CN106585910B - A kind of standpipe produces support floating drum and its installation and recovery method from tension type under water - Google Patents
A kind of standpipe produces support floating drum and its installation and recovery method from tension type under water Download PDFInfo
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- CN106585910B CN106585910B CN201611102114.2A CN201611102114A CN106585910B CN 106585910 B CN106585910 B CN 106585910B CN 201611102114 A CN201611102114 A CN 201611102114A CN 106585910 B CN106585910 B CN 106585910B
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- 238000007667 floating Methods 0.000 title claims abstract description 414
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 238000009434 installation Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000011084 recovery Methods 0.000 title claims abstract description 11
- 230000033001 locomotion Effects 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 24
- 230000005484 gravity Effects 0.000 claims description 17
- 238000013461 design Methods 0.000 claims description 16
- 238000004064 recycling Methods 0.000 claims description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 6
- 230000002459 sustained effect Effects 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 238000011161 development Methods 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 239000003653 coastal water Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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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
- B63B35/4413—Floating drilling platforms, e.g. carrying water-oil separating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B75/00—Building or assembling floating offshore structures, e.g. semi-submersible platforms, SPAR platforms or wind turbine platforms
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- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Civil Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
Producing support floating drum and its installation and recovery method, the floating drum under water from tension type the invention discloses a kind of standpipe includes outer layer floating drum and internal layer floating drum, and the outer layer floating drum is nested with multiple internal layer floating drums.The outer layer floating drum of the present invention is responsible for providing mooring cable tensile force, internal layer floating drum then provides rigid riser top tensile force, therefore the present invention can easily provide top tensile force needed for rigid riser and mooring cable at the same time, and the requirement of practical implementation could be met by producing support floating drum under water from tension type using this standpipe in ultra-deep-water marine oil and gas Engineering Develop System for MSC.The present invention decouples the catenary motion and stress of rigid riser and outer layer floating drum, can reduce the stress and motion amplitude of rigid riser, is conducive to improve the intensity and fatigue behaviour of rigid riser.When floating drum shifts, it will not occur to push up the secondary distribution of tensile force between each rigid riser, the intensity and fatigue behaviour for being conducive to improve rigid riser make it meet use demand.
Description
Technical field
The present invention relates to a kind of ultra-deep-water marine oil and gas Engineering Develop System for MSC, more particularly to a kind of underwater production support floating drum
And its installation and recovery method.
Background technology
With petering out for landing field, coastal waters and mesopelagic (200 meter Dao1000 meter Shui Shen) domain petroleum resources, the exploitation of offshore oil gradually to deep-sea with
Ultra-deep sea strides forward.And existing floating production platform, subsea production system are difficult to be answered in deep water and ultra-deep water environment
With.
Chinese patent (102434129 A of CN) discloses a kind of ultra-deep-water marine oil and gas Engineering Develop System for MSC, is used for
3000m is with the super abyssal environment oil and gas development of headwater depth.The system includes water surface floating type process units, standpipe support floating drum, water
Middle oil production equipment, top flexibility jumper pipe, lower part rigid riser and subsea wellhead installations；The oil production equipment is installed on vertical
On pipe support floating drum.The petroleum resources in seabed supports floating drum by subsea wellhead installations, lower part rigid riser, water neutral tube, adopts
Oily equipment and top flexibility jumper pipe reach water surface floating type process units, so as to carry out exploitation and the engineering fortune of offshore oil and gas field
Battalion.The system realizes the expansion application of shallow sea well-completing process and oil production equipment in ultra-deep-water, reduces the performance of oil production equipment
It is required that and installation and well workover technological requirement, can safely, economically and efficiently tackle 3000m with the ultra-deep water ring of headwater depth
Every challenge in border.
The standpipe support floating drum of the system is connected three rectangular section cantilevers and is floated using central rod structure, central rods edge
Cylinder, their angles in the plane are 120 °, are formed radial, and rectangular section cantilever floating drum end uses the truss of neutral buoyancy
Structure, floating drum are fixed on sea bed by three mooring cables.Floating drum mainly provides rigid riser top tensile force, mooring cable
Power, supports oil production equipment dead weight and partially flexible jumper pipe weight in water.
It is following several that standpipe in such a ultra-deep-water offshore and gas development system supports floating drum to exist in practical engineering application
A problem：
1st, mooring cable and the top tensile force needed for rigid riser differ greatly, such as：When the system is applied in 3000m water
When in depth, if it is 2.22 to take mooring cable factor of safety, the tensile force needed for single cable is 9689kN；Take rigid riser top
Clamp force coefficient is 1.7, and the tensile force needed for single standpipe is 5757kN.And mooring cable is supported with rigid riser using standpipe
Floating drum is passively tensioned, it is difficult to easily adjusts the top tensile force of the two.Therefore, above-mentioned standpipe support floating drum is difficult to provide at the same time
Top tensile force needed for mooring cable and rigid riser.
2nd, the buried depth of standpipe support floating drum is necessary sufficiently large (below the 200m depth of waters), if if buried depth deficiency, standpipe support
Floating drum is easily influenced by Shallow Wave and lateral shift occurs, this will cause the secondary of mooring cable and rigid riser top tensile force
Distribution, causes the main body stress variation of rigid riser, is unfavorable for the intensity and anti-fatigue performance of rigid riser.
