CA1109767A - System for transferring hydrocarbons to a tanker - Google Patents
System for transferring hydrocarbons to a tankerInfo
- Publication number
- CA1109767A CA1109767A CA298,284A CA298284A CA1109767A CA 1109767 A CA1109767 A CA 1109767A CA 298284 A CA298284 A CA 298284A CA 1109767 A CA1109767 A CA 1109767A
- Authority
- CA
- Canada
- Prior art keywords
- stack
- single point
- tanker
- mooring
- mooring device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 5
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 5
- 239000007789 gas Substances 0.000 claims abstract description 40
- 238000013022 venting Methods 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002245 particle Substances 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/005—Waste disposal systems
- E21B41/0071—Adaptation of flares, e.g. arrangements of flares in offshore installations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B22/00—Buoys
- B63B22/02—Buoys specially adapted for mooring a vessel
- B63B22/021—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A B S T R A C T
A system for transferring hydrocarbons produced from an offshore oil- or gas field to a tanker, comprising:
a single point mooring device provided with a mooring element for mooring a tanker thereto, which element is rotatable around a vertical axis;
a separator arranged on, or close to, the single point mooring device;
a conduit extending from the offshore oil- or gas field to the separator, a conduit extending from the separator and being adapted to be connected with the tanker moored to the single point mooring device, a stack for flaring or venting gases, which stack is mounted on the single point mooring device in such a manner that it is rotatable around a vertical axis;
gas conduit means between the separator and the stack.
A system for transferring hydrocarbons produced from an offshore oil- or gas field to a tanker, comprising:
a single point mooring device provided with a mooring element for mooring a tanker thereto, which element is rotatable around a vertical axis;
a separator arranged on, or close to, the single point mooring device;
a conduit extending from the offshore oil- or gas field to the separator, a conduit extending from the separator and being adapted to be connected with the tanker moored to the single point mooring device, a stack for flaring or venting gases, which stack is mounted on the single point mooring device in such a manner that it is rotatable around a vertical axis;
gas conduit means between the separator and the stack.
Description
l~g7~7 The invention relates to a system for trans~erring hydrocarbons produced from an offshore oil- or gas field to a tanker~ and more in particular to transferring crude oil to a shuttle tanker or to a storage tanker by means of a single point mooring device provided with a separator, ; wherein gas present in the crude oil is separated from the crude oil and the separated oil is loaded into the tanker.
A problem with such a system is the disposal of gases either continuously or in emergency cases only. A known simple way of dealing with the gas is to flare or vent it by means of a stack mounted on ~he single point mooring device. However, the gases, the heat, fumes, unburned gases, and possible liquid particles produced by the stack cause hazards and hindrance to the tanker moored to the single point mooring device, since stack and tanker orientation can coincide depending on wind and current direction. Also ~ helicopter operations can be seriously hampered or become - even impossible when the wind is directed from the stack towards the helideck. ~urthermore, if a supply boat is moored to the device, the same problems as with the tanker may occur.
In order to deal with this problem, a system for transferring hydrocarbons produced from an offshore oil-or ~as field to a tanker, comprises according to the in-vention a single point mooring device provided with a ; mooring element for mooring a tanker thereto, which 17~7 element is rotatable around a vertical axis, a separator arranged on, orclosè to, the single point mooring device, a conduit extending from the offshore oil - or gas field to the separator, a conduit extending from the separator and being adapted to be connected with the tanker moored to the single point mooring device, a stack for flaring or venting gases, which stack is mounted on the single point mooring device in such a manner that it is rotatable around a vertical axis relating to the single point mooring device, so that the stack can be so positioned that the tanker experiences the least hindrance from the gases leaving the stack, and gas conduit means between the separator and the stack.
In a possible embodiment of the invention a stack is mounted on or coupled to a rotatable memberJ which is rotatable around a vertical axis.
In an attractive embodiment of the invention a stack is mounted on or coupled to the rotatable mooring element.
The invention will be further explained with reference to the drawings showing two possible embodiments of the invention.
Figure 1 shows a schematic side view of a first embodiment of a single point mooring device on its location.
Figure 2 shows a perspective of the same device.
Figure 3 shows the same single point mooring device during towage.
