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WO2004067375A1 - Bateau equipe d'un systeme de levage - Google Patents

Bateau equipe d'un systeme de levage Download PDF

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Publication number
WO2004067375A1
WO2004067375A1 PCT/US2003/001646 US0301646W WO2004067375A1 WO 2004067375 A1 WO2004067375 A1 WO 2004067375A1 US 0301646 W US0301646 W US 0301646W WO 2004067375 A1 WO2004067375 A1 WO 2004067375A1
Authority
WO
WIPO (PCT)
Prior art keywords
hull
pads
surface area
lift boat
boat
Prior art date
Application number
PCT/US2003/001646
Other languages
English (en)
Inventor
Benjamin Clay II MOÏSE
Anthony V. Barrois
Original Assignee
Textron Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Textron Inc. filed Critical Textron Inc.
Priority to PCT/US2003/001646 priority Critical patent/WO2004067375A1/fr
Priority to AU2003210573A priority patent/AU2003210573A1/en
Publication of WO2004067375A1 publication Critical patent/WO2004067375A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
    • E02B17/021—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto with relative movement between supporting construction and platform
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/24—Anchors
    • B63B21/26—Anchors securing to bed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0056—Platforms with supporting legs
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0073—Details of sea bottom engaging footing
    • E02B2017/0082—Spudcans, skirts or extended feet

Definitions

  • the present invention relates to lift boats that feature a hull having a plurality of legs, each leg having an associated jacking mechanism that enables the hull to be elevated or lowered relative to the legs and wherein each leg has a load bearing pad that engages the seabed during use. More particularly, the present invention relates to an improved lift boat having an improved leg, hull and pad configuration with improved stability, when jacked up and when underway, featuring port and starboard pads near the bow of the hull that extend laterally of the hull in respective port and starboard directions and that extend into recesses of the hull.
  • Lift boats are well known in the art. These devices (sometimes called jack up barges or jack up rigs) include a floating hull that allows the boat to be transferred from one marine location to another. When the hull reaches a desired location, such as a proposed oil well or other job site, typically three or four legs are lowered from the hull or barge to the sea bed. These legs are then powered downwardly with j acking mechanisms to lift the hull vertically on the legs and above the water's surface. Once in operating position, a jack-up rig presents a stable platform surface for oil and gas well drilling operations, work-over operations, repair or maintenance work etc., notwithstanding the wave action at the water surface below.
  • a jack-up rig presents a stable platform surface for oil and gas well drilling operations, work-over operations, repair or maintenance work etc., notwithstanding the wave action at the water surface below.
  • a piston and cylinder power assembly moves the bars towards the teeth and a retention system engages the bars holding them in engagement with the teeth.
  • the elevating system of the rig co-acts with the set bars to lock the hull and legs together.
  • U.S. Patent No. 5,224,798 entitled "OVERLOADING DEVICE FOR A JACK- UP OIL PLATFORM AND PLATFORM INCLUDING THE DEVICE" (see Figures 4a-4f).
  • a common element of a lift boat is a lifting crane that can be used to lift supplies from its own deck, work boat, supply boat or the like, and place those supplies on the platform.
  • Patents have issued that are directed to the placement of a crane on a jack up barge. Some years ago, a patented crane apparatus was designed to fit over the leg of a smaller sized lift boat wherein the leg was of a cylindrical pipe configuration.
  • 4,417,664 disclosed generally the concept of mounting a crane having a gantry and a boom about the leg of a lift boat.
  • Another patent, that addressed the problem of mounting a crane on a jack-up rig (lift boat) where there is limited space is U.S. Patent No. 4,652,177. This patent proposes to mount the crane on the j acking structure or j acking tower of the j ack-up rig (lift boat) .
  • a lift boat having an improved configuration of hull, legs and pads, including three legs with relatively large pads on the legs which recess partially into the hull of the boat, and which extend partially outwardly and laterally when under way.
  • a portion of at least some of the pads extend laterally (e.g. one pad to port and one pad to starboard) of the hull.
  • the pads extend beyond the periphery of the hull, and can thus be much larger. This greater surface area of pads in contact with the sea floor lessens the likelihood there is that there will be a "punch through" of a leg into the sea floor, which would cause the boat to be unbalanced and possibly fall over. Additionally, these laterally extending pads supplement the aggregate buoyancy of the hull in normal underway operation.
  • the sounding devices can be commercially available sonar devices which tie into the oscilloscope on the boat.
  • the purpose of the unique features of the present invention described herein is to improve the overall efficiency of the lift boat into which they are incorporated in several aspects. These features significantly increased load carrying capacity compared to conventional lift boats. Improved hydrodynamic performance is realized due to the shaping of the hull, the pads, and the beneficial combination of the combined shapes of the hull and forward pads with the pads in the retracted (or 'up') position.
  • the unique lift boat features of the present invention thus include oversized buoyant pads or structural footings attached to the bottom of each leg to support the increased pay load weight the lift boat carries both in the hullborne (hull floating) and 'jacked-up' (legs in the 'down' position placing the pads on the sea-bottom with the lift boat suspended completely above the sea surface) modes.
  • the pads supplement the aggregate buoyancy of the boat in normal underway operation.
  • An improved configuration or shaping of the forward part of the hull and the forward pads form a combined shape having reduced hydrodynamic drag, such that, though having a larger pay load capacity, this lift boat satisfactorily operates with no more propulsion power than conventional lift boats.
  • An improved, beneficial shaping of the hull above the forward pads increases its hydrostatic buoyant volume relative that of conventional lift boats for improved safety and stability.
  • the present invention is an improvement over the methods now being used in the prior art.
  • the laterally extending and thus larger pads provide a larger footing on the sea floor so that down pressure on the sea bottom is reduced from that of current conventional lift boats for improved safety through reduced risk of sea bottom collapse under the pad contact pressure.
  • the larger forward pads are underwater in the normal 'up' position so that their buoyant volume is additive into the total buoyant volume of the boat. In the prior art, the normal practice is for such pads to be suspended above the waterline in the 'up' position).
  • the hull forward end, above and below the waterline, is uniquely shaped to increase its buoyant volume and to provide shaped recesses into which the pads retract in the 'up' position.
  • the resulting aggregate or combined shape is designed for reduced drag compared to the conventional barge-like hull and irregularly immersed pads of a conventional loaded lift boat operating underway in wave conditions.
  • Figure 1 is a side elevation view of the preferred embodiment of the apparatus of the present invention
  • Figure 2 is a top plan view of the preferred embodiment of the apparatus of the present invention
  • Figure 3 is a perspective view illustrating the preferred embodiment of the apparatus of the present invention and showing the underside of the hull and the recess portions that receive the port and starboard pads;
  • Figure 4 is a partial, perspective view of the preferred embodiment of the apparatus of the present invention illustrating the pad portion thereof;
  • Figure 5 is a partial, perspective view of the pad showing an alternate construction for the pad;
  • Figure 6 is a partial, elevation view showing an alternate construction for a forward pad and its recess.
  • FIGs 1-2 show the preferred embodiment of the apparatus of the present invention, designated generally by the numeral 10 in figures 1 and 2.
  • Lift boat 10 has a hull 11 and three legs 12, 13, 14 each having pads 15 , 16, 17 on the legs 12, 13, 14 respectively which recess into the hull 11 of the boat 10.
  • the side pads 15, 16 retract into side recesses 18, 19 in hull 12.
  • the rear pad 17 retracts into rear recess 20 in hull 12.
  • the larger the pads 15-17 that is, the greater the surface area of the pads 15-17 in contact with the sea floor), the less likelihood there is that there will be a "punch through" of a leg 12-14 into the sea floor, which would cause the boat 10 to be unbalanced and possibly fall over.
  • the purpose of the unique features of the present invention described herein is to provide a lift boat 10 of improved configuration, having better overall efficiency.
  • the apparatus 10 of the present invention significantly increased load carrying capacity compared to conventional comparably sized lift boats.
  • the present invention provides improved hydrodynamic performance due to the shaping of the hull 11, the pads 15-17, the beneficial combination of the combined shapes of the hull 11 and forward pads 15-16 with the pads 15-16 in the retracted (or 'up') position (see figures 1 and 6).
  • Pads 15-17 are structural footings attached to the bottom of each leg 12-14 respectively to support the increased pay load weight the lift boat 10 carries both in the hullborne (hull 11 floating) and 'jacked-up' (legs 12-14 in the 'down' position (shown in phantom lines in Figure 3) placing the pads 15, 16, 17 on the sea-bottom with the lift boat hull 11 suspended completely above the sea surface) modes.
  • the forward pads 15- 16 are positioned below the waterline in the 'up' or retracted position to supplement the aggregate buoyancy of the hull 11 in normal underway operation.
  • the present invention is an improvement over the methods now being used in the prior art.
  • the larger pads 15-17 provide a larger footing on the sea floor so that down pressure on the sea bottom is reduced from that of current conventional lift boats for improved safety through reduced risk of sea bottom collapse under the pad contact pressure.
  • the larger forward pads 15, 16 are underwater in the normal 'up' position so that their buoyant volume is additive into the total buoyant volume of the boat 10. The normal practice is for such pads to be suspended above the waterline in the 'up' position.
  • the hull 11 bow end, above and below the waterline, is uniquely shaped (see Figures 1 and 6) to increase its buoyant volume and to provide shaped recesses 18, 19 into which the forward pads 15, 16 respectively retract in the 'up' position.
  • the resulting aggregate or combined shape is designed for reduced drag compared to the conventional barge-like hull and irregularly immersed pads of a conventional loaded lift boat operating underway in wave conditions.
  • Deck house 23 rests on and is secured to deck 21 of hull 11.
  • Deck 21 also holds and supports crane 22 having cab 24, crane support 25 and boom 26.
  • Crane 22 also includes gantry 28 and rigging 29.
  • crane 22 support 25 is positioned generally in between legs 12 and 13 as shown in Figure 2.
  • Deck house 23 is positioned at the stern of hull 11, next to leg 14 as shown in Figure 2.
  • Boom 26 can extend substantially the full length of hull 11, extending to one side of deck house 23 when boom 26 is lowered (see Figure 2).
  • Hull 11 is preferably wider fore than aft, and includes forward recesses 18, 19 for receiving the forward pads 15, 16 respectively.
  • a rear recess 20 receives the rear pad.
  • Forward recesses 18, 19 extend inward from the sides of the hull 11 and are preferably only slightly larger laterally than necessary to receive the portion of forward pads 15, 16 which are positioned below them when the lift boat 10 is jacked up.
  • Pads 15, 16 taper in an aft direction to provide as little water resistance as possible.
  • Figures 1 , 3 and 4-6 show more specifically the configuration of each of the pads 15, 16 that fit the respective recesses 18, 19 at the port and starboard portions of the bow of hull 11 as shown in the drawings.
  • the preferred construction for pad 15 is shown.
  • the construction of pad 16 is preferably the same as the construction shown in Figure 4 for pad 15.
  • the construction of pad 17 can be the same as for the pad 15 shown in Figure 4.
  • Figure 5 shows an alternate construction for the pads 15, 16, the pad in Figure 5 being designated generally by the numeral 15 A. It should be understood that the pad 15A can be used as a substitute for the pads 15, 16, especially when coupled with the hull shape provided at recess 56 as shown in Figure 6.
  • pad 15 has upper surface 34, generally vertical, flat sides 35, 36 and front and rear substantially vertical surfaces 37, 38.
  • the bottom of each of the pads 15, 16 provides an inclined bottom surface 39 at the front of the pad 15 or 16 and an inclined surface 40 at the rear of the pad 15 or 16.
  • Horizontal bottom surface 41 can be provided in between the inclined surfaces 39, 40.
  • hull 11 provides at recess 19 (and also for recess 18) a horizontal surface 42 that receives the upper surface 34 of pad 15 as shown in Figure 1.
  • the portion of pad 15 that is contained within recess 19 contacts the hull 11 as shown in Figure 1.
  • a portion of the upper surface 34 of pads 15 and 16 fits against the generally flat, horizontal surface 42 of hull 11 at recesses 18 and 19.
  • Aft inclined surface 43 extends from rear vertical surface 38 of pad 15 or 16 and also from the rear end of horizontal surface 42.
  • Each recess 18, 19 also includes a vertical surface 44.
  • an innermost side of each pad 15, 16 fits closely against vertical surface 44 of hull 11 at a recess 18 or 19.
  • the side 36 of pad 16 fits closely against the vertical surface 44 of hull 11 at recess 19.
  • the front rake portion of hull 11 is shown in Figures 1 and 3.
  • Recesses 18, 19 are open at rake 45 as shown so that the bottom of each pad 15, 16 at surface 39 (or 53 of pad 15 A) meets the water surface as the hull 121 travels in a forward direction.
  • Pad 15A is similar to pad 15 shown in Figure 4, differing in that its upper surface has the same general configuration as its undersurface. Thus, pad 15A has a front upper inclined surface 46, rear upper inclined surface 47, and upper horizontal surface 48 in between the surfaces 46 and 47. As with pads 15 and 16, pad 15A has generally vertical sides 49, 50, a forward vertical surface 51 and a rear vertical surface 52.
  • the bottom of pad 15A has the same general bottom configuration as the pad 15 or 16 shown in Figure 4.
  • pad 15 A has a forward, inclined bottom surface 53, aft inclined bottom surface 54, and horizontal bottom surface 55 that is in between the surfaces 53 and 54.
  • the pad 15A fits an alternate construction of recess 56 that is shown in Figure 6.
  • the recess 56 has vertical surface 57, aft curved hull surface 58, and surfaces that engage the upper surfaces of pad 15 A, including forward inclined hull surface 59, rear inclined hull surface 60, and horizontal hull surface 61.
  • recess 56 is open at rake 45 so that the inclined surface 53 meets the water surface as the hull travels in a forward direction.
  • Rear recess 20 extends laterally from one side of the hull to the other. Adjacent and fore of the rear recess 20 is a recess 31 for propellers 30 and rudders 32.
  • Portions of the pads 15, 16 (or 15 A) extend laterally outward from the hull 11 as shown in Figure 2. This construction helps to stabilize the lift boat 10 both when the boat 10 is underway and when the hull 11 is jacked up, as it increases the effective surface area of the lift boat 10 by the amount that the pads extend outward makes the pads further away from the center of gravity of the boat than in conventional lift barges.
  • the total bottom surface area of the pads 15-17 is preferably at least 30% of the surface area of the deck 21 of the lift boat hull 11, more preferably at least 35% of the surface area of the deck 21 of the lift boat hull 11 , and most preferably at least 50% of the surface area of the deck
  • each pad would have about the same surface area as every other such pad.
  • the total bottom surface area of the pads 15- 17 is large enough such that, when the boat 10 is loaded to capacity and hull 11 is jacked up, the pads 15-17 exert pressure of less than 7 p.s.i. (48.28 Pa) on the sea floor, more preferably less than 6 p.s.i.(41.38 Pa), and most preferably less than 5 p.s.i. (34.48 Pa).
  • each leg 12-14 There is preferably also included a sounding device (not shown) in the bottom of each leg 12-14 (and preferably located in the bottom of the pads 15 - 17) to assess the thickness of the crust of the sea floor.
  • the sounding devices can be commercially available sonar devices which tie into the oscilloscope (not shown) on the boat 10.
  • buoyant means buoyant in the water in which the lift boat operates. All measurements disclosed herein are at standard temperature and pressure, at sea level on Earth, unless indicated otherwise. All materials used or intended to be used in a human being are biocompatible, unless indicated otherwise.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Underground Or Underwater Handling Of Building Materials (AREA)

Abstract

L'invention concerne un bateau (10) à système de levage amélioré comprenant une coque (11), une pluralité de pieds (12, 13, 14) (de préférence trois), une pluralité de patins (15, 15A, 16, 17), chaque patin étant fixé à chaque pied, et un mécanisme de levage destiné à monter et à descendre chacun d'eux. Des évidements dans la coque reçoivent les patins lorsque le bateau à système de levage est en route. La zone de surface inférieure totale des patins représente, de préférence, au moins 30% de la zone de surface du pont du bateau à système de levage. La zone de surface inférieure totale des patins est, de préférence, assez grande, de manière que lorsque le bateau est chargé à capacité maximale et levé, les patins exercent une pression inférieure à 7 p.s.i. (48,28 Pa) sur le fond marin. Les patins sont, de préférence, évidés dans la coque, et s'étendent latéralement à l'extérieur de la coque lorsque le bateau est en route, de manière à conférer une plus grande stabilité au bateau à système de levage lorsque celui-ci est en route.
PCT/US2003/001646 2003-01-17 2003-01-17 Bateau equipe d'un systeme de levage WO2004067375A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US2003/001646 WO2004067375A1 (fr) 2003-01-17 2003-01-17 Bateau equipe d'un systeme de levage
AU2003210573A AU2003210573A1 (en) 2003-01-17 2003-01-17 Lift boat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2003/001646 WO2004067375A1 (fr) 2003-01-17 2003-01-17 Bateau equipe d'un systeme de levage

Publications (1)

Publication Number Publication Date
WO2004067375A1 true WO2004067375A1 (fr) 2004-08-12

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ID=32823150

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/001646 WO2004067375A1 (fr) 2003-01-17 2003-01-17 Bateau equipe d'un systeme de levage

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AU (1) AU2003210573A1 (fr)
WO (1) WO2004067375A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013104377A1 (de) * 2013-04-30 2014-10-30 Rolf Rohden Hubwasserfahrzeug mit einem Vorschiff und einem Hauptschiff
CN108163152A (zh) * 2018-02-06 2018-06-15 浙江华蕴海洋工程技术服务有限公司 自升式风电机组安装平台
CN111391989A (zh) * 2020-04-24 2020-07-10 交通运输部上海打捞局 一种坐底自升式多功能打捞工程船
US11142290B2 (en) 2016-10-18 2021-10-12 Ulstein Design & Solutions B.V. Self-propelled jack-up vessel

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2308743A (en) * 1939-09-16 1943-01-19 William P Bulkley Barge
US2334992A (en) * 1940-10-08 1943-11-23 Shell Dev Floating drilling barge
US2927436A (en) * 1954-04-23 1960-03-08 California Research Corp Method of operating an elevated deck drill barge
US3628336A (en) * 1969-04-28 1971-12-21 Offshore Co Drilling platform
US3872679A (en) * 1973-12-21 1975-03-25 Chevron Res Apparatus and method for reducing the forces on extendible legs of a floating vessel
US4483644A (en) * 1982-09-15 1984-11-20 Johnson Thomas P Cantilevered mobile marine rig with hydraulic load equalizer
US5188484A (en) * 1991-05-13 1993-02-23 Self Installing Platforms, Inc. Jack-up type offshore oil and gas production platform and method
US5190410A (en) * 1990-10-31 1993-03-02 Nunley Dwight S Conversion of mat jack-up drilling platforms to floating drilling platforms

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2308743A (en) * 1939-09-16 1943-01-19 William P Bulkley Barge
US2334992A (en) * 1940-10-08 1943-11-23 Shell Dev Floating drilling barge
US2927436A (en) * 1954-04-23 1960-03-08 California Research Corp Method of operating an elevated deck drill barge
US3628336A (en) * 1969-04-28 1971-12-21 Offshore Co Drilling platform
US3872679A (en) * 1973-12-21 1975-03-25 Chevron Res Apparatus and method for reducing the forces on extendible legs of a floating vessel
US4483644A (en) * 1982-09-15 1984-11-20 Johnson Thomas P Cantilevered mobile marine rig with hydraulic load equalizer
US5190410A (en) * 1990-10-31 1993-03-02 Nunley Dwight S Conversion of mat jack-up drilling platforms to floating drilling platforms
US5188484A (en) * 1991-05-13 1993-02-23 Self Installing Platforms, Inc. Jack-up type offshore oil and gas production platform and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013104377A1 (de) * 2013-04-30 2014-10-30 Rolf Rohden Hubwasserfahrzeug mit einem Vorschiff und einem Hauptschiff
US11142290B2 (en) 2016-10-18 2021-10-12 Ulstein Design & Solutions B.V. Self-propelled jack-up vessel
CN108163152A (zh) * 2018-02-06 2018-06-15 浙江华蕴海洋工程技术服务有限公司 自升式风电机组安装平台
CN111391989A (zh) * 2020-04-24 2020-07-10 交通运输部上海打捞局 一种坐底自升式多功能打捞工程船
CN111391989B (zh) * 2020-04-24 2024-12-31 交通运输部上海打捞局 一种坐底自升式多功能打捞工程船

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