CN106697208A - Underwater integrated type system for vertical pipe production and conveying and mounting method thereof - Google Patents
Underwater integrated type system for vertical pipe production and conveying and mounting method thereof Download PDFInfo
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- CN106697208A CN106697208A CN201611100336.0A CN201611100336A CN106697208A CN 106697208 A CN106697208 A CN 106697208A CN 201611100336 A CN201611100336 A CN 201611100336A CN 106697208 A CN106697208 A CN 106697208A
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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
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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
- B63B75/00—Building or assembling floating offshore structures, e.g. semi-submersible platforms, SPAR platforms or wind turbine platforms
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Abstract
The invention discloses an underwater integrated type system for vertical pipe production and conveying and a mounting method thereof. The system comprises a vertical pipe production assembly, a vertical pipe control assembly, a combination pontoon and a mooring device. The combination pontoon comprises an outer-layer pontoon body and inner-layer pontoon bodies, and the inner-layer pontoon bodies are embedded into the outer-layer pontoon body in a sleeved mode. The outer-layer pontoon body is responsible for supplying cable mooring tensile force, and all the inner-layer pontoon bodies are each responsible for supplying top tensile force to a single corresponding rigid production vertical pipe or rigid protection pipe, so that vertical stress and motion decoupling of the mooring device and all the vertical pipes are achieved, stress and motion decoupling between all the vertical pipes are also improved, and the requirement of in-place performance of the rigid production vertical pipes is improved. According to the underwater integrated type system for vertical pipe production and conveying and the mounting method thereof, a lower-section pipe cable of a flexible control pipe cable is uniformly integrated and assembled in the rigid protection pipe, and thus the problem of complex galloping damage is avoided; and the inner-layer pontoon bodies can freely rise and fall along the outer-layer pontoon body, and thus the thermal expansion requirement of the rigid production vertical pipes is met.
Description
Technical field
The present invention relates to the dry type production platform of offshore and gas development technical field, and in particular to one kind is applied to ultra-deep-water
The production riser system and its installation method of dry type production platform under marine environment.
Background technology
At present, it is adaptable to which the dry type production platform of deep-sea oil gas exploitation has two kinds：TLP platforms and Spar platforms.Dry type is adopted
The adaptive type production riser system of oily platform is top tensioned risers (Top Tensioned Riser, abbreviation TTR).Existing TTR
Structural shape it is vertical using Double-layer sleeve-type standpipe (the outer protection tube, internal layer protection pipe and production delivery pipe) or individual layer bushing type
Pipe (the outer protection tube and production delivery pipe).The Main Function of sleeve pipe be prevention production delivery pipe leakage caused by marine environment
Pollution is unbalance with pressure integrity.Because sleeve pipe deadweight is much larger than production delivery pipe, therefore Double-layer sleeve-type standpipe and individual layer
Bushing type standpipe is required to huge top tensile force and is supported.For TLP platforms, TTR's pushes up master of the tensile force by TLP platforms
Body buoyancy directly takes on, therefore increases size of main body and the deadweight of TLP platforms, limits hair of the TLP platforms in deeper marine site
Exhibition application.For Spar platforms, the top tensile force of TTR is undertaken by top buoyancy tank, therefore increases the size of main body of buoyancy can,
Further increase size of main body and the deadweight of Spar platforms.
In order to reduce deadweights of the TTR in the oil and gas development application of ultra-deep sea, document OTC15100 (George Z.Gu, Rod
Myers,Robert Sokoll,Joe Jin,Kevin Huang.Technical Feasibility of Tubing
Risers.Offshore Technology Conference, Houston, 2003.) a solution is proposed first.
In the program, the structural shape of TTR only has production delivery pipe, and without the outer protection tube and internal layer protection pipe；Control umbilical is put down
Row or winding are arranged in production delivery pipe outer rim.However, the technical scheme has following technical limitation：
1st, production conveying standpipe is acted on by disastrous Marine Environmental Elements (high wind, billow and sea high current), production conveying
Standpipe is easily interfered, ripple causes fatigue damage and VIV fatigue damages etc., and then causes production conveying standpipe that rupture and crude oil occur
Leakage；
2nd, the missing of the outer protection tube and internal layer protection pipe causes the axial rigidity for producing delivery pipe to substantially reduce, to meet
The interference requirement of adjacent production conveying standpipe, need to increase the top design spacing of production conveying standpipe, be that this need to increase dry type and adopts
The floor space of oily platform, increases the size of main body of dry type production platform；
3rd, the outer protection tube and internal layer protection pipe are lacked, thermal expansion causes production delivery pipe elongation 1.2m or so, needed for this
Increase the altitude above deck of dry type production platform, increase the size of main body of dry type production platform；
4th, the missing of the outer protection tube and internal layer protection pipe causes control umbilical unprotect passage, control umbilical need it is parallel or
Winding is arranged in the outer rim of production delivery pipe, and then causes to produce the asymmetric of delivery pipe cross section, so as to trigger speeding for complexity
Shake destruction problem.
