CN105675255B - A kind of platform marine riser couples pond experimental system for simulating - Google Patents
A kind of platform marine riser couples pond experimental system for simulating Download PDFInfo
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- CN105675255B CN105675255B CN201610104668.XA CN201610104668A CN105675255B CN 105675255 B CN105675255 B CN 105675255B CN 201610104668 A CN201610104668 A CN 201610104668A CN 105675255 B CN105675255 B CN 105675255B
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- marine riser
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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Abstract
The present invention relates to a kind of platform marine riser to couple pond experimental system for simulating, it is characterised in that：It is fastenedly connected the hold-down support in pond deep-well bottom including a fixed mount being crossed on platform moon pool and one, a centrally disposed through hole for hold-down support, cell body is offered at the top of hold-down support；In the head clearance of fixed mount, two fixed pulleys are set, one first connector is fastenedly connected on the fixed mount between two fixed pulleys, the end of first connector connects the upper end of a marine riser by one first body, marine riser is connected close to the one end of the both sides of the part of upper end respectively with a rope body, and the other end of each rope body through a fixed pulley and is fastenedly connected a solids；One height adjustment frame is set in the cell body of hold-down support, in the top center of height adjustment frame, one perforation ball is set, one second connector is set in the through hole of hold-down support, second connector is fastenedly connected in pond deep-well bottom, one end of one second body is connected in the end of the second connector, the other end of the second body is connected after passing through ball of perforating by one the 3rd connector with the lower end of the marine riser.
Description
Technical field
The present invention relates to a kind of experimental system for simulating, and pond simulated experiment system is coupled especially with regard to a kind of platform marine riser
System.
Background technology
In the prior art, marine riser is the essential engineer equipment of drilling platforms operation on the sea.Drillng operation after
Water pipe connects subsea blow out preventer and floating platform, for completely cutting off seawater, importing drilling tool and sleeve pipe and forming the logical of mud circulation
Road.Deep water riser belongs to the flexible member of big L/D ratio, will be born in deepwater work large-scale fluid-load and by
The influence of upper end floating platform motion, it can not be ignored for floating platform motion and the effect of underwater well head, be this industry
Boundary has carried out a large amount of numerical simulation and experiments for floating platform marine riser Coupled Dynamics mechanism and studied, to rest in
The mechanical characteristic of floating platform marine riser coupled system under extreme environmental conditions, should from control riser top stroke and bending
Power, marine riser is reduced to the angle of underwater well head active force to its top pretension size proposition engineering advice, so that it is determined that every
The environmental load window of water pipe operation and recovery.
In experimental study field, it is to ensure experimental result tool to establish rational platform-mooring cable-marine riser coupling model
There is the key point of authenticity.But its difficult point is：(1) external fluid to marine riser mechanical characteristic itself and suffered by it
The simulation of load.Although marine riser external diameter, length, Mass Distribution, axial direction and bending stiffness can be according to scaling factors according to several
What similar method is handled, but it is difficult some in terms of the simulation of outside fluid-load to be still present.Due to marine riser
The external fluid load being subject to is based on viscous drag force, but because fluid media (medium) is water in tank experiments, Reynolds number without
Method is consistent, therefore the external fluid load point to marine riser mechanical characteristic itself and suffered by it is needed in tank experiments
Analog form that Cai Yong be not different.(2) marine riser is connected and the place of subsea wellheads edge-restraint condition with top floating platform
Reason.Because riser top is connected by flexible coupling with telescopic joint, therefore release the freedom of riser top heave movement
Degree, marine riser is suspended on floating platform hull by stretcher in addition, and stretcher can be according to floating platform change in displacement
Its axial rigidity is adjusted, so that riser top is acted on by a constant force substantially.Water proof bottom of the tube and subsea blow out preventer,
Well head etc. forms a complete tubular column system, and tubular column system is sent out in the presence of the load such as wave, ocean current, floating platform skew
Raw transversely deforming, now seabed soil will have to well head supports and anti-rotation effect.In summary, experimental system must be to water proof
Reasonably simulated with floating platform, water proof bottom of the tube and the connected mode at well head in tube top portion.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to provide a kind of mechanical characteristic that can simulate marine riser coupled system and
Easy to operate platform marine riser coupling pond experimental system for simulating.
To achieve the above object, the present invention takes following technical scheme：A kind of platform marine riser couples pond simulated experiment
System, it is characterised in that：It is fastenedly connected in pond deep-well bottom including a fixed mount being crossed on platform moon pool and one
Hold-down support, the hold-down support are provided centrally with a through hole, cell body are offered at the top of the hold-down support；Described
The head clearance of fixed mount is provided with two fixed pulleys, and one is fastenedly connected on the fixed mount between two fixed pulleys
First connector, the end of first connector pass through moon pool and vertically arranged marine riser by one first body connection one
Upper end, the marine riser close to the both sides of the part of upper end respectively with one rope body one end be connected, it is each it is described restrict body it is another
One end is through a fixed pulley and is fastenedly connected a solids；A height is provided with the cell body at the top of the hold-down support
Adjustment frame, the top center of the height adjustment frame is provided with a perforation ball, set in the through hole of the hold-down support
One second connector is equipped with, second connector is fastenedly connected in pond deep-well bottom, in the end of second connector
Connect one end of one second body, the other end of second body is through passing through one the 3rd connector and institute after the perforation ball
State the lower end connection of marine riser.
Two exhausting holes are symmetrically arranged with the height adjustment frame, wherein one through hole in through hole described in every row
In plug a latch, the both ends of the latch are stuck in the top of cell body described in the hold-down support.
The marine riser includes a metal tube, and a foam layer and one is disposed with the outside of the metal tube and is prevented
Water film.
Three foil gauges are arranged at intervals with the marine riser；First, second, and third connector is respectively ten thousand
To articulated joint or flexural pivot.
One or three component instrument are provided with second body；First body and second body are metal
Pipe.
One bracket is set close to the part of upper end in the marine riser, two hooks are relatively set with the bracket, often
One end of the one rope body is fastenedly connected wherein on a hook.
For the present invention due to taking above technical scheme, it has advantages below：1st, the present invention is provided with a marine riser, water proof
Pipe close to upper end part both sides respectively with one rope body one end be connected, it is each rope body the other end through a fixed pulley and tightly
Be solidly connected a solids so that the lifting power of riser top of the present invention influenceed by platform motion it is smaller, it is solid by changing two
The quality of body thing, the adjustment to riser top tensile force can be realized.2nd, the present invention is due to there is provided a height adjustment frame,
The top center of height adjustment frame is provided with a perforation ball, is worn in perforation ball on one second body, the top of the second body
Connected by the lower end of a connector and marine riser, it is firm to the anti-rotation of water proof bottom of the tube that the present invention can simulate pond deep-well bottom
Size is spent, so as to the soil condition of simulated sea bottom diverse location.3rd, the connection of the top of marine riser of the present invention and platform, marine riser
Bottom and the connection at the deep-well mouth of pond, the coupled model of platform and marine riser can be realized.4th, the present invention is on marine riser
Three foil gauges are arranged at intervals with, by suffered by the diverse location being sized on detection marine riser of deformation on each foil gauge
The size of liquid force.5th, the present invention is provided with one or three component instrument on the second body, for by the axial direction on the second body
Power is decomposed into the active force along tri- directions of X, Y and Z, serve transmission, load sharing body axial force effect.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention
Fig. 2 is the schematic top plan view of the present invention
Fig. 3 is Fig. 1 A-A to schematic top plan view
Fig. 4 is the schematic cross-sectional view of the cross section of marine riser of the present invention
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1 and Figure 2, the present invention proposes a kind of platform marine riser coupling pond experimental system for simulating, and it includes one
The fixed mount 2 and one being crossed on platform moon pool 1 is fastenedly connected the hold-down support 3 in pond deep-well bottom.Wherein, hold-down support
3 are provided centrally with a through hole 31, and the top of hold-down support 3 offers cell body (not shown).Between the top of fixed mount 2
Every being provided with two fixed pulleys 4, a connector 5 is fastenedly connected on the fixed mount 2 between two fixed pulleys 4.The end of connector 5
Portion passes through the upper end of moon pool 1 and vertically arranged marine riser 7 by a body 6 connection one.Marine riser 7 is close to the part of upper end
The one end of both sides respectively with a rope body 8 is connected, and the other end of each rope body 8 through a fixed pulley 4 and is fastenedly connected a solids
9, the weight by changing solids 9 can realize the adjustment to the top-tensioned power of marine riser 7.Groove at the top of hold-down support 3
A height adjustment frame 10 is provided with vivo, wherein, height adjustment frame 10 is to adjust relative to the height of pond deep-well bottom
's.The top center of height adjustment frame 10 is provided with a perforation ball 11, pond deep-well bottom can be simulated to the bottom of marine riser 7
Anti-rotation rigidity size, so as to simulated sea bottom diverse location soil condition.A company is provided with the through hole 31 of hold-down support 3
Device 12 is connect, connector 12 is fastenedly connected in pond deep-well bottom.One end of a body 13, body are connected in the end of connector 12
13 other end is connected after passing through perforation ball 11 by a connector 14 with the lower end of marine riser 7.
In above-described embodiment, as shown in Figure 1, Figure 3, two exhausting holes 101 are symmetrically arranged with height adjustment frame 10, every
A latch 102 is plugged in a wherein through hole 101 in exhausting hole 101, the both ends of latch 102 are stuck in the top of the cell body of hold-down support 3
Portion, by the way that two latches 102 are plugged in into two exhausting holes, 101 corresponding diverse location to realize height adjustment frame 10 relative to pond
The height change of deep-well bottom.
In above-described embodiment, as shown in figure 4, marine riser 7 includes a metal tube 71, for providing equivalent marine riser 7
Quality and bending stiffness.A foam layer 72 and a waterproofing membrane 73 are disposed with the outer wall of metal tube 71, wherein,
Foam layer 72 is used to make marine riser 7 bear equivalent fluid-load, and waterproofing membrane 73 is used to prevent external fluid from entering gold
Belong to pipe 71.
In above-described embodiment, as shown in figure 1, three foil gauges 15 can be arranged at intervals with marine riser 7, by each
The size of liquid force suffered by diverse location on the size detection marine riser 7 of deformation on foil gauge 15.
In above-described embodiment, as shown in figure 1, one or three component instrument 131 are provided with body 13, for by body 13
Axial force is decomposed into the active force (Z-direction is the axial direction of body 13) along tri- directions of X, Y and Z, can play transmission, load sharing pipe
The effect of the axial force of body 13.
In above-described embodiment, as shown in figure 1, a bracket 16 can be set close to the part of upper end in marine riser 7, in bracket
Two hooks 161 are relatively set with 16, one end of each rope body 8 is fastenedly connected wherein on a hook 161.
In above-described embodiment, body 6 and body 13 are metal tube.
In above-described embodiment, as shown in figure 1, connector 5,12,14 can be universal hinging head or flexural pivot.
In the use of the present invention, it comprises the following steps：
(1) determination of marine riser 7.
Length, diameter and the wall thickness of the metal tube 71 of marine riser 7 are determined according to geometrical similarity principle and scaling factor first so that
Marine riser 7 is with prototype in Mass Distribution with being consistent in bending stiffness.It is equal according to Reynolds number, the external diameter of marine riser 7 is determined,
It is wrapped in using foamed plastics 72 on the outer wall of metal tube 71, is then wrapped up and sealed using waterproofing membrane 73.
Geometrical similarity principle：
Reynolds number equation equal principle：
ρmVmDm/ηm=ρsVsDs/ηs
Wherein, subscript s represents prototype value, and subscript m represents model value, and L is characterized length and (represents marine riser 7, metal tube 71
Length), A is sectional area, and λ is scaling factor, and V is characterized speed, and D is characterized diameter, and ρ is fluid density, and η is fluid viscosity.
