Underwater rig for development of hydrocarbons (oil and gas) deposits in arctic shelf

FIELD: oil-and-gas industry.

SUBSTANCE: underwater rig comprises two submarines, one making deep-water drilling complex. Said complex consists of two modules, one making process module for executing the entire cycle of well construction and another one making the drilling module. Second submarine represents a nuclear underwater power production complex. Process module comprises drilling module supercharging system, storage battery compartment connected with cable joint. Process module top section is equipped with float emergency chamber with docking assemblies and self-propelled submarine while bottom section is provided with lock chamber with lifter. Drilling module is arranged vertically relative to process module and connected therewith by pipeline and power cables. Drill rig with hydraulic drive is arranged at drilling module centre. Bottom thrust plate, set of preventers, drill tool are arranged in drilling g module axial plane while pipe feed and making-up automatic device is arranged on opposite side.

EFFECT: higher efficiency.

4 dwg

 

The invention relates to shipbuilding and mining, in particular the complexes of the commercial development of oil and gas fields on the Arctic shelf in difficult meteorological conditions. Famous underwater drilling platform (See patent RU №2108264, CL VV 35/44)designed for production drilling on the bottom of seas and oceans, made in the form of a submarine with a light body and a solid body placed in it functional equipment for the life of the people, as well as with the drilling equipment. It also has to be installed on the ground the open bottom of the shell, made in the form of half or hemisphere, these durable case made in the form of longitudinally spaced cylindrical shells and vertically located in the Central part of the body solid cylindrical compartment for drill stem and placing the stock pipes, and an open bottom shell located under the bottom of the solid cylindrical compartment, made with the camera of suction, and connected to it through a camera suction and executed in this shell coaming platforms and systems passageways with lids for access drilling tool to the ground when open these covers. A disadvantage of the known underwater drilling platform is a complex technology razrabotannoi design and that the drilling rig is equipped with installed on the ground the open bottom of the shell, which does not provide reliable sealing of the passage of the drill rod. To drain the shell is not possible because of its large size. To install a submarine on the envelope dangerous.

Also known technological complex underwater mining of minerals (See patent RU No. 2140516, CL EV 7/12, 33/035, 43/01)containing bottom support plate with wellhead connectors, main riser means in the form of isolated from other compartments underwater drilling with operational and drilling equipment, with the possibility tight connection with the wellhead connectors. The bottom base plate is supplied mounted on respective rails technological trolley with intermediate riser means for drilling wells under the direction and under development drilling, each of which has an alternate quick-tight connection with the compartment of the rotor Assembly and lifting equipment systems and wellhead connectors.

Technological complex includes scuba supply vessel with mobile modules supply consumables underwater drilling and underwater drilling vessel equipped with a system which dinamicheskogo positioning relative to the vessel bottom support plate, including at least one retractable wheel and one pull-out swivel column with the propeller, as well as centering elements on the body, intended to interact with corresponding mating elements supporting farm bottom of the base plate. Compartment of the rotor Assembly and lifting underwater drilling system equipped with a universal and rotating preventer to ensure sealing its premises and technology communications among themselves and relative to the water environment. Underwater drilling vessel equipped with seats and a docking sites for the installation of the mobile modules supply consumables and further comprises a compartment circulating system, and mud pump compartment cemented equipment and also equipment compartment system for the elimination of oil and gas forms.

Riser means for drilling wells under the direction and production drilling is provided with elements quick-release locking device to ensure a quick connection with the corresponding elements of the compartment of the rotor Assembly and lifting system underwater drilling and wellhead connectors bottom support plate and universal preventer to ensure the sealing process communications otnositel the aquatic environment, moreover riser tool for drilling further provided with a spot preventer to seal wells.

Bottom base plate made of pontoon type and includes a bottom spaced along its perimeter ballast tanks, wellhead connectors, installed in the respective guide holes of the bottom support plate. Bottom base plate provided with a cart with operational equipment, the number of which corresponds to the number of the estuarine connectors that are installed with the possibility of movement along the respective guide rails located on the bottom of the bottom support plate, and align the connecting elements of the operational equipment with connecting elements corresponding estuarine connectors. Bottom base plate provided with a hard farm which contains a support and centering elements for the installation of the hull of the underwater vessel.