3rd, standpipe supports floating drum with three mooring cable moorings on sea bed, when wherein any one hawser is broken mistake for some reason
During effect, standpipe supports floating drum to be changed into 2 points of supports from supported at three point, causes its loss of stability, mooring cable and rigid riser
Top tensile force is redistributed, and rigid riser top tensile force increased dramatically, and excessive top tensile force can break rigid riser and cause
System crash.
Due to the above problem, the standpipe support floating drum in said system is difficult to apply in practice in engineering.
The content of the invention
To solve the above problem existing in the prior art, it can be ultra-deep-water marine oil and gas engineering that the present invention, which will design one kind,
The standpipe that development system provides top tensile force needed for rigid riser and mooring cable respectively produces support floating drum from tension type under water
And its installation and recovery method, the floating drum can decouple rigid riser and the vertical stress of mooring cable, and in a mooring line
The stability of ultra-deep-water marine oil and gas Engineering Develop System for MSC is kept in the case of rope failure.
To achieve these goals, technical scheme is as follows：
A kind of standpipe produces support floating drum from tension type under water, including outer layer floating drum and internal layer floating drum, the outer layer float
Cylinder is nested with multiple internal layer floating drums；
The outer layer float body is cylindrical structure, and outer layer floating drum outer wall lower edge connects four cantilever floating drums,
Four cantilever floating drums are evenly distributed, and radially, cantilever floating drum end uses truss structure, the outer end connection system of truss structure
Hawser is moored, outer layer floating drum is by four mooring cable moorings in the pile foundation of sea bed；Multiple cylinders are vertically arranged in outer layer floating drum
Passage, for installing multiple internal layer floating drums；Cylindrical channel inner wall is uniformly distributed along the circumference four vertical slideways, and slideway is through whole circle
Cylindrical passageway inner wall；Inner wall center between adjacent two slideway, highly locates to set limit body A from outer layer floating drum bottom 1/3；
The internal layer float body is cylindrical structure, its outside diameter is less than the diameter of cylindrical channel, outside internal layer floating drum
Wall is uniformly distributed along the circumference four vertical bossy bodies, and bossy body width B1 is less than the width B of the slideway in cylindrical channel, bossy body with
Internal layer floating drum is contour；The bossy body is located in the slideway in cylindrical channel；In outer wall between adjacent two bossy body
Centre, from being provided with limit body B at 1/2 height of internal layer floating drum bottom, limit body B and the limit body A phases being located in cylindrical channel
Coordinate, the relative vertical motion of limitation internal layer floating drum and outer layer floating drum；
The internal layer floating drum top is provided with a well head head, and there is standpipe passage in the lower end of well head head, rigid riser
Upper end is connected to the well head head on internal layer floating drum top by standpipe passage；Well is provided with oil production equipment in word, and internal layer floating drum is used
In the corresponding single rigid standpipe top tensile force of offer and support oil production equipment.
Further, the bossy body front is provided with two drum apparatus, respectively positioned at bossy body front long side
Two trisections are highly located, and the drum apparatus is made of roller, shaft and bearing, and shaft axis are perpendicular to protrusion side
Face, standoff length is equal with the positive width B1 of bossy body, and roller is installed on bearing by shaft；Roller is rolled with slideway bottom surface
Dynamic contact.
Further, the cantilever floating drum is rectangular section cantilever floating drum.
Further, the cross section of the slideway is rectangular section；The cross section of the bossy body is rectangular section.
Further, the limit body A is cuboid, has 4 in each cylindrical channel, along cylindrical channel
Wall is circumferentially uniformly distributed, and is at cylindrical channel inner wall sustained height；The limit body B is cuboid, each internal layer floating drum
On have 4, it is circumferentially uniformly distributed along internal layer floating drum outer wall, and be at internal layer floating drum outer wall sustained height；When internal layer floating drum and outside
1 to 2 meter of spacing is left between limit body B and limit body A when high in the center of layer floating drum.
During normal work, internal layer floating drum is placed among cylindrical channel, internal layer floating drum bossy body insertion cylindrical channel
Among slideway, internal layer floating drum is contacted with outer layer floating drum by eight drum apparatus, and 1 to 2 is left between limit body B and limit body A
The spacing of rice；By drum apparatus, internal layer floating drum and outer layer floating drum can be with the vertical direction relative motions, but cannot be in level
Relative motion on direction；In this way, each internal layer floating drum provides corresponding single rigid standpipe top tensile force and supports underwater respectively
Oil production equipment weight, outer layer floating drum provide mooring cable tension force and as the horizontal restraints of internal layer floating drum, realize rigid riser
With the catenary motion of mooring buoy and the decoupling of stress.
In view of installation of the current floating drum installation method both for single standpipe support floating drum, the present invention will also propose one
Kind standpipe produces monoblock type installation and recovery method of the support floating drum in ultra-deep-water from tension type under water.This method and existing list
The installation method of a standpipe support floating drum coordinates, it is possible to achieve neutral tube of the present invention produces support floating drum from tension type super under water
Installation and recycling in deep water.