Figure 4 shows a schematic side view of another embodiment of a ~ single point moOTing device on its location.
c Fig. 5 shows a side view IV-IV o' the device as shown in fig. 4.
Fig. 6 shows a schematic top plan view of the device as shown in fig. 4 on an enlarged scale.
In the embodiment as shown in figures 1 through 3, which is destined for use on an offshore oil field, a single point mooring device 1 comprises a buoyancy element 2 and ballast elements 4 secured to the buoyancy element 2. By means of a number of columns 5, the buoyancy element 2 carries a deck 3 and a superstructure 6. The buoyancy element 2 has . :~
- an annular shape. The ballast elements 4 are applied in this embodiment in order to obtain adequate stability of - the device in an efficient manner.
The deck 3 is provided with a rail 7 which is of annular shape. A mooring element 18 is so arranged on the annular rail 7 that it is rotatable around a vertical axis relative to the superstructure 6. A tanker 8 can be moored to the mooring element 18 in a suitable manner. In the embodiment as shown in figures 1 and 2 a mooring hawser 9 is used for mooring the tanker 8 to the mooring element 18.
The single point mooring device 1 is anchored to the sea - bottom 10 by means of conventional anchor lines 11 and anchors (not shown).
A number of oil wells in the sea bottom 10, of which one is shown and is indicated by the reference numeral 12, -~ is connected to a central manifold 13 by corresponding flow : ' ..`' . ., -5~ 7~7 llnes 14. The central manifold 13 is connected by a number of risers 1~ to production equipment 16 accommodated in the superstructure 6. The production equipment or separator 16 serves amon~st others for separating gas from the crude oil. The gas separated from the oil can be led through a gas conduit 20 to a stack 21. The oil separated from the gas can be led through a conduit 22 to a loading arm 23 which is carried by the mooring element 18. Via the loading arm 23 the conduit 22 is in communication with a loading hose 24 which is carried by the loading arm 23 and which is adapted to be connected to the tanker 8.
The s,ack 21 is mounted on a rotatable member or con-struction 25. The rotatable member 25 is mounted on the superstructure 6 in such a manner that it is rotatable around a vertical axis relative to the superstructure 6.
The stack 21 extends upwardly from the rotatable member 25 and laterally away from the superstructure 6 in order to keep the vented or flared gases 26 leaving the stack 21 away from the single point mooring device 1 and the tanker 8.
;`~ 20 The use of the single point moorir.g system according to the invention is as follows. The device 1 is towed to .~ the desired location by a tug 17 while the device 1 is in the condition as shown in figure 3. In ~his condition the ballast elements 4 are retracted and locked in such a - 25 position that minimum drau~ht is obtained. In said position the ballast elements 4 extend upwardly above the buoyancy .; .
-6~ 767 element 2 as shown. During towage the buoyancy element 2 is deballasted so that it is floating at the water surface 27 as shown.
Upon arrival at the desired location, the ballast elements 4 are lowered by allowing them to slide down-wardly thro~gh vertical openings in the buoyancy element 2.
When the ballast elements 4 have been lowered and have reached the low position relatively to the buoyancy element
A problem with such a system is the disposal of gases either continuously or in emergency cases only. A known simple way of dealing with the gas is to flare or vent it by means of a stack mounted on ~he single point mooring device. However, the gases, the heat, fumes, unburned gases, and possible liquid particles produced by the stack cause hazards and hindrance to the tanker moored to the single point mooring device, since stack and tanker orientation can coincide depending on wind and current direction. Also ~ helicopter operations can be seriously hampered or become - even impossible when the wind is directed from the stack towards the helideck. ~urthermore, if a supply boat is moored to the device, the same problems as with the tanker may occur.
In order to deal with this problem, a system for transferring hydrocarbons produced from an offshore oil-or ~as field to a tanker, comprises according to the in-vention a single point mooring device provided with a ; mooring element for mooring a tanker thereto, which 17~7 element is rotatable around a vertical axis, a separator arranged on, orclosè to, the single point mooring device, a conduit extending from the offshore oil - or gas field to the separator, a conduit extending from the separator and being adapted to be connected with the tanker moored to the single point mooring device, a stack for flaring or venting gases, which stack is mounted on the single point mooring device in such a manner that it is rotatable around a vertical axis relating to the single point mooring device, so that the stack can be so positioned that the tanker experiences the least hindrance from the gases leaving the stack, and gas conduit means between the separator and the stack.
In a possible embodiment of the invention a stack is mounted on or coupled to a rotatable memberJ which is rotatable around a vertical axis.
In an attractive embodiment of the invention a stack is mounted on or coupled to the rotatable mooring element.
The invention will be further explained with reference to the drawings showing two possible embodiments of the invention.
Figure 1 shows a schematic side view of a first embodiment of a single point mooring device on its location.
Figure 2 shows a perspective of the same device.
Figure 3 shows the same single point mooring device during towage.
Figure 4 shows a schematic side view of another embodiment of a ~ single point moOTing device on its location.
c Fig. 5 shows a side view IV-IV o' the device as shown in fig. 4.
Fig. 6 shows a schematic top plan view of the device as shown in fig. 4 on an enlarged scale.
In the embodiment as shown in figures 1 through 3, which is destined for use on an offshore oil field, a single point mooring device 1 comprises a buoyancy element 2 and ballast elements 4 secured to the buoyancy element 2. By means of a number of columns 5, the buoyancy element 2 carries a deck 3 and a superstructure 6. The buoyancy element 2 has . :~
- an annular shape. The ballast elements 4 are applied in this embodiment in order to obtain adequate stability of - the device in an efficient manner.
The deck 3 is provided with a rail 7 which is of annular shape. A mooring element 18 is so arranged on the annular rail 7 that it is rotatable around a vertical axis relative to the superstructure 6. A tanker 8 can be moored to the mooring element 18 in a suitable manner. In the embodiment as shown in figures 1 and 2 a mooring hawser 9 is used for mooring the tanker 8 to the mooring element 18.
The single point mooring device 1 is anchored to the sea - bottom 10 by means of conventional anchor lines 11 and anchors (not shown).
A number of oil wells in the sea bottom 10, of which one is shown and is indicated by the reference numeral 12, -~ is connected to a central manifold 13 by corresponding flow : ' ..`' . ., -5~ 7~7 llnes 14. The central manifold 13 is connected by a number of risers 1~ to production equipment 16 accommodated in the superstructure 6. The production equipment or separator 16 serves amon~st others for separating gas from the crude oil. The gas separated from the oil can be led through a gas conduit 20 to a stack 21. The oil separated from the gas can be led through a conduit 22 to a loading arm 23 which is carried by the mooring element 18. Via the loading arm 23 the conduit 22 is in communication with a loading hose 24 which is carried by the loading arm 23 and which is adapted to be connected to the tanker 8.
The s,ack 21 is mounted on a rotatable member or con-struction 25. The rotatable member 25 is mounted on the superstructure 6 in such a manner that it is rotatable around a vertical axis relative to the superstructure 6.
The stack 21 extends upwardly from the rotatable member 25 and laterally away from the superstructure 6 in order to keep the vented or flared gases 26 leaving the stack 21 away from the single point mooring device 1 and the tanker 8.
;`~ 20 The use of the single point moorir.g system according to the invention is as follows. The device 1 is towed to .~ the desired location by a tug 17 while the device 1 is in the condition as shown in figure 3. In ~his condition the ballast elements 4 are retracted and locked in such a - 25 position that minimum drau~ht is obtained. In said position the ballast elements 4 extend upwardly above the buoyancy .; .
-6~ 767 element 2 as shown. During towage the buoyancy element 2 is deballasted so that it is floating at the water surface 27 as shown.
Upon arrival at the desired location, the ballast elements 4 are lowered by allowing them to slide down-wardly thro~gh vertical openings in the buoyancy element 2.
When the ballast elements 4 have been lowered and have reached the low position relatively to the buoyancy element
2 as shown in figures 1 and 2, the ballast elements 4 are locked again to the buoyancy element 2. Then the buoyancy element 2 is ballasted at least partly with water so that the single point mooring device 1 reaches the desired draught as shown in figures 1 and 2. The de~ice is anchored by the anchor cables 11 and conventional anchors (not shown). Finally, the risers 15 are installed so that a fluid communication is created between the central mani-- fold 13 and the production equipment 16.