The content of the invention
In order to solve existing production conveying standpipe technology above mentioned problem, this hair present in the oil and gas development application of ultra-deep sea
It is bright that a kind of integrated form under water production conveying riser systems and its installation method for realizing following purpose to be provided：
1st, production conveying tracheal rupture and crude oil leakage are prevented；
2nd, prevent from production delivery pipe from galloping occurring to destroy；
3rd, the size of main body of dry type production platform is reduced.
To achieve these goals, technical scheme is as follows：
A kind of production of integrated form under water conveying riser systems, including production riser component, control riser assemblies, combination floating drum
And mooring gear；
Described production riser component includes flexible production standpipe with rigid production riser, described control riser assemblies bag
Rigid protective pipe and Flexible Control umbilical are included, described combination floating drum includes outer layer floating drum and internal layer floating drum；Described internal layer is floated
Cylinder is nested in outer layer floating drum；
Described outer layer float body is ring cylinder structure, and outer layer floating drum outer wall bottom margin 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
Pool hawser, outer layer floating drum is by four mooring cable moorings on sea bed；Outer layer floating drum inwall is uniformly distributed along the circumference four vertical slideways,
Slideway runs through whole outer layer floating drum inwall；Inwall center between adjacent two vertical slideways, sets at the pillar height of clearing from buoy bottom 1/3
Put limit body A；
Described internal layer float body is cylindrical structure, and internal layer floating drum outer wall is uniformly distributed along the circumference four vertical bossy bodies,
Bossy body width B1 is less than the width B of slideway, and bossy body is contour with internal layer floating drum；Described bossy body is located at the cunning of outer layer floating drum
In road；Outer wall center between adjacent two bossy body, sets limit body B, limit body B and position at the pillar height of clearing from buoy bottom 1/2
It is engaged in the limit body A on outer layer floating drum, the relative vertical motion of limitation internal layer floating drum and outer layer floating drum；
The top of described rigid production riser passes through the standpipe passage of internal layer floating drum, and is connected with internal layer floating drum top；
The bottom connection stress joint of described rigid production riser, the bottom connection subsea wellheads globe valve of stress joint；Described
Well head globe valve and the oral connection of submarine well, and integrated control module A；Described well head globe valve in working order under, it is and firm
Property production riser UNICOM；In case of emergency it is rotated by 90 °, closes rigid production riser and the oral interface channel of submarine well；Institute
The bottom of the flexible production standpipe stated is connected with rigid production riser top, and the top of described flexible production standpipe is adopted with dry type
Oil tree connection；Described dry type tree is located on the deck of dry type production platform；
The top of described rigid protective pipe passes through the standpipe passage of internal layer floating drum, and is connected with internal layer floating drum top；Institute
The Flexible Control umbilical stated is made up of epimere umbilical and hypomere umbilical, described rigid protective pipe for hypomere umbilical provide installation with
Protection passage；Described rigid protective pipe top sets umbilical joint, and epimere umbilical and hypomere umbilical are connected by umbilical joint；
Described rigid protective ttom of pipe end is connected with stress joint, and the bottom of stress joint is connected with control module B, control module B's
Bottom is fixed on rigid protective pedestal tube；Described Flexible Control umbilical is used to control underground chemical reagent to inject, and carries out well
Lower pressure and temperature information are gathered, and control the closure of storm valve and the closure of control well head globe valve；Described flexibility
The top of control umbilical is connected with control centre, its bottom is connected through rigid protective pipe with control module B；In described control
The heart is located on the deck of dry type production platform；
Described outer layer floating drum is connected with mooring gear；
Connected by fly line between described control module A and control module B, described fly line is signal cable.
Further, described one group of group of correspondence production riser component two to four of control riser assemblies.
Further, described combination floating drum floating drum is immersed in 30~200m depths under sea.
Further, described bossy body front is provided with two drum apparatus, respectively positioned at bossy body front side long
Two trisections are highly located, and described drum apparatus are made up of roller, rotating shaft and bearing, and shaft axis are perpendicular to protrusion side
Face, width B1 positive with bossy body is equal for standoff length, and roller is arranged on bearing by rotating shaft；Roller is rolled with slideway bottom surface
Dynamic contact.
Further, described cantilever floating drum is square-section cantilever floating drum.
Further, the cross section of described slideway is square-section；The cross section of described bossy body is square-section.
Further, described limit body A is cuboid, has 4, circumferential uniform along outer layer floating drum inwall, and is in
At outer layer floating drum inwall sustained height；Described limit body B is cuboid, has 4, circumferential uniform along internal layer floating drum outer wall,
And be at internal layer floating drum outer wall sustained height；When the center grade height of internal layer floating drum and outer layer floating drum, limit body B and limit body
1 to 2 meter of spacing is left between A.
A kind of installation method of the production of integrated form under water conveying riser systems, comprises the following steps：
A, preparation work：
The lifting of outer layer floating drum is placed on semi-submerged ship main deck, then internal layer floating drum is hung to directly over outer layer floating drum, adjustment
The position of internal layer floating drum and angle, until four bossy bodies of internal layer floating drum are respectively aligned to four slideways of outer layer floating drum, will be interior
Layer floating drum is transferred to outer layer floating drum, constitutes combination floating drum；
The in place and sinking of B, combination floating drum：
B1, using semi-submerged ship by combine floating drum tow to infield, each workboat is in place；Connected on outer layer floating drum normal
The hawser and anchor chain of installation exercise method are advised, semi-submerged ship pressurization is carried and sink under water and open from combination floating drum is floating across the sea；
Water filling in B2, inner layer floating drum ballast tank, internal layer floating drum slowly sinks under gravity, until on internal layer floating drum
Four limit body B be in contact with four limit body A on outer layer floating drum respectively；Continuation inner layer floating drum ballast tank is filled to and sets
Metering, its gravity G when the ballast water of the design flow causes that internal layer floating drum submerges in water completely1Still greater than buoyancy F1, in the process
Outer layer floating drum sinks down into stopping slowly together under the towing of internal layer floating drum with internal layer floating drum, and combination floating drum is floating across the sea；
Design flow is filled in B3, outer layers floating drum ballast tank, the ballast water of the design flow causes that outer layer floating drum does not have completely
Its buoyancy F when entering in water2More than its gravity G2, in the process outer layer floating drum under the towing of internal layer floating drum with internal layer floating drum one
Rise and slowly sink in outer layer floating drum submerges water completely；
B4, when combining floating drum and submerging completely in water, 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 internal layer floating drum net buoyancy G1-F1More than outer layer floating drum
Net buoyancy F2-G2, i.e.,：(G1-F1)>(F2-G2)；Under this stressing conditions, internal layer floating drum can be pulled under outer layer floating drum stabilization
It is heavy, and limit body B and limit body A is in close contact in sinking watching, outer layer floating drum does not have relative motion with internal layer floating drum；
C, the Underwater Navigation of combination floating drum are installed
After combination floating drum sinks down into target depth, the cantilever floating drum of outer layer floating drum is connected with corresponding mooring gear, positioning
In sea bed；Outer layer floating drum is filled with nitrogen, and outer layer floating drum floats, and is tensioned mooring cable；In the process, limit body A and limit body B
Interact, internal layer floating drum floats jointly in the presence of outer layer floating drum limit body A；
The installation under water of D, rigid production riser and rigid protective pipe
The rigid production riser of D1, one by one installation：
D2, first the hypomere umbilical of Flexible Control umbilical is arranged in rigid protective pipe by umbilical joint, then by dry
Formula production platform lifts rigid protective pipe, makes the bottom of rigid protective pipe by the standpipe passage and control mould of corresponding internal layer floating drum
Block B is connected with rigid protective pedestal tube, the connection of the top of top and internal layer floating drum；
Nitrogen injection in D3, inner layer floating drum, makes internal layer floating drum be floated along slideway, while being tensioned rigid production riser and just
Property protection pipe, internal layer floating drum is contour with the center of outer layer floating drum floating to design attitude, i.e. internal layer floating drum, limit body B and limit body A
Between leave 1 to 2 meter of spacing；
The installation under water of E, flexible production standpipe and Flexible Control umbilical
E1, flexible production standpipe is lifted by dry type production platform, make flexible production bottom of vertical with rigid production riser
Top connection, flexible production riser top ends are connected with the dry type tree on dry type production platform deck；
E2, by dry type production platform lift Flexible Control umbilical, make the epimere umbilical bottom of Flexible Control umbilical with it is firm
Property protection pipe top umbilical joint connection, epimere umbilical top be located at dry type production platform deck control centre be connected；
So far, a kind of production of integrated form under water conveying riser systems are installed.
Relative to existing production conveying riser systems, the present invention has following significant technological progress：
1st, the hypomere umbilical unification of Flexible Control umbilical of the invention integrated is assemblied in rigid protective pipe, it is to avoid hypomere
Arrangement of the umbilical in rigid production riser outer rim, it is to avoid rigid production riser cross section it is asymmetric, so as to avoid triggering multiple
Miscellaneous galloping destruction problem.
2nd, combination floating drum of the invention includes outer layer floating drum and internal layer floating drum, and production conveying standpipe is by the unification of internal layer floating drum
Tightly, under the effect of outside environmental load, there is lateral shift in internal layer floating drum, will cause the secondary of production conveying standpipe top tensile force
Distribution (reduces the top tensile force of downstream production conveying standpipe) while the top tensile force for increasing production upstream conveying standpipe, be beneficial to
The feasibility interfered between reducing production conveying standpipe, it is therefore not necessary to the top design spacing of production delivery pipe is increased, so that
The floor space and size of main body of dry type production platform can be reduced；
3rd, combination floating drum of the invention includes outer layer floating drum and internal layer floating drum, and internal layer floating drum can be along the slideway of outer layer floating drum certainly
By lifting, the thermal expansion requirement of rigid production riser is met；The altitude above deck and size of main body of dry type production platform need not be increased.
