Floating platform and method of assembly
(57) Abstract:The invention relates to shipbuilding, in particular, to the design of a floating platform and the way it build. Floating platform contains half-submerged in the water vessel having at least two pontoons, floating columns extending upward from these pontoons, deck, supported on columns, and a raft containing housing part and at least two floating caisson located on the lateral edges of the raft or near them. Floating caissons installed slightly above the top surface of the hull than the vertical sediment pontoons semisubmersibles in his condition without ballast. The vessel pontoons rigidly attached to the upper surface of the hull of the raft. Way to build a floating platform is that is filled with ballast raft so that the upper surface of its hull sank to a depth of greater precipitation vessel without ballast. Have the vessel above the Cabinet part of the raft and between separate floating caissons from the side edges of the raft. Remove the ballast from the raft so that the pontoons of the ship rose above the water level. Then rigidly securing the vessel to the upper surface of the hull dps is aceveda storing oil in place in the open sea. 2 C. and 8 C.p. f-crystals, 4 Il. The present invention relates to a floating platform and / ways to build such a platform.In particular, the invention relates to a floating platform, formed from an existing vessel, half-submerged in the water, and attached to the upper surface of the raft, specially made for this purpose.Half-court use for several years in the development of mineral resources in the open sea for drilling, production and work in the open sea.From the United Kingdom patent N 2068439A famous floating platform, long-term fixed in the open sea and is intended for use as a floating production installation that contains the half-submerged vessel having two pontoons, floating columns extending upward from these pontoons, deck, supported on columns. In U.S. patent No. 4 167 148 disclosed a method of assembling a floating platform, which consists in liberation from the ballast semisubmersibles so that it floated on its pontoons.When transporting the vessel is released from the ballast so that it could float on pontoons with columns above the water. This allows the ship ω thus, to the pontoons are submerged, and only the floating columns were above the water surface, thus enabling the vessel substantial buoyancy with a small area of the plane of the waterline.This design creates a more stable platform for operations in the open sea, than could be achieved for ordinary ships ship type. However, in the case of severe weather conditions, even partly submerged vessel is subjected to displacements which are unacceptable to perform work in the open sea including drilling and production. This leads to "downtime" during which all the operating costs of the semisubmersibles accumulate, but useful work is being performed.Economic development of offshore oil and gas fields in areas with severe weather conditions leading to the need for drilling, production and other activities in the open sea with a gradual penetration into the sea with more severe conditions by minimizing downtime.From the author's certificate USSR N 1303486 known dual raft with ballast, with platform, used as a lifting device for the Assembly or repair of emergent drill the second floating structure. This raft platform have under half-submerged drilling rig and then from it to remove the ballast to raise this emergent installation above the water for the Assembly or repair. This combined device set using anchor chain, located directly on the half-submerged drilling rig. This design has the disadvantage that the work can only be performed in the absence of any sea state for a limited period of time. Therefore, the combination of half-submerged drilling rig and managed floating structure disclosed in the author's certificate of the USSR N 1303486, is unsuitable as a permanent floating production units are located in a geographical area with harsh weather conditions in the open sea.The technical result of the present invention is the creation of a stable floating platform, capable of a long time to work under more severe weather conditions in the open sea, than currently used, partly submerged vessels, providing the ability to store oil in place in the open sea, additional buoyancy to accommodate the additional equipment the technical result is achieved by in a floating platform, long-term fixed in the open sea, and intended for use as a floating production installation that contains the half-submerged vessel having at least two pontoons, floating columns extending upward from these pontoons, deck, supported on columns, according to the invention, has a managed floating design, which is located under the semisubmerged ship, able to lift this ship and represents the raft containing housing part having a platform large platform priporoshennaja vessel, and at least two separate floating caisson, located on the lateral edges of the raft or near them, and floating caissons installed slightly above the top surface of the hull than the vertical sediment pontoons semisubmersibles in his condition without ballast and the vessel pontoons rigidly attached to the upper surface of the hull of the raft with the possibility of formation of a combination of semisubmersibles and managed floating structure of a permanent production installation for operation in open sea.Preferably, the basic part of the raft had' compartments for storage of oil and texts or remove oil from the raft.It is advisable that the two adjacent floating caisson raft passed up to the level above sea level and were adapted for the location of additional deck space, connected to the deck semisubmersibles.Preferably, the caissons had mooring equipment to secure the platform in place. This mooring equipment may contain a number of mooring ropes, which can be unwound from pontoons or vertical strained leash, which can be unwound from the caissons.It is possible to raft contained equipment dynamic positioning.Preferably, one or both of the upper and lower surfaces of the raft were tilted up or down from the edge of the raft to its centre.It is desirable that the peripheral edge of the raft were shaped to reduce drag wave and/or loads.The above technical result is achieved by the fact that in the method of assembling a floating platform, which consists in liberation from the ballast semisubmersibles so that it floated on its pontoons, according to the invention, filled with ballast managed floating structure, containing a raft, so Ob, have the vessel above the Cabinet part of the raft and between separate floating caissons from the side edges of the raft, remove the ballast from the raft so that the pontoons of the ship rose above the water level, and then rigidly securing the vessel to the upper surface of the hull of the raft.Below are described two variants of implementation of the present invention with reference to the accompanying drawings, in which:
Fig. 1 is a side view of the floating platform according to the invention;
Fig. 2 represents an end view of the platform shown in Fig. 1;
Fig. 3 is a side view of another floating platform, according to the invention;
Fig. 4 represents an end view of the platform shown in Fig. 3
As shown in figure 1, the floating platform contains the usual half-submerged drilling vessel, which is often referred to in the industry of Mobile Coastal Drilling rig (SFDR). This SFDR has two elongated pontoon 1, eight floating columns 2, extending upward from these pontoons 1, the deck 3, supported on the columns 2. The pontoons 1 are separated inside able to be filled with ballast on the choice of waterproof compartments. SFDR is in the corner columns 2 boxes for anchor chains, winches 4 ve on the value of the anchor groups.Shown as an example SFDR actually is a half-submerged drilling vessel in the series SEDCO 700, approximately fifteen pieces which have been used worldwide for various operational purposes at the time of writing this proposal.In accordance with the present invention SFDR attached to manufactured for special purposes raft 6. Raft 6 typically has a housing part 7 with a rectangular platform, the size of which is larger than the SFDR. Body part 7 in the corners has caissons 8, which is located slightly above the top surface of the hull 7 than vertical sediment pontoons 1 SFDR when they are released from the ballast condition.In the simplest embodiment, the SFDR is fixed to the upper surface of the hull 7 between the four corner pockets 8. In this way, the raft 6 provides additional buoyancy installation SFDR, and also improves the stability characteristics SFDR. Mount the Jack up to the raft reduces applied to the SFDR wave loads, which largely sees itself raft. Thus greatly reduces fatigue, acting in the structural elements of the SFDR.Raft 6 may have a Central bore shaft 9, through which may pass to the sea floor system 10 rigid or flexible vertical tubes, as shown in particular in figure 2. In this case, you want the floating platform remained in place over the support plate for drilling or production manifold 11.The drawings show two alternative ways of retaining the platform is 13 deployed installing SFDR with winches 4 through the guide blocks 5 and then through an additional guide blocks 12, located on the upper parts of the caissons 8. These mooring ropes 13 come in the form of a series of eight or twelve anchor Svetov (not shown).The second way of holding the platform in place it is held under the action of its own buoyancy way platform with supports tension. In this case, the tether 14 (shown in solid lines) go down from devices 15 tension, installed behind the caissons 8 to the support plates 16 for drilling Foundation tethered to the seabed.The third way of holding the platform in place (not shown) platform supply equipment dynamic positioning so that are no unnecessary mooring ropes 13, no leash 14.By changing the configuration of the raft body part 7 can be slightly convex (as shown by the dotted lines in figure 1 ), so that its residue in the center is less than sediment on its periphery. In the case of convex raft platform stands on the waves better, and so it will require less air gap between the nominal sea level and the lowest elements of the deck.Regarding the design and build of the platform, it should be noted, Thu the social goals raft 6 is a simple design, and it can build sections on a regular shipyard and then build on protected water. Alternatively, the raft can be made of concrete method of manufacturing a basis for concrete offshore gravity based. Using the usual technique of shipbuilding or concrete placement, it is very economical to construct and assemble the raft (with internal compartments for the storage of petroleum).The method of Assembly described above, the floating platform is as follows. The float 6 is filled with ballast, so that the upper surface of its hull 7 sank to a depth of more precipitation SFDR without ballast, have SFDR over the carcass part 7 of the float 6 and between separate floating caissons 8 from the side edges of the float 6. Then remove the ballast from the raft b so that the pontoons 1 SFDR raised above the water level, and then rigidly securing the Jack up to the upper surface of the hull 7 float 6.In figures 3 and 4 shows a second variant implementation of the present invention, while the SFDR is shown on the raft 17. This requires additional manufacturing equipment for which the SFDR is no place on the deck. To meet this TMIB an element 19 and the fasteners 20 and support additional deck area 21, connected to the deck semisubmersibles 22. For additional deck space 21 can be mounted, additional operating elements 23 and the signal arrow 24.Shown in figures 3 and 4 embodiment, the float 17 is designed in such a way as to provide buoyancy and support for additional deck space 21 near one caisson SFDR. If necessary, additional deck area can be formed also on the other end of the Jack up, as shown by dashed lines.You can make many changes in the framework of the present invention. As mentioned above, the raft can also be made of concrete. This may be the preferred option for a semi-submersible platform, made of steel. Theoretically, with a raft of course, you can combine the semi-submersible platform made of concrete. The most profitable and the best solution would be to merge able to swim platform with steel columns and concrete raft.Hereinafter referred to as pontoon platforms you can use a separate pontoons or buoyancy compartments or they can be combined circular or rectangular single housing or housing other suitable form. Case modit to accommodate the platform sites with columns. Thus, it can also be designed in the form of annular raft with a hole is round, oval or rectangular shape in the Central part. The location for columns a floating platform on a raft you can also prepare a special way for this purpose and adapted for mounting pillars of the platform. 1. Floating platform, long-term fixed in the open sea and is intended for use as a floating production installation that contains the half-submerged vessel having at least two pontoons, floating columns extending upward from these pontoons, deck, supported on columns, characterized in that it has managed floating structure located under the semisubmerged ship, able to lift this ship and represents the raft containing housing part having a platform, a large platform semisubmersibles, and at least two separate floating caisson located on the lateral edges of the raft or near them, and floating caissons installed slightly above the top surface of the hull than the vertical sediment pontoons semisubmersibles in his condition without ballast, and the pontoons the vessel is pogruzhennogo ship and managed floating structure of a permanent production installation for operation in open sea.2. Floating platform under item 1, characterized in that the body part of the raft has compartments for storage of oil and it provides a means for flooding compartments opposite side to compensate for the accumulation or removal of oil from the raft.3. Floating platform under item 1 or 2, characterized in that two adjacent floating caisson raft held up to the level above sea level and adjusted for the location of additional deck space, connected to the deck semisubmersibles.4. Floating platform according to any one of paragraphs.1 to 3, characterized in that the caissons are mooring equipment to secure the platform in place.5. Floating platform on p. 4, characterized in that the mooring equipment contains a number of mooring ropes, which can be unwound from the caissons.6. Floating platform on p. 4, characterized in that the mooring equipment includes vertical strained leash, which can be unwound from the caissons.7. Floating platform according to any one of paragraphs.1 - 6, characterized in that the raft contains equipment dynamic positioning.8. Floating platform according to any one of paragraphs.1 to 7, characterized in that one or tea platform according to any one of paragraphs.1 - 8, characterized in that the peripheral edges tightly shaped to reduce drag wave and/or loads.10. Way to build a floating platform, which consists in liberation from the ballast semisubmersibles so that it floated on its pontoons, characterized in that the fill ballast managed floating structure, containing a raft, so that the upper surface of its hull sank to a depth of greater precipitation vessel without ballast, have the vessel above the Cabinet part of the raft and between separate floating caissons from the side edges of the raft, remove the ballast from the raft so that the pontoons of the ship rose above the water level, and then rigidly securing the vessel to the upper surface of the hull of the raft.
FIELD: shipbuilding; manufacture of mobile research complexes.
SUBSTANCE: proposed complex is made in form of ship with small waterplane area having upper and lower hulls interconnected by means of telescopic columns for disconnection and autonomous motion of these hulls. Lower hull is submersible vehicle and upper hull is amphibian. Both hulls are provided with greenhouses and power units for generation of energy for motion of complex, domestic and technological purposes, as well as for growing vegetables, sea products and production of distilling water by motion of spheres with plant containers located spirally on their surfaces, thus ensuring generation of electric power. In addition to vegetation tubes with plants growing chains are provided where sea products are contained for distilling sea water by change in pressure and level of illumination and growing chains for growing fish and preparation of nutrient solution for plants. Lower hull is provided with plankton trawls for delivery of plankton for greenhouse and power plants of lower and upper hulls for growing fish and sea products. Amphibian supplies fresh air to submersible vehicle through its collector; it is also used for transportation of sections for erection of scientific research station. Provision is made for delivery of light to submersible vehicle through lenses, light conduits and structural sections and light conduits of collector of vehicle.
EFFECT: environment control.
4 cl, 22 dwg
FIELD: well drilling and hydrocarbon production equipment; performing operations in running underwater wells.
SUBSTANCE: tanker carries equipment on its deck for performing operations in underwater well which is dynamically positioned above subsea riser running from underwater well. Equipment is connected with subsea riser for performing non-rotary drilling at reduced hydrostatic pressure in well bore. Multi-phase mixture thus formed is divided on tanker and separated liquid hydrocarbons are stored in tanker storage tanks. Equipment for performing operations in underwater well may be mounted on superstructure above main deck. Equipment for non-rotary drilling in well bore at reduced hydrostatic pressure may be provided with spooled tubes and may be mounted near drill ship well located above subsea riser of well to which said equipment is to be connected or near mobile platform which may be shifted to outside position above subsea riser of well.
EFFECT: possibility of performing drilling operations without putting well out of operation.
5 cl, 5 dwg
FIELD: electric power engineering; windmill power generating plants.
SUBSTANCE: proposed floating coastal wind-operated truss is made in form of multi-link floating semi-submersible detachable structure forming one extended chain. One link consists of truss-pontoon (1) formed by two polygonal figures-pontoons (2,2') and tetragonal figure-pontoon (5-6-5'-6'). In vertices of figures (2,2'), in separate points of longer sides of figure (5-6-5'-6') and in their centers there are angular (3,3'), linear (7) and central (8,8') displacement-type truncated pyramids-floats with their vertices downward. They are connected with one another by means of hollow radial (10), bracing and inter-brace stiffening members. Mounted on angular (3,3') and linear (7) pyramids-floats on bearing shoes (20) of wind-operated turbine (21) are rotating electrical generators. Above-water platform with superstructure is supported by stiffening members and pyramid-float of figure (5-6-5'-6') by means of cylindrical supports. Arranged in pyramids-floats (8,8') and in their hermetic recesses and in superstructure is technological equipment connected with shore power system by means of underwater cable. Submergence of truss-pontoon (1) is performed by admitting sea water into ballast cavities of pyramids-floats (3,3', 7, 8, 8') through their kingston valves by gravity. For surfacing of truss-pontoon (1), use is made of ballast drainage system which consists of drainage pumps of pyramids-floats (8,8'), drainage ejectors of pyramid-floats (3,3' and 7) of discharge kingston valves and connecting pipe lines with fittings. For positioning the wind-operated truss and weighing the anchor, use is made of windlasses with anchor sprockets mounted on deck of each linear (7) and angular (3,3') pyramid-float in hermetic recess. Hermetic cavities of all pyramids-floats (3,3',7,8,8') are brought into communication through hollow stiffening members and internal hatches, access holes and apertures.
EFFECT: increased total power of plant; improved operating characteristics and maintainability.
3 cl, 12 dwg
FIELD: floating platforms for marine structures and raising of sunken vessels.
SUBSTANCE: proposed floating platform has floating hull with engine and propulsion plant and cargo-hoisting equipment and at least one self-contained lower module which is made in form of submarine and is rigidly connected with floating hull by means of joint complex including longitudinal slot made in floating hull bottom; said module is received by this slot; joint complex is also provided with articulation grips and diagonal rods with attachment unit for securing to floating hull and to module. Floating hull is reinforced by longitudinal and transversal arch-shaped structures located on its deck and provided with watertight bearing struts.
EFFECT: extended functional capabilities; enhanced efficiency.
FIELD: polar stations adaptable for extended drift in waters coated with ice cover.
SUBSTANCE: proposed drifting station has cylindrical hull with transformable domestic compartment with dome-shaped roof located above upper surface of ice and ballast reservoir located in under-ice part of hull. Located between domestic compartment and ballast reservoir in center portion of station hull are bio-energetic unit and rigidity ring made from interconnected reactors filled with water. Compartments of station are interconnected by means of lift trunk.
EFFECT: enhanced endurance; protracted time of operation of drifting station in autonomous mode.
6 cl, 6 dwg
FIELD: shipbuilding; building of pontoon ferries.
SUBSTANCE: proposed water craft consists of pontoons fastened together. Pontoons are provided with screen framework secured on hull along water surface embracing the bottom portion of hull. Part of framework is made in form of sections of pyramidal form.
EFFECT: enhanced operational reliability in winter periods.
FIELD: shipbuilding; building of floating structures.
SUBSTANCE: proposed floating structure has hull with supporting bearing mounted in its outer recess; this bearing is connected with supporting piles by means of chains. Displacement part of structure hull is divided by inner radial bulkheads; mounted on one of these bulkheads is engine whose shaft with propeller is brought out to open recess. Besides that, floating structure is provided with flying bridge and floating landing stage.
EFFECT: possibility of forming mobile floating structure rotating around its axis.
4 cl, 10 dwg
FIELD: shipbuilding; building floating structures, restaurants, for example.
SUBSTANCE: proposed floating structure includes round hull, decks, deck structure, pillars supporting second deck and roof. Floating structure has two identical halves interconnected in round hull. Lower round parts of floating structure is provided with port lights located above waterline. Identical halves have radial circular watertight bulkheads and watertight doors. Bottoms of each half have mating symmetrical half-bowls located in central part on the outer side and separated by spacer laid between them. Said half-bowls have blind threaded holes for securing plate with supporting bearing and chains holding the structure center in required point of water basin. Mating halves of floating structure have threaded holes with diameter exceeding diameter of fastening bolts; they are provided with double amount of watertight threaded plugs; thread of plugs correspond to thread of holes in structure halves. Pillars supporting the second deck and roof are provided with casings with unfolding curtains and locks securing them to decks.
EFFECT: reduction of scope of assembly jobs; possibility of towing floating structure through sea locks.
2 cl, 10 dwg
FIELD: drilling, particularly underwater drilling.
SUBSTANCE: method involves towing and installing floated support hollow structure so that barge passes in the support structure and provides drilling, wherein the support structure is located below water surface to provide barge having pontoons passage over the structure and the structure is provided with at least four posts with conical tips located out of structure contour so that the conical tips project above water surface; mounting derrick on the barge provided with remote holders with orifices spaced apart a distance equal to corresponding distances between above posts; directing the barge relative the support structure by aligning holder orifices with posts; filling pontoons with water to put the barge on the support structure; lifting barge with derrick by removing water from pontoons after drilling operation finishing so that holders are separated from the posts and removing the barge out of the support structure; arranging another barge provided with production equipment, pontoons and remote holders with orifices over the support structure and putting the barge on the support structure.
EFFECT: extended functional capabilities.
4 cl, 7 dwg
FIELD: drilling technology; marine drilling plants for drilling and production of oil and gas in coastal shelf.
SUBSTANCE: proposed marine drilling complex includes group of floating modules with pontoons and portal with drilling unit and tower and connecting lines. One module is movable and may be towed and coupled with other modules in turn which are stationary in their construction and are provided with well for drilling holes; portal with drilling unit and tower with connecting lines, living module, power unit, production equipment with storehouses and hinged bridge are mounted on movable module. Modules and bridge are provided with rail tracks which may be connected for motion of portal with drilling unit from movable module to stationary one.
EFFECT: enhanced economical efficiency of marine drilling complex.
7 cl, 7 dwg