WO2014170375A1 - Conduit balcony - Google Patents
Conduit balcony Download PDFInfo
- Publication number
- WO2014170375A1 WO2014170375A1 PCT/EP2014/057737 EP2014057737W WO2014170375A1 WO 2014170375 A1 WO2014170375 A1 WO 2014170375A1 EP 2014057737 W EP2014057737 W EP 2014057737W WO 2014170375 A1 WO2014170375 A1 WO 2014170375A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- conduit
- balcony
- longitudinal
- support portion
- floating unit
- Prior art date
Links
- 238000007667 floating Methods 0.000 claims abstract description 79
- 238000005452 bending Methods 0.000 claims description 9
- 230000001419 dependent effect Effects 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000012546 transfer Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000545 stagnation point adsorption reflectometry Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- -1 oil and gas Chemical class 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/002—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling
- E21B19/004—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling supporting a riser from a drilling or production platform
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
- B63B2003/145—Frameworks, i.e. load bearing assemblies of trusses and girders interconnected at nodal points
-
- 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
- B63B2035/448—Floating hydrocarbon production vessels, e.g. Floating Production Storage and Offloading vessels [FPSO]
Definitions
- the present disclosure relates to a conduit balcony according to the preamble of claim 1. Moreover, the present disclosure relates to a floating unit comprising a conduit balcony. '
- a floating unit may be used for drilling, producing or storing gases and/or liquids at sea.
- a floating unit may be used for drilling, producing or storing hydrocarbons, such as oil and gas, at sea.
- conduits may be connected to the floating unit.
- a conduit may be an electrical cable or an umbilical.
- a conduit may be a riser that provides a fluid communication between a bottom well in the seabed and the floating unit.
- a conduit may be an export riser that may be used for transporting fluid from the floating unit to e.g. a pipe line.
- the conduits may be supported by a conduit balcony that may be connected to the floating unit such that conduit loads are at least partially transferred to the floating unit via the conduit balcony.
- the one or more conduits that are supported by the conduit balcony may impart loads to the conduit balcony, which loads in turn result in stresses in at least portions of the conduit balcony.
- possible deflections of the floating unit for example due to it being acted on by waves, may result in additional stresses in at least portions of the conduit balcony.
- An object of the present disclosure is to obtain a conduit balcony with an appropriately low risk that the conduit balcony is subjected to undesirably high total stresses. This object is achieved by a conduit balcony according to claim 1 .
- the present disclosure relates to a conduit balcony for a floating unit.
- the conduit balcony comprises a support portion adapted to support at least one conduit.
- the conduit balcony further comprises a connection portion adapted to connect the support portion to the floating unit.
- the conduit balcony extends in a longitudinal direction and a transversal direction.
- support portion relates to the portion of the conduit balcony from which one or more conduits may be suspended.
- the support portion is related to the portion of the conduit balcony that is adapted to receive the load of one or more conduits.
- the support portion may comprise one or more members that are separate from one or more members that form the connection portion.
- the support portion and the connection portion may form a unitary component.
- the expression "support portion" is related to the portion of such a unitary component that is adapted to receive the load of one or more conduits.
- connection portion extends in the transversal direction from a first connection portion, adapted to be attached to the floating unit, to a second connection portion, attached to the support portion.
- the support portion comprises an inner support portion located closest to the first connection portion in the transversal direction.
- the conduit balcony is such that a first prescribed elongation, in the longitudinal direction, of the first connection portion results in a second elongation of the inner support portion.
- the second elongation may be in the longitudinal direction.
- the conduit balcony is configured such that the second elongation is less than or equal to 30 % of the first elongation.
- the expression “elongation” refers to the relative displacement between two end points of a member.
- the expression “elongation in the longitudinal ⁇ direction” relates to the relative displacement in the longitudinal direction between two longitudinal end points of a member.
- the conduit balcony is relatively weak in at least the longitudinal direction. This in turn implies that possible longitudinal deflections of the floating unit hosting the conduit balcony will impart only moderate stresses to the support portion. Thus, the total stresses in the support portion may be reduced, as compared to a conduit balcony that is relatively stiff in the longitudinal direction. Purely by way of example, the portion of the conduit balcony that is relatively weak may be the connection portion.
- the above-mentioned portion of the conduit balcony being relatively weak may be a portion of the conduit balcony being located more proximally to, e.g. closer to, the first connection portion in the transversal direction than the inner support portion of the support portion.