4th, combination floating drum of the invention includes outer layer floating drum and internal layer floating drum, and outer layer floating drum is responsible for providing mooring cable tensioning
Power, internal layer floating drum is responsible for providing the top tensile force for producing conveying standpipe and control standpipe, and the two decoupling mooring gear is defeated with production
Send stress and the motion of standpipe and control standpipe；Therefore, under the effect of outside environmental load, combination floating drum shifts, no
The secondary distribution of mooring cable and production conveying standpipe top tensile force can be caused, the top tensile force of production conveying standpipe is content with very little
Service demand in place, improves the performance requirement in place of production conveying standpipe.
5th, combination floating drum of the invention is by adjusting the ballast situation of internal layer floating drum and outer layer floating drum, and limit body A and
The interaction of limit body B, it is to avoid combination floating drum collides in installation process, realizes monoblock type installation, simplifies peace
Dress technique, reduces installation cost, has ensured installation exercise safety.
6th, the outer layer floating drum in the present invention has four cantilever floating drums, you can using four mooring cable moorings in sea bed
On, when wherein any one hawser occurs fracture failure, remaining three hawsers remain to keep the stability of outer layer floating drum, from
And further ensure that the security of oil and gas development system.
7th, rigid production riser of the invention is located at 30~200m depths under sea, reduces the disastrous ocean ring in sea
Border key element (high wind, billow and high current) is acted on, and reduces closing well frequency, therefore single well head globe valve can be as producing well
Control device, without using the complicated and high production tree of cost as well control device, closes by being in case of emergency rotated by 90 °
The oil-gas transportation passage of rigid production riser is closed, operation is simple and feasible, cheap.
8th, the present invention uses single well head globe valve as production well control device, without using the oil recovery of bulky
Tree, well head globe valve can simultaneously be carried out with the installation of rigid production riser, install simple, shorten installation period, reduce operation into
This.
9th, rigid production riser of the invention is located at 30~200m depths under sea, reduces the disastrous ocean ring in sea
Border key element (high wind, billow and high current) is acted on, and the probability that adjacent rigid production riser collides is reduced, while reducing ripple
Cause fatigue damage and VIV to cause fatigue damage, rupture and crude oil leakage probability occur so as to reduce rigid production riser.
Brief description of the drawings
Total 9, the accompanying drawing of the present invention, wherein：
Fig. 1 is overall structure diagram of the invention (front view).
Fig. 2 is the structural representation (front view) of production conveying standpipe of the invention and control standpipe.
Fig. 3 is the structural representation of outer layer floating drum.
Fig. 4 is the sectional view of outer layer floating drum.
Fig. 5 is the structural representation of internal layer floating drum.
Fig. 6 is the sectional view of drum apparatus.
Fig. 7 is the top view for combining floating drum.
Fig. 8 is the sectional view for combining floating drum.
Fig. 9 is internal layer floating drum limit body B and outer layer floating drum limit body A interaction schematic diagrames.
In figure：1st, outer layer floating drum, 2, cantilever floating drum, 3, slideway, 4, limit body A, 5, internal layer floating drum, 6, bossy body, 7, limit
Position body B, 8, roller, 9, rotating shaft, 10, bearing, 11, standpipe passage, 14, mooring gear, 15, combination floating drum, 20, sea, 21, sea
Bed, 22, dry type tree, 23, control centre, 25, dry type production platform, 30, Flexible Control umbilical, 31, flexible production standpipe,
40th, rigid protective pipe, 41, rigid production riser, 42, stress joint, 43, submarine well it is oral, 44, rigid protective pedestal tube, 45,
Well head globe valve, 46, control module A, 47, control module B, 48, fly line.
Specific embodiment
The present invention is further described through below in conjunction with the accompanying drawings.Present invention diagram is with four production conveying standpipes
It is described with as a example by 1 control standpipe.
As shown in figs 1-9, a kind of production of integrated form under water conveying riser systems, including production riser component, control standpipe
Component, combination floating drum 15 and mooring gear 14；
Described production riser component includes flexible production standpipe 31 with rigid production riser 41, described control standpipe group
Part includes rigid protective pipe 40 and Flexible Control umbilical 30, and described combination floating drum 15 includes outer layer floating drum 1 and internal layer floating drum 5；
Described internal layer floating drum 5 is nested in outer layer floating drum 1；
The described main body of outer layer floating drum 1 is ring cylinder structure, and the outer wall bottom margin of outer layer floating drum 1 connects four cantilever floating drums
2, four cantilever floating drums 2 are evenly distributed, and radially, the end of cantilever floating drum 2 uses the outer end of truss structure, truss structure to connect
Mooring cable is connect, outer layer floating drum 1 is by four mooring cable moorings on sea bed 21；The inwall of outer layer floating drum 1 is uniformly distributed along the circumference four
Vertical slideway 3, slideway 3 runs through the whole inwall of outer layer floating drum 1；Inwall center between adjacent two vertical slideways 3, clearing from buoy bottom
Hold and limit body A4 is set at 1/3 pillar height；
The described main body of internal layer floating drum 5 is cylindrical structure, and the outer wall of internal layer floating drum 5 is uniformly distributed along the circumference four vertical bossy bodies
6, the width B1 of bossy body 6 are less than the width B of slideway 3, and bossy body 6 is contour with internal layer floating drum 5；Described bossy body 6 is located at outer layer
In the slideway 3 of floating drum 1；Outer wall center between adjacent two bossy body 6, sets limit body B7 at the pillar height of clearing from buoy bottom 1/2,
Limit body B7 is engaged with the limit body A4 on outer layer floating drum 1, the opposed vertical of limitation internal layer floating drum 5 and outer layer floating drum 1
Motion；
The top of described rigid production riser 41 through internal layer floating drum 5 standpipe passage 11, and with the top of internal layer floating drum 5
Connection；The bottom connection stress joint 42 of described rigid production riser 41, the bottom connection subsea wellheads ball of stress joint 42
Shape valve 45；Described well head globe valve 45 oral with submarine well 43 is connected, and integrated control module A46；Described well head is spherical
Valve 45 in working order under, with the UNICOM of rigid production riser 41；In case of emergency it is rotated by 90 °, closes rigid production riser 41
Oral with submarine well 43 interface channel；The bottom of described flexible production standpipe 31 is connected with the rigid top of production riser 41,
The top of described flexible production standpipe 31 is connected with dry type tree 22；It is flat that described dry type tree 22 is located at dry type oil recovery
On the deck of platform 25；
The top of described rigid protective pipe 40 passes through the standpipe passage 11 of internal layer floating drum 5, and connects with the top of internal layer floating drum 5
Connect；Described Flexible Control umbilical 30 is made up of epimere umbilical and hypomere umbilical, and described rigid protective pipe 40 is hypomere umbilical
There is provided and install and protection passage；The described top of rigid protective pipe 40 sets umbilical joint, and epimere umbilical and hypomere umbilical pass through
Umbilical joint is connected；The described bottom of rigid protective pipe 40 is connected with stress joint 42, bottom and the control mould of stress joint 42
Block B47 is connected, and the bottom of control module B47 is fixed on rigid protective pedestal tube 44；Described Flexible Control umbilical 30 is used for
Control underground chemical reagent injection, carries out down-hole pressure and temperature information collection, controls closure and the control of storm valve
The closure of well head globe valve 45；The top of described Flexible Control umbilical 30 is connected with control centre 23, its bottom passes through rigidity
Protection pipe 40 is connected with control module B47；Described control centre 23 is located on the deck of dry type production platform 25；
Described outer layer floating drum 1 is connected with mooring gear 14；
Connected by fly line 48 between described control module A46 and control module B47, described fly line 48 is holding wire
Cable.
Further, described one group of group of correspondence production riser component two to four of control riser assemblies.
Further, the described floating drum of combination floating drum 15 is immersed in the 30~200m depths of sea 20 times.
Further, the described front of bossy body 6 is provided with two drum apparatus, respectively positioned at the front of bossy body 6 side long
Two trisections highly locate, described drum apparatus are made up of roller 8, rotating shaft 9 and bearing 10, and the axis of rotating shaft 9 is perpendicular to convex
Go out the side of body 6, width B1 positive with bossy body 6 is equal for the length of bearing 10, roller 8 is arranged on bearing 10 by rotating shaft 9；Rolling
Cylinder 8 is in rolling contact with the bottom surface of slideway 3.
Further, described cantilever floating drum 2 is square-section cantilever floating drum.
Further, the cross section of described slideway 3 is square-section；The cross section of described bossy body 6 is cut for rectangle
Face.
Further, described limit body A4 is cuboid, has 4, circumferential uniform along the inwall of outer layer floating drum 1, and is located
At the inwall sustained height of outer layer floating drum 1；Described limit body B7 is cuboid, 4 is had, along the outer wall circumference of internal layer floating drum 5
Uniformly, and it is at the outer wall sustained height of internal layer floating drum 5；When the center grade height of internal layer floating drum 5 and outer layer floating drum 1, limit body
1 to 2 meter of spacing is left between B7 and limit body A4.
