GB2244463A - Loading/anchoring system for a tanker at an offshore location - Google Patents
Loading/anchoring system for a tanker at an offshore location Download PDFInfo
- Publication number
- GB2244463A GB2244463A GB9107761A GB9107761A GB2244463A GB 2244463 A GB2244463 A GB 2244463A GB 9107761 A GB9107761 A GB 9107761A GB 9107761 A GB9107761 A GB 9107761A GB 2244463 A GB2244463 A GB 2244463A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wires
- anchorage
- tanker
- riser
- hose
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Earth Drilling (AREA)
Abstract
Loading system for a tanker 18 at an offshore location, and comprising a seabed anchorage 11, a buoyant riser support body 12, a plurality of wires 14 securing the body to the anchorage such that the body is held beneath the surface of the water at that location, a plurality of spacers 15 disposed at intervals along the wires to hold the wires laterally apart, a riser hose 16 extending from the vicinity of the anchorage up to the body and constrained by the spacers against lateral movement away from the wires, and a further hose 17 extending from the body to a connection to the tanker, whereby the tanker can weathervane relative to the anchorage. <IMAGE>
Description
LOADING SYSTEM
The invention relates to a loading system for transferring fluids to a tanker at an offshore location.
It is known for tankers to load crude oil from subsea fields at buoyant mooring columns fixed to the seabed. Such columns may have complex articulations at their feet, and loading gantries or yokes above normal sea level. They may also incorporate a complex fluid swivel. These columns have been subject to forces from wind and wave, and have in the past broken away from their designated locations under such environmental loads.
The invention provides a loading system for a tanker at an offshore location, and comprising a seabed anchorage, a buoyant riser support body, a plurality of wires securing the body to the anchorage such that the body is held beneath the surface of water at that location, a plurality of spacers disposed at intervals along the wires to hold the wires laterally apart, a riser hose extending from the vicinity of the anchorage up to the body and constrained by the spacers against lateral movement away from the wires, and a further hose extending from the body to a connection to the tanker, whereby the tanker can weathervane relative to the anchorage.
There may be a plurality of hoses and further hoses.
It is preferred that there are at least three wires, and the riser hose(s) are constrained to adopt a helical path by the spacers disposed at intervals along those wires.
A specific embodiment of this invention will now be described with reference to the accompanying drawing, which is a diagram showing in cross section a tanker loading from a subsea oil field.
As shown in the drawing, a subsea pipeline 10 terminates at a seabed anchorage 11.
At an intermediate water depth above the anchorage 11 there is a buoyant riser support body 12. The body 12 is secured to the anchorage 11 by three wires 14 so that it is held at the intermediate water depth by the wires 14 against its own buoyancy. The wires 14 are held apart by spacers 15.
One or more riser hoses 16 extends up from the anchorage 11 to the body 12. As shown in the drawing the hose(s) 16 can adopt a helical path, and is not itself taut between the anchorage 11 and buoy 12.
A further hose 17 leads from the body 12 to a tanker 18, which is moored to the body 12 by chains 19 supporting the hose 17. The end of the further hose 17 and chains 19 remote from the body 12 is secured to a conventional buoy (not shown) and to a conventional anchor (also not shown) to hold that end of the hose away from the body 12.
In use a tanker can pick up the far end of the further hose 17 and chains 19, and so draw off oil from the subsea oil field through the riser hose 16 and subsea pipeline 10.
This arrangement permits the tanker to weathervane about the anchorage 11 without having to disconnect from the hose 17.
Conveniently a marker buoy 21 is arranged to float above the body 12.
Claims (4)
1. Loading system for a tanker at an offshore location, and comprising a seabed
anchorage, a buoyant riser support body, a plurality of wires securing the
body to the anchorage such that the body is held beneath the surface of the
water at that location, a plurality of spacers disposed at intervals along
the wires to hold the wires laterally apart, a riser hose extending from the
vicinity of the anchorage up to the body and constrained by the spacers
against lateral movement away from the wires, and a further hose extending
from the body to a connection to the tanker, whereby the tanker can
weathervane relative to the anchorage.
2. A loading system as claimed in claim 1 in which there are a plurality of
riser hoses extending from the vicinity of the anchorage up to the body, and
a plurality of further hoses extending from the body to the connection to
the tanker.
3. A loading system as claimed in Claim 1 or claim 2 in which there are at
least three wires, and the riser hose is constrained to adopt a helical path
by the spacers disposed at intervals along those wires.