- the portion of the conduit balcony that is located closer to the first connection portion in the transversal direction than the inner support portion of the support portion may have a lower longitudinal stiffness than the inner support portion.
- the conduit balcony is configured such that the second elongation is less than or equal to 20 %, preferably less than or equal to 10%, more preferred less than or equal to 5%, of the first elongation.
- the conduit balcony may have a longitudinal stiffness selected such that the second elongation is less than or equal to 20 %, preferably less than or equal to 10%, more preferred less than or equal to 5%, of the first elongation.
- conduit relates to any type of conduit that is adapted to be connected to a floating unit in order to transport matter and/or energy and/or information to and/or from the floating unit.
- a conduit may be an electric cable, an umbilical or a riser.
- the support portion of a conduit balcony is adapted to support at least one riser.
- the expression “riser” relates to any type of conduit that is adapted to be used for transporting fluid to and/or from a floating unit.
- the expression “floating unit” comprises any type of unit that is adapted to float in a body of water.
- the expression “floating unit” encompasses a ship, a floating production storage and offloading unit (FPSO), a semi-submersible unit, a barge, a SPAR buoy, a tension leg platform (TLP) or the like.
- FPSO floating production storage and offloading unit
- TLP tension leg platform
- the conduit balcony is configured such that the second elongation is greater than or equal to 0.01 % of the first elongation.
- the fact that the second elongation is greater than or equal to 0.01 % of the first elongation implies that conduit loads in the longitudinal direction may be transferred to the floating unit in an appropriate manner.
- the conduit balcony is configured such that the second elongation is greater than or equal to 0.05 %, preferably greater than or equal to 0.1 %, more preferred greater than or equal to 0.2 %, of the first elongation.
- the first connection portion further comprises a longitudinal load transmitting means adapted to transmit longitudinal conduit loads from the support portion to the floating unit.
- the longitudinal load transmitting means comprises at least one longitudinal load transmitting panel.
- the use of a panel implies that a cost efficient and robust longitudinal load transmitting means may be obtained.
- the longitudinal load transmitting panel extends in a substantially horizontal direction, i.e. in the longitudinal and transversal directions.
- the conduit balcony is configured such that when a longitudinal load is applied to the support portion, at least 70%, preferably 90%, more preferred 95%, of the load is transferred to the first connection portion via the at least one longitudinal load transmitting panel.
- the connection portion comprises a plurality of connection plates, each one of which extending at least in the transversal direction.
- the conduit balcony further has an extension in a vertical direction, with each one of the connection plates further extending substantially in the vertical direction.
- each one of the connection plates has a bending stiffness, around a longitudinal axis parallel to the longitudinal direction, which is at least 100 times greater, preferably at least 10000 times greater, than the bending stiffness around a vertical axis parallel to the vertical direction.
- connection plate has a bending stiffness around a longitudinal axis that is substantially larger than the bending stiffness around a vertical axis implies that the connection plate may be able to transfer relatively large loads in a vertical direction whereas the connection plate may deflect when one end thereof, in the transversal direction, is subjected to a displacement in the longitudinal direction.
- the longitudinal load transmitting means is located between two adjacent connection plates.
- the conduit balcony comprises a transversal centre line extending in the transversal direction.
- the conduit balcony comprises a distal bracket space between two adjacent connection plates.
- the conduit balcony further comprises a proximal bracket space between two adjacent connection plates.
- the proximal bracket space is located closer, in the longitudinal direction, to the transversal centre line than the distal bracket space.
- the longitudinal load transmitting panel is located in the proximal bracket space.
- a possible longitudinal deflection of a floating unit hosting the conduit balcony will generally impart larger deflections of the longitudinal ends of the conduit balcony as compared to the longitudinal centre thereof.
- the placement of the longitudinal load transmitting panel in the proximal bracket space i.e. closer to the longitudinal centre of the conduit balcony than the position of the distal bracket space, implies that a relatively low amount of the unit's longitudinal deflections will be transferred to the support portion via the longitudinal load transmitting panel.
- the above discussed placement of the longitudinal load transmitting panel may result in that a longitudinal conduit load may be transferred to the unit in an appropriate manner but that deflections of the unit will not impart excessive stresses to the support portion of the conduit balcony.
- a second aspect of the present disclosure relates to a floating unit comprising a conduit balcony according to the first aspect of the present disclosure.