A kind of installation method of the production of integrated form under water conveying riser systems, comprises the following steps：
A, preparation work：
The lifting of outer layer floating drum 1 is placed on semi-submerged ship main deck, then internal layer floating drum 5 is hung to directly over outer layer floating drum 1, adjusted
The position of whole internal layer floating drum 5 and angle, until four bossy bodies 6 of internal layer floating drum 5 are respectively aligned to four slideways of outer layer floating drum 1
3, internal layer floating drum 5 is transferred to outer layer floating drum 1, constitute combination floating drum 15；
The in place and sinking of B, combination floating drum 15：
B1, using semi-submerged ship by combine floating drum 15 tow to infield, each workboat is in place；Connect on outer layer floating drum 1
The hawser and anchor chain of conventional installation exercise method are connect, semi-submerged ship pressurization is carried and sink under water and open from combination floating drum 15 floats over sea
On 20；
Water filling in B2, the ballast tank of inner layer floating drum 5, the slow sinking under gravity of internal layer floating drum 5, until internal layer floating drum
Four limit body B7 on 5 are in contact with four limit body A4 on outer layer floating drum 1 respectively；Continue the ballast tank of inner layer floating drum 5
Design flow is filled to, its gravity G when the ballast water of the design flow causes that internal layer floating drum 5 submerges in water completely1Still greater than buoyancy F1,
Outer layer floating drum 1 sinks down into stopping slowly together under the towing of internal layer floating drum 5 with internal layer floating drum 5 in the process, combines floating drum
15 float on sea 20；
Design flow is filled in B3, the ballast tank of outer layers floating drum 1, the ballast water of the design flow causes that outer layer floating drum 1 is complete
Its buoyancy F when submerging in water2More than its gravity G2, outer layer floating drum 1 is floating with internal layer under the towing of internal layer floating drum 5 in the process
Cylinder 5 sinks in outer layer floating drum 1 submerges water completely slowly together；
B4, when combining floating drum 15 and submerging completely in water, the stress of in the vertical direction is：Outer layer floating drum 1 it is floating
Power F2More than its gravity G2, the gravity G of internal layer floating drum 51More than its buoyancy F1, and internal layer floating drum 5 net buoyancy G1-F1More than outer layer
The net buoyancy F of floating drum 12-G2, i.e.,：G1-F1>F2-G2；Under this stressing conditions, it is steady that internal layer floating drum 5 can pull outer layer floating drum 1
It is heavy to fix, and limit body B7 and limit body A4 is in close contact in sinking watching, and outer layer floating drum 1 does not have phase with internal layer floating drum 5
To motion；
C, the Underwater Navigation of combination floating drum 15 are installed
After combination floating drum 15 sinks down into target depth, the cantilever floating drum 2 of outer layer floating drum 1 connects with corresponding mooring gear 14
Connect, be positioned at sea bed 21；Outer layer floating drum 1 is filled with nitrogen, and outer layer floating drum 1 floats, and is tensioned mooring cable；In the process, it is spacing
Body A4 and limit body B7 interacts, and internal layer floating drum 5 floats jointly in the presence of the limit body A4 of outer layer floating drum 1；
The installation under water of D, rigid production riser 41 and rigid protective pipe 40
The rigid production riser 41 of D1, one by one installation：Rigid production riser 41 is lifted by dry type production platform 25, makes rigidity
The bottom of production riser 41 is connected by the standpipe passage 11 and well head globe valve 45 oral with submarine well 43 of corresponding internal layer floating drum 5
Connect, the rigid top of production riser 41 is connected with the top of internal layer floating drum 5；
D2, first the hypomere umbilical of Flexible Control umbilical 30 is arranged in rigid protective pipe 40 by umbilical joint, then led to
The lifting rigid protective of dry type production platform 25 pipe 40 is crossed, makes the bottom of rigid protective pipe 40 by the standpipe of corresponding internal layer floating drum 5
Passage 11 and control module B47 are connected with rigid protective pedestal tube 44, the connection of the top of top and internal layer floating drum 5；
Nitrogen injection in D3, inner layer floating drum 5, makes internal layer floating drum 5 be floated along slideway 3, while being tensioned rigid production riser
41 and rigid protective pipe 40, internal layer floating drum 5 is contour with the center of outer layer floating drum 1 floating to design attitude, i.e. internal layer floating drum 5, spacing
1 to 2 meter of spacing is left between body B7 and limit body A4；
The installation under water of E, flexible production standpipe 31 and Flexible Control umbilical 30
E1, flexible production standpipe 31 is lifted by dry type production platform 25, make the bottom of flexible production standpipe 31 raw with rigidity
The connection of the top of standpipe 41, the top of flexible production standpipe 31 and the dry type tree 22 on the deck of dry type production platform 25 is produced to connect
Connect；
E2, Flexible Control umbilical 30 is lifted by dry type production platform 25, make the epimere umbilical bottom of Flexible Control umbilical 30
End be connected with the umbilical joint on the top of rigid protective pipe 40, epimere umbilical top and positioned at the deck of dry type production platform 25 control
Center 23 connects；
So far, a kind of production of integrated form under water conveying riser systems are installed.
During present invention maintenance, dry type tree 22 only supports the shaft mouth operation of production phase, corresponding dry type workover treatment
When carrying out must just Flexible Control umbilical 30 and flexible production standpipe 31 reclaim, then change rigid production riser 41, re-establish
The contact channel of internal layer floating drum 5 and dry type production platform 25.
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 (8)
1. one kind integrated form production under water conveys riser systems, it is characterised in that：Including production riser component, control standpipe group
Part, combination floating drum (15) and mooring gear (14)；
Described production riser component includes flexible production standpipe (31) with rigid production riser (41), described control standpipe group
Part includes rigid protective pipe (40) and Flexible Control umbilical (30), and described combination floating drum (15) includes outer layer floating drum (1) and interior
Layer floating drum (5)；Described internal layer floating drum (5) is nested in outer layer floating drum (1)；
Described outer layer floating drum (1) main body is ring cylinder structure, and outer layer floating drum (1) outer wall bottom margin connects four cantilever floating drums
(2), four cantilever floating drums (2) are evenly distributed, and radially, cantilever floating drum (2) end uses truss structure, truss structure
Outer end connects mooring cable, and outer layer floating drum (1) is by four mooring cable moorings on sea bed (21)；Outer layer floating drum (1) inwall edge
The vertical slideway (3) of circumference uniform distribution four, slideway (3) is through whole outer layer floating drum (1) inwall；Adjacent two vertical slideways (3) it
Between inwall center, at the pillar height of clearing from buoy bottom 1/3 set limit body A (4)；
Described internal layer floating drum (5) main body is cylindrical structure, and internal layer floating drum (5) outer wall is uniformly distributed along the circumference four vertical bossy bodies
(6), bossy body (6) width B1 is less than the width B of slideway (3), and bossy body (6) is contour with internal layer floating drum (5)；Described bossy body
(6) in the slideway (3) of outer layer floating drum (1)；Outer wall center between adjacent two bossy body (6), the post of clearing from buoy bottom 1/2
Eminence sets limit body B (7), and limit body B (7) is engaged with the limit body A (4) on outer layer floating drum (1), and limitation internal layer is floated
The relative vertical motion of cylinder (5) and outer layer floating drum (1)；
The top of described rigid production riser (41) through internal layer floating drum (5) standpipe passage (11), and with internal layer floating drum (5)
Top connects；The bottom of described rigid production riser (41) connects stress joint (42), the bottom connection of stress joint (42)
Subsea wellheads globe valve (45)；Described well head globe valve (45) (43) oral with submarine well is connected, and integrated control module A
(46)；Described well head globe valve (45) in working order under, with rigid production riser (41) UNICOM；In case of emergency rotate
90 degree, close the interface channel of rigid production riser (41) and submarine well oral (43)；Described flexible production standpipe (31)
Bottom is connected with rigid production riser (41) top, and the top of described flexible production standpipe (31) connects with dry type tree (22)
Connect；Described dry type tree (22) is on the deck of dry type production platform (25)；
The top of described rigid protective pipe (40) passes through the standpipe passage (11) of internal layer floating drum (5), and is pushed up with internal layer floating drum (5)
Portion connects；Described Flexible Control umbilical (30) is made up of epimere umbilical and hypomere umbilical, and described rigid protective pipe (40) is
Hypomere umbilical is provided to be installed and protection passage；Described rigid protective pipe (40) top sets umbilical joint, and epimere umbilical is with
Section umbilical is connected by umbilical joint；Described rigid protective pipe (40) bottom is connected with stress joint (42), stress joint
(42) bottom is connected with control module B (47), and the bottom of control module B (47) is fixed on rigid protective pedestal tube (44)；
Described Flexible Control umbilical (30) carries out down-hole pressure and temperature information collection, control for controlling underground chemical reagent to inject
The closure of storm valve processed and the closure of control well head globe valve (45)；The top of described Flexible Control umbilical (30) with
Control centre (23) connection, its bottom are connected through rigid protective pipe (40) with control module B (47)；Described control centre
(23) on the deck of dry type production platform (25)；
Described outer layer floating drum (1) is connected with mooring gear (14)；
It is connected by fly line (48) between described control module A (46) and control module B (47), described fly line (48) is letter
Number cable.
2. a kind of production of integrated form under water according to claim 1 conveys riser systems, it is characterised in that：Described control
One group of group of correspondence production riser component two to four of riser assemblies.
3. a kind of production of integrated form under water according to claim 1 conveys riser systems, it is characterised in that：Described combination
Floating drum (15) floating drum is immersed in 30~200m depths under sea (20).
4. a kind of production of integrated form under water according to claim 1 conveys riser systems, it is characterised in that：Described protrusion
Body (6) front is provided with two drum apparatus, and two trisections positioned at bossy body (6) front side long are highly located respectively, described
Drum apparatus be made up of roller (8), rotating shaft (9) and bearing (10), rotating shaft (9) axis is perpendicular to bossy body (6) side, bearing
(10) length width B1 positive with bossy body (6) is equal, and roller (8) is by rotating shaft (9) on bearing (10)；Roller
(8) it is in rolling contact with slideway (3) bottom surface.
5. a kind of production of integrated form under water according to claim 1 conveys riser systems, it is characterised in that：Described cantilever
Floating drum (2) is square-section cantilever floating drum.
6. a kind of production of integrated form under water according to claim 1 conveys riser systems, it is characterised in that：Described slideway
(3) cross section is square-section；The cross section of described bossy body (6) is square-section.
7. a kind of production of integrated form under water according to claim 1 conveys riser systems, it is characterised in that：Described is spacing
Body A (4) is cuboid, has 4, circumferential uniform along outer layer floating drum (1) inwall, and is in outer layer floating drum (1) same height of inwall
At degree；Described limit body B (7) is cuboid, has 4, circumferential uniform along internal layer floating drum (5) outer wall, and it is floating to be in internal layer
At cylinder (5) outer wall sustained height；When the center grade height of internal layer floating drum (5) and outer layer floating drum (1), limit body B (7) and limit body
1 to 2 meter of spacing is left between A (4).