A kind of standpipe produces the monoblock type installation method of support floating drum from tension type under water, comprises the following steps：
A, preparation work：
A1, by outer layer floating drum lifting be placed on semi-submerged ship main deck, then by internal layer floating drum be hung to cylindrical channel just on
Side, adjusts position and the angle of internal layer floating drum, until four bossy bodies of internal layer floating drum are respectively aligned to four on cylindrical channel
Bar slideway, internal layer floating drum is transferred to cylindrical channel；
A2, repeat A1 step operations, is sequentially completed the in place of all internal layer floating drums；Internal layer floating drum and outer layer floating drum are on the coast
Combination is completed, and forms combination floating drum；
B, the in place of floating drum is combined with sinking：
B1, using semi-submerged ship by combine floating drum tow to infield, each workboat is in place；Connected on outer layer floating drum normal
Hawser and anchor chain of installation exercise method etc. are advised, semi-submerged ship pressurization is carried underwater heavy and opened from combination floating drum floats across the sea；
The B2 while water filling into each internal layer floating drum ballast tank, internal layer floating drum slowly sink under the effect of gravity, until interior
Four limit body B on layer floating drum are contacted with four limit body A on outer layer floating drum respectively；Continue to each internal layer floating drum ballast
Cabin is filled to design flow, and the ballast water of the design flow causes its gravity G when internal layer floating drum is submerged in water completely1Still greater than buoyancy F1,
Outer layer floating drum sinks down into stopping slowly together under the towing of each internal layer floating drum with internal layer floating drum in the process, combines floating drum
Float across the sea；
Design flow is filled in B3, outer layers floating drum ballast tank, the ballast water of the design flow causes outer layer floating drum not have completely
Its buoyancy F when entering in water2More than gravity G2, in the process outer layer floating drum under the towing of each internal layer floating drum with internal layer floating drum
Sink slowly together until outer layer floating drum is submerged in water completely；
B4, when combine floating drum submerge completely in water when, the stress of in the vertical direction is：The buoyancy F of outer layer floating drum2
More than its gravity G2, the gravity G of internal layer floating drum1More than its buoyancy F1, and the sum of net buoyancy of all internal layer floating drums N (G1-F1) big
In the net buoyancy F of outer layer floating drum2-G2, wherein N is internal layer floating drum number, i.e. N (G1-F1)>(F2-G2)；In this stressing conditions
Under, internal layer floating drum can pull outer layer floating drum and stablize, and under this stressing conditions, internal layer floating drum can pull outer layer floating drum
Stablize and, and limit body B and limit body A is in close contact in sinking watching, outer layer floating drum does not have relatively with internal layer floating drum
Movement；
C, the underwater installation of floating drum is combined：
After C1, floating drum to be combined sink down into target depth, outer layer floating drum connects corresponding four mooring cables；Outer layers are floated
Cylinder injection nitrogen, outer layer floating drum float, and are tensioned mooring cable；During this internal layer floating drum due to limit body effect all the time with outside
Layer floating drum is without relative motion；
C2, first using one of internal layer floating drum as water in brace foundation installation rigid riser；Standpipe installation is complete it is backward in
Nitrogen is injected in layer floating drum, internal layer floating drum floats, and completes the connection with rigid riser, and be tensioned rigid riser；Internal layer floating drum floats
To design position, i.e. internal layer floating drum and the center of outer layer floating drum is contour, is left between limit body B and limit body A between 1 to 2 meter
Away from；
C3, repeat C2 steps, is sequentially completed the installation of all rigid risers；
So far, a kind of standpipe produces support floating drum from tension type and installs under water.
A kind of standpipe produces the monoblock type recovery method of support floating drum from tension type under water, comprises the following steps：
D1, first an internal layer floating drum ballast tank water filling, internal layer floating drum sink down into limit body B and are contacted with limit body A thereto,
Internal layer floating drum is fixedly supported on four limit body A；The connection of internal layer floating drum and rigid riser is disconnected, it is vertical to recycle rigidity
Pipe；After rigid riser recycles, inner layer floating drum injection nitrogen discharge ballast water, internal layer floating drum, which is stablized, to float, and is floated with outer layer
Continue to float until emersion sea level, the recycling of internal layer floating drum and submerged production equipment finish after cylinder separation；
D2, repeat D1 operations, is sequentially completed all rigid risers, internal layer floating drum and the recycling of submerged production equipment；
D3, outer layers floating drum ballast tank water filling, until mooring cable relaxes, disconnect the company of outer layer floating drum and mooring cable
Connect；Outer layers floating drum injects nitrogen, and outer layer floating drum, which is stablized, to float until emersion sea level；The recycling of outer layer floating drum finishes；
So far, a kind of standpipe produces support floating drum recycling from tension type and finishes under water.
The present invention has following significant technological progress：
1st, the present invention proposes a kind of from underwater production support floating drum is tensioned, and mainly includes outer layer floating drum and internal layer floating drum.Outside
Layer floating drum is responsible for providing mooring cable tensile force, and internal layer floating drum then provides rigid riser top tensile force, therefore underwater raw from being tensioned
Production support floating drum can easily provide top tensile force needed for rigid riser and mooring cable at the same time, in marine oil and gas engineering development
It could meet the requirement of practical implementation in system using this floating drum.