- the length in the longitudinal direction of the conduit balcony is 20 %, preferably less than 6%, of the length in the longitudinal direction of the floating unit.
- the fact that the conduit balcony is relatively short in relation to the length of the floating unit implies that a relatively small portion of the total elongation of the floating unit, for instance during sagging or hogging, will be imparted to the conduit balcony.
- Fig. 1 illustrates a floating unit comprising a conduit balcony
- Fig. 2 illustrates an embodiment of a conduit balcony
- Fig. 3 illustrates a portion of the Fig. 2 conduit balcony when being subjected to an
- Fig. 4 illustrates a first cross-section, IV, of the Fig. 2 conduit balcony
- Fig. 5 illustrates a second cross-section, V, of the Fig. 2 conduit balcony
- Fig. 6 a floating unit comprising a conduit balcony
- Fig. 7 illustrates a test method for determining the elongation of a conduit balcony
- Fig. 8 illustrates a test method for determining the load transfer through a conduit balcony.
- Fig. 1 illustrates a floating unit 10.
- the floating unit 10 is in Fig. 1 exemplified as a floating production storage and offloading unit (FPSO).
- FPSO floating production storage and offloading unit
- embodiments of the conduit balcony may instead, or in addition, be suitable for another type of floating unit such as a ship, a semi-submersible unit, a barge, a SPAR buoy, a tension leg platform (TLP) or the like.
- the floating unit 10 is adapted to float in a body of water 12 with a still water surface 14.
- the floating unit 10 may be equipped with a station-keeping arrangement (not shown).
- the station-keeping arrangement may comprise at least one mooring line (not shown) and/or at least one thruster (not shown).
- Fig. 1 further illustrates three conduits 16, 18, 20, each one of which being connected to the floating unit 10 via a conduit balcony 22.
- the conduit balcony 22 is adapted to be located beneath the still water surface 14.
- other embodiments of the conduit balcony 22 may be adapted to be located at or above the still water surface 14. Irrespective of the position of the conduit balcony 22, a purpose of a conduit balcony is generally to support loads, in particular vertical loads, from the conduits 16, 18, 20.
- a conduit may extend from the floating unit 10 to a sea bed (not shown).
- a conduit may extend from the floating unit 10 to another unit (not shown) that may be floating, or may be at least partially submersed, in the body of water 12.
- each one of the three conduits is a riser.
- a riser may be rigid or flexible.
- a riser may comprise a metal pipe, such as a steel pipe.
- a riser may comprise a tube with a plastic layer.
- a riser may comprise a composite tube, e.g. a tube comprising a plastic layer and a steel layer.
- other embodiments of the conduit balcony may also, or instead, be suitable for being connected to other types of conduits, such as electric cables (not shown) and/or umbilicals (not shown).
- each one of the conduits 16, 18, 20 may comprise a corresponding upper portion 17, 19, 21 which extends from the conduit balcony 22 to another portion of the floating unit.
- the upper portion may form a unitary component with the corresponding portion of the conduit that extends downwards from the conduit balcony 22.
- at least one of the upper portions 17, 19, 21 may be separate from the portion of the conduit that extends downwards from the conduit balcony 22.
- such an upper portion may be referred to as a hard pipe.
- At least one of the upper portions 17, 19, 21 may be adapted to accommodate the corresponding conduit 16, 18, 20 such that a portion of that conduit extends through the upper portion 17, 19, 21 and possibly to another portion of the floating unit.
- Fig. 2 illustrates a top view of an embodiment of a conduit balcony 22.
- the conduit balcony 22 comprises a support portion 24 adapted to support at least one conduit (not shown in Fig. 2).
- a support portion 24 may be adapted to support at least three conduits.
- the Fig. 2 support portion 24 is adapted to support eight conduits.
- the support portion 24 may comprise a recess or an opening for each one of the conduits that it is adapted to receive.
- the support portion 24 comprises one opening 25 for each one of the eight conduits.
- the Fig. 2 conduit balcony 22 further comprises a connection portion 26 adapted to connect the support portion 24 to the floating unit 10.
- the conduit balcony 22 extends in a longitudinal direction L and a transversal direction T.
- the support portion 24 may be fixedly attached to the connection portion 26 by means of a joint, e.g. a weld joint and/or a bolt joint.
- connection portion 26 extends in the transversal direction T from a first connection portion 26', adapted to be attached to the floating unit 10, e.g. to the outer skin 13 of the floating unit 10, to a second connection portion 26", attached to the support portion 24.