8. a kind of production of integrated form under water conveys the installation method of riser systems, it is characterised in that：Comprise the following steps：
A, preparation work：
Outer layer floating drum (1) lifting is placed on semi-submerged ship main deck, then internal layer floating drum (5) is hung to directly over outer layer floating drum (1),
The position of adjustment internal layer floating drum (5) and angle, until four bossy bodies (6) of internal layer floating drum (5) are respectively aligned to outer layer floating drum (1)
Four slideways (3), by internal layer floating drum (5) decentralization among outer layer floating drum (1), constitute combination floating drum (15)；
B, the in place and sinking of combination floating drum (15)：
B1, using semi-submerged ship will combine floating drum (15) tow to infield, each workboat is in place；Connect on outer layer floating drum (1)
The hawser and anchor chain of conventional installation exercise method are connect, semi-submerged ship pressurization is carried and sink under water and open from combination floating drum (15) floats over sea
On face (20)；
Water filling in B2, inner layer floating drum (5) ballast tank, internal layer floating drum (5) slow sinking under gravity, until internal layer floating drum
(5) four limit body B (7) on are in contact with four limit body A (4) on outer layer floating drum (1) respectively；Continue inner layer floating drum
(5) ballast tank is filled to design flow, its gravity G when the ballast water of the design flow causes that internal layer floating drum (5) submerges in water completely1Still
More than buoyancy F1, in the process outer layer floating drum (1) under the towing of internal layer floating drum (5) with internal layer floating drum (5) slowly together under
Stopping is sink to, combination floating drum (15) is floated on sea (20)；
Design flow is filled in B3, outer layers floating drum (1) ballast tank, the ballast water of the design flow causes outer layer floating drum (1) completely
Its buoyancy F when submerging in water2More than its gravity G2, in the process outer layer floating drum (1) under the towing of internal layer floating drum (5) with interior
Layer floating drum (5) sinks in outer layer floating drum (1) submerges water completely slowly together；
B4, when combining floating drum (15) and submerging completely in water, the stress of in the vertical direction is：Outer layer floating drum (1) it is floating
Power F2More than its gravity G2, the gravity G of internal layer floating drum (5)1More than its buoyancy F1, and internal layer floating drum (5) net buoyancy G1-F1It is more than
The net buoyancy F of outer layer floating drum (1)2-G2, i.e.,：(G1-F1)>(F2-G2)；Under this stressing conditions, internal layer floating drum (5) can be dragged
Outer layer floating drum (1) stabilization is draged to sink, and limit body B (7) and limit body A (4) is in close contact in sinking watching, outer layer floating drum
(1) relative motion is not had with internal layer floating drum (5)；
C, the Underwater Navigation of combination floating drum (15) are installed
After combination floating drum (15) sinks down into target depth, cantilever floating drum (2) and corresponding mooring gear (14) of outer layer floating drum (1)
Connection, is positioned at sea bed (21)；Outer layer floating drum (1) is filled with nitrogen, and outer layer floating drum (1) floats, and is tensioned mooring cable；In this process
In, limit body A (4) and limit body B (7) interacts, and internal layer floating drum (5) is in the presence of outer layer floating drum (1) limit body A (4)
It is common to float；
The installation under water of D, rigid production riser (41) and rigid protective pipe (40)
The rigid production riser (41) of D1, one by one installation：Rigid production riser (41) is lifted by dry type production platform (25), is made just
Property production riser (41) bottom by the standpipe passage (11) and well head globe valve (45) and submarine well of corresponding internal layer floating drum (5)
Oral (43) connection, rigid production riser (41) top are connected with the top of internal layer floating drum (5)；
D2, first the hypomere umbilical of Flexible Control umbilical (30) is arranged in rigid protective pipe (40) by umbilical joint, then led to
Cross dry type production platform (25) and lift rigid protective pipe (40), the bottom of rigid protective pipe (40) is passed through corresponding internal layer floating drum
(5) standpipe passage (11) and control module B (47) is connected with rigid protective pedestal tube (44), top and internal layer floating drum (5)
Top connects；
D3, inner layer floating drum (5) interior nitrogen injection, make internal layer floating drum (5) be floated along slideway (3), while it is vertical to be tensioned rigidity production
Pipe (41) and rigid protective pipe (40), internal layer floating drum (5) is floating in design attitude, i.e. internal layer floating drum (5) and outer layer floating drum (1)
The heart is contour, and 1 to 2 meter of spacing is left between limit body B (7) and limit body A (4)；
The installation under water of E, flexible production standpipe (31) and Flexible Control umbilical (30)
E1, by dry type production platform (25) lift flexible production standpipe (31), make flexible production standpipe (31) bottom and rigidity
The connection of production riser (41) top, flexible production standpipe (31) top and the dry type on dry type production platform (25) deck are adopted
Oil tree (22) connection；
E2, by dry type production platform (25) lift Flexible Control umbilical (30), make the epimere umbilical of Flexible Control umbilical (30)
Bottom is connected with the umbilical joint on rigid protective pipe (40) top, epimere umbilical top be located at dry type production platform (25) deck
Control centre (23) connection；
So far, a kind of production of integrated form under water conveying riser systems are installed.
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| CN106697208B (en) | 2018-05-04 |
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