During the early production phase of the oil field, .
the oil produced by a number of oil wells flows through flow lines 1~, central manifold 13 and risers 15 to the production equipment 16. During this early production phase a shuttle tanker 8 is moored by the mooring hawser 9 to the mooring element 18 and the loading hose 24 is con-nected to the tanker 8. In the production equipment or separator 16 gas is separated from the oil. The gas is passed via a pipe swivel (not shown) allowing rotation ~` -7-1 ~
around a vertical axis and via gas conduit 20 to the stack 21. At the top of the stack 21 the gas is vented or it is burned so that a flare 26 is formed.
.~ The separated oil is passed from the production ; 5 equipment 16 via a pipe swivel (not shown) allowing rotation around a vertical axis, the conduit 22, the loading arm 23 and the hose 24 to the tanker 8. Since the mooring element 18 is rotatable around a vertical axis relative to the single point mooring device 1, the tanker 8 is free to swing around the mooring device 1 in dependence of current- and wind forces. To protect the tanker 8 from the hot combustion gases and the radiation produced by the flare 25 or from the vented gases, the rotatable member 25 is rotated together with the stack 21, relatively to the mooring element 18 in such a manner that the stack 21 reaches - a position in which the tanker 8 experiences the le~t hindrance - of the gases leaving stack 21 or of the combustion gases and radiation produced by the flare 26. In that position the -~ rotatable member 25 can be coupled to the mooring element 18 so that the rotatable member 25 and the mooring element ~ 18 will rotate as one unit.
;- When the oil field has reached such a rate of production that interrupted production could be undesirable from a technical and an economical point of view, the export shuttle ~ -~; 25 tanker 8 is replaced by a storage tanker (not shown) which is permanently moored to the singe point mooring device 1, i'67 where~ the storage tankc~r can be moGred to the mooring element 18 b~r means of a mooring yoke (not shown) which is permanently arranged between the storage tanker and the single point mooring device. This mooring yoke carries a suitable conduit for creating a fluid communication between the single point mooring device and the storage tanker. When such a storage tanker is permanently moored to the single point mooring device, care is taken that the rotatable member 25 together with the stack 21 is rotated in such a manner that stack 21 reaches a position wherein the storage tanker experiences the le~ttrouble from the gases and/or heat and fumes from the stack 21.
Periodically an export tanker is moored to the storage tanker to be loaded and to transport the oil to a desired location.
If desired part of the buoyancy element 2 can be used for temporarily storing oil or condensates therein.
In the embodiment as shown in figures4 through 6, a number of equivalent elements are indicated by the same ; 20 reference numerals as in ~igures 1 through 3, viz. the elements 1, 2, 4, 5, 6, 8, 10, 11, 13, 14, 15, 16 and 27 and in connection with these elements reference is made to ' the description of figures 1 through 3. The single point mooring device 1 is pro~ided with a mooring element 28 which is mounted on an annu]ar rail 35 in such a manner - that the mooring element 28 is rotatable around a vertical - 9~ 7~7 .
a~is. The annular rail 35 is mounted on a deck 34.
- A tanlcer 8 can be moored to the rotatable mooring element 28 by way of a fastening device 29 in the form of a mooring yoke.
The oii separated from the gas in the separator 16 can be led through a conduit 30 to the tanker 8.
The Gas separated from the oil in the separator or production equipment 16 can be led through a suitable conduit (not shown) to one of two stacks 31, which are coupled to the rotatable mooring element 28 by means of coupling elements 36 and annular coupling elements 37.
:. Valve means (not shown) are present to direct gas from the ~parator 16 to a selected stack 31. The stacks 31 extend upwardly and laterally away from the superstructure 6.
: ~ 15 The single point mooring device is further provided with a helideck 33, coupled to the rotatable mooring ~A~ element 28 by means of coupling elements 38 and coupling elements 36 and 37.
The two stacks 31 are symmetrically arranged relative ~ 20 to a vertical plane A-A passing through the ver'cical :. rotation axis of the mooring element 28 and through the middel of fastening device 29. In the embodiment as shown the two stacks 31 are so arranged relative to the fastening device 29 and the helideck 33 that the free area necessary for use of the helideck 33 and the approach to the heli-deck 33 is sufficient and the gases produced by a stack 31 .~
7Ç;7 are kept away as far as possible from the helideck 33 and from the tanker S.