The circulation system for drilling mud made isolated from the aquatic environment and the interior compartments of the drilling vessel and includes at least one mud pump with a closed circulating water, the capacity of the mud with successive tanks with mixing devices, and suction cavity is uravago pump is associated with the capacity of the drilling fluid, and the discharge through the drilling manifold, power swivel, the inner cavity of the drill pipe and a check valve associated with the working cavity of the bore, with the inner cavity of the riser column of drill pipe, the upper part of which is connected to the input cavity vibroacoustics, one output of which through the retaining valve is connected to the input camera mud tanks, and the second with a capacity of cuttings. Elimination system oil and gas manifestations completed isolated from the aquatic environment and the interior of the drilling vessel and includes an outline of the drainage of oil and gas manifestations and contour plugging of wells, the outline of the allocation of oil and gas manifestations include multiphase gas-liquid separator, the entrance of which is through the blowout manifold and through the riser tool for drilling associated with the cavity well, the first gas-liquid separator connected to the flexible gas line to the input of a flare, and the second associated with hydraulic reserve capacity, and the path killing the well includes a serially connected capacitance weighted mud, pump, block, kill, BOP manifold, riser tool for drilling and wellhead connector associated with the cavity of the well.

Nedostatki the technological complex is its danger, because he has a large number of nodes, which can lead to failure of the drilling equipment from being filled with water through the quick coupling. A large number of quick couplings and fittings leads to the great labor of the entire complex.

Seats and docking space for the installation of the mobile modules supply consumables unreliable and time-consuming. Bottom base plate, provided with a cart with the possibility of movement along the guides, can lead to jamming of the boat and damage the whole technological complex. The creation of the circulation system, the elimination of oil and gas manifestations isolated from the aquatic environment will complicate the technology development and maintenance. Install the support plate to mount her vibro equipment is unsafe, because the work will be carried out in the ice position.

Also known underwater drilling rig for the development of hydrocarbon fields (oil and gas) in the Arctic shelf (See patent RU No. 2380541, CL IS 50/00 is taken as a prototype). It is made in a sealed housing, which is provided with two rigidly mounted on opposite sides of submarines equipped with hatches and gateways, receiving, and production of small underwater vehicles, the rich near, at the bottom, the anchor is installed, the auxiliary unit, which structurally is similar, but is not inside a drilling rig and auxiliary equipment for the preparation of the drilling fluid and means for cleaning drill cuttings and cleaning device for cleaning of sewage coming from all blocks.

Underwater drilling rig and its auxiliary unit with submarines equipped with streamlined sealed enclosures, which are rigidly mounted on the stern and at the bow of each of the submarines, and these uprights rigidly fixed section of these blocks, and inside racks mounted above doors and gateways for small underwater vehicles, and under each of submarines for more precise maneuvering and counter-mounted transversely to the longitudinal axis of the advanced propulsion-screws self-drive each.

Underwater drilling rig is dangerous and inconvenient for installation and maintenance, because it is directed and mounted under water at depth by divers and equipment, connect cables and pipelines. The separation of the drilling rig and auxiliary equipment for the preparation of drilling mud and cleaning drill cuttings complicates its operation. Work with the rig is only possible in surface position due to its size and number is oborudovanie and works in a submerged position will be destroyed.

The task of the invention is to implement a secure and convenient layout solutions for underwater drilling rig that provides the minimum probability of severe impacts on staff even under the most severe emergencies (major break-through gas medium from the well during drilling and the like), simplifying the technology works, reducing the complexity, and the use of existing capacity shipyards.

Research conducted by the Russian Institute of Arctic and Antarctic), confirm that in the above seas level ice thickness, typically 1.5-3 meters, hummocks up to 25 meters. The movement of broken ice or field is constant.

The essence of the invention lies in the fact that one submarine is made in the form of a deepwater drilling system, consisting of two modules, one technology, providing the entire cycle of the well construction and other drilling. Part of the process module includes a pressurization system of the drilling module, a battery compartment connected to the cable connector. In the upper part of the technological module is equipped with a pop-up alarm camera with nodes joining and self-propelled underwater apparatus with nodes joining and bottom - lock camera Spojene-Elevator device. The drilling module is vertically relative to the process module, and connected with it by means of pipelines and power cables. In the center of the drilling module is placed drilling rig with hydraulic drive.

