IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0416490
(2001-11-13)
|
| 등록번호 |
US-8579547
(2013-11-12)
|
| 우선권정보 |
EP-00203969 (2000-11-13) |
| 국제출원번호 |
PCT/EP01/13179
(2001-11-13)
|
| §371/§102 date |
20031027
(20031027)
|
| 국제공개번호 |
WO02/38438
(2002-05-16)
|
|
발명자
/ 주소 |
- Pollack, Jack
- Poldervaart, Leendert
- Naciri, Mamoun
|
| 출원인 / 주소 |
- Single Buoy Moorings Inc.
|
| 대리인 / 주소 |
|
| 인용정보 |
피인용 횟수 :
0 인용 특허 :
33 |
초록
▼
A vessel having an elongated shape, and being moored to the sea bed in a substantially fixed orientation. The vessel includes at least along its longitudinal sides, near keel level, two transverse skirts having such a width that the natural roll period of the vessel is above a predetermined period,
A vessel having an elongated shape, and being moored to the sea bed in a substantially fixed orientation. The vessel includes at least along its longitudinal sides, near keel level, two transverse skirts having such a width that the natural roll period of the vessel is above a predetermined period, the natural roll period of the vessel without the skirts being below the predetermined period.
대표청구항
▼
1. Vessel having an elongate shape, and being moored to the sea bed in a substantially fixed orientation, the vessel comprising: skirts extending along longitudinal sides and shorts sides of said vessel, near keel level, said skirts having such a width that the natural roll period of the vessel is a
1. Vessel having an elongate shape, and being moored to the sea bed in a substantially fixed orientation, the vessel comprising: skirts extending along longitudinal sides and shorts sides of said vessel, near keel level, said skirts having such a width that the natural roll period of the vessel is above a predetermined period, the natural roll period of the vessel without the skirts being below said predetermined period, said skirts are each constructed to provide a volume that displaces water,wherein the vessel is substantially rectangular in shape, the vessel comprising a central well and a drill string and/or riser extending through the well, the vessel being anchored to the sea bed in anchor points situated at a distance from the well on the hull of the vessel in a spread moored manner,wherein a length-to-width ratio of the vessel is at least 2, the skirts having over their length a substantially constant width of at least 5% of the width of the vessel near keel level, and extending over at least 60% of the length of the vessel,wherein a volume of one of said skirts is at least 2% of the total volume of the vessel, andwherein the draft of the vessel is not greater than 30 meters. 2. Vessel according to claim 1, wherein the predetermined period is at least 18 seconds. 3. Vessel according to claim 1, wherein the roll stability of the vessel with the skirts is significantly increased compared to the roll stability of the vessel without the skirts. 4. Vessel according to claim 1, the skirts being substantially horizontal. 5. Vessel according to claim 1, where the vessel is moored to the seabed with mooring lines. 6. Vessel according to claim 1, wherein a deck structure is supported by columns resting on the skirts. 7. The vessel according to claim 1, wherein the skirts extend over 90% of the length of the vessel. 8. The vessel according to claim 1, wherein the skirts extend over substantially an entire length of the vessel. 9. The vessel as claimed in claim 1, further comprising at least two risers extending through the well, said at least two risers being suspended from a supporting structure above the well, said supporting structure being pivotal with respect to a horizontal plane of the vessel. 10. Vessel having an elongated shape, and being moored to the sea bed in a substantially fixed spread moored orientation, the vessel comprising: skirts extending along longitudinal sides and short sides of said vessel, near keel level, said skirts having such a width that the natural roll period of the vessel is above a predetermined period, the natural roll period of the vessel without the skirts being below said predetermined period;a central well, and at least one riser and/or drill string extending through said well to a supporting structure on the vessel, the at least one riser and/or drill string being suspended from the supporting structure above the well, said supporting structure being pivotable with respect to a horizontal plane of the vessel,wherein a volume of one of said skirts is at least 2% of the total volume of the vessel andwherein the skirts are each constructed to provide a volume that displaces water. 11. A vessel comprising: a main body having a substantially rectangular shape with a length-to-width ratio being at least two and being moored to a sea bed in a substantially fixed spread moored orientation; anda single transverse skirt along each respective longitudinal side and along each respective short side of said main body, near keel level, said skirt having such a width that a natural roll period of the vessel is above a predetermined period, the natural roll period of the vessel without the skirts being below said predetermined period, the vessel comprising a central well,wherein the volume of one of said skirts is least 2% of a total volume of the main body, andwherein each said skirt is constructed to provide a volume that displaces water. 12. The vessel according to claim 11, wherein the predetermined period is at least 18 seconds. 13. The vessel according to claim 11, wherein a draft of the vessel is not greater than 30 meters.
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