In normal operation, one of the stacks 31 is selected for use, depending on wind- and current conditions and the actual orientation of the tanker in such a manner that the tanker 8 experiences the least hindrance from the gases produced by the selected stack 31.
In the above, embodiments of the invention have been described when applied to an offshore oil field.
Instead, the system according to the invention can be used as well on an offshore natural gas field. Then con-densates are separated from the natural gas and the con-- densates are loaded into a tanker moored to the single point mooring detJice. The natural gas is transported to shore by means of apipeline. In case of an emergency natural ; gas is flared by means of the stacks as described.
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During the early production phase of the oil field, .
the oil produced by a number of oil wells flows through flow lines 1~, central manifold 13 and risers 15 to the production equipment 16. During this early production phase a shuttle tanker 8 is moored by the mooring hawser 9 to the mooring element 18 and the loading hose 24 is con-nected to the tanker 8. In the production equipment or separator 16 gas is separated from the oil. The gas is passed via a pipe swivel (not shown) allowing rotation ~` -7-1 ~
around a vertical axis and via gas conduit 20 to the stack 21. At the top of the stack 21 the gas is vented or it is burned so that a flare 26 is formed.
.~ The separated oil is passed from the production ; 5 equipment 16 via a pipe swivel (not shown) allowing rotation around a vertical axis, the conduit 22, the loading arm 23 and the hose 24 to the tanker 8. Since the mooring element 18 is rotatable around a vertical axis relative to the single point mooring device 1, the tanker 8 is free to swing around the mooring device 1 in dependence of current- and wind forces. To protect the tanker 8 from the hot combustion gases and the radiation produced by the flare 25 or from the vented gases, the rotatable member 25 is rotated together with the stack 21, relatively to the mooring element 18 in such a manner that the stack 21 reaches - a position in which the tanker 8 experiences the le~t hindrance - of the gases leaving stack 21 or of the combustion gases and radiation produced by the flare 26. In that position the -~ rotatable member 25 can be coupled to the mooring element 18 so that the rotatable member 25 and the mooring element ~ 18 will rotate as one unit.
;- When the oil field has reached such a rate of production that interrupted production could be undesirable from a technical and an economical point of view, the export shuttle ~ -~; 25 tanker 8 is replaced by a storage tanker (not shown) which is permanently moored to the singe point mooring device 1, i'67 where~ the storage tankc~r can be moGred to the mooring element 18 b~r means of a mooring yoke (not shown) which is permanently arranged between the storage tanker and the single point mooring device. This mooring yoke carries a suitable conduit for creating a fluid communication between the single point mooring device and the storage tanker. When such a storage tanker is permanently moored to the single point mooring device, care is taken that the rotatable member 25 together with the stack 21 is rotated in such a manner that stack 21 reaches a position wherein the storage tanker experiences the le~ttrouble from the gases and/or heat and fumes from the stack 21.
Periodically an export tanker is moored to the storage tanker to be loaded and to transport the oil to a desired location.
If desired part of the buoyancy element 2 can be used for temporarily storing oil or condensates therein.
In the embodiment as shown in figures4 through 6, a number of equivalent elements are indicated by the same ; 20 reference numerals as in ~igures 1 through 3, viz. the elements 1, 2, 4, 5, 6, 8, 10, 11, 13, 14, 15, 16 and 27 and in connection with these elements reference is made to ' the description of figures 1 through 3. The single point mooring device 1 is pro~ided with a mooring element 28 which is mounted on an annu]ar rail 35 in such a manner - that the mooring element 28 is rotatable around a vertical - 9~ 7~7 .
a~is. The annular rail 35 is mounted on a deck 34.
- A tanlcer 8 can be moored to the rotatable mooring element 28 by way of a fastening device 29 in the form of a mooring yoke.
The oii separated from the gas in the separator 16 can be led through a conduit 30 to the tanker 8.
The Gas separated from the oil in the separator or production equipment 16 can be led through a suitable conduit (not shown) to one of two stacks 31, which are coupled to the rotatable mooring element 28 by means of coupling elements 36 and annular coupling elements 37.
:. Valve means (not shown) are present to direct gas from the ~parator 16 to a selected stack 31. The stacks 31 extend upwardly and laterally away from the superstructure 6.
: ~ 15 The single point mooring device is further provided with a helideck 33, coupled to the rotatable mooring ~A~ element 28 by means of coupling elements 38 and coupling elements 36 and 37.