4. A loading system substantially as hereinbefore described with reference to
and as shown in the accompanying drawing.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB909008675A GB9008675D0 (en) | 1990-04-18 | 1990-04-18 | Loading system |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9107761D0 GB9107761D0 (en) | 1991-05-29 |
GB2244463A true GB2244463A (en) | 1991-12-04 |
Family
ID=10674585
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB909008675A Pending GB9008675D0 (en) | 1990-04-18 | 1990-04-18 | Loading system |
GB9107761A Withdrawn GB2244463A (en) | 1990-04-18 | 1991-04-12 | Loading/anchoring system for a tanker at an offshore location |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB909008675A Pending GB9008675D0 (en) | 1990-04-18 | 1990-04-18 | Loading system |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB9008675D0 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2269619A (en) * | 1992-08-05 | 1994-02-16 | Kvaerner Earl & Wright | Midwater support structures |
WO1996011134A1 (en) * | 1994-10-07 | 1996-04-18 | Single Buoy Moorings Inc. | Submerged calm buoy |
WO1996036528A1 (en) * | 1995-05-16 | 1996-11-21 | Marotec A/S | Device for transferring a fluid |
US5944448A (en) * | 1996-12-18 | 1999-08-31 | Brovig Offshore Asa | Oil field installation with mooring and flowline system |
CN1088023C (en) * | 1994-10-07 | 2002-07-24 | 辛格尔浮筒系船公司 | Submerged calm buoy |
US7040841B2 (en) | 2002-01-30 | 2006-05-09 | Single Buoy Moorings, Inc. | Shallow water riser support |
WO2013027036A1 (en) * | 2011-08-19 | 2013-02-28 | Axis Limited | Mooring system and connector assembly |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3572272A (en) * | 1969-03-05 | 1971-03-23 | Pan American Petroleum Corp | Mooring system using cables and buckled riser pipe |
GB1238542A (en) * | 1967-07-14 | 1971-07-07 | ||
US3708811A (en) * | 1971-01-06 | 1973-01-09 | Exxon Research Engineering Co | Single anchor leg single point mooring system |
US4114393A (en) * | 1977-06-20 | 1978-09-19 | Union Oil Company Of California | Lateral support members for a tension leg platform |
-
1990
- 1990-04-18 GB GB909008675A patent/GB9008675D0/en active Pending
-
1991
- 1991-04-12 GB GB9107761A patent/GB2244463A/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1238542A (en) * | 1967-07-14 | 1971-07-07 | ||
US3572272A (en) * | 1969-03-05 | 1971-03-23 | Pan American Petroleum Corp | Mooring system using cables and buckled riser pipe |
US3708811A (en) * | 1971-01-06 | 1973-01-09 | Exxon Research Engineering Co | Single anchor leg single point mooring system |
US4114393A (en) * | 1977-06-20 | 1978-09-19 | Union Oil Company Of California | Lateral support members for a tension leg platform |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2269619A (en) * | 1992-08-05 | 1994-02-16 | Kvaerner Earl & Wright | Midwater support structures |
WO1996011134A1 (en) * | 1994-10-07 | 1996-04-18 | Single Buoy Moorings Inc. | Submerged calm buoy |
US5816183A (en) * | 1994-10-07 | 1998-10-06 | Single Buoy Moorings Inc. | Submerged CALM buoy |
CN1088023C (en) * | 1994-10-07 | 2002-07-24 | 辛格尔浮筒系船公司 | Submerged calm buoy |
WO1996036528A1 (en) * | 1995-05-16 | 1996-11-21 | Marotec A/S | Device for transferring a fluid |
US5944448A (en) * | 1996-12-18 | 1999-08-31 | Brovig Offshore Asa | Oil field installation with mooring and flowline system |
US7040841B2 (en) | 2002-01-30 | 2006-05-09 | Single Buoy Moorings, Inc. | Shallow water riser support |
WO2013027036A1 (en) * | 2011-08-19 | 2013-02-28 | Axis Limited | Mooring system and connector assembly |
US9032892B2 (en) | 2011-08-19 | 2015-05-19 | Axis Energy Products Ltd. | Mooring system and connector assembly |
Also Published As
Publication number | Publication date |
---|---|
GB9107761D0 (en) | 1991-05-29 |
GB9008675D0 (en) | 1990-06-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
RU2185994C2 (en) | Ship anchoring system | |
US5044297A (en) | Disconnectable mooring system for deep water | |
CA2637832C (en) | Submerged loading system | |
US7993176B2 (en) | Submersible mooring system | |
US20050158126A1 (en) | Flexible riser system | |
US5480264A (en) | Offshore pipeline system | |
GB2295408A (en) | Marine steel catenary riser system | |
US6688348B2 (en) | Submerged flowline termination buoy with direct connection to shuttle tanker | |
GB2239441A (en) | Offshore mooring and loading system | |
CA2325133A1 (en) | Submerged pipeline manifold for offloading mooring buoy and method of installation | |
US20060056918A1 (en) | Riser system connecting two fixed underwater installations to a floating surface unit | |
US7156583B2 (en) | Compensating suspension element configuration | |
US6779949B2 (en) | Device for transferring a fluid between at least two floating supports | |
US6763862B2 (en) | Submerged flowline termination at a single point mooring buoy | |
GB2244463A (en) | Loading/anchoring system for a tanker at an offshore location | |
GB2180809A (en) | Tethered buoyant system | |
US3712260A (en) | Marine terminal mooring | |
US5237948A (en) | Mooring system for oil tanker storage vessel or the like | |
AU2010101544A4 (en) | External Turret With Above Water Connection Point | |
EP1169216B1 (en) | Anchoring system | |
US6685519B1 (en) | System for transferring fluids and methods for installing, modifying and operating system | |
GB2046199A (en) | Offshore terminal | |
GB2390351A (en) | Fluid transfer apparatus | |
JPH08189282A (en) | Sea-bottom huydrocarbon production system,and installation method of sea-bottom source platform for producing hydrocarbon | |
GB2273694A (en) | Offshore loading system. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |