CN117022596A - Deepwater floater based on S-Lay installation technology - Google Patents
Deepwater floater based on S-Lay installation technology Download PDFInfo
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- CN117022596A CN117022596A CN202310941734.9A CN202310941734A CN117022596A CN 117022596 A CN117022596 A CN 117022596A CN 202310941734 A CN202310941734 A CN 202310941734A CN 117022596 A CN117022596 A CN 117022596A
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- float
- clip
- floater
- float body
- deepwater
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- 238000009434 installation Methods 0.000 title abstract description 10
- 238000005516 engineering process Methods 0.000 title description 14
- 230000001629 suppression Effects 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000011900 installation process Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 description 5
- 238000007667 floating Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Revetment (AREA)
Abstract
The invention discloses a deepwater float based on an S-Lay mounting process, which comprises a float body and a clip, wherein the float body is a semicircular shell body hinged together, the float body is in an eccentric cylinder shape as a whole, the geometric center of the float body is biased to the bottom of the float body, the bottom section of the float body is trapezoid, the back of the float body is provided with a hanging point, the outer surface of the float body is fixedly provided with a spiral strake vortex-induced vibration suppression device, the inside of the float body is provided with an annular groove, the clip is in a multi-section hinged annular shape as a whole, one hinge point can be opened, and when the float body is in a closed state, the clip is embedded in the groove; when the device is used, the clamp is opened to clamp the vertical pipe, then the clamp is placed in the groove, then the float body is folded, and finally the whole device is placed on an S-Lay pipe laying ship working line for installation.
Description
Technical Field
The invention relates to the technical field of ocean engineering, in particular to a deepwater floater based on an S-Lay installation process.
Background
With the continuous development of offshore oil development, the exploitation of the offshore oil gradually goes from deep water to ultra-deep water, deep water and ultra-deep water floating production platforms become key offshore equipment, and the installation of deep water risers matched with the deep water equipment also becomes a technology to be overcome. A floating production platform under deep water environment conditions, particularly a turret moored floating production, storage and offloading (FPSO) system or a semi-submersible platform, has a larger amplitude of hull movement than other shallow water platform equipment, is easy to flex due to mud-adhering points (TDPs) of conventional Steel Catenary Risers (SCR) arranged on the platform, and has larger fatigue damage and shorter service life. At the same time, due to the increase of the water depth, a longer suspension length and a thicker pipe wall are required, resulting in a great increase of the load on the floating platform. The design of conventional SCR's presents a number of challenges in ultra-deep water applications. Among the many deep water risers, a slow Wave Steel catenary Riser (SLWR) has received more and more attention in recent years, and is one of the more common forms of deep water risers at present, and has been adopted by several ultra-deep water oilfield development projects. The riser form is characterized by having a float section hundreds of meters long, the float section region providing a degree of buoyancy such that the riser in this region forms an upwardly arched section. The float section area can effectively isolate dynamic response of TDP and suspension points, and relieve coupling effect of floating platform motion to the TDP of the vertical pipe, so that fatigue life of the vertical pipe is prolonged, and top tension of the deepwater vertical pipe can be effectively reduced.
Because of the presence of the float section, most risers of this type are installed in either the Reel-Lay or J-Lay process, and most of the internationally installed service SLWRs also use both processes. However, in special cases, such as the lack of Reel-Lay or J-Lay technology to install the ship resources or technology, the installation also needs to be performed with the S-Lay technology. The float section belongs to an on-line structure, if the S-Lay technology is used for installation, the difficulty is high, the strength and the appearance design of the float are required to meet the requirements of the S-Lay technology, however, no deep water float specially aiming at the S-Lay installation technology exists at present.
Disclosure of Invention
The present invention aims to solve the above technical problems to a certain extent.
In order to solve the technical problems, the invention provides the deepwater floater based on the S-Lay installation process, which can smoothly and safely pass through the idler wheels of the S-Lay pipe-laying ship to realize quick and safe installation.
The deepwater floater is characterized by comprising a floater body and a clip, wherein the floater body is two semicircular shells hinged together, the whole floater body is in an eccentric cylinder shape, the geometric center of the floater body is biased to the bottom of the floater body, the bottom section of the floater body is trapezoid, the back of the floater body is provided with a hanging point, the outer surface of the floater body is fixedly provided with a spiral strake vortex-induced vibration suppression device, the inside of the floater body is provided with an annular groove, the whole clip is in a multi-section hinged ring shape, one hinge point can be opened, and when the floater body is in a closed state, the clip is embedded in the groove; when the float is used, the clip is opened to clamp the vertical pipe, then the clip is placed in the groove, and then the float body is folded.
Further, the clip comprises three sections of shells which are hinged together and are in a circular arc shape, wherein one part of each shell is provided with a bolt and a nut, and a high friction gasket is attached to the inside of the clip.
Further, a binding groove for installing the packing belt is arranged outside the float body.
Further, the upper half part of the float body is made of a material with high buoyancy, and the lower half part of the float body is made of a material with high resistance to pressure.
Further, the outside of the bottom of the float body is symmetrically provided with a force application device, and a constructor can grasp the force application device by hand to open the float outwards when installing on a working line.
Further, the top of the float body is provided with a positioning protrusion, correspondingly, the outer ring of the clip is provided with a positioning groove matched with the positioning protrusion, and the inner ring of the clip is correspondingly provided with a rigging groove.
The invention has the beneficial effects that: the invention provides a deepwater float based on an S-Lay mounting process, which comprises a float body and a clip, wherein the float body is a semicircular shell body hinged together, the float body is in an eccentric cylinder shape as a whole, the geometric center of the float body is biased to the bottom of the float body, the bottom section of the float body is trapezoid, the back of the float body is provided with a hanging point, the outer surface of the float body is fixedly provided with a spiral strake vortex-induced vibration suppression device, the inside of the float body is provided with an annular groove, the clip is in a multi-section hinged annular shape as a whole, one hinge point can be opened, and when the float body is in a closed state, the clip is embedded in the groove; when the float is used, the clip is opened to clamp the vertical pipe, then the clip is placed in the groove, and then the float body is folded. The eccentric design mode of the float body is adopted, the bottom section of the float body is trapezoidal, the contact between the idler wheels on the S-Lay pipe laying ship and the float body is surface contact, the load of the idler wheels on the float can be effectively reduced, and the risk that other structures are blocked by the float can be reduced. The floater is fixed on the vertical pipe through the clip, the clip restrains the floater to move transversely and longitudinally, and the relative stability of the floater on the vertical pipe is ensured.
Drawings
FIG. 1 is a three-dimensional view showing the overall appearance of the working state of a deepwater float based on an S-Lay installation process;
FIG. 2 is a schematic view of the invention in a state of hoisting open of a deepwater buoy based on an S-Lay installation process;
FIG. 3 is a front view of a deepwater float based on an S-Lay installation process of the present invention;
FIG. 4 is a schematic illustration of a deepwater float on an S-Lay pipelaying vessel roller based on an S-Lay installation process of the present invention;
FIG. 5 is a schematic three-dimensional view of a clip of a deepwater float based on an S-Lay installation process of the present invention;
FIG. 6 is a schematic view of the invention in a clip-on condition of a deepwater float based on an S-Lay installation process;
in the figure, 1-float body; 2-a vertical pipe; 3-rolling wheels; 4-spiral strake vortex-induced vibration suppression device; 5-clip; 6-force application device; 7-hanging points; 8-bottom section; 9-friction pads; 10-hinges; 11-positioning grooves; 12-a bolt nut; 13-a bundling slot; 14-rigging groove.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to limit the invention, so that those skilled in the art may better understand the invention and practice it.
According to the embodiment of the invention, the deepwater floater based on the S-Lay mounting technology comprises a floater body 1 and a clip 5, wherein the floater body 1 is a semicircular shell body hinged together, the floater body 1 is in an eccentric cylinder shape as a whole, the geometric center of the floater body 1 is biased to the bottom of the floater body 1, the section 8 of the bottom of the floater body 1 is trapezoid, the back of the floater body 1 is provided with a hanging point 7, the outer surface of the floater body 1 is fixedly provided with a spiral strake vortex-induced vibration suppression device 4, the inside of the floater body 1 is provided with an annular groove, the clip 5 is in a multi-section hinged annular shape as a whole, one hinge point can be opened, and when the floater body 1 is in a closed state, the clip 5 is embedded in the groove; when the novel vertical pipe laying device is used, the clamp 5 is opened to clamp the vertical pipe 2, the clamp 5 is placed in the groove, the float body 1 is folded, and finally the whole body is placed on an S-Lay pipe laying ship line for installation. The contact area between the bottom section 8 of the float body 1 and the roller 3 of the S-Lay pipe-laying ship is designed to be trapezoid instead of circular arc, and the design ensures that the floats are in surface contact with the working line and the roller 3 on the stinger instead of line contact, so that the contact area is increased, and the local stress is reduced. The geometrical center of the float body 1 is biased to the bottom of the float body 1, so that the action moment of the vertical pipe 2 and the idler wheel 3 of the S-Lay pipe-laying ship is reduced, the integral load of the idler wheel 3 of the S-Lay pipe-laying ship to the float is effectively reduced, and the risk that the float clamps other structures can be reduced. The float body 1 is fixed on the vertical pipe 2 through the clip 5, and the clip 5 is embedded in the groove of the float body 1, so that the transverse and longitudinal movement of the float body 1 is restrained, the relative stability of the float body 1 on the vertical pipe 2 is ensured, and meanwhile, the spiral strake vortex-induced vibration suppression device 4 (VIV strakes) is designed on the outer surface of the float, so that the requirements of vortex-induced vibration suppression of the deepwater vertical pipe can be met.
According to the deepwater floater based on the S-Lay mounting technology, as shown in fig. 1-6, a clip 5 comprises three sections of shells which are hinged together and are in a circular arc shape, wherein one part is hinged by using a bolt and a nut 12, the other two parts are hinged by using a hinge 10, and a friction pad 9 is attached to the inside of the clip 5. The clip 5 is a three-section hinged arc-shaped shell, the three-section design is adopted, the flexibility of the clip 5 is high, the main vertical pipe 2 is clamped by the clip 5, the bolt and the nut 12 are matched, and when the clip 5 is folded to lock the vertical pipe 2, the clip 5 is locked by the bolt and the nut, and the locking mode is reliable; the friction pad 9 is attached to the inside of the clamp 5, so that friction force between the clamp 5 and the vertical pipe 2 can be increased, abrasion of the clamp 5 can be reduced, and service life is prolonged.
According to the deepwater float based on the S-Lay mounting technology, as shown in fig. 1-6, the outside of the float body 1 is further provided with the binding belt grooves 13 for mounting the packing belt, in the embodiment, the binding belt grooves 13 are three, the packing belt can be mounted to firmly fold the float body 1, the clip 5 and the vertical pipe 2 are fixed, and meanwhile damage caused by hooking the packing belt to other structures on a production line can be avoided.
According to the deepwater float based on the S-Lay mounting technology, as shown in fig. 1-6, the upper half part of the float body 1 is made of a material with large buoyancy, and the lower half part of the float body 1 is made of a material with strong resistance pressure. According to the deepwater float based on the S-Lay installation process, as shown in fig. 1-6, the force application devices 6 are symmetrically arranged on the outer part of the bottom of the float body 1, and a constructor can grasp the force application devices 6 by hand and open the float outwards when the installation is performed on a working line. The force application device 6 in the embodiment is a concave handle arranged on a tangential plane of the bottom side surface of the float body 1, and when the float body needs to be opened, the handle can be directly pulled outwards by hands.
According to the deepwater float based on the S-Lay mounting technology, as shown in fig. 1-6, the top of the float body 1 is provided with a positioning protrusion, correspondingly, the outer ring of the clip 5 is provided with a positioning groove 11 matched with the positioning protrusion, and the inner ring of the clip 5 is correspondingly provided with a rigging groove 14. The positioning bulge is matched with the positioning groove 11, so that the rotation of the clamp 5 can be prevented, and the rigging groove 14 on the inner ring of the clamp 5 can facilitate the passage of a rigging and the subsequent lifting.
The above embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (6)
1. The deepwater floater is characterized by comprising a floater body and a clip, wherein the floater body is two semicircular shells hinged together, the whole floater body is in an eccentric cylinder shape, the geometric center of the floater body is biased to the bottom of the floater body, the bottom section of the floater body is trapezoid, the back of the floater body is provided with a hanging point, the outer surface of the floater body is fixedly provided with a spiral strake vortex-induced vibration suppression device, the inside of the floater body is provided with an annular groove, the whole clip is in a multi-section hinged ring shape, one hinge point can be opened, and when the floater body is in a closed state, the clip is embedded in the groove; when the float is used, the clip is opened to clamp the vertical pipe, then the clip is placed in the groove, and then the float body is folded.
2. The deepwater float based on the S-Lay installation process according to claim 1, wherein the clip comprises three sections of shells hinged together and shaped like a circular arc, one section of shells is provided with a bolt and a nut, and a high friction gasket is attached to the inner part of the clip.
3. The S-Lay installation process-based deep water float of claim 1, wherein the outside of the float body is further provided with a strapping slot for installing a strapping tape.
4. The deepwater float based on the S-Lay installation process according to claim 1, wherein the upper half of the float body is made of a material with high buoyancy, and the lower half of the float body is made of a material with high pressure resistance.
5. The deepwater float based on the S-Lay installation process according to claim 1, wherein the outer part of the bottom of the float body is symmetrically provided with a force application device, and a constructor can grasp the force application device by hand and open the float outwards when installing on a working line.
6. The deepwater floater based on the S-Lay mounting process according to claim 1, wherein the top of the floater body is provided with a positioning protrusion, the outer ring of the clamp is correspondingly provided with a positioning groove matched with the positioning protrusion, and the inner ring of the clamp is correspondingly provided with a rigging groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310941734.9A CN117022596A (en) | 2023-07-28 | 2023-07-28 | Deepwater floater based on S-Lay installation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310941734.9A CN117022596A (en) | 2023-07-28 | 2023-07-28 | Deepwater floater based on S-Lay installation technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117022596A true CN117022596A (en) | 2023-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310941734.9A Pending CN117022596A (en) | 2023-07-28 | 2023-07-28 | Deepwater floater based on S-Lay installation technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117022596A (en) |
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2023
- 2023-07-28 CN CN202310941734.9A patent/CN117022596A/en active Pending
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