CN114657961A - Integral installation method for upper module of fixed offshore oil platform - Google Patents
Integral installation method for upper module of fixed offshore oil platform Download PDFInfo
- Publication number
- CN114657961A CN114657961A CN202210168657.3A CN202210168657A CN114657961A CN 114657961 A CN114657961 A CN 114657961A CN 202210168657 A CN202210168657 A CN 202210168657A CN 114657961 A CN114657961 A CN 114657961A
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- Prior art keywords
- jacket
- barge
- offshore oil
- upper block
- oil platform
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- 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
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- 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
- E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
- E02B17/06—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for immobilising, e.g. using wedges or clamping rings
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- 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
- E02B2017/0039—Methods for placing the offshore structure
-
- 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
- E02B2017/0039—Methods for placing the offshore structure
- E02B2017/0047—Methods for placing the offshore structure using a barge
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- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
Abstract
The invention discloses an integral installation method of an upper module of a fixed offshore oil platform, which comprises the upper module and a jacket, wherein the jacket is used for supporting the upper module, the leg part of the jacket is fixed on the seabed, the upper module comprises a multilayer deck, the upper module comprises a connecting part, a traction lifting device is arranged on the connecting part, and a traction lifting device is arranged at the top of a pile leg of the jacket; the installation limit of ship resources on large-scale blocks of the offshore oil platform is effectively overcome; the collision load in the marine installation process is reduced, the window for selecting barges is enlarged, and the construction period selection of marine installation is facilitated; the cutting amount of the jacket is reduced; the safety and the reliability of offshore installation are improved; compared with the passive traction lifting installation method of the offshore oil platform block, the installation method saves the installation time and reduces the installation cost of the offshore oil platform block.
Description
Technical Field
The invention relates to an offshore installation method for an upper module of an offshore oil platform, in particular to an integral installation method for an upper module of a fixed offshore oil platform.
Background
In the process of offshore oil development, an offshore oil platform is one of the most common facilities. In the offshore installation process of an upper chunk of an offshore oil platform, a floating-support installation method is often adopted, namely, the load of the upper chunk is transferred to a lower foundation by adjusting the height of the upper chunk arranged on a transport ship relative to the lower foundation, and in the traditional floating-support installation, because the traditional floating-support installation is influenced by factors such as the weight of the chunk, the width of a notch of a jacket, the depth of water of an oil field and the like, the transportation barge is easy to lose stability in the transportation and installation process, and meanwhile, the offshore installation is also more dangerous; in addition, the main dimension of the barge used in the traditional floatover installation is large, and the transportation barge is often required to be searched in the whole world, so that the overall installation period is uncertain, and the installation cost is high.
Disclosure of Invention
The present invention is intended to solve the above technical problems to some extent.
In view of this, the invention provides an integral installation method of an upper block of a fixed offshore oil platform, which reduces the height of the center of gravity of the block during towing, so that a smaller barge can meet the transportation requirement of a large block, the height of the upper block on the barge is reduced, and better stability is obtained.
In order to solve the technical problem, the invention provides a method for integrally installing an upper module of a fixed offshore oil platform, which is characterized by comprising the following steps of:
s1: pulling the upper module of the fixed offshore oil platform to a floating barge, and installing and fixing the module;
s2: said barge hauling said upper block to a predetermined sea area;
s3: adjusting the buoyancy of the float-over barge, and drawing the float-over barge into the slot of the conduit frame;
s4: towing the barge to a predetermined position so that the connecting part of the upper block is within a corresponding capturing range of the butting buffer part at the top of the pile leg of the jacket;
s5: adjusting the ballast of the float-over barge to complete the butt joint of the connecting part of the upper block and the butt joint buffer part at the top of the pile leg of the jacket;
s6: removing the temporary fixed connection of the upper block and the floating barge;
s7: adjusting the barge ballast by tide, controlling the draft thereof, and gradually transferring the weight of the upper block from the barge to the jacket;
s8: adjusting the ballast of the barge to leave a certain safety gap between the block support structure on the barge and the upper block;
s9: the barge is withdrawn from the position of the jacket notch;
s10: connecting and fixing the connecting part of the upper module with the jacket pile leg;
s11: the traction lifting device is used for locking after the upper module block is traction-lifted to a position above the designed height;
s12: a stop block is arranged on the outer side of the lining upright post of the upper block and used for bearing the stress and deformation of the leg post;
s13: lowering the upper block to the welding stop block through the traction lifting device and then releasing the traction lifting device;
s14: and welding and fixing the upright post sleeved outside the upper module and the stop block, so as to finish the installation of the whole upper module.
Further, in step S1, the upper block and the floatover barge are temporarily welded and fixed.
Further, in the steps S2 to S4, the barge is towed by four power-towed boats arranged in front and rear.
Furthermore, the four power traction boats are dragged at an angle of 120 degrees.
Further, in the step S8, the safety gap is between 1.5m and 4.5 m.
Further, in the step S11, the upper block is pulled and lifted to a position 100mm to 150mm above the design height.
Further, in step S12, the number of stoppers is 6 or 8.
A fixed offshore oil platform is characterized by comprising a jacket and an upper block, wherein jacket legs are fixed on the seabed, the upper part of the jacket is provided with four jacket legs, the upper block comprises a multi-layer deck, four upright posts penetrate through the deck of an upper block platform, the four upright posts correspond to the four jacket legs in position and are in butt joint with the four jacket legs, the upper block comprises a connecting part, a traction lifting device is arranged on the connecting part, the top of each jacket leg is provided with a traction lifting device,
further, the jacket leg has a butt damper comprising a butt ring angle steel that is flared and has an eversion angle of 120 ° and a rubber cushion column that underlies and connects the ring butt ring angle steel.
Further, the traction lifting device comprises 4, 6, 8 or 12 sets of multi-unit hydraulic lifters for traction lifting of the upper block.
The invention has the technical effects that: by the integral installation method of the upper chunk of the fixed offshore oil platform, the height of the center of gravity of the chunk during towing is reduced, so that a smaller barge can meet the transportation requirement of a large chunk, the height of the upper chunk on the barge is reduced, and better stability is obtained; the installation limit of ship resources on large-scale blocks of the offshore oil platform is effectively overcome; the collision load in the marine installation process is reduced, the installation requirement on the environment is reduced, the window for selecting the barge is enlarged, and the construction period selection of marine installation is facilitated; the space requirement on the pile leg of the jacket is effectively reduced, and the cutting amount of the jacket is reduced; the installation method is suitable for the installation of the offshore oil platform with limited structural space; the chunk is lifted under the static environment condition, so that the safety and reliability of offshore installation can be obviously improved; moreover, compared with the offshore oil platform block passive traction lifting installation method, the installation method saves installation time, the upper block is lowered and welded at one time, offshore installation time and installation period are effectively saved, installation efficiency is improved, and offshore oil platform block installation cost is effectively reduced.
Drawings
FIG. 1 is a schematic view of the towing of an upper block of the present invention;
FIG. 2 is a schematic view of the main structure of the upper block of the present invention;
FIG. 3 is a schematic view of a traction hoist of the present invention;
FIG. 4 is a schematic top view of the present invention;
FIG. 5 is a schematic elevation view of the present invention;
FIG. 6 is a schematic illustration of the present invention in position for entry of a ship;
FIG. 7 is a schematic view of a jacket docking buffer of the present invention;
FIG. 8 is a schematic view of an outboard stop for a liner stud according to the present invention;
FIG. 9 is a schematic view of the upper block of the present invention completing the docking;
FIG. 10 is a schematic view of the final position of the upper block of the present invention.
Wherein, 1 — upper block; 2-barge; 11-first connection of upper block; 12-a second connection of the upper block; 13-third connection of upper block; 14-fourth connection of upper block; 111-insert tips at the tops of the lining columns; 112-lining column; 113-jacket columns; 114-a traction hoist; 1141-a hydraulic lifter; 141-inserting tips at the tops of the lining columns; 142-a liner column; 143-jacket columns; 144-pulling the lifting device; 1441 — hydraulic lifter; 121-inserting tips at the tops of lining upright posts; 122-jacket columns; 123-jacket columns; 131-inserting tips at the tops of the lining upright columns; 132-jacket columns; 133-jacket columns; 4-a jacket; 51-power traction vessel; 52-power traction vessel; 53-power traction vessel; 54-power traction vessel; 41-the top of the pile leg of the jacket is butted with the buffer part; 42-a jacket leg top butt buffer part; 6-a stop block; 61-the upper part of the block; 62-stop bottom.
Detailed Description
The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.
An integral installation method for an upper block of a fixed offshore oil platform is shown in the figures 1 to 9 and comprises the following steps:
s1: and (3) dragging the upper block 1 of the fixed offshore oil platform onto a float-over barge 2, and fixing the upper block and the float-over barge through a temporary welding structure.
S2: the floatover barge 2 ships the upper block 1 to a predetermined sea area.
S3: the float state of the barge 2 is adjusted and the barge 2 is pulled into the notch of the previously installed jacket 4.
S4: the barge 2 is pulled to a predetermined position so that the connection portions 11, 12, 13, 14 of the upper block 1 are within the corresponding capture range of the leg top butt buffers 41 of the jacket 4.
The barge 2 is towed by four power tugs 51, 52, 53, 54 in front and rear in the second to fourth steps. Four power tractors 51, 52, 53, 54 drag and drag within 90-120 degree.
S5: the ballast of the barge 2 is adjusted to complete the butt joint of the connection parts 11, 12, 13, 14 of the upper block 1 and the butt buffer parts 41, 42 at the tops of the jacket legs 4.
During the use, the sharp 111 is inserted to the inside lining stand shank of upper portion chunk 1, progressively transfers, butt joint annular angle steel at jacket spud leg top, and when descending, the rubber buffer post progressively receives the force and contracts until the top is tight.
S6: the temporary fixed connection of the upper block 1 to the pontoon barge 2 in the first step is removed.
S7: the ballast of the barge 2 is adjusted by the sea tide to control the draft, so that the weight of the upper block 1 is gradually transferred from the barge 2 to the jacket 4.
S8: the ballast of the barge 2 is adjusted so that a certain safety gap is left between the support structure of the upper block 1 on the barge 2 and the upper block 1, and the safety gap is between 1.5m and 4.5 m.
S9: the barge 2 is withdrawn from the notch position of the jacket 4, and by this point, the barge 2 is completely detached from the upper block 1.
S10: and (3) welding and connecting the outer sides of all lining upright top spigots 111, 121, 131 and 141 of the upper block 1 with the tops of the pile legs of the jacket 4.
S11: using the traction lifting devices 114 and 144 to traction and lift the upper block 1 to a position above the designed height, and locking the traction lifting devices 114 and 144; the upper block 1 is pulled and lifted to a height in the range of 100mm-150mm above the design height.
S12: welding stoppers on the outer sides of the upper block lining columns 112, 122, 132 and 142, wherein the stoppers are used for bearing the integral stress and deformation of the upper blocks; the number of blocks is matched according to the number of jackets, and is 6 blocks or 8 blocks, and 8 blocks in the embodiment.
S13: and releasing the traction lifting device after the upper module 1 is lowered to the welding stop block through the traction lifting device.
S14: and welding and fixing the upright column sleeved outside the upper block 1 and the top of the stop block, so that the whole upper block is installed.
A fixed offshore oil platform for implementing an integral installation method comprises an upper block 1 and a jacket 4, the jacket is used for supporting the upper block, jacket legs are fixed on the seabed, and the upper block comprises a plurality of decks, including a lower deck, a middle deck and a top deck in the embodiment.
The jacket 4 may be provided with eight legs or six legs. In this embodiment eight legs.
The upper portion module 1 comprises connecting portions, the connecting portions are four stand columns, the four stand columns penetrate through the upper portion module three-layer deck platform, the positions of the four stand columns correspond to the positions of four outer legs of a jacket, the four stand columns comprise lining stand columns and outer jacket stand columns, octagonal double-layer ring plates are arranged on the outer sides of insert points at the tops of the lining stand columns, the tops of the lining stand columns are arc-shaped, and the gap range of the lining stand columns and the outer jacket stand columns is 35-50 mm.
The stopper 6 is arranged on the outer side of the lining upright post, the stopper 6 is annular, the depth range of the stopper is 55-85 mm, the bottom 62 of the stopper is in the shape of a pointed tooth, and the number of the pointed teeth is 6-12.
The top end of the connecting part is provided with traction lifting devices 11 and 14, the traction lifting devices comprise 4 groups or 6 groups or 8 groups or 12 groups of multi-unit hydraulic lifters, 6 groups in the embodiment, and the hydraulic lifters are used for traction lifting of the upper block.
The top of the jacket legs are provided with butt-joint buffer devices 41. The butt joint buffer device 41 includes a butt joint annular angle steel 411 and a rubber buffer column 412, the rubber buffer column is located below the ring butt joint annular angle steel, the annular angle steel is in a bell-mouth shape, and the outward turning angle is 120 °.
During use, eight groups of lining upright columns 112, 122, 132 and 142 of the upper block 1 are synchronously lowered, the insertion tips 111, 121, 131 and 141 at the tops of the lining upright columns and the tops of jacket spud legs are provided with butt joint devices 41 which are welded, the upper block 1 is pulled and lifted through 4 groups of traction lifting devices 11 and 14 positioned at the top ends of connecting parts of the outer four legs, at the moment, the outer four legs of the connecting parts of the eight upper blocks are pulled and lifted to a preset height, the stop blocks are welded at proper positions of the eight inner four legs, after welding is completed, the upper block 1 is lowered to the welding stop blocks through the traction lifting devices 11 and 14, the traction lifting devices 11 and 14 are released, at the moment, all weight is transferred to the stop blocks, the stop blocks and the bottom edge of the jacket upright columns are welded and fixed, and the whole upper block is installed.
Compared with the offshore oil platform block passive traction lifting installation method, the installation time is saved, the upper block is lowered and welded at one time, the offshore installation time and the installation period are effectively saved, the installation efficiency is improved, and the offshore oil platform block installation cost is effectively reduced.
The integral installation method of the fixed offshore oil platform upper chunk reduces the height of the center of gravity of the chunk during towing, so that a smaller barge can meet the transportation requirement of a large chunk, the height of the upper chunk on the barge is reduced, and better stability is obtained; the installation limit of ship resources on large-scale blocks of the offshore oil platform is effectively overcome; the collision load in the marine installation process is reduced, the installation requirement on the environment is reduced, the window for selecting the barge is enlarged, and the construction period selection of marine installation is facilitated; the space requirement on the pile leg of the jacket is effectively reduced, and the cutting amount of the jacket is reduced; the installation method is suitable for the installation of the offshore oil platform with limited structural space; the chunk is lifted under the static environment condition, so that the safety and reliability of offshore installation can be obviously improved; moreover, compared with a passive traction lifting installation method of the offshore oil platform block, the installation method has the advantages that the installation time is saved, the upper block is welded in a downward mode at one time, the offshore installation time and the installation period are effectively saved, the installation efficiency is improved, and the installation cost of the offshore oil platform block is effectively reduced.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The integral installation method of the upper module of the fixed offshore oil platform is characterized by comprising the following steps:
s1: pulling the upper module of the fixed offshore oil platform to a floating barge, and installing and fixing the module;
s2: said barge hauling said upper block to a predetermined sea area;
s3: adjusting the buoyancy of the float-over barge, and drawing the float-over barge into the slotted opening of the duct frame;
s4: towing the barge to a predetermined position so that the connection part of the upper block is within the corresponding capture range of the butt buffer part at the top of the jacket leg;
s5: adjusting the ballast of the float-over barge to complete the butt joint of the connecting part of the upper block and the butt joint buffer part at the top of the pile leg of the jacket;
s6: removing the upper block and temporarily fixedly connecting the upper block with the float-over barge;
s7: adjusting the barge ballast by tide, controlling the draft thereof, and gradually transferring the weight of the upper block from the barge to the jacket;
s8: adjusting the ballast of the barge to leave a certain safety gap between the block support structure on the barge and the upper block;
s9: the barge is withdrawn from the position of the jacket notch;
s10: connecting and fixing the connecting part of the upper module with the jacket pile leg;
s11: the traction lifting device is used for locking after the upper module block is traction-lifted to a position above the designed height;
s12: a stop block is arranged on the outer side of the lining upright post of the upper block and used for bearing the stress and deformation of the leg post;
s13: releasing the traction lifting device after the upper module is lowered to the welding stop block through the traction lifting device;
s14: and welding and fixing the upright post sleeved outside the upper module and the stop block, so as to finish the installation of the whole upper module.
2. The method for integrally installing the upper block of the fixed offshore oil platform according to claim 1, wherein the upper block is temporarily welded and fixed to the barge in step S1.
3. The method of integrally installing an upper block of a fixed offshore oil platform according to claim 1, wherein the barge is towed by four power tugs distributed fore and aft in the steps S2 to S4.
4. The method for integrally installing the upper block of the fixed offshore oil platform according to claim 3, wherein the four power-driven tugs are towed at 120 degrees.
5. The method for integrally installing the upper block of the fixed offshore oil platform according to claim 1, wherein the safety clearance is between 1.5m and 4.5m in the step S8.
6. The method for integrally installing the upper block of the fixed offshore oil platform according to claim 1, wherein the step S11 is performed by pulling and lifting the upper block to a height 100-150 mm above a design height.
7. The method for integrally installing the upper block of the fixed offshore oil platform according to claim 1, wherein the number of the stoppers in the step S12 is 6 or 8.
8. A fixed offshore oil platform is characterized by comprising a jacket and an upper module, wherein jacket legs are fixed on the seabed, four jacket legs are arranged on the upper portion of the jacket, the upper module comprises a multi-layer deck, four stand columns penetrate through the deck of the upper module platform, the four stand columns correspond to the four jacket legs in position and are in butt joint with the four jacket legs, the upper module comprises a connecting portion, a traction lifting device is installed on the connecting portion, and the traction lifting device is arranged at the tops of the jacket legs.
9. The fixed offshore oil platform of claim 8, wherein the jacket legs have butt buffers comprising butt ring angles that are flared and have an out-turned angle of 120 ° and rubber buffer columns that are located below and connect the ring butt ring angles.
10. The stationary offshore oil platform of claim 8, wherein the traction hoist comprises 4, 6, 8 or 12 sets of multi-unit hydraulic lifters for traction hoisting of the upper block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210168657.3A CN114657961A (en) | 2022-02-23 | 2022-02-23 | Integral installation method for upper module of fixed offshore oil platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210168657.3A CN114657961A (en) | 2022-02-23 | 2022-02-23 | Integral installation method for upper module of fixed offshore oil platform |
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|---|---|
| CN114657961A true CN114657961A (en) | 2022-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210168657.3A Pending CN114657961A (en) | 2022-02-23 | 2022-02-23 | Integral installation method for upper module of fixed offshore oil platform |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556972A (en) * | 2013-10-23 | 2014-02-05 | 中国海洋石油总公司 | Self-installed ocean floor drilling template and installation method thereof |
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2022
- 2022-02-23 CN CN202210168657.3A patent/CN114657961A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103556972A (en) * | 2013-10-23 | 2014-02-05 | 中国海洋石油总公司 | Self-installed ocean floor drilling template and installation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 原庆东: "陆丰7-2油田导管架平台上部组块低位浮托安装关键技术", 中国海上油气 * |
| 张广磊等: "被动式浮托结合牵引提升安装南中国海大型平台组块", 中国海洋平台 * |
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