2nd, in the present invention from be tensioned underwater production support floating drum by the catenary motion of rigid riser and outer layer floating drum and
Stress decouples, and can reduce the stress and motion amplitude of rigid riser, is conducive to improve the intensity and fatigue behaviour of rigid riser.
3rd, an internal layer floating drum provides corresponding single rigid standpipe top tensile force in the present invention, realizes each rigidity and stands
The decoupling of movement and stress between pipe.When floating drum shifts, will not occur to push up tensile force between each rigid riser
Secondary distribution (the top tensile force of the top tensile force increase of upstream rigid riser downstream rigid riser at the same time reduces), be conducive to change
The intensity and fatigue behaviour of kind rigid riser；And the top tensile force of single rigid standpipe can be easily controlled, make it meet to use
Demand.
4th, the standpipe in the present invention produces support floating drum from tension type when shifting under water, will not cause mooring cable
With the secondary distribution of rigid riser top tensile force, therefore marine oil and gas Engineering Develop System for MSC can resist a degree of shallow-water wave
Wave, therefore floating drum can be arranged in the depth of water work of slightly shallow (50 to 100 meters), this can further reduce the performance to oil production equipment
It is required that the and technological requirement of installation and well workover.
5th, the present invention in outer layer floating drum using four mooring cable moorings on sea bed, when wherein any one hawser because
Therefore during fracture failure, remaining three hawsers remain to keep the stability of floating drum, ensure that marine oil and gas Engineering Develop System for MSC
Safety.
6th, the monoblock type installation method from the underwater production support floating drum of tensioning of the invention, by outer layer floating drum and internal layer floating drum
Installation combination on the coast, avoids the complex operations that floating drum combines under water；And a sinking watching is only needed to float outer layer
Cylinder and each internal layer floating drum are respectively mounted completion, save working hour and installation cost.
7th, being tensioned certainly in the present invention produces ballast of the support floating drum monoblock type installation method by adjusting floating drum under water, makes
Obtain outer layer floating drum gravity and be more than buoyancy, each internal layer float buoyancy is more than gravity.Under the action of limiting plate and guiding ring flat-plate, outside
Layer floating drum pulls internal layer floating drum and sinks, and supports floating drum not occur under water from the underwater production of tensioning with installation process sinking
Collision, has ensured the safety of installation exercise.
8th, the present invention during service, can carry out one of internal layer floating drum (or oil production equipment of its upper part installation)
Recycling and maintenance, without influencing other oil production equipment normal works；Each internal layer floating drum (rigid riser) can be returned successively
Receive, ensured the safety of removal process.
Brief description of the drawings
Fig. 1 is the schematic diagram of outer layer floating drum；
Fig. 2 is the sectional view of outer layer floating drum；
Fig. 3 is the schematic diagram of internal layer floating drum；
Fig. 4 is the sectional view of drum apparatus；
Fig. 5 is internal layer floating drum and the top view after outer layer pontoon combination；
Fig. 6 is the detail view that internal layer floating drum is placed among cylindrical channel：
Fig. 7 is internal layer floating drum and the schematic diagram after outer layer pontoon combination, and wherein outer layer floating drum only draws sectional view；
Fig. 8 is the schematic diagram when limit body B on internal layer floating drum is contacted with the limit body A on outer layer floating drum；
Fig. 9 is to combine the schematic diagram of floating drum floating across the sea；
Figure 10 is to combine floating drum to stablize the schematic diagram of sinking；
After Figure 11 is outer layer buoy mooring, internal layer floating drum is supported on the schematic diagram on limit body；
Figure 12 is schematic diagram of the rigid riser after installation is complete.
In figure：1st, outer layer floating drum, 2, cantilever floating drum, 3, cylindrical channel, 4, slideway, 5, limit body A, 6, internal layer floating drum,
7th, bossy body, 8, limit body B, 9, standpipe passage, 10, roller, 11, shaft, 12, bearing, 13, slideway bottom surface, 14, bossy body just
Face, 15, truss structure, 16, mooring cable, 17, pile foundation, 18, rigid riser, 19, well head head, 20, cylindrical channel inner wall,
21st, internal layer floating drum outer wall, 22, sea level, 23, sea bed.
Embodiment
Below in conjunction with the accompanying drawings to being further described through in the present invention from the underwater production support floating drum of tensioning.The present invention
Diagram produces support floating drum under water with being tensioned certainly in the ultra-deep-water marine oil and gas Engineering Develop System for MSC with five rigid risers
Exemplified by.