- the first connection portion 26' may be adapted to be attached to the floating unit by means of a weld joint and/or a bolt joint.
- the first connection portion 26' is adapted to be attached to the hull outer skin 13 of the floating unit 10.
- the floating unit 10 may comprise web frames 11' that are attached to the inside of the outer skin 13 of the floating unit 10.
- the support portion 24 comprises an inner support portion 24' located closest to the first connection portion 26' in the transversal direction T.
- Fig. 3 illustrates a portion of the Fig. 2 conduit balcony 22 when the first connection portion 26' is imparted an elongation in the longitudinal direction L.
- the conduit balcony 22 is such that a first prescribed elongation in the longitudinal direction L, of the first connection portion 26' results in a second elongation ⁇ 2 of the inner support portion 24'.
- the second elongation ⁇ 2 is less than or equal to 30 % of the first elongation ⁇ .
- connection portion 26 comprises a plurality of connection plates 28, each one of which extending at least in the transversal direction T. Moreover, the conduit balcony 22 further has an extension in a vertical direction V. Each one of the connection plates 28 further extends substantially in the vertical direction V.
- a connection plate 28, such as one of the plates that is illustrated in Fig. 2, may also be referred to as a connection bracket.
- Fig. 2 further illustrates that the location, in the longitudinal direction L, of a connection plate 28 may be the same as the longitudinal location of a web frame 11 ' of the floating unit 10. In this way, it is possible to obtain a load transfer between the conduit balcony 22 and the floating unit 10 without subjecting the panels forming the outer skin 13 of the floating unit 10 to undesirably large stresses.
- Fig. 4 illustrates a side view of a Fig. 2 connection plate 28.
- the Fig. 4 implementation of the connection plate 28 has an extension in the transversal direction T and in the vertical direction V.
- the Fig. 4 connection plate 28 comprises a metal plate, such as a steel plate.
- the height H, i.e. the maximum extension in the vertical direction V, of the connection plate 28 may be within the range of 2 to 15 meters, preferably within the range of 4 to 10 meters.
- the width W, i.e. the maximum extension in the transversal direction T, of the connection plate 28 may be within the range of 0.5 to 5 meters, preferably within the range of 0.8 to 1.5 meters.
- the thickness of the connection plate 28 may be within the range of 10 to 50 mm, preferably within the range of 15 to 40 mm.
- the Fig. 4 connection plate 28 has a bending stiffness at the first connection portion 26', around a longitudinal axis parallel to the longitudinal direction L, which is at least 100 times greater, preferably at least 1000 times greater, more preferred at least 10000 times greater, than the bending stiffness around a vertical axis parallel to the vertical direction V.
- Fig. 4 further illustrates that the support portion 24 may comprise a support box assembly which in turn comprises an upper panel 27' and a lower panel 27".
- the upper and lower panels 27', 27" may preferably be connected to one another by one or more webs 29', 29" and possibly also by partial webs (not shown in Fig. 4).
- each one of the upper panel 27' and a lower panel 27" may be a metal panel, such as a steel panel.
- each one of the upper panel 27' and a lower panel 27" may have a thickness within the range of 10 - 150 mm, preferably within the range of 30 - 100 mm.
- the vertical distance between the upper panel 27' and a lower panel 27 i.e. the distance between a bottom surface of the upper panel 27' and an upper surface of the lower panel 27" may be within the range of 300 - 1000 mm, preferably within the range of 500 - 700 mm.
- conduit balcony 22 is configured such that the second elongation ⁇ 2 is greater than or equal to 0.01 % of the first elongation ⁇ - ⁇ .
- the conduit balcony 22 is configured so as to have a certain longitudinal stiffness. The longitudinal stiffness may be advantageous since it may allow that longitudinal conduit loads be transferred to the floating unit.
- connection plate 28 could be designed so as to have a relatively large bending stiffness around a vertical axis parallel to the vertical direction V.
- the first connection portion 26 could comprise a longitudinal load transmitting means 30 adapted to transmit longitudinal conduit loads from the support portion to the floating unit.
- Fig. 2 illustrates an implementation of the longitudinal load transmitting means 30 that comprises at least one longitudinal load transmitting panel. In fact, the Fig. 2
- the conduit balcony 22 may be configured such that when a longitudinal load is applied to the support portion 24, at least 70%, preferably 90%, more preferred 95%, of that load is transferred to the first connection portion 26' via the at least one longitudinal load transmitting panels 32, 34.
- FIG. 5 A cross-section of the Fig. 2 embodiment of the conduit balcony 22, illustrating the position of the second load transmitting panel 34, is presented in Fig. 5.
- the longitudinal load transmitting means 30 may preferably be located between two adjacent connection plates 28.
- a longitudinal load transmitting means 30 may preferably be located in a bracket space between two adjacent connection plates 28.
- Fig. 2 illustrates that the embodiment of the conduit balcony 22 illustrated therein comprises a transversal centre line 38 extending in the transversal direction T. As such, the transversal centre line 38 is located in the longitudinal centre of the conduit balcony 22.
- the Fig. 2 embodiment of the conduit balcony 22 comprises a distal bracket space 42 between two adjacent connection plates 28. Moreover, the Fig. 2 conduit balcony comprises a proximal bracket space 44 between two adjacent connection plates 28. The proximal bracket space 44 is located closer, in the longitudinal direction L, to the transversal centre line 38 than the distal bracket space 42. The longitudinal load transmitting means 30 is located in the proximal bracket space 44. In the Fig. 2 embodiment of the conduit balcony 22, the proximal bracket space 44 is the bracket space that is located closest to the transversal centre line 38.
- a load transmitting panel 32, 34 may have a thickness within the range of 5 - 60 mm, preferably within the range of 15 - 40 mm.
- a load transmitting panel 32, 34 may be fixedly attached to its two adjacent connection plates 28. Moreover, as another non-limiting example, a load transmitting panel 32, 34 may also, or instead, be fixedly attached, to at least one of the support portion 24, e.g. the inner support portion 24', and the floating unit 10 such as the outer skin 13 thereof. Purely by way of example, the fixed attachment of a load transmitting panel 32, 34 to any one of the above components may be achieved by a weld joint and/or a bolt joint.
- connection portion 26 that in turn comprises connection plates 28 and possibly also one or more load transmitting panels 32, 34
- embodiments of the conduit balcony may comprise a connection portion that in turn comprises a lattice work and/or a truss system (not shown).
- Fig. 6 illustrates a portion of a floating unit 10.
- the Fig. 6 floating unit 10 comprises a plurality of conduit balconies 22.
- the floating unit 10 has a length L unit in the longitudinal direction L (i.e. the length between perpendiculars of the floating unit 10).
- a conduit balcony 22 preferably has a length L RB in the longitudinal direction L that is less than 20%, preferably less than 6%, of the floating unit's length L uni t.
- a floating unit 10 may comprise a plurality of rise balconies each one of which having a length that is less than 20%, preferably less than 6%, of the floating unit's length
- Fig. 7 illustrates a method for determining the second elongation of the inner support portion when the first connection portion is subjected to a first prescribed elongation.
- a finite element (FE) model is generated for the conduit balcony 22.
- the FE model should be generated so as to model the shape and material of the parts constituting the conduit balcony 22.
- the FE nodes of the first connection portion 26' are identified.
- the first connection portion 26' is adapted to be attached to the floating unit (not shown in Fig. 7).
- the nodes of the inner support portion 24' that are located at the first and second longitudinal ends 48, 50 of the conduit balcony 22 are determined.
- the longitudinal distance L s between nodes at the first and second longitudinal ends 48, 50 of the inner support portion 24' is determined before any portion of the conduit balcony 22 has been subjected to any displacement.
- a magnitude of the first prescribed elongation ⁇ is determined.
- the magnitude of the first prescribed elongation ⁇ should be relatively small such that substantially only elastic deformations occur in the conduit balcony, be it that some local plastic deformation inevitably may occur.
- the first prescribed elongation ⁇ - ⁇ is distributed along the longitudinal direction L such that the displacement is zero at the first longitudinal end 26'a of the first connection portion 26' and the longitudinal displacement equals at the second longitudinal end 26'b of the first connection portion 26'.
- each node of the first connection portion 26' that is included in the first longitudinal end 26'a is locked from displacement in all three translational displacement directions, i.e. the longitudinal, transversal and vertical directions and also locked from rotation around axis parallel to the longitudinal, transversal and vertical directions.
- L RB equals the distance, in the longitudinal direction L, between 26'a and 26'b before the elongation of 26'.
- Each one of the FE nodes of the first connection portion 26' is subjected to a longitudinal displacement corresponding to the longitudinal position of the node in accordance with Eq. 1 hereinabove.
- Each node, except for the one(s) located at 26'a, is locked in the remaining 5 degrees of freedom.
- the longitudinal distance L s2 between the nodes at the first and second longitudinal ends 48, 50 is determined after the first connection portion 26' has been subjected to the above discussed displacements. If the FE model comprises a plurality of nodes each one of which being located at the first and second longitudinal end, end 48 and 50, but on different vertical position, the average position of these nodes at each end is used to determine the value of the distances L s , L s2 between the first and second longitudinal ends 48, 50.
- Fig. 8 illustrates a method for determining the load transfer through a conduit balcony.
- a finite element (FE) model is generated for the conduit balcony 22.
- the FE model should be generated so as, to model the shape and material of the parts constituting the conduit balcony 22.
- the FE nodes of the first connection portion are identified.
- the first connection portion 26' is adapted to be attached to the floating unit (not shown in Fig. 8).
- Each node that is included in the first connection portion 26' is locked from displacement in all three translational displacement directions, i.e. the longitudinal, transversal and vertical directions and locked from rotation around axis parallel to the longitudinal, transversal and vertical directions
- a magnitude of a longitudinal load F L is determined.
- the magnitude of the first prescribed elongation F L should be relatively small such that substantially only elastic deformations occur in the conduit balcony, be it that some local plastic deformation inevitably may occur.
- the longitudinal load F L is applied to the support portion 24 of the conduit balcony 22. To this end, half the longitudinal load F L /2 is applied to the transversal centre 40 of support portion 24 at its aftmost longitudinal end 41 and half the longitudinal load F L /2 is applied at the foremost longitudinal end 42.
- reaction forces in the longitudinal direction of the nodes belonging to the longitudinal load transmitting panel 32 as well as the first connection portion 26' are determined by means of FE analysis. The sum of these reaction forces is the total load that is transferred by the longitudinal load transmitting panel 32 to the unit 10.
- the present disclosure relates to a conduit balcony (22) for a floating unit (10).
- the conduit balcony (22) comprises a support portion (24) adapted to support at least one conduit.
- the conduit balcony (22) further comprises a connection portion (26) adapted to connect the support portion (24) to the floating unit (10).
- the conduit balcony (22) extends in a longitudinal direction (L) and a transversal direction (T).
- the connection portion (26) extends in the transversal direction (T) from a first connection portion (26'), adapted to be attached to the floating unit (10), to a second connection portion (26"), attached to the support portion (24).
- the support portion (24) comprises an inner support portion (24') located closest to the first connection portion (26') in the transversal direction (T).
- the conduit balcony (22) is such that a first prescribed elongation ( ⁇ - ⁇ ), in the longitudinal direction (L), of the first connection portion (26') results in a second elongation ( ⁇ 2 ) of the inner support portion (24').
- the conduit balcony (22) is configured such that the second elongation ( ⁇ 2 ) is less than or equal to 30 % of the first elongation ( ⁇ .
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- Combustion & Propulsion (AREA)
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- Steps, Ramps, And Handrails (AREA)
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020157032635A KR102150139B1 (en) | 2013-04-16 | 2014-04-16 | Conduit balcony |
CN201480034401.7A CN105339584A (en) | 2013-04-16 | 2014-04-16 | Conduit balcony |
SG11201508584RA SG11201508584RA (en) | 2013-04-16 | 2014-04-16 | Conduit balcony |
BR112015026192-2A BR112015026192B1 (en) | 2013-04-16 | 2014-04-16 | GALLERY FOR CONDUIT FOR A FLOATING UNIT AND, FLOATING UNIT |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20130527 | 2013-04-16 | ||
NO20130527A NO335480B1 (en) | 2013-04-16 | 2013-04-16 | pipeline Suspension |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014170375A1 true WO2014170375A1 (en) | 2014-10-23 |
Family
ID=50543577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2014/057737 WO2014170375A1 (en) | 2013-04-16 | 2014-04-16 | Conduit balcony |
Country Status (6)
Country | Link |
---|---|
KR (1) | KR102150139B1 (en) |
CN (1) | CN105339584A (en) |
BR (1) | BR112015026192B1 (en) |
NO (1) | NO335480B1 (en) |
SG (1) | SG11201508584RA (en) |
WO (1) | WO2014170375A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016117363A (en) * | 2014-12-19 | 2016-06-30 | 三井造船株式会社 | Fairing cover |
WO2019044194A1 (en) * | 2017-08-31 | 2019-03-07 | 三井E&S造船株式会社 | Riser pipe support structure |
WO2022067410A1 (en) * | 2020-10-02 | 2022-04-07 | Petróleo Brasileiro S.A. - Petrobras | Polyvalent riser balcony |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110861753B (en) * | 2019-11-28 | 2022-01-11 | 中国船舶工业集团公司第七0八研究所 | Culture water extraction system of deep open sea salmon culture ship |
CN111188596B (en) * | 2019-12-30 | 2022-05-31 | 中海石油(中国)有限公司 | Offshore oil platform riser centralizing hole arrangement method |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2249059A (en) * | 1990-10-09 | 1992-04-29 | Petroleo Brasileiro Sa | Semi submersible production platform |
GB2259127A (en) * | 1991-08-29 | 1993-03-03 | Petroleo Brasileiro Sa | Supporting lines and conductor pipes at offshore platforms |
US5269629A (en) * | 1991-07-29 | 1993-12-14 | Shell Oil Company | Elastomeric swivel support assembly for catenary riser |
WO1999000293A1 (en) * | 1997-06-30 | 1999-01-07 | Kvaerner Oilfield Products A.S | A tether and method of installation on a platform |
FR2768457A1 (en) * | 1997-09-12 | 1999-03-19 | Stolt Comex Seaway | Device for transport of oil products from the seabed to the surface |
US20040182297A1 (en) * | 2003-02-28 | 2004-09-23 | Modec International, L.L.P. | Riser pipe support system and method |
-
2013
- 2013-04-16 NO NO20130527A patent/NO335480B1/en not_active IP Right Cessation
-
2014
- 2014-04-16 BR BR112015026192-2A patent/BR112015026192B1/en active IP Right Grant
- 2014-04-16 CN CN201480034401.7A patent/CN105339584A/en active Pending
- 2014-04-16 WO PCT/EP2014/057737 patent/WO2014170375A1/en active Application Filing
- 2014-04-16 SG SG11201508584RA patent/SG11201508584RA/en unknown
- 2014-04-16 KR KR1020157032635A patent/KR102150139B1/en active IP Right Grant
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2249059A (en) * | 1990-10-09 | 1992-04-29 | Petroleo Brasileiro Sa | Semi submersible production platform |
US5269629A (en) * | 1991-07-29 | 1993-12-14 | Shell Oil Company | Elastomeric swivel support assembly for catenary riser |
GB2259127A (en) * | 1991-08-29 | 1993-03-03 | Petroleo Brasileiro Sa | Supporting lines and conductor pipes at offshore platforms |
WO1999000293A1 (en) * | 1997-06-30 | 1999-01-07 | Kvaerner Oilfield Products A.S | A tether and method of installation on a platform |
FR2768457A1 (en) * | 1997-09-12 | 1999-03-19 | Stolt Comex Seaway | Device for transport of oil products from the seabed to the surface |
US20040182297A1 (en) * | 2003-02-28 | 2004-09-23 | Modec International, L.L.P. | Riser pipe support system and method |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016117363A (en) * | 2014-12-19 | 2016-06-30 | 三井造船株式会社 | Fairing cover |
CN107207074A (en) * | 2014-12-19 | 2017-09-26 | 三井造船株式会社 | Radome fairing |
WO2019044194A1 (en) * | 2017-08-31 | 2019-03-07 | 三井E&S造船株式会社 | Riser pipe support structure |
WO2022067410A1 (en) * | 2020-10-02 | 2022-04-07 | Petróleo Brasileiro S.A. - Petrobras | Polyvalent riser balcony |
GB2615673A (en) * | 2020-10-02 | 2023-08-16 | Petroleo Brasileiro Sa Petrobras | Polyvalent riser balcony |
Also Published As
Publication number | Publication date |
---|---|
NO20130527A1 (en) | 2014-10-17 |
NO335480B1 (en) | 2014-12-15 |
BR112015026192A2 (en) | 2017-07-25 |
SG11201508584RA (en) | 2015-11-27 |
CN105339584A (en) | 2016-02-17 |
BR112015026192B1 (en) | 2021-12-28 |
KR102150139B1 (en) | 2020-08-31 |
KR20150143762A (en) | 2015-12-23 |
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