The two stacks 31 are symmetrically arranged relative ~ 20 to a vertical plane A-A passing through the ver'cical :. rotation axis of the mooring element 28 and through the middel of fastening device 29. In the embodiment as shown the two stacks 31 are so arranged relative to the fastening device 29 and the helideck 33 that the free area necessary for use of the helideck 33 and the approach to the heli-deck 33 is sufficient and the gases produced by a stack 31 .~
7Ç;7 are kept away as far as possible from the helideck 33 and from the tanker S.
In normal operation, one of the stacks 31 is selected for use, depending on wind- and current conditions and the actual orientation of the tanker in such a manner that the tanker 8 experiences the least hindrance from the gases produced by the selected stack 31.
In the above, embodiments of the invention have been described when applied to an offshore oil field.
Instead, the system according to the invention can be used as well on an offshore natural gas field. Then con-densates are separated from the natural gas and the con-- densates are loaded into a tanker moored to the single point mooring detJice. The natural gas is transported to shore by means of apipeline. In case of an emergency natural ; gas is flared by means of the stacks as described.
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Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A system for transferring hydrocarbons produced from an offshore oil or gas field to a tanker, comprising:
a single point mooring device provided with a mooring element for mooring a tanker thereto, which element is rotatable around a vertical axis;
a separator arranged on, or close to, the single point mooring device;
a conduit extending from the offshore oil or gas field to the separator;
a conduit extending from the separator and being adapted to be connected with the tanker moored to the single point mooring device;
a stack for flaring or venting gases, which stack is mounted on the single point mooring device in such a manner that it is rotatable around a vertical axis relative to the single point mooring device, so that the stack can be so positioned that the tanker experiences the least hindrance from the gases leaving the stack; and gas conduit means between the separator and the stack.
a single point mooring device provided with a mooring element for mooring a tanker thereto, which element is rotatable around a vertical axis;
a separator arranged on, or close to, the single point mooring device;
a conduit extending from the offshore oil or gas field to the separator;
a conduit extending from the separator and being adapted to be connected with the tanker moored to the single point mooring device;
a stack for flaring or venting gases, which stack is mounted on the single point mooring device in such a manner that it is rotatable around a vertical axis relative to the single point mooring device, so that the stack can be so positioned that the tanker experiences the least hindrance from the gases leaving the stack; and gas conduit means between the separator and the stack.
2. A system as claimed in claim 1, wherein the stack is attached to a rotatable member, which is rotatable around a vertical axis relative to the single point mooring device.
3. A system as claimed in claim 2, wherein a plurality of stacks are attached to the rotatable mooring element and valve means are present, which valve means are adapted to direct gas from the separator to a selected stack.
4. A system as claimed in claim 3, comprising two stacks, symmetrical-ly arranged relative to a vertical plane passing through the vertical rota-tion axis of the mooring element and through a fastening device on the mooring element.
5. A system as claimed in claim 2, wherein the stack is mounted on a rotatable member which is rotatable around a vertical axis relative to the rotatable mooring element.
6. A single point mooring device for use in the system as claimed in claim 1, comprising a mooring element for mooring a tanker to the device which element is rotatable around a vertical axis, and a stack for flaring or venting separated gases, which stack is mounted on the single point mooring device in such a manner that it is rotatable around a vertical axis relative to the single point mooring device.
7. A single point mooring device as claimed in claim 6, wherein the stack is attached to a rotatable member, which is rotatable around a vertical axis relative to the single point mooring device.