As shown in figs. 1-7, a kind of standpipe produces support floating drum, including outer layer floating drum 1 and internal layer floating drum from tension type under water
6, the outer layer floating drum 1 is nested with multiple internal layer floating drums 6；
1 main body of outer layer floating drum is cylindrical structure, and 1 outer wall lower edge of outer layer floating drum connects four cantilever floating drums
2, four cantilever floating drums 2 are evenly distributed, and radially, 2 end of cantilever floating drum uses truss structure 15, truss structure 15 it is outer
End connection mooring cable 16, outer layer floating drum 1 is by four 16 moorings of mooring cable in the pile foundation 17 of sea bed 23；In outer layer floating drum 1
Multiple cylindrical channels 3 are vertically arranged, for installing multiple internal layer floating drums 6；Cylindrical channel inner wall 20 is uniformly distributed along the circumference four
Vertical slideway 4, slideway 4 run through whole cylindrical channel inner wall 20；Inner wall center between adjacent two slideway 4, is floated from outer layer
Highly locate to set limit body A5 in 1 bottom 1/3 of cylinder；
6 main body of internal layer floating drum is cylindrical structure, its outside diameter is less than the diameter of cylindrical channel 3, internal layer floating drum
Outer wall 21 is uniformly distributed along the circumference four vertical bossy bodies 7, and 7 width B1 of bossy body is less than the width B of the slideway 4 in cylindrical channel 3,
Bossy body 7 and internal layer floating drum 6 are contour；The bossy body 7 is located in the slideway 4 in cylindrical channel 3；In adjacent two bossy body
Outer wall center between 7, from limit body B8 is provided with 6 bottom of internal layer floating drum, 1/2 height, limit body B8 positioned at cylinder with leading to
Limit body A5 in road 3 is engaged, the relative vertical motion of limitation internal layer floating drum 6 and outer layer floating drum 1；
6 top of internal layer floating drum is provided with a well head first 19, and there is standpipe passage 9 in the lower end of well head first 19, rigidity
The upper end of standpipe 18 is connected to the well head first 19 on 6 top of internal layer floating drum by standpipe passage 9；Oil recovery is installed on well head first 19 to set
Standby, internal layer floating drum 6 is used to provide corresponding the top tensile force of single rigid standpipe 18 and support oil production equipment.
Further, the bossy body front 14 is provided with two drum apparatus, is grown respectively positioned at bossy body front 14
Two trisections on side are highly located, and the drum apparatus is made of roller 10, shaft 11 and bearing 12, and 11 axis of shaft is vertical
In 7 side of bossy body, 12 length of bearing is equal with the width B1 in bossy body front 14, and roller 10 is installed on bearing by shaft 11
On 12；Roller 10 is in rolling contact with slideway bottom surface 13.
Further, the cantilever floating drum 2 is rectangular section cantilever floating drum.
Further, the cross section of the slideway 4 is rectangular section；The cross section of the bossy body 7 is cut for rectangle
Face.
Further, the limit body A5 is cuboid, has 4 in each cylindrical channel 3, along cylindrical channel
3 inner walls are circumferentially uniformly distributed, and are at 3 inner wall sustained height of cylindrical channel；The limit body B8 is cuboid, each internal layer
There are 4 on floating drum 6, it is circumferential uniformly distributed along internal layer floating drum outer wall 21, and be at 21 sustained height of internal layer floating drum outer wall；Work as internal layer
1 to 2 meter of spacing is left between limit body B8 and limit body A5 when high in the center of floating drum 6 and outer layer floating drum 1.
During normal work, internal layer floating drum 6 is placed among cylindrical channel 3, and the bossy body 7 of internal layer floating drum 6 is embedded in cylinder
Among the slideway 4 of passage 3, internal layer floating drum 6 is contacted with outer layer floating drum 1 by eight drum apparatus, limit body B8 and limit body A5
Between leave 1 to 2 meter of spacing；By drum apparatus, internal layer floating drum 6 can be transported with outer layer floating drum 1 with the vertical direction is opposite
It is dynamic, but cannot relative motion in the horizontal direction；In this way, each internal layer floating drum 6 provides corresponding single rigid standpipe 18 respectively
Top tensile force simultaneously supports submerged production weight of equipment, and outer layer floating drum 1 provides 16 tension force of mooring cable and as the water of internal layer floating drum 6
Flat constraint, realizes the catenary motion of rigid riser 18 and outer layer floating drum 1 and the decoupling of stress.
In view of installation of the current floating drum installation method both for single standpipe support floating drum, the present invention will also propose one
Kind standpipe produces monoblock type installation and recovery method of the support floating drum in ultra-deep-water from tension type under water.This method and existing list
The installation method of a standpipe support floating drum coordinates, it is possible to achieve neutral tube of the present invention produces support floating drum from tension type super under water
Installation and recycling in deep water.