In the center of the deck is fixed to the rotor of the hydraulic drive mounted with the possibility of sliding along the rails in the direction to release the holes for lowering of the drilling equipment on the bottom. In the axial plane of the drilling module is placed floor bottom base plate, block, preventer, drilling tools, and on the opposite side of the hosted machine feeding and screwing pipes. Pipes are placed along the radius on the candlestick of the drilling module. In the center of the drilling module, in its lower part, in the raised state is retractable pipe diameter, providing a passage block preventer and a bottom support plate for preventing flooding of the drilling module. In the bow of the deep sea drilling complex vertically there are two tanks for drilling cuttings, rigidly connected with the drilling module. The nasal part of the deep sea drilling facility in the area of the drilling module is equipped with an additional counter.

The second submarine is an underwater nuclear energy complex. It consists of a living module equipped in the upper part through the cabin of the aircraft is liwayway emergency camera, and at the bottom - lock chamber with a lift-Elevator device, and turbine generator compartment, the reactor compartment.

In the bow of the submarine and energy complex hosted the drum drive and the power cord connected to an uninhabited underwater apparatus serving for blind mating with a cable connector deepwater drilling complex. The rack is made retractable and is equipped with rack-and-pinion hydraulic drive mechanism of their separation with the lack of effort when pulling racks from the ground and with the possibility of dropping them in case of emergency ascent. Deepwater drilling complex and underwater nuclear energy complex is set on the ground at a safe distance from each other and provided with racks mounted on the stern and at the bow.

The essence of the invention is illustrated by drawings, where figure 1 - General view of the underwater rig for the development of hydrocarbon fields (oil and gas) in the Arctic shelf; figure 2 - deepwater drilling complex; figure 3 - underwater nuclear energy complex; figure 4 - section a-a deepwater drilling system.

Underwater drilling rig for the development of hydrocarbon fields (oil and gas) in the Arctic shelf in a submerged position at a depth of up to 400 - 600 meters comp is it from one of the submarine, made in the form of a deepwater drilling system 1, and the second submarine, made in the form of a nuclear submarine and energy complex 2, installed on the ground at a safe distance from each other and provided with a rack 39, mounted on the stern and bow. Deepwater drilling complex 1 consists of two modules - process 3, providing the entire cycle of the well construction and drilling module 5.

The technology module 3 includes a pressurization system 4 of the drilling module 5 and a battery 6 connected to a cable connector 7.

In the upper part of the technological module 3 is equipped with a pop-up alarm camera with 8 nodes dock 9 and self-propelled underwater apparatus 42 also hosts dock 9, and at the bottom - lock chamber 10 with a lift-Elevator device 11.

The drilling module 5 is vertically relative to the process module 3 and connected with it by means of pipelines and power cables 12. In the center of the drilling module 5 posted by rig 13 with a hydraulic actuator 14. In the center of the deck attached to the rotor 15 with the hydraulic actuator 16 that is installed with the possibility of sliding along the rails 17 in the direction to release the holes for lowering drilling equipment 18 on the ground.

In the axial plane of the drilling module 5 o f the s floor bottom base plate 19, block preventer 20, the drilling tool 21, and the opposite side is placed the machine feed and the screwing of the pipe 22. Pipe 23 is placed at the radius of the drilling module 5 on the stand 24. Also in the center of the drilling module 5, in the lower part, in the raised state is retractable pipe 25 in diameter, providing a passage block preventer 20 and the bottom support plate 19, thus preventing the flooding of the drilling module 5.

In the bow of the deep sea drilling complex 1 vertically there are two tanks for drilling 26, rigidly connected with the drilling module 5. The forward part of a deepwater drilling system 1 in the area of the drilling module 5 has an additional counter 27. The second submarine is an underwater nuclear energy complex 2 and consists of a living module 28, is fitted in the upper part through the wheelhouse 29 pop-up alarm camera 30, and at the bottom - lock chamber 31 with a lift-Elevator device 32. Nuclear submarine and energy complex 2 contains also the turbo-generator compartment 33, the reactor compartment 34. In the bow of the submarine and energy complex 2 posted by drum 35 with the actuator 36 and the power cable 37 connected to an uninhabited underwater apparatus 38, which serves for blind docking with the ship connector 7 deepwater drilling complex is a 1. Nuclear submarine and energy complex 2 is equipped with a rack 39, made retractable to install it on the ground and provided with rack-and-pinion-hydraulic drive mechanism 40 with their end 41 with the lack of effort when pulling racks from the ground and with the possibility of dropping them in case of emergency ascent.

Underwater drilling rig for the development of hydrocarbon fields (oil and gas) in the Arctic shelf works as follows.

Deepwater drilling complex 1 and underwater nuclear energy complex 2 pre-installed on extended hours 39, on prepared sites in the ice position to secure from each other a distance. After that deepwater drilling complex 1 and underwater nuclear energy complex 2 align in the horizontal plane using a rack and pinion-hydraulic actuator 40. Nuclear submarine and energy complex 2 comprises a drive drum 36 and unmanned underwater vehicles 38 attached thereto a power cable 37 is directed towards deepwater drilling complex 1, where unmanned underwater vehicle 38 is joined with cable connector 7. Power cable 37 is energized to process 3 and rig 5 modules. Included pressurization system 4 of the drilling module 5, opens the cover (not shown) in igna part of the drilling module 5, nominated retractable pipe 25. The water level is maintained between upper and lower level in the sliding tube 25. Begins the process of drilling wells. Set bottom base plate 19 on the ground, it sets the block preventer 20. All operations are performed using the drilling tool 21 and the drilling rig 13, after that make drilling and extension pipe 23 to capture their machine feeding and screwing pipe 22.

All drilling equipment module 5 operates in a gaseous environment with a pressure equal to the outside that allows you to remotely manage and control the entire process of creating a well. When loading large equipment, such as bottom base plate 19, block, preventer 20 it must pass through the hole in the sliding tube 25 with a diameter of not less than four meters.

Nuclear submarine and energy complex 2 supplies power technology module 3 and the drilling module 5. Nuclear submarine and energy complex 2 equipped accommodation module 28, which directs shifts a team of experts to work with the equipment on the technological module 3 and the equipment placed in the drilling module 5.

The team of experts after completion of works on technological module 3 deep-sea drilling complex 1 leaves it and returns to nuclear is Obvodny energy complex 2, using self-propelled underwater vehicle 42.

Using locks chambers 10, 31 lift-Elevator device 11 is necessary to make periodic inspection of the entire rig. Pop-up alarm camera 8 and 30 when forsmazhernyh circumstances will allow you to leave the boat.

When removing the uprights 39 of the soil rack-and-pinion hydraulic actuator 40 and the lack of effort racks 39 are separated using a separation mechanism 41. The drilling module 5 provided with two containers 26 for drilling cuttings generated during the drilling process. After completion of the drilling rig 13 raises the sliding tube 25.

Closed cover (not shown), reducing the pressure in the drilling module 5 is detached from the deep sea drilling complex 1 power cable 37 and deepwater drilling complex 1 is returned to the base for receiving pipes 23 and consumables for subsequent drilling.

Using the present invention will be achieved safety and convenience in drilling, simplifying the technology works, reducing the complexity, and the use of existing capacity shipyards.

Underwater drilling rig for mining of hydrocarbons - oil and gas on the Arctic shelf, consisting of two submarines, equipped with the Boers the th installation, as well as doors and gateways, receiving, and production of small underwater vehicles, and auxiliary equipment, characterized in that one submarine is made in the form of a deepwater drilling system, consisting of two modules, one technology, providing all the well construction cycle, which includes the pressurization system of the drilling module, and a battery compartment connected to the cable connector in the upper part of the technological module is equipped with a pop-up alarm camera, self-propelled underwater apparatus and the docking sites, and in the lower part of the lock chamber with a lift-Elevator device, and other drilling module located vertically relative to the process module, and connected to it by means of pipelines and power cables through the center of the drilling module is placed drilling rig with hydraulic drive, in the center of the deck is fixed to the rotor of the hydraulic drive mounted with the possibility of sliding along the rails in the direction to release the holes for lowering of the drilling equipment on the seabed, in the axial plane of the drilling module is placed floor bottom base plate, block, preventer, drilling tools, and on the opposite side of the hosted machine feeding and screwing the pipes, and the pipes are placed along the radius on the candlestick brown the second module, also in the center of the drilling module, in its lower part, in the raised state is retractable pipe diameter, providing a passage block preventer and a bottom support plate for preventing flooding of the drilling module in the bow of the deep sea drilling complex vertically there are two tanks for drilling cuttings, rigidly connected with the drilling module and the fore part of the same deep-water drilling facility in the area of the drilling module is equipped with an additional counter, and the second submarine is made in the form of a nuclear submarine and energy complex and consists of residential module equipped in the upper part through the cabin pop-up alarm camera, and bottom - lock chamber with a lift-Elevator device, and turbine generator compartment, the reactor compartment in the bow of the submarine and energy complex hosted the drum drive and the power cord connected to an uninhabited underwater apparatus serving for blind mating with a cable connector deepwater drilling complex, and racks made retractable and is equipped with rack-and-pinion hydraulic drive mechanism of their separation with the lack of effort when pulling racks from the ground and with the possibility of dropping them in case of emergency ascent, and deep Burov the th complex and underwater nuclear energy complex is set on the ground at a safe distance from each other and provided with racks, mounted on the stern and the bow.



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: platform contains supporting base of submerged type. Note that platform power unit-module is made in the form of automated nuclear electric station designed for power supply, and unit-modules are made with compressor and pump equipment, with automated control system, with diving and submerged-technical equipment that serve for primary preparation of well product for transportation to the main process platform and/or to offshore off-loading terminal for well product storage. Note that the whole platform assy is made in the form of circle and/or polygon, in the centre of which there is a wellhead module with wellheads equally spaced between themselves.

EFFECT: increase of reliability of submerged production platforms construction and operation with simultaneous provision of wells location inside the object.

8 cl, 3 dwg

FIELD: transport.

SUBSTANCE: invention relates to oil production in arctic waters, particularly, to ship for use therein. Proposed ship is available in two versions. In compliance with first version, ship can drill via drill water separation string extending from sea bottom well to turret arranged aboard the ship. Said drill water separation string can be detached from the ship located under its main line. At turret separation from the ship its bottom part submerges along water separation column to occupy equilibrium position whereat its surrounds at least partially a part of drill water separation column. In compliance with second version, proposed ship for drilling oil and/or gas production wells can be connected with at least one water separation column connected with turret coupled with ship of drill water separation column extending through the turret connected with the ship. Two lengthwise boards extend between ship fore and aft with ice belt made at, at least 50% of their length, the angle a of 45-80 degrees between ship hull and horizontal line.

EFFECT: lower load at anchoring and maneuvering devices, improved conditions of operation in arctic waters.

5 cl, 18 dwg

FIELD: oil and gas industry.

SUBSTANCE: from water surface up to near-bottom methane hydrate deposit tube with diameter from 0.01 m up to 1 m is taken down with methane collector at upper butt end. In near-bottom deposit at lower butt ends of this tube pulp is made containing suspension of solid particles of methane hydrate in ambient water with size from 10-6 m up to 0.01 m and weight content of methane from 0.01% up to 10%. At the beginning forces flow of pulp is created at lower butt end of the tube in order to initiate a self-maintained process. In methane collector liquid water and gaseous methane are divided. Then water is drained and methane is collected.

EFFECT: improving effectiveness of the method due to decrease of power supply from outside.

7 cl

FIELD: transport.

SUBSTANCE: breakaway ship mooring device comprises mooring buoy 11 and swivel arranged there above. Mooring buoy comprises central element 2 for anchoring to sea bed including several channels to house vertical pipelines 4. Mooring buoy external element 5 surrounds is central element to turn thereabout. Said external element can be located and secured in the ship appropriate recess. Aforesaid swivel is located above mooring buoy to provided for space there between to allow load lifting means to pass there through in buoy up/down displacement during connection/ disconnection. Besides that is a manifold arranged between buoy and swivel.

EFFECT: improved operation, simplified design.

7 cl, 2 dwg

FIELD: transport.

