[특허]Spar hull belly strake design and installation method

Technip France

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Spar hull belly strake design and installation method

국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F15D-001/10
미국특허분류(USC)	114/243;
출원번호	US-0147256 (2010-01-28)
등록번호	US-8783198 (2014-07-22)
국제출원번호	PCT/US2010/022364 (2010-01-28)
§371/§102 date	20111209 (20111209)
국제공개번호	WO2010/090942 (2010-08-12)
발명자 / 주소	Luo, Michael Y. H. Mohr, Harvey O. Zhang, Lixin Lambrakos, Kostas Filoktitis
출원인 / 주소	Technip France
대리인 / 주소	Locke Lord LLP
인용정보	피인용 횟수 : 0 인용 특허 : 15

초록
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A spar hull for a floating vessel can include a hard tank having a belly portion, a fixed strake coupled to the outer surface of the tank and a folding strake coupled to the belly portion of the tank, the folding strake having one or more strake panels and one or more support frames. A method for installing folding belly strakes on a spar hull may include providing a floating spar hull having a hard tank with a belly side, rotating the spar so that the belly side is in a first workable position, coupling at least one folding strake to the belly side of the spar, and coupling the strake in a folded position for transport. The method may include positioning the spar hull offshore in a transport position, upending the spar hull, unfolding the strake, fixing the strake in the unfolded position and installing the spar hull.

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1. A spar hull for a floating vessel, comprising: a hard tank having an outer surface, wherein the outer surface has a belly portion;a fixed strake coupled to a first portion of the outer surface of the tank;a folding strake coupled to a second portion of the outer surface of the tank different than the first portion, the folding strake having one or more strake panels configured to be selectively folded toward the outer surface of the tank. 2. The spar hull of claim 1, wherein the first portion does not include the belly portion and the second portion includes the belly portion. 3. The spar hull of claim 1, wherein the one or more strake panels are rotatably coupled to the second portion of the outer surface. 4. The spar hull of claim 1, further comprising a locking structure adapted to lock the one or more strake panels in one or more folded or unfolded positions relative to the outer surface of the tank. 5. The spar hull of claim 1, further comprising a support frame configured to be coupled to the side of the spar and having an unfolded and at least one folded position and configured to support the strake panel when the frame and panel are in the unfolded positions. 6. The spar hull of claim 1, further comprising a support frame fixedly coupled to the outer surface and at least one of the strake panels rotatably coupled to the support frame. 7. The spar hull of claim 1, further comprising a support frame fixedly coupled to the outer surface and forming a portion of the folding strake and at least one of the strake panels rotatably coupled to the support frame, the support frame and the folding strake panel forming a strake surface when the folding strake panel is deployed in an unfolded position. 8. The spar hull of claim 1, wherein the folding strake comprises at least two fixedly coupled support frames and at least two strake panels rotatably coupled to the support frames, and a first strake panel being configured to fold in a first direction along the outer surface of the tank and a second strake panel being configured to fold in a second direction different than the first direction. 9. The spar hull of claim 1, further comprising a coupler having a first portion attached to a first strake panel and a second portion attached to a second strake panel, the coupler configured to couple the first and second strake panels together when the panels are in an unfolded position. 10. A method of utilizing a spar hull for offshore oil and gas operations, comprising: providing a spar hull having a belly strake, wherein at least a portion of the belly strake has at least one folded and unfolded position;fixing the strake in the folded position;positioning the spar hull offshore in a transport position;upending the spar hull;unfolding the strake;fixing the strake in the unfolded position; andpositioning the spar hull in an installed position. 11. The method of claim 10, further comprising installing the belly strake on the spar hull, comprising: rotating the spar hull so that a belly side of the spar hull is in a first workable position;coupling at least one folding strake of the belly strake to the belly side of the spar hull. 12. The method of claim 11, further comprising transporting the spar hull to a work pit prior to rotating the spar to the first workable position and rotating the spar hull to a second position for wet tow. 13. The method of claim 10, wherein the belly strake comprises one or more strake support frames and one or more strake panels and further comprising: fitting the support frames and the strake panels to the spar hull;temporarily removing one or more of the support frames or panels for transport to a location for operations. 14. The method of claim 10, wherein fixing the strake in the folded position comprises: folding a first strake panel in a first direction along the outer surface of the tank; andfolding a second strake panel in a second direction different than the first direction. 15. The method of claim 10, further comprising coupling a first strake panel of the belly strake to a second strake panel of the belly strake at an interface between the strake panels when the strake panels are unfolded. 16. A spar hull for a floating vessel, comprising: a hard tank having an outer surface, wherein the outer surface has a belly portion;a fixed strake coupled to a first portion of the outer surface of the tank, the fixed strake including one or more fixed strake sections extending radially outwardly from the first portion of the outer surface of the tank;a folding strake coupled to a second portion of the outer surface of the tank different than the first portion, the folding strake including at least one folding strake panel configured to be selectively folded toward the outer surface of the tank; anda support configured to couple to the at least one folding strake panel when the at least one folding strake panel is in an unfolded position, the support being configured to at least temporarily retain the at least one folding strake panel in the unfolded position. 17. The spar hull of claim 16, wherein the support is selected from the group consisting of a support frame configured to support the at least one folding strake panel from a side, a support frame configured to form a combined strake surface in conjunction with the at least one folding strake panel, and a combination thereof. 18. The spar hull of claim 16, further comprising a plurality of folding strake panels including at least two adjacent folding strake panels, the at least two adjacent folding strake panels being coupled together with one or more couplers at an interface there between. 19. The spar hull of claim 16, wherein the support further comprises a plurality of support frames configured to support the at least one folding strake panel from one side of the at least one folding strake panel. 20. The spar hull of claim 16, further comprising a hinge coupled to the at least one folding strake panel, wherein the hinge is configured to be at least temporarily locked in one or more positions about a pivot.

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Spar hull belly strake design and installation method

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Spar hull belly strake design and installation method

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