As illustrated in figs. 8-12, a kind of standpipe produces the installation method of support floating drum from tension type under water, comprises the following steps：
A, preparation work：
The lifting of outer layer floating drum 1, be placed on semi-submerged ship main deck by A1, then internal layer floating drum 6 is being hung to cylindrical channel 3 just
Top, the position of adjustment internal layer floating drum 6 and angle, until four bossy bodies 7 of internal layer floating drum 6 are respectively aligned to cylindrical channel 3
On four slideways 4, internal layer floating drum 6 is transferred to cylindrical channel 3；
A2, repeat A1 step operations, is sequentially completed the in place of all internal layer floating drums 6；Internal layer floating drum 6 exists with outer layer floating drum 1
Combination is completed on the bank, forms combination floating drum；
B, the in place of floating drum is combined with sinking：
B1, using semi-submerged ship by combine floating drum tow to infield, each workboat is in place；Connected on outer layer floating drum 1
Hawser and anchor chain of conventional installation exercise method etc., semi-submerged ship pressurization are carried underwater heavy and opened from combination floating drum floats across the sea；
B2 while the water filling into each 6 ballast tank of internal layer floating drum, internal layer floating drum 6 slowly sink under the effect of gravity, until
Four limit body B8 on internal layer floating drum 6 are contacted with four limit body A5 on outer layer floating drum 1 respectively；Continue to float to each internal layer
6 ballast tanks of cylinder are filled to design flow, and the ballast water of the design flow causes its gravity G when internal layer floating drum 6 is submerged in water completely1It is still big
In buoyancy F1, in the process outer layer floating drum 1 sunk down into slowly together with internal layer floating drum 6 under the towing of each internal layer floating drum 6
Stop, combination floating drum floats across the sea；
Design flow is filled in B3,1 ballast tank of outer layers floating drum, the ballast water of the design flow make it that outer layer floating drum 1 is complete
Its buoyancy F when submerging in water2More than gravity G2, in the process outer layer floating drum 1 under the towing of each internal layer floating drum 6 with internal layer
Floating drum 6 sinks slowly together until outer layer floating drum 1 is submerged in water completely；
B4, when combine floating drum submerge completely in water when, the stress of in the vertical direction is：The buoyancy of outer layer floating drum 1
F2More than its gravity G2, the gravity G of internal layer floating drum 61More than its buoyancy F1, and the sum of net buoyancy of all internal layer floating drums 6 NG1-F1
More than the net buoyancy F of outer layer floating drum 12-G2, wherein N is 6 numbers of internal layer floating drum, i.e. NG1-F1>F2-G2；In this stressing conditions
Under, internal layer floating drum 6 can pull outer layer floating drum 1 and stablize, and under this stressing conditions, internal layer floating drum 6 can pull outer layer
Floating drum 1, which is stablized, to sink, and limit body B8 and limit body A5 is in close contact in sinking watching, and outer layer floating drum 1 and internal layer floating drum 6 are not
Have relative motion；
C, the underwater installation of floating drum is combined：
After C1, floating drum to be combined sink down into target depth, outer layer floating drum 1 connects corresponding four mooring cables 16；Outwards
Layer floating drum 1 injects nitrogen, and outer layer floating drum 1 floats, and is tensioned mooring cable 16；Internal layer floating drum 6 is due to the work of limit body during this
With all the time with outer layer floating drum 1 without relative motion；
C2, first install rigid riser 18 with one of internal layer floating drum 6 for brace foundation in water；Installation is complete for standpipe backward
Nitrogen is injected in internal layer floating drum 6, internal layer floating drum 6 floats, and completes the connection with rigid riser 18, and be tensioned rigid riser 18；It is interior
For layer floating drum 6 floating to design position, i.e. internal layer floating drum 6 and the center of outer layer floating drum 1 is contour, is stayed between limit body B8 and limit body A5
There is 1 to 2 meter of spacing；
C3, repeat C2 steps, is sequentially completed the installation of all rigid risers 18；
So far, a kind of standpipe produces support floating drum from tension type and installs under water.
A kind of standpipe produces the recovery method of support floating drum from tension type under water, comprises the following steps：
D1, first a 6 ballast tank water filling of internal layer floating drum, internal layer floating drum 6 sink down into limit body B8 and limit body A5 thereto
Contact, internal layer floating drum 6 are fixedly supported on four limit body A5；Internal layer floating drum 6 and the connection of rigid riser 18 are disconnected, is returned
Receive rigid riser 18；After rigid riser 18 recycles, inner layer floating drum 6 injects nitrogen discharge ballast water, and internal layer floating drum 6 is stablized
Float, continue to float after separating with outer layer floating drum 1 until emersion sea level 22, internal layer floating drum 6 and submerged production equipment are returned
Harvest complete；
D2, repeat D1 operations, is sequentially completed all rigid risers 18, internal layer floating drum 6 and the recycling of submerged production equipment；
D3, the 1 ballast tank water filling of outer layers floating drum, until mooring cable 16 relaxes, disconnect outer layer floating drum 1 and mooring cable 16
Connection；Outer layers floating drum 1 injects nitrogen, and outer layer floating drum 1, which is stablized, to float until emersion sea level 22；The recycling of outer layer floating drum 1
Finish；
So far, a kind of standpipe produces support floating drum recycling from tension type and finishes under water.
The present invention is not limited to the present embodiment, any equivalent concepts in the technical scope of present disclosure or changes
Become, be classified as protection scope of the present invention.