(2) experimental system for simulating is installed.
First in pond deep-well bottom installs connector 12, and body 13 and connector 14 are attached, then will be solid
Determine the outside that bearing 3 is fixed on connector 12, the height adjustment frame 10 with perforation ball 11 is then arranged on hold-down support 3
On.The determination method of the moment of flexure of height adjustment frame 10 can be determined according to the calculating of freely-supported beam end moment of flexure, specific as follows：
L=6EI/K
Wherein, l is the distance at center extremely perforation ball 11 center of connector 12, and E is the modulus of elasticity of body 13, and I is pipe
For body 13 relative to the moment of inertia of its own axis, K is the pond bottom of pond soil anti-rotation rigidity for needing to simulate.
The top of body 13 and the lower end of marine riser 7 are attached by connector 14, are pacified afterwards in the upper end of marine riser 7
Fill the hook of bracket 16 and two 161.
Mounting and fixing support 2, two fixed pulleys 4 and connector 5 on the moon pool of platform, body 6 is connected with connector 5, it
Reduce platform afterwards and absorb water the top for causing body 6 to insert marine riser 7, finally make each rope body 8 through a fixed pulley 4 and a hook
161 are connected, and the other end of rope body 8 is connected with solids 9.
(3) design environmental conditions, model test is carried out.
According to Fu, your moral number is equal with Strouhal number equal principle design environmental conditions, and sector-style of going forward side by side wave stream environment carries
The application of lotus and marine riser stress, the DATA REASONING of strain.
Fu Rude numbers are equal：
Strouhal number is equal：
VmTm/Lm=VsTs/Ls
Wherein, subscript s represents prototype value, and subscript m represents model value, and L is characterized length, and T is characterized the cycle, and V is characterized
Speed.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each part, connected mode etc. are all can be
Change, every equivalents carried out on the basis of technical solution of the present invention and improvement, it should not exclude the present invention's
Outside protection domain.
Claims (10)
1. a kind of platform marine riser couples pond experimental system for simulating, it includes a fixed mount and one being crossed on platform moon pool
The hold-down support in pond deep-well bottom is fastenedly connected, the hold-down support is provided centrally with a through hole, it is characterised in that：
Cell body is offered at the top of the hold-down support；
The head clearance of the fixed mount is provided with two fixed pulleys, on the fixed mount between two fixed pulleys
One first connector is fastenedly connected, the end of first connector passes through moon pool and vertical cloth by one first body connection one
The upper end for the marine riser put, the marine riser are connected close to the one end of the both sides of the part of upper end respectively with a rope body, Mei Yisuo
The other end of rope body is stated through a fixed pulley and is fastenedly connected a solids；Set in the cell body at the top of the hold-down support
A height adjustment frame is equipped with, the top center of the height adjustment frame is provided with a perforation ball, in the institute of the hold-down support
State and one second connector is provided with through hole, second connector is fastenedly connected in pond deep-well bottom, is connected described second
The end for connecing device connects one end of one second body, and the other end of second body is through passing through one the 3rd after the perforation ball
Connector is connected with the lower end of the marine riser.
A kind of 2. platform marine riser coupling pond experimental system for simulating as claimed in claim 1, it is characterised in that：In the height
Two exhausting holes are symmetrically arranged with degree adjustment frame, a latch, institute are plugged in wherein one through hole in through hole described in every row
The both ends for stating latch are stuck in the top of cell body described in the hold-down support.
A kind of 3. platform marine riser coupling pond experimental system for simulating as claimed in claim 1, it is characterised in that：The water proof
Pipe includes a metal tube, and a foam layer and a waterproofing membrane are disposed with the outside of the metal tube.
A kind of 4. platform marine riser coupling pond experimental system for simulating as claimed in claim 2, it is characterised in that：The water proof
Pipe includes a metal tube, and a foam layer and a waterproofing membrane are disposed with the outside of the metal tube.
