherein two of said launching truss internal diagonal support rods (401) are symmetrically distributed on either side of a respective one of said launching truss support rods (3) to form an umbrella structure.
4. The floating launching truss of claim 1 wherein said launching truss inner support bars (4) comprise a plurality of launching truss inner diagonal support bars (401) and a plurality of launching truss inner vertical support bars (402), two of said launching truss inner diagonal support bars (401) being symmetrically distributed on either side of a respective one of said launching truss inner vertical support bars (402) to form an umbrella structure, said umbrella structure being located between adjacent two of said launching truss support bars (3).
5. The floating launching truss of claim 1 wherein the launching truss internal support bars (4) include a plurality of launching truss internal diagonal support bars (401), a plurality of launching truss internal vertical support bars (402), and a plurality of launching truss internal horizontal support bars (403), two of the launching truss internal diagonal support bars (401), one of the launching truss internal vertical support bars (402), and one of the launching truss internal horizontal support bars (403) forming a m-shaped structure, the m-shaped structure being located between two adjacent launching truss support bars (3).
6. A floating launching truss according to any one of claims 2-5 wherein the riser pipe (6) is placed on either or both of the launching truss internal diagonal support bar (401), the launching truss internal vertical support bar (402) or the launching truss internal horizontal support bar (403).
7. A jacket comprising a jacket body, characterized in that it further comprises a floating launch truss according to any of claims 1-6, said jacket body being supported on said connecting rods (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010227797.4A CN111391986B (en) | 2020-03-27 | 2020-03-27 | Floating type launching truss and jacket comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010227797.4A CN111391986B (en) | 2020-03-27 | 2020-03-27 | Floating type launching truss and jacket comprising same |
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| CN111391986A CN111391986A (en) | 2020-07-10 |
| CN111391986B true CN111391986B (en) | 2022-02-01 |
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Families Citing this family (1)
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| CN113236141B (en) * | 2021-06-08 | 2023-01-17 | 中国海洋石油集团有限公司 | Surface layer conduit bearing capacity reinforcing device and operation method thereof |
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