Claims (7)
1. a kind of standpipe produces support floating drum from tension type under water, it is characterised in that：Including outer layer floating drum (1) and internal layer floating drum
(6), the outer layer floating drum (1) is nested with multiple internal layer floating drums (6)；
Described outer layer floating drum (1) main body is cylindrical structure, and outer layer floating drum (1) outer wall lower edge connects four cantilever floating drums
(2), four cantilever floating drums (2) are evenly distributed, and radially, cantilever floating drum (2) end uses truss structure (15), truss knot
The outer end connection mooring cable (16) of structure (15), outer layer floating drum (1) is by stake of four mooring cable (16) moorings in sea bed (23)
On base (17)；Multiple cylindrical channels (3) are vertically arranged in outer layer floating drum (1), for installing multiple internal layer floating drums (6)；Cylinder
Shape vias inner walls (20) are uniformly distributed along the circumference four vertical slideways (4), and slideway (4) runs through whole cylindrical channel inner wall (20)；
Inner wall center between adjacent two slideway (4), highly locates to set limit body A (5) from outer layer floating drum (1) bottom 1/3；
Described internal layer floating drum (6) main body is cylindrical structure, its outside diameter is less than the diameter of cylindrical channel (3), internal layer floating drum
Outer wall (21) is uniformly distributed along the circumference four vertical bossy bodies (7), bossy body (7) width
B1 is less than the width B of the slideway (4) in cylindrical channel (3), and bossy body (7) and internal layer floating drum (6) are contour；Described is convex
Go out in the slideway (4) that body (7) is located in cylindrical channel (3)；Outer wall center between adjacent two bossy body (7), from internal layer
Limit body B (8), limit body B (8) and the limit body A in cylindrical channel (3) are provided with 1/2 height of floating drum (6) bottom
(5) it is engaged, the relative vertical motion of limitation internal layer floating drum (6) and outer layer floating drum (1)；
Described internal layer floating drum (6) top is provided with a well head head (19), and there is standpipe passage (9) in the lower end of well head head (19),
The upper end of rigid riser (18) is connected to the well head head (19) on internal layer floating drum (6) top by standpipe passage (9)；Well head head (19)
On oil production equipment is installed, internal layer floating drum (6) is used to provide corresponding single rigid standpipe (18) top tensile force and support is recovered the oil
Equipment.
2. a kind of standpipe according to claim 1 produces support floating drum from tension type under water, it is characterised in that：Bossy body is just
Face (14) is provided with two drum apparatus, and two trisections positioned at positive (14) long side of bossy body are highly located respectively, described
Drum apparatus is made of roller (10), shaft (11) and bearing (12), and shaft (11) axis is perpendicular to bossy body (7) side, branch
Seat (12) length is equal with the width B1 of bossy body positive (14), and roller (10) is installed on bearing (12) by shaft (11)；
Roller (10) is in rolling contact with slideway bottom surface (13).
3. a kind of standpipe according to claim 1 produces support floating drum from tension type under water, it is characterised in that：Described is outstanding
Arm floating drum (2) is rectangular section cantilever floating drum.
4. a kind of standpipe according to claim 1 produces support floating drum from tension type under water, it is characterised in that：The cunning
The cross section in road (4) is rectangular section；The cross section of the bossy body (7) is rectangular section.
5. a kind of standpipe according to claim 1 produces support floating drum from tension type under water, it is characterised in that：The limit
Position body A (5) is cuboid, has 4 in each cylindrical channel (3), circumferentially uniformly distributed along cylindrical channel (3) inner wall, and is located
At cylindrical channel (3) inner wall sustained height；The limit body B (8) is cuboid, has 4 on each internal layer floating drum (6)
It is a, it is circumferentially uniformly distributed along internal layer floating drum outer wall (21), and be at internal layer floating drum outer wall (21) sustained height；When internal layer floating drum (6)
With the center of outer layer floating drum (1) when high, 1 to 2 meter of spacing is left between limit body B (8) and limit body A (5).
6. a kind of standpipe produces the installation method of support floating drum from tension type under water, it is characterised in that：Comprise the following steps：
A, preparation work：
Outer layer floating drum (1) lifting, be placed on semi-submerged ship main deck by A1, then that internal layer floating drum (6) is hung to cylindrical channel (3) is logical
The surface in road, the position of adjustment internal layer floating drum (6) and angle, until four bossy bodies (7) of internal layer floating drum (6) are respectively aligned to
Four slideways (4) on cylindrical channel (3) passage, among internal layer floating drum (6) decentralization to cylindrical channel (3) passage；
A2, repeat A1 step operations, is sequentially completed the in place of all internal layer floating drums (6)；Internal layer floating drum (6) and outer layer floating drum (1)
Combination is completed on the coast, forms combination floating drum；
B, the in place of floating drum is combined with sinking：
B1, using semi-submerged ship by combine floating drum tow to infield, each workboat is in place；Connected on outer layer floating drum (1) normal
The hawser and anchor chain of installation exercise method are advised, semi-submerged ship pressurization is carried underwater heavy and opened from combination floating drum floats across the sea；
B2 while the water filling into each internal layer floating drum (6) ballast tank, internal layer floating drum (6) slowly sink under the effect of gravity, until
Four limit body B (8) on internal layer floating drum (6) contact with four limit body A (5) on outer layer floating drum (1) respectively；Continue to each
A internal layer floating drum (6) ballast tank is filled to design flow, when the ballast water of the design flow make it that internal layer floating drum (6) is submerged in water completely
Its gravity G1Still greater than buoyancy F1, in the process outer layer floating drum (1) under the towing of each internal layer floating drum (6) with internal layer floating drum
(6) stopping is sunk down into slowly together, and combination floating drum floats across the sea；
Design flow is filled in B3, outer layers floating drum (1) ballast tank, the ballast water of the design flow make it that outer layer floating drum (1) is complete
Its buoyancy F when submerging in water2More than gravity G2, in the process outer layer floating drum (1) under the towing of each internal layer floating drum (6) with
Internal layer floating drum (6) sinks slowly together until outer layer floating drum (1) is submerged in water completely；
B4, when combine floating drum submerge completely in water when, the stress of in the vertical direction is：The buoyancy F of outer layer floating drum (1)2Greatly
In its gravity G2, the gravity G of internal layer floating drum (6)1More than its buoyancy F1, and the sum of net buoyancy of all internal layer floating drums (6) N (G1-
F1) it is more than the net buoyancy F of outer layer floating drum (1)2-G2, wherein N is internal layer floating drum (6) number, i.e. N (G1-F1)>(F2-G2)；At this
Under kind stressing conditions, internal layer floating drum (6) can pull outer layer floating drum (1) and stablize, under this stressing conditions, internal layer floating drum
(6) outer layer floating drum (1) can be pulled and stablize, and limit body B (8) and limit body A (5) is in close contact in sinking watching,
Outer layer floating drum (1) does not have relative motion with internal layer floating drum (6)；
C, the underwater installation of floating drum is combined：
After C1, floating drum to be combined sink down into target depth, outer layer floating drum (1) connects corresponding four mooring cables (16)；Outwards
Layer floating drum (1) injection nitrogen, outer layer floating drum (1) float, tensioning mooring cable (16)；Internal layer floating drum (6) is due to limit during being somebody's turn to do
The effect of position body is all the time with outer layer floating drum (1) without relative motion；
C2, first install rigid riser (18) with one of internal layer floating drum (6) for brace foundation in water；Installation is complete for standpipe backward
Injection nitrogen in internal layer floating drum (6), internal layer floating drum (6) float, and complete the connection with rigid riser (18), and be tensioned rigid riser
(18)；Internal layer floating drum (6) is floating to design position, i.e. internal layer floating drum (6) and the center of outer layer floating drum (1) is contour, limit body B (8)
1 to 2 meter of spacing is left between limit body A (5)；
C3, repeat C2 steps, is sequentially completed the installation of all rigid risers (18)；
So far, a kind of standpipe produces support floating drum from tension type and installs under water.
7. a kind of standpipe produces the recovery method of support floating drum from tension type under water, it is characterised in that：Comprise the following steps：
D1, first internal layer floating drum (6) ballast tank water filling, internal layer floating drum (6) sink down into limit body B (8) and limit body A thereto
(5) contact, internal layer floating drum (6) is fixedly supported on four limit body A (5)；Disconnect internal layer floating drum (6) and rigid riser
(18) connection, recycling rigid riser (18)；After rigid riser (18) recycles, inner layer floating drum (6) injection nitrogen discharge
Ballast water, internal layer floating drum (6), which is stablized, to float, and continues to float after separating with outer layer floating drum (1) until emersion sea level (22), interior
The recycling of layer floating drum (6) and submerged production equipment finishes；
D2, repeat D1 operations, is sequentially completed all rigid risers (18), internal layer floating drum (6) and the recycling of submerged production equipment；
D3, outer layers floating drum (1) ballast tank water filling, until mooring cable (16) relaxation, disconnects outer layer floating drum (1) and mooring cable
(16) connection；Outer layers floating drum (1) injects nitrogen, and outer layer floating drum (1), which is stablized, to float until emersion sea level (22)；Outer layer floats
The recycling of cylinder (1) finishes；
So far, a kind of standpipe produces support floating drum recycling from tension type and finishes under water.
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| CN111232142B (en) * | 2020-01-15 | 2020-10-27 | 中国海洋石油集团有限公司 | Horizontal flexible bearing structure of formula riser is opened on top |
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|---|---|---|---|---|
| US4585373A (en) * | 1985-03-27 | 1986-04-29 | Shell Oil Company | Pitch period reduction apparatus for tension leg platforms |
| CN1063082A (en) * | 1990-12-10 | 1992-07-29 | 国际壳牌研究有限公司 | Carry out the method and system of offshore well operation |
| CN201961509U (en) * | 2010-06-09 | 2011-09-07 | 中国海洋石油总公司 | Unconditional stability equipped deep-draft floating oil production platform |
| EP2905215A1 (en) * | 2012-10-08 | 2015-08-12 | Iberdrola Ingeniería Y Construcción, S.A.U. | Tension-leg floating platform that is particularly suitable for harnessing wind energy |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150099062A (en) * | 2014-02-21 | 2015-08-31 | 대우조선해양 주식회사 | Mobile type tension leg platform |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4585373A (en) * | 1985-03-27 | 1986-04-29 | Shell Oil Company | Pitch period reduction apparatus for tension leg platforms |
| CN1063082A (en) * | 1990-12-10 | 1992-07-29 | 国际壳牌研究有限公司 | Carry out the method and system of offshore well operation |
| CN201961509U (en) * | 2010-06-09 | 2011-09-07 | 中国海洋石油总公司 | Unconditional stability equipped deep-draft floating oil production platform |
| EP2905215A1 (en) * | 2012-10-08 | 2015-08-12 | Iberdrola Ingeniería Y Construcción, S.A.U. | Tension-leg floating platform that is particularly suitable for harnessing wind energy |
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