5. a kind of platform marine riser coupling pond experimental system for simulating as claimed in claim 1 or 2 or 3 or 4, its feature exist
In：Three foil gauges are arranged at intervals with the marine riser；First, second, and third connector is respectively universal hinging
Head or flexural pivot.
6. a kind of platform marine riser coupling pond experimental system for simulating as claimed in claim 1 or 2 or 3 or 4, its feature exist
In：One or three component instrument are provided with second body；First body and second body are metal tube.
A kind of 7. platform marine riser coupling pond experimental system for simulating as claimed in claim 5, it is characterised in that：Described
One or three component instrument are provided with two bodys；First body and second body are metal tube.
8. a kind of platform marine riser coupling pond experimental system for simulating as described in claim 1 or 2 or 3 or 4 or 7, its feature
It is：One bracket is set close to the part of upper end in the marine riser, two hooks, Mei Yisuo are relatively set with the bracket
The one end for stating rope body is fastenedly connected wherein on a hook.
A kind of 9. platform marine riser coupling pond experimental system for simulating as claimed in claim 5, it is characterised in that：It is described every
Water pipe sets a bracket close to the part of upper end, and two hooks, one end of each rope body are relatively set with the bracket
It is fastenedly connected wherein on a hook.
A kind of 10. platform marine riser coupling pond experimental system for simulating as claimed in claim 6, it is characterised in that：Described
Marine riser sets a bracket close to the part of upper end, is relatively set with two hooks on the bracket, and the one of each rope body
End is fastenedly connected wherein on a hook.
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| CN201610104668.XA CN105675255B (en) | 2016-02-25 | 2016-02-25 | A kind of platform marine riser couples pond experimental system for simulating |
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| CN201610104668.XA CN105675255B (en) | 2016-02-25 | 2016-02-25 | A kind of platform marine riser couples pond experimental system for simulating |
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| CN105675255B true CN105675255B (en) | 2017-12-26 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107907313A (en) * | 2017-09-25 | 2018-04-13 | 西南石油大学 | A kind of device that the stress of marine riser when deep sea drilling platform keeps away platform is simulated using resistance strain gauge |
| CN111982461B (en) * | 2019-05-23 | 2022-02-08 | 中国石油大学(华东) | Ocean oil gas tubular column rigid body fluid-solid coupling semi-physical simulation test device |
| CN110186645B (en) * | 2019-06-17 | 2020-12-01 | 中国海洋石油集团有限公司 | Test device for testing load of buoy region of deepwater anti-bench drilling marine riser |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8074720B2 (en) * | 2004-09-28 | 2011-12-13 | Vetco Gray Inc. | Riser lifecycle management system, program product, and related methods |
| CN202338231U (en) * | 2011-11-21 | 2012-07-18 | 宝鸡石油机械有限责任公司 | Steel wire rope type riser tensioner device |
| CN102518397B (en) * | 2011-12-24 | 2013-12-25 | 大连理工大学 | Tension mooring type underwater drilling system and mounting method for same |
| GB2501094A (en) * | 2012-04-11 | 2013-10-16 | Managed Pressure Operations | Method of handling a gas influx in a riser |
| US10168253B2 (en) * | 2014-05-30 | 2019-01-01 | General Electric Company | Marine riser management system including subsea acoustic monitoring platform and an associated method |
| CN104266854B (en) * | 2014-08-08 | 2015-09-23 | 西南石油大学 | A kind of based on the marine riser mechanical behavior pilot system under marine environment and drilling condition coupling and test method thereof |
| CN104613927A (en) * | 2015-02-15 | 2015-05-13 | 中国海洋石油总公司 | Method for monitoring rotating angle of deep marine riser |
| CN105136598B (en) * | 2015-08-04 | 2018-03-30 | 西南石油大学 | A kind of Deep Water Drilling Riser and drill string wear simulation test device and test method |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation |
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