SUBSTANCE: invention relates to platforms for underwater oil extraction in zones of extreme sea and weather conditions. Platform 10 comprises a detachable anchoring system 1, 2, 3 to anchor lines 13 at sea bed and connection pipes 14 thereat. Anchoring system comprises mooring buoy 1 for anchor lines and pipelines of connection with sea bed. Note here that said buoy is a circular element. Turntable 2 extends inside cavity 4 crossing the floating platform hull over its entire height. Said mooring buoy is secured at turntable 2 under platform hull. Turntable 2 comprises tight external structure 2b with bottom 2c tightly connected with lower end of external structure 2b. Tubular external structure 2b incorporates internal structure 2a jointed with deck level with its top end 2a1. Internal structure and tubular external structure interact, on one side, with one lower rolling bearing or slider bearing to allow rotation of internal structure without that of external structure when the platform is driven around cavity vertical axis ZZ' and tight tubular outer structure. Lower rolling or slider bearing 51, 52 is located above water surface inside tight external structure.

EFFECT: simplified and reliable design, improved servicing conditions of rolling bearings.

10 cl, 8 dwg

FIELD: transport.

SUBSTANCE: invention relates to floating oil production platform. Platform 10 comprises a detachable anchoring system 1, 2, 3 to anchor lines 13 at sea bed and connection pipes 14 thereat. Besides it comprises mooring 1 buoy for connection of anchor lines and first pipelines 14 of connection with sea bed and turntable 2 arranged inside space 4 crossing the platform hull over its entire height. Said mooring buoy is secured at turntable 2 under platform hull. Platform includes the system for connection/disconnection of said mooring buoy to/from turntable bottom wall 2c that comprises multiple lifting cables 20b and pumps 22 to deliver water in mooring buoy valve chamber 30.

EFFECT: oil production in extreme sea and weather conditions.

15 cl, 9 dwg

FIELD: oil and gas industry.

SUBSTANCE: well is drilled on a sea bottom to an oil-bearing horizon, closed with a shell, and hydrocarbons are transported along the pipe to the surface. According to the invention, a process of forced controlled formation of gas hydrates is established. For this purpose oil containing gas is mixed with the necessary water amount from the surface in a cone, comprising facilities of mechanical mixing in the form of an impeller rotated by water that arrives via nozzles fixed at the impeller's level in the cone wall, until formation of gas hydrates. A mixture of products of gas hydrates destruction in the form of a gas-hydrate sludge - sand, water and oil - is transported to the surface. The casing pipe on the well head comprises a plug damaged by a signal. The shell is made in the form of a cone, the top of which is connected with a pipeline, and edges - with a ballast ring. Inside the cone on its axial line there is an impeller fixed, at the level of which along the ring in the cone wall there are controlled nozzles fixed, which have an angle to the cone tangent, providing for maximum speed of impeller rotation as water arrives from the surface.

EFFECT: reduced probability of clogging of a transport pipeline and delivery of hydrocarbons of any type, gas or liquid, with the help of one process complex from the bottom to the surface.

2 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: steel reservoir, which is open at the bottom, is used, with thickness of its walls equal to 7-10 mm, and having piping with escort vessels. At the same time outer pressure P1 of hydrostatic water column is measured, as well as inner pressure P2 of oil and gas medium inside the reservoir, and pressure difference ΔP between them is calculated, which shall be excessive and shall not exceed 4000 Pa, from the following ratio: ΔP=P1-P2≤4000 Pa. At the same time flexible pipelines are used for piping, and controlled throughput capacity is calculated on the basis of the following ratio: Fw<(Fg+Fo+-Fc)<<Fr, where Fw - throughput section of the emergency gusher well; Fg, Fo, Fc - throughput section of flexible pipelines of gas, oil and operative control, accordingly; Fr - throughput section of the reservoir.

EFFECT: possibility to use a light and simple to make structure, necessary to realise the method, possibility for efficient control of a reservoir when it is lowered or lifted.

3 cl, 1 dwg

FIELD: transport.

SUBSTANCE: invention relates to underwater hydrocarbons production, particularly, to detachable mooring anchor turntable system and method of attachment of mooring buoy to turntable. Vessel 14 comprises hull 3, shaft 2 extending for hull top 40 to bottom 41, turntable 1 arranged to turn in said shaft on turntable support 4, 5 and manifold bearing structure 31. Said manifold bearing structure accommodates one or more pipelines. Said structure can be turned on turntable by manifold support 32. Turntable 1 comprises chamber 42 to receive mooring buoy 11 with one or several risers 12. Said risers can displace vertically the actuators 33 nearby manifold support 32 for vertical displacement of manifold bearing structure 31 relative to turntable 1 between turning position whereat structure 31 may turn relative to turntable and locked position whereat structure 32 is locked.

EFFECT: fast and reliable attachment/detachment of mooring anchor turntable system in bad weather.

14 cl, 17 dwg

FIELD: transport.

SUBSTANCE: ship 14 comprising hull 3 with chamber 42 arranged nearby bottom 41 to house mooring buoy 11, lifting device 20, 45 mounted on the hull and including cable 17. Said cable passes through chamber 42 to weight 16 located under ship bottom 41. Mooring buoy 11 is secured to cable 17 and includes mooring lines secured to sea bed 19. Said lines are arranged in chamber 42 for connection to turret 1. The comprises central shaft 44 with cable 17 passed there through to displace along said cable. Weight 16 is arranged at cable, buoy or there under. Retainer 21 is arranged at cable to engage with buoy and to lock buoy and cable displacement and secured to the cable nearby buoy top or bottom ends.

EFFECT: fast connection of disconnection of mooring buoy.

10 cl, 13 dwg

FIELD: transport.

SUBSTANCE: invention relates to active and passive stabilisation of a vessel, for example, ships, vessels for operation in shallow waters, floaters, drill rigs and lifting cranes. Vessel 10 is equipped with buoyancy and/or ballast cisterns 11a-d. The latter have openings 12a-d made in vessel bottom. Said openings allow passage of notable flow of water without cavitation of whatever other type of drag. System comprises means 13a-d for feeding fluid into cisterns 11a-d controlled to ensure opposition to external force action to motion of ship vessel 10. Invention covers also the method of active and passive stabilisation with the help of above described system.

EFFECT: higher safety in open sea.

24 cl, 11 dwg

FIELD: transport.

SUBSTANCE: invention relates to floating means intended for specific purposes, particularly, to structures of floating elements that make identical sections of construction of floating platforms. Floating element comprises at least two sides with at least one vertical ledge at said two sides with at least one vertical recess corresponding to said vertical ledge, top side and bottom to create hollow body with at least one ear for fastener. Every vertical ledge and appropriate vertical recess are composed by at least three faces two of which parallel and perpendicular to third face.

EFFECT: higher reliability, sufficient manufacturability.

2 dwg

Floating platform // 2504498

FIELD: transport.

SUBSTANCE: invention relates to special-purpose floating means, for example, pontoons, floating docks, rafts, etc. Floating platform comprises at least two floating elements connected by one joint, each consisting of at least two lateral faces with at least one vertical ledge at each lateral face with at least one vertical recess complying with vertical ledge, top face and bottom that make hollow hull with at least one lug to accommodate connection element. Every vertical ledge and appropriate vertical recess are composed by at least three faces two of which parallel and perpendicular to third face.

EFFECT: higher reliability, expanded operating performances.

4 dwg

FIELD: transport.

SUBSTANCE: invention relates to sea gravity platforms for exploration of oil and gas deposits at continental shelf. Proposed platform comprises submersible offshore platform composed by bottom and top bearing plates, sidewalls and internal bulkheads. Bell consisting of separate sections is hinged to submersible platform bottom part. Every said section comprises vertical wall, stiffness ribs and guide pipes. Stiffness ribs have support elements at the points of abutting on bottom plate. Submersible platform sidewalls includes element for attachment of said bell in transport position and recesses to accommodate retainer pints.

EFFECT: higher stability, low draft, fast assembly and disassembly.

5 dwg

FIELD: transport.

SUBSTANCE: invention relates to floating platforms. Floating platform for waters with ice comprises gull with outer sidewalls and metalling device. Hull is symmetric about platform vertical central axis and is closed at lower part by bottom. Platform draft is notably smaller than platform diameter. Platform floatability centre for its submerged part is located lower than centre of gravity of the platform. Said symmetric outer side of the hull includes at least three sections: water level section, cylindrical mid section and bottom section. Water level section features diameter decreasing downward along central axis. In operation in waters with ice, sea water level is located in water level section. Bottom section features diameter increasing downward along central axis. Metalling device serves for selective raise or descent of the platform so that water level is located nearby water level section or in mid section. Proposed method comprises actuating aforesaid metalling device for selective raise or descent of the platform depending on whether the platform is in water with ice or without it.

EFFECT: minor damages caused by ice.

9 cl, 4 dwg

FIELD: transport.

SUBSTANCE: invention relates to ship building and sea transport, particularly, to operation and design of natural gas production, storage and unloading vessels. Proposed system comprises natural gas extraction vessel and liquefied natural gas storage vessel connected with the formed by pipeline. To ensure safety, natural gas liquefaction is performed at extraction vessel while storage and unloading is carried out at storage vessel spaced from the first one by explosion-proof distance. Transfer of liquefied natural gas from first vessel to second one is performed via heat-insulated pipeline with required buoyancy and rigidity and articulated with both vessels.

EFFECT: higher safety in operation.

2 cl, 2 dwg

FIELD: transport.

SUBSTANCE: invention relates to oil production in arctic waters, particularly, to ship for use therein. Proposed ship is available in two versions. In compliance with first version, ship can drill via drill water separation string extending from sea bottom well to turret arranged aboard the ship. Said drill water separation string can be detached from the ship located under its main line. At turret separation from the ship its bottom part submerges along water separation column to occupy equilibrium position whereat its surrounds at least partially a part of drill water separation column. In compliance with second version, proposed ship for drilling oil and/or gas production wells can be connected with at least one water separation column connected with turret coupled with ship of drill water separation column extending through the turret connected with the ship. Two lengthwise boards extend between ship fore and aft with ice belt made at, at least 50% of their length, the angle a of 45-80 degrees between ship hull and horizontal line.

EFFECT: lower load at anchoring and maneuvering devices, improved conditions of operation in arctic waters.

5 cl, 18 dwg

FIELD: construction.

SUBSTANCE: platform comprises a support base made in the form of a bottom board with a developed surface, strongly connected with a perpendicularly installed ice-resistant support block, somewhat protruding towards the bottom below the level of the near-bottom plane of the board. At the same time the ice-resistant support block is made in the form of a cylindrical column; special pipes - water-separating columns installed into the ice-resistant support block, through which operating wells are drilled; a superstructure made in the form of three replaceable floating decks with U-shaped cuts in the centre: decks of civil construction purpose, decks of drilling purpose and decks of operational purpose, at the same time U-shaped cuts are made as congruent to the cross section of the ice-resistant support block; detachable lifting mechanisms installed on the outer side along the perimeter of the U-shaped cut of the deck, engagement or disengagement with the support base is provided, as well as movement and fixation of the deck at the safe height of the ice-resistant support block; piles for fixation of the support base drilled with a drilling plant along a curvilinear trajectory provide for safe operation of the structure.

EFFECT: increased reliability of operation and process safety of an area of water during civil construction and drilling works.

3 cl, 3 dwg

FIELD: transport.

SUBSTANCE: invention relates to ship building, particularly, to drilling platforms and to oil and gas production at offshore deposits. Supply ship comprises solid hull and light hull of flooded pilothouse. Ship hull is composed of submarine-type solid hull with set of sealed lock hatches thereat. Besides, this ship is equipped with communication platform equipped with gate channel arranged vertically to extend through deck and bottom of said platform. Ship solid hull bottom incorporates extra sealed lock hatch equipped with the seat of sealed joint between supply ship and communication platform. Gate channel branch pipe doubles as the platform solid hull. Seats of sealed joint between supply ship and communication platform are arranged above sealed lock hatches of gate channel. Communication platform deck accommodated supply ship bottom slip. Underwater oil production platform light hull accommodates rope winches and flexible hose mechanised reels. Oil production platform solid hull outer section accommodates extra hatch of sealed lock integrated with sealed joint for mating seat at communication platform. Oil production underwater platform deck accommodates the slip for communication platform bottom.

EFFECT: expanded operating performances, chances for rescue operations.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to ship building, particularly, to marine structures for production and storage of liquefied natural gas. Proposed plant comprises hull 10 with the first ballast tank 11 to keep ballast water, floating structure 30 spaced apart with hull 10 through preset distance to float at the side of said hull 10. Said floating structure 20 has second ballast tank 21 to keep ballast water. Liquefaction plant 30 has one its end connected with ship hull 10 and another end connected with floating structure 20 to rest on hull 10 and said floating structure 20.

EFFECT: higher stability, fast and easy installation without improvement of existing equipment.

6 cl, 1 dwg

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

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