8. A single point mooring device as claimed in claim 7, wherein a plurality of stacks are attached to the rotatable mooring element and valve means are present, which valve means are adapted to direct gas from a separator to a selected stack.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB15946/77A GB1547092A (en) | 1977-04-18 | 1977-04-18 | System for transferring hydrocarbons to a tanker |
| GB15946/77 | 1978-02-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1109767A true CA1109767A (en) | 1981-09-29 |
Family
ID=10068408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA298,284A Expired CA1109767A (en) | 1977-04-18 | 1978-03-06 | System for transferring hydrocarbons to a tanker |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS6058119B2 (en) |
| AU (1) | AU512066B2 (en) |
| CA (1) | CA1109767A (en) |
| DE (1) | DE2816523A1 (en) |
| ES (1) | ES468865A1 (en) |
| FR (1) | FR2387841A1 (en) |
| GB (1) | GB1547092A (en) |
| IT (1) | IT1156964B (en) |
| NL (1) | NL184940C (en) |
| NO (1) | NO147825C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2567857B1 (en) * | 1984-07-19 | 1986-12-26 | Services Equipements | DEVICE FOR CONNECTING A ROTATING TABLE TO A MAIN STRUCTURE, FOR EXAMPLE A TANKER LOADING BUOY |
| GB2191229A (en) * | 1986-03-24 | 1987-12-09 | Subsea Developments Ltd | Offshore hydrocarbon production system |
| NL8602526A (en) * | 1986-10-08 | 1988-05-02 | Single Buoy Moorings | WORK ISLAND, ANCHORED BY TENSION-RELATED EMPLOYERS AND EQUIPPED WITH MEANS FOR MOORING A SHIP. |
| DE4108161A1 (en) * | 1991-03-14 | 1992-09-17 | Muesing Anton Gmbh Co Kg | EXTINGUISHING SYSTEM FOR DELETING THE EXCAVATED GOODS OF AN EXCAVATOR AND A CABINET, preferably as a component of an extinguishing system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3120260A (en) * | 1960-02-26 | 1964-02-04 | Continental Oil Co | Waste gas disposal flare |
| US3557396A (en) * | 1968-11-13 | 1971-01-26 | Mobil Oil Corp | Floating storage system with buoymounted separator |
| FR2029884A5 (en) * | 1969-01-30 | 1970-10-23 | Liautaud Jean | Production storage and bunkering assembly - for an underwater petroleum field |
| AR192712A1 (en) * | 1970-07-08 | 1973-03-14 | Snam Progetti | ANCHORING DEVICE FOR MOORING BUOYS |
| US3807932A (en) * | 1973-04-17 | 1974-04-30 | J Dewald | Method and apparatus for combustion of oil |
| US3880102A (en) * | 1974-02-19 | 1975-04-29 | Offshore Technology Corp | Method and apparatus for offshore submersible oil storage and drilling |
| GB1467800A (en) * | 1974-04-04 | 1977-03-23 | British Petroleum Co | Marine structures |
| US3948196A (en) * | 1975-07-18 | 1976-04-06 | Brown & Root, Inc. | Apparatus for burning fluid at a burner mounted on a floating vessel subject to wave action |
-
1977
- 1977-04-18 GB GB15946/77A patent/GB1547092A/en not_active Expired
-
1978
- 1978-03-06 CA CA298,284A patent/CA1109767A/en not_active Expired
- 1978-04-17 ES ES468865A patent/ES468865A1/en not_active Expired
- 1978-04-17 FR FR7811228A patent/FR2387841A1/en active Granted
- 1978-04-17 NL NLAANVRAGE7804044,A patent/NL184940C/en not_active IP Right Cessation
- 1978-04-17 JP JP53044308A patent/JPS6058119B2/en not_active Expired
- 1978-04-17 AU AU35155/78A patent/AU512066B2/en not_active Expired
- 1978-04-17 DE DE19782816523 patent/DE2816523A1/en active Granted
- 1978-04-17 IT IT6786278A patent/IT1156964B/en active
- 1978-04-17 NO NO781335A patent/NO147825C/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IT7867862A0 (en) | 1978-04-17 |
| FR2387841B1 (en) | 1981-12-04 |
| NO781335L (en) | 1978-10-19 |
| NL184940C (en) | 1989-12-18 |
| AU512066B2 (en) | 1980-09-18 |
| DE2816523C2 (en) | 1989-05-03 |
| NO147825C (en) | 1983-06-22 |
| GB1547092A (en) | 1979-06-06 |
| NL7804044A (en) | 1978-10-20 |
| FR2387841A1 (en) | 1978-11-17 |
| JPS53131522A (en) | 1978-11-16 |
| DE2816523A1 (en) | 1978-10-19 |
| AU3515578A (en) | 1979-10-25 |
| NO147825B (en) | 1983-03-14 |
| JPS6058119B2 (en) | 1985-12-18 |
| ES468865A1 (en) | 1979-09-16 |
| IT1156964B (en) | 1987-02-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |