Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs and construction methods therefor (E02B17)

E   Fixed constructions(158735)
E02B17                 Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs; construction methods therefor (fenders e02b0003260000; anchoring floating platforms b63b0021000000; floating platforms, e.g. anchored, b63b0035440000; independent underwater structures e02d0029000000)(719)

arine ice-resistant platform // 2640345
FIELD: construction.SUBSTANCE: marine ice-resistant platform comprises a base plate 1 made with the possibility to adjust its buoyancy, coaxially interfaced with a support shell 2, on which an upper structure 3 is mounted with the possibility of vertical movement along it. The base plate 1 is equipped with vertical through channels adapted for entering piles and securing them therein. The plant is equipped with several means of piling, made with the possibility to move around the perimeter of the upper structure, for which purpose the latter is equipped with at least two rail guides spaced apart vertically. Protective casings 4 of the piling means are made with a length more than the water area depth at the platform location and are installed in clamps of carriages interacting with said rail guides. The clamps of the carriages are made with the possibility to switch off the locking of the casing 4 therein, and the casing 4 is preferably mounted coaxially with its longitudinal axis with the axis of the vertical through channels of the base plate. Pile extraction means made in the form of crane plants are located on the deck of the upper structure 3, are made in the form of a vibratory pile driver and a protective casing 4, of a diameter larger than the diameter of the vertical through channel of the base plate, made with the possibility of coaxial airtight docking with the base plate equipped with water and/or slit removing means. In addition, each protective casing 4 is equipped with a vertical channel made as a chute projecting from the casing section, provided with a flight of stairs.EFFECT: possibility of efficient operation of an ice-resistant platform in shallow areas of the continental shelf with weak foundation soils, while increased platform mobility is ensured, because it is adapted to transport in the assembly and installation, high ice-resistance of the platform due to the use of pile fastening of the base, high mounting and dismantling speed of the pile foundation in case of platform relocation to another site.2 cl, 12 dwg

arine ice-strengthened platform // 2634143
FIELD: construction.SUBSTANCE: invention relates to marine mobile platforms. A marine ice-strengthened platform comprises a base plate made with the possibility to adjust its buoyancy, coaxially associated with a support shell on which an upper structure is mounted with the possibility of vertical movement along it. The base plate is equipped with vertical through channels adapted for entering piles and securing them therein. The plant is equipped with a mounting frame movable along the axis of the support shell and equipped with several pile driving means made movable along the mounting frame perimeter. For this purpose, the mounting frame is provided with at least two rail guides spaced vertically. Wherein the protective casings of the pile driving means are made longer than the water area depth at the platform location and are installed in the clamps of the carriages interacting with said rail guides, the carriage clamps being made with the possibility to turn off clamping the casing therein. The casing is mounted with its longitudinal axis preferably coaxially with the axis of the vertical through channels of the base plate. Pile extraction means made in the form of crane plants are arranged on the deck of the upper structure. The pile driving means are made in the form of a vibratory pile hammer and a protective casing with a diameter larger than the diameter of a vertical through channel of the base plate, made with the possibility of coaxial airtight docking with the base plate equipped with water and / or silt removing means.EFFECT: possibility of operating an ice-strengthened platform in shallow areas of the continental shelf with weak base soils.2 cl, 15 dwg
ethod for consolidation of ground base of hydrotechnical structure // 2628348
FIELD: construction.SUBSTANCE: primary application area of the invention is the consolidation acceleration of the ground base of the hydraulic structure of the gravity and pile-gravity types installed on the seabed in shallow shelf regions in difficult natural conditions, where, as a rule, the ground base is composed of cohesive soils. The method of consolidation of the ground base of the hydraulic structure installed on the seabed provides for the structure immersion by accepting ballast by the structure and setting the structure base onto the seabed. Wherein on the seabed, outside the structure setting area, the wellpoints are placed at some distance from the structure foundation along its perimeter, connected to a single hydraulic system in which underpressure is created and maintained by a vacuum pump. The structure is immersed by ballasting the platform housing, up to ensuring the calculated contact of the foundation bottom of the platform housing with the seabed while simultaneously pressing the base of the electrodes into the ground. After that, the wellpoints are connected to the negative pole of the direct current source, and the electrodes are connected to the positive pole of the direct current source, and the electric current is passed to ensure the formation of the low ground water saturation area in the interaction area of the foundation with the ground base, ensuring the consolidation of the platform ground base, after which the electric current is switched off.EFFECT: reducing material consumption and labour intensity while creating a hydraulic structure, reducing the ballast volume for ensuring specified stability of the hydraulic structure due to reducing the pore pressure in the ground, formed during the installation of the structure on the seabed, and increasing the stability and carrying capacity of the ground base of the hydraulic structure.2 cl, 3 dwg
Device for protection of marine stationary construction from drifting ice or ice coating // 2626152
FIELD: construction.SUBSTANCE: device for protection of the offshore stationary construction 1 from the drifting ice 2 which is located at a distance from the offshore stationary construction 1 is a high-frequency energy radiator connected electrically to a source of converting electric power to ultrahigh-frequency energy. The ultrasonic radiators 6 are used as the radiators of ultrahigh-frequency energy, and the device is equipped with a ring-shaped enclosure of a cylinder-shaped form 3, made of reinforced concrete, which is immersed in seawater for part of its height, which surrounds the marine stationary construction 1. On the outer surface of the side wall of the ring-shaped enclosure 3, the radiators 6, made as ultrasonic, are located. The ring-shaped enclosure 3 is made of interconnected modules, each of which is a part of the wall of the ring-shaped enclosure, which is rotatably mounted around a permanently installed marine construction.EFFECT: reduction of energy consumption and labour of destruction of ice and increase in productivity when creating the opportunity to defragment the ice cover, while preserving the ice area around the drilling rig.2 dwg

Self-lifting drilling ice-resistant plant // 2620816
FIELD: transportation.SUBSTANCE: plant contains: housing with living and office premises, equipment and operation provision systems, the body has positive buoyancy, it is provided with at least three supports, made as the truss structures, with the possibility of extension from the housing through portals, with support on the bottom soil and the housing lifting above the water, provided with bases; a drilling tower, located on the housing, with a drilling area passing through one of the supports and provided with drill strings. The support base, enclosing the drilling area is designed as the riser base. The supports are provided with ice deflectors, performed in the shape of shells with positive buoyancy and with the possibility of reciprocating sliding along the supports through its portals and fixing thereon, with the formation of the closed cavity around the supports at the waterline level, which is made with ability to supply therein the heated working fluid from the housing. The ice deflectors are made in the form of the shell, which is in the variable waterline area equipped with the ice-breaking nozzle, formed by the cone volumes, docked with larger bases. The inclination angle of the cones generatrices to its larger base is α=45-60°. At that the cones height is not less than the half of the variable waterline height range. At that the length of the ice deflector exceeds the distance from the housing deck up to the lower level of the variable waterlines area, with the recess below it, not less than the height of the cone. The ice deflectors are equipped with tight closures from above, in addition, the drilling tower is located on the body, with the ability to move from the support center, containing the drilling area to the body center, at least beyond the portal of this support. In addition, the bottom of the drilling plant housing is made as non-planar, for example, the dihedral. In this case, the support cross-sectional area, containing the drilling area exceeds the cross-sectional area of the remained supports and the riser base.EFFECT: provision of constructive ice protection, increasing the navigational period of operation under the ice conditions, reduction of the ice abrasive action on the surface of the truss structures bearing elements of self-lifting drilling plant supporting columns, reduction of time for the columns release from the ice to ensure its lifting, if the emergency evacuation of the platform is required.3 cl, 5 dwg
Ice-resistant supports for self-elevating offshore platforms // 2618107
FIELD: construction.SUBSTANCE: proposed ice-resistant support 1 for a self-elevating offshore platform has a multitude of pillars 2, and panel structures 3, wherein the pillars 2 and the panel structures 3 are arranged alternately such that the panel structure 3 connects the pillars 2 to form a peripheral structure of ice-proof support 1. The ice-resistant support 1 also contains a set of longitudinal stiffening elements 4 arranged along the inner surface of panel 3 to provide structural rigidity of these structures, and a set of transverse connecting beams or frames 5 located on the inner surface of panel 3 structures to support the set of longitudinal stiffening elements 4. The present invention also includes an ice-resistant self-elevating offshore platform with the said ice-resistant support.EFFECT: possible operation of self-elevating platforms in areas exposed to sea ice.10 cl, 7 dwg

Design of bearing part of offshore fixed platform in offshore area // 2615809
FIELD: construction.SUBSTANCE: invention relates to construction and namely the construction of bearing part of offshore fixed platforms (OFP), intended for development of oil and gas fields on the continental shelf offshore, including the Arctic. The design of the support part of the offshore fixed platform in offshore area includes a vertical supporting column and vertical ribs, radially arranged around the perimeter of the walls of the supporting column, designed for transmission of all kinds of loads from the platform. Each rib transmits all kinds of loads from the platform on its own, dug into the ground and independently operated, hollow cylinder fitted with equipment for hydraulic erosion of the soil under the walls of the cylinder and its immersion. The minimum number of cylinders for a single platform is three.EFFECT: invention can improve reliability and accelerate the erection of the supporting part of OFP using platform support members buried into the seabed.3 dwg

Jacking system with auxiliary structure // 2608588
FIELD: mining.SUBSTANCE: group of inventions relates to jacking systems for drilling and production at sea areas exposed to icing. Jacking system with auxiliary structure comprises a working deck structure, a plurality of support columns movably connected to the working deck structure, cantilever arranged on the working deck structure, drilling derrick located on the cantilever, one or more support main structures located on the sea bottom, and a plurality of movable supports, each of which is rigidly connected to the main deck structure. Working deck structure, a plurality of support columns, cantilever and drilling derrick form a jacking drilling assembly. Method consists in the fact that during initial assembling of the jacking system, a plurality of support columns is being lowered to the sea bottom to lift the working deck structure with required height. During assembling of the jacking system, a plurality of movable supports passes from the working deck structure to said one or more support main structures so, that said one or more support main structures support the weight of the main working deck structure while replacing one or more of said plurality of support columns. Said one or more support columns, replaceable to said one or more support main structures, are defined as support columns not supporting the weight, and the rest of a plurality of support columns, not replaceable to said one or more support main structures, are defined as support columns supporting the weight. After assembling of jacking system with auxiliary structure, the support columns not supporting the weight are being removed from water in required position, support columns supporting the weight together with said one or more support main structures via movable supports support the working deck structure.EFFECT: technical result is supporting of the jacking assembly, simple dismantling for reusing after drilling required wells.10 cl, 9 dwg

Jacking system with support structure // 2607489
FIELD: mining.SUBSTANCE: group of inventions relates to jacking systems for drilling and production at sea areas exposed to icing. Jacking system with support structure comprises a working deck structure, a plurality of support columns movably connected to the working deck structure, cantilever arranged on the working deck structure, drilling derrick located on the cantilever, two or more support main structures, located on the sea bottom and a plurality of movable supports, each of which is rigidly connected to the working deck structure. Working deck structure, and a plurality of support columns, cantilever and drilling derrick form a jacking drilling assembly. Method consists in the fact that during assembling of the jacking system with support structure, a plurality of movable supports pass from the working deck structure to the upper surface of said two or more support main structures, and a plurality of support columns support the jacking drilling assembly, and after assembling of the jacking system with support structures, said two or more support main structures support the working deck structure via the movable supports, and said plurality of support columns is being removed from water in required position.EFFECT: technical result is supporting of the jacking assembly.8 cl, 9 dwg

Gravity-pile platform and method of its placement on sea bed // 2606484
FIELD: construction.SUBSTANCE: group of inventions relates to hydrotechnical construction and can be used for creation and operation of offshore pile-gravity platforms for exploration of continental shelf hydrocarbon resources. Platform comprises superstructure, body with foundation, equipped with slots in form of direct correct cylinder, through which piles are installed. At that, piles are equipped with heads in form of inverted truncated regular cones with base diameters, smaller than diameter of slots in foundation, mounted on piles buried into slots with head cone base gradient above slot top.EFFECT: technical result consists in improvement of platform stability and reduction of materials consumption.10 cl, 5 dwg
ethod of engineering protection of floating production platform from ice effects under conditions of arctic shelf // 2604888
FIELD: construction.SUBSTANCE: invention relates to construction of hydraulic structures and can be used for creation of an enclosure, designed to protect the production floating platform under ice conditions of Arctic Shelf. Method comprises fitting a protective enclosure along the platform perimeter. Prior to fitting the platform in a design position along the platform perimeter, at least, one row of supports from metal piles of round section, buried in unstable bottom sediments or bedrocks are installed with clearance. Coolers are mounted in the piles and artificial freezing of water and ground around piles is performed, monolithic cylinders formed around piles: ice-ground - in the base and icy - in water, should contact with adjacent cylinders, forming continuous ice and ground in the base and icy in water protective anti-chock and impervious wall. Prior to said wall there is another row of supports from metal piles of round section, which is equipped with rotary cutters along the outer diameter.EFFECT: technical result is improved efficiency and reduction of labor input of the method of engineering protection of floating production platform from ice effects under conditions of Arctic Shelf.1 cl

Gravitational foundation // 2604523
FIELD: mining.SUBSTANCE: group of inventions relates to mining and can be used as gravitational foundation of sea platforms. Disclosed are versions of the gravity foundation, which comprises first and second elongated foundation sections, separated by open area and made to support weight in water of the said gravitation foundation on sea bottom, and the upper section, arranged above said open area and made with possibility of passage, at least, partially above water surface to support upper plants. Some implementation versions additionally comprise first and second inclined sections connecting the foundation sections to said upper section. According to certain implementation versions, the gravitational foundation comprises a skirt below the foundation sections to facilitate interaction with sea bottom and a pipeline system, made to transfer fluid into compartments or from the compartments to facilitate installation of the foundation on sea bottom or separation from the sea bottom. According to certain implementation versions, the gravitational foundation comprises inner chambers, selectively filled with fluid medium to facilitate surfacing and submersion into sea and displacement of the gravitational foundation.EFFECT: technical result is higher reliability of gravitational foundation during its transportation and operation.20 cl, 18 dwg

arine self-propelled self-elevating crane vessel // 2603423
FIELD: ship building.SUBSTANCE: invention relates to ship building and can be used to create self-elevating crane vessels, optimized for performing construction and erection works at offshore oil and gas production facilities. Marine self-propelled self-elevating crane vessel comprises hull and support-elevating device with three supports, with has shoes and portals with lifting mechanisms, as well as full revolving hoisting crane. Hull is made with ship hull lines. Surface part of hull in aft is made with onboard lugs-sponsons, which are interconnected by strong volumetric structure, superstructure. In onboard lugs-sponsons recesses are made to accommodate supports shoes. In hull aft part two supports are mounted at ship sides on said lugs-sponsons so, that in travel position shoes of said supports are arranged above waterline and recessed in said recesses in lugs-sponsons, and middle support is mounted in ship hull diametrical plane. Lifting crane is mounted with possibility to rotate its rotary part around central support.EFFECT: enabling expanded operational functionality of self-elevating crane vessels.1 cl, 6 dwg

Off-shore self-elevating platform // 2603421
FIELD: hydraulic engineering.SUBSTANCE: invention relates to hydrotechnical structures and can be used during development of offshore drilling self-lifting installations intended for operation under ice conditions. Offshore self-elevating platform comprises body and three or more support columns with step hydraulic lifting mechanisms and pads. Pad and icebreaker are mounted with possibility of movement and fixation relative to supporting column in required position in height by vertical brackets installed on them. In upper parts of brackets controlled lock mechanisms are installed to fix ice-breaker at ice waterline level and pad fixation at level, required for design supporting column penetration into soil. In ice-breaker housing recesses are made for pad brackets passage. Ice-breaker brackets are shifted relative to pad brackets along circumference. Each support column is provided with additional holes for ice-breaker fastening relative to latter.EFFECT: enabling possibility of platform operational capabilities expansion by enabling operation under heavy ice conditions with simultaneous reliability and safety improvement.6 cl, 9 dwg

Offshore ice-resistant process platform // 2603340
FIELD: machine building.SUBSTANCE: ice-resistant offshore platform includes above-water section 1 with horizontal process platform 2 from above, communicated with underwater part 3, made in form of displacement-type hull, anchor retention system, ballast tanks 8 arranged in displacement-type hull. Above water part 1 in area of ice waterline 9 is made in form of ice breaking cone 10, facing by narrowing downwards. Underwater part 3 upper section 11 is made in form of cone, facing by narrowing upwards. Ice-resistant platform hull is made leak-tight, with possibility of complete immersion under water. Ballast tanks 8 are made with equal volume and arranged symmetrically relative to ice-resistant platform hull 15 longitudinal axis of symmetry, and their total volume should not be less than value, defined from expression Vb.c.=Pv.p.-Pt.l., where Vb.c. is ballast tanks total volume, m3; Pv.p. is buoyancy force acting on ice-resistant platform hull, at its full submersion, t; Pt.l. is total platform immersion winches traction, t. Anchor retention system comprises anchors 5, which by ropes 6 are connected to anchor winches 7 arranged in displacing hull, uniformly along its perimeter. Platform is equipped with additional anchor system, containing anchors 12, which by ropes 13 are connected to immersion winches 14, installed in displacing hull symmetrically relative to its longitudinal axis 15 at equal distances from each other. Hull bottom 18 is rounded and symmetrical relative to its longitudinal axis of symmetry 15.EFFECT: ensuring platform operation safety at ice fields movements onto it with thickness exceeding 10 m, due to platform immersion below ice fields (icebergs) underwater part.1 cl, 2 dwg

Protective structure for riser self-lifting platform // 2596005
FIELD: machine building.SUBSTANCE: invention relates to marine drilling platforms and can be used for protection of a riser. Protective structure of a riser self-lifting platform comprises multiple receivers of connectors, arranged on housing of self-lifting platform. Tubular sleeve, which is a hollow structure, provides for passage through it of riser, wherein section of tubular sleeve is located below water level. Support structure is connected with tubular sleeve to ensure support for tubular sleeve. Each of multiple connectors is connected with one of multiple receivers of connectors.EFFECT: possibility of protecting riser from of loads on side of sea water or ice.14 cl, 22 dwg

Offshore production platform // 2593278
FIELD: shipbuilding. SUBSTANCE: invention relates to ship building, namely, to design of floating marine structures. Offshore production platform with solid smooth deck installed on ground of water area bed consists of unified floating sections resting on posts. At that, stands are interconnected by locks and are equipped with ballast tanks, ballast systems. Also stands of floating sections are made of separate standard units, connected with bodies sections and interconnected threads, and along edge of side surface of units there is groove. EFFECT: technical result consists in increase of useful area of platform, reduction of costs for cleaning of fouling and restoration of protective colour, reduction of platform displacement due to disturbances. 1 cl, 3 dwg

Self-lifting floating drilling platform with low draft // 2589237
FIELD: machine building.SUBSTANCE: invention relates to hydraulic devices, particularly, to floating powered self-lifting drilling platforms for exploration of hydrocarbon deposits on shallow sea water areas. Self-lifting floating drilling platform with low draft includes housing with upper deck, bottom, side walls equipped with along all or part of side walls outside body compartments buoyancy, does not reach upper deck, and supports with lifting mechanism. Bottom surface of buoyancy compartments is recessed on 0.3…0.5 m below bottom of self-lifting drilling platform. Buoyancy compartments are made detachable. Outer perimeter of buoyancy compartments is oval in their lateral cross section.EFFECT: reduced yield, higher buoyancy and sea platform characteristics, reduced load on support platform, prevention of damage to the bottom of platform, reduced windage and catchment area in case of precipitation.1 cl, 3 dwg

Ice worthy jack-up drilling unit with pre-loading tension system // 2583467
FIELD: drilling soil or rock.SUBSTANCE: invention relates to jack-up rig of ice class, which can be used to extend season of drilling in shallow waters off coast of Arctic or in places subject to ice. Jack-up rig of ice-class for drilling for oil and gas comprises a floating body having an arch shape of ice at bottom of which extends from housing area near level of deck and down near bottom of hull. Jack-up portion of ice deflector includes at least three supports arranged to lift from seabed. Also jack-up rig climbing system comprises means, coupled to each leg as a lifting support from seabed and down for pushing supports to seabed and pushing up housing with partial exit of water. Jack-up system includes tension, including an anchor to create more force downwards. Said system pushes support to seabed and has a resistance to movement which can cause ice. A method of drilling can be carried out using a jack-up rig, in which each support is lowered so that bottom supports shoes come in contact with seabed and lift up housing and completely out of water when ice does not threaten rig.EFFECT: technical result consists is holding very large weight and high capacity of resistance forces action ice in year-round period.26 cl, 6 dwg

obile drilling rig // 2579162
FIELD: mining.SUBSTANCE: group of inventions relates to the extraction of hydrocarbons in the Arctic. Mobile drilling unit comprises an upper element, where a derrick is located, and which is capable of being transported afloat to a different wellsite and to releasably connect to the tower member located on the base member of the foundation element. Said tower element has a portion extending above the expected level of ice, and the foundation member with an option of ballasting or deballasting so that it can be transported afloat to the installation site. Upper element comprises a rack put forward to lift the upper element of water and lower it into the water and is adapted to fix the top of said tower element so that the advancing rack can be raised from the water after connecting the top element to the tower member.EFFECT: provides strong opposition to cross ice drift.14 cl, 7 dwg

Foundation equipped with skirt for introduction into soft material // 2574666
FIELD: construction.SUBSTANCE: group of inventions relates to jack-up drilling platforms in general and to a foundation, which may be used for a jack-up drilling platform, in particular. A foundation 10 equipped with a skirt, designed for installation onto a sea bottom with quite soft material above the bed of the base, comprises a shoe support 12, having an upper part and a foot 16, and a skirt 20, having an upper edge, which is connected as an integral part with the shoe support 12 and protrudes down, surrounding the foot 16, and a lower edge 25 for introduction into the sea bottom. The upper part and the foot 16 are connected along the perimeter and form an outer edge 14, besides, both the upper part and the foot 16 have flat or conical configuration. One support 40 of the jack-up drilling platform is installed on the upper part. The foot 16 has a flat base or a descending slope. The skirt 20 contains multiple circumferential holes 22, which adjoin the foot 16 of the shoe support 12 and arranged within the upper half of the skirt 20 height. Configuration of holes 22 provides for release of soft material from inner space defined by the skirt 20 and foot 16, during foundation 10 submersion into the sea bottom, at the same time the soft material is not gripped inside the foundation 10 equipped with the skirt. The foundation 10 equipped with the skirt is made as capable of introduction into the bed of the base for efficient depth. The jack-up drilling platform comprises a working platform, multiple supports 40 and multiple foundations 10 equipped with the skirt given above. Each support 40 has two ends, one of which is connected to the working platform to ensure support, and the other one - with one foundation 10 equipped with the skirt, so that foundations 10 equipped with the skirt provide for fixation and support of the jack-up drilling platform. The method to install the foundation 10 equipped with the skirt designed for installation on the sea bottom with quite soft material above the bed of the base, contains foundation slope into the soft material on the sea bottom and simplified release of soft material from the inner space, defined by the skirt 20 and foot 16, via multiple circumferential holes 22, thus increased capacity of the foundation.EFFECT: group of inventions provides for increased bearing capacity of a jack-up drilling platform and a foundation equipped with a skirt.25 cl, 3 dwg

Protective structures of water separating column // 2574640
FIELD: construction.SUBSTANCE: protective structure of a water separating column for self-lifting drilling rigs comprises several supports, an upper module containing the main protective pipe for the accommodation of the water separating column, several bushes located around the main protective pipe and installed on the supports, and connecting fittings connecting the named several bushes connected among themselves and to the main protective pipe. The protective structure also contains the lower module comprising several tubular guides for guiding and subsequent fixing of the supports and a connecting structure. The named several supports are rigidly fixed at the sea bottom, providing the required support of the upper and lower modules in the assembled state.EFFECT: strengthening of protection of the water separating column against shock impact, in particular from impacts of ice floes or vessels.8 cl, 5 dwg

arine platform for controlled hydrocarbon localising // 2574484
FIELD: oil and gas industry.SUBSTANCE: invention is referred to the concept of controlled oil and condensate localising, as well as other types of liquids and chemical reagents in structures at potential failure of common known barriers used for marine prospecting and production of oil and gas, which are intended for usage at offshore depths. The marine platform consists a load-bearing structure; deck superstructure mounted on top of the load-bearing structure from where drilling may be performed, at that the load-bearing structure comprises collecting tanks forming an integrated part of the load-bearing structure; basis for the platform intended for support at the sea bottom and several interconnected buoyant hulls mounted on top of each other supported by the platform basis and pressed to it under own weight. The buoyant hulls are also interconnected with the platform basis by means of vertically stretched wire ropes at even intervals along periphery of the platform. Multitude of anchoring wire ropes passing up and down from the upper part of the platform is fixed by anchors at the sea bottom at distance from the marine platform. The anchoring wire ropes are coupled to the marine platform through fixed pulleys and winches.EFFECT: provided strength, stability of the marine platform capable to withstand impact on natural forces occurring at the installation site.10 cl, 12 dwg

Systems and methods for underwater noise reduction // 2574427
FIELD: oil and gas industry.SUBSTANCE: group of inventions is referred to marine systems and methods for development of offshore oil and gas fields. The marine system in the basin comprises a drill unit at the basin surface, a drilling bit in a well at the basin bottom, the area with sensitive environment at distance from the well, and multitude of floating flexible constructions deployed between the well and the area with sensitive environment, at that the floating flexible constructions are flat hoses mounted in uninflated rolled position and further they are inflated and erected into vertical position. The method for development of offshore oil and gas field includes mounting of a drill unit in basin, drilling multitude of wells by the above drill unit and placing multitude of the floating flexible constructions close to the well, at that the floating flexible constructions are flat hoses mounted in uninflated rolled position and further they are inflated and erected into vertical position.EFFECT: reduced noise pollution of underwater environment and reduced impact on marine flora and fauna.25 cl, 5 dwg

Jack-up drilling offshore unit of ice class with gas mixing and ice-reinforced screens for support legs // 2573372
FIELD: oil and gas industry.SUBSTANCE: invention is related to the sphere of drilling equipment. The jack-up drilling offshore unit of ice class with gas mixing comprises a floating hull, an area of ice deflector, support legs of truss structure, jack-up mechanism, ice-reinforced screens for support legs and gas system for water mixing. The floating hull has smooth deck in the upper part and ice-deflecting pattern in the lower part. The area of ice deflector passes along perimeter of the hull bottom. Support legs are designed for recovery from the bottom. Jack-up mechanism my recover support legs from the bottom in order to push the hull from water. Gas system is designed to mix water in order to reduce ice-related problems close to the support legs.EFFECT: prolongation of drilling season is ensured in shallow water near the Arctic shore or at placed subject to ice formation.20 cl, 6 dwg

Self-elevating drilling offshore unit of ice class with single conic pile-supported leg // 2573301
FIELD: oil and gas industry.SUBSTANCE: invention relates to extraction of mineral resources and may be used for drilling of oil and gas wells. The drilling system comprises a drilling unit and single conic leg. The drilling unit is comprised of a floating hull with ice deflector section, self-elevating legs and self-elevating device. The hull has ice-deflecting shape. The self-elevating device is designed to lift legs from the sea bottom and push them downwards to the sea bottom. A single conic leg is fixed to piles. Piles are driven into the sea bottom. Inclined surface of the conic leg comes in contact with ice around the hull.EFFECT: potential extension of drilling season in areas exposed to ice impact.27 cl, 8 dwg

Device to protect supports of stationary marine engineering structures against external ice impact // 2572344
FIELD: construction.SUBSTANCE: device comprises a protective band structure made in the form of a truncated cone to damage ice with bending down, on the contact surface of which there are pyramidal ledges, which create local concentrators of ice damage in the ice field. Angles of base tops near upper pyramidal ledges are more than angles of base tops of the lower pyramidal ledges. The protective band structure belts the support along height only at the level of the ice belt.EFFECT: invention provides for protection of supports of stationary marine engineering structures against external ice pressure by means of considerable reduction of global ice loads.2 cl, 2 dwg

arine ice-resistant platform // 2571912
FIELD: construction.SUBSTANCE: marine ice-resistant platform comprises a superstructure connected to a support base by means of support pillars, on which along the platform perimeter in the area of ice load impact there is a closed anti-icing barrier mounted, which covers support pillars along their outer circuit, in the form of an inclined fin. In the upper part of the fin there is an additional ice-protection inclined belt, which is aligned oppositely to the inclined ice fin and is arranged at the angle of 8…10°. The ratio of additional inclined belt height to inclined fin height is at least 0.08. The closed ice barrier comprises a barrier wall with a set of stiffening ribs and a device for heat transfer and circulation of coolant, made in the form of channels arranged in the space between specified stiffening ribs and formed by at least two tight cavities, one of which is designed for coolant circulation, and the other one - for air circulation. The cavity for air circulation adjoins the inner surface of the ice barrier wall. The cavity of the air insulation is formed by an adjacent partition between both cavities and a cover installed on shelves of stiffening ribs of the specified ice barrier. In the coolant circulation cavity there are heat release elements installed as longitudinal to the flow and rigidly fixed to the barrier wall. The inclined fin of the closed anti-icing barrier has a vertical zigzag-shaped profile. The additional inclined belt is smoothly coupled with the inclined fin made with the vertical zigzag profile, and in its upper part the additional belt is made in the form of a hemisphere, edges of which are bent downwards and aimed oppositely to the inclined fin with the vertical zigzag-shaped profile. Sharp faces of the inclined fin with the vertical zigzag-shaped profile provide for ordered motion and wedging of ice approaching the platform and help to break it. Use of the inclined fin with the vertical zigzag-shaped profile increases its strength and stiffness, and accordingly reliability of anti-icing barrier.EFFECT: increased strength, stiffness, reliability and efficiency of operation and safety of a marine stationary platform under ice conditions.2 cl, 6 dwg

Self-lifting marine drilling ice-breaking-class platform with icing ruled out by gas mixing // 2571782
FIELD: oil and gas industry.SUBSTANCE: claimed platform for drilling under coastal sea ice conditions comprises the hull with relatively smooth deck at its top part and ice bending shape at its bottom part extending downward and inward around the hull perimeter. The ice bending shape extends from the hull area nearby the deck level to extend downward to the area nearby the hull bottom. The ice deflector section extends around the hull bottom perimeter to force the ice around the hull and not under the hull. Besides, this platform comprises three supports arranged inside the hull bottom perimeter. Note here that said supports can be lifted from the sea bottom to tow the drilling rig in shallow waters and be extended to sea bottom and, additionally, can be extended for lifting of the hull partially or completely from water. Self-lifting device is connected with every support to lift the support from the sea bottom to allow floating of this platform and to push the hull completely from the water when there is no ice. Besides, said platform comprises the gas system for mixing of water nearby the supports and reduction of problems related with the ice nearby the supports.EFFECT: higher reliability of operation, fine resistance to ice effects all the year round.19 cl, 4 dwg

Truss system of slab against vertical rocking for marine foundation // 2571049
FIELD: construction.SUBSTANCE: marine foundation (2) and method of slab lowering (28) are proposed against vertical rocking of a floating marine foundation (2). The marine foundation (2) comprises a floating structure (4, 6), a truss assembly (7) connected to the floating structure, and a thick (28) against vertical rocking, connected to the truss assembly. The floating structure includes a pontoon (6), located at least partially above water surface, where the marine foundation (2) is located; and at least three vertically arranged columns (4), connected with the pontoon (6) and having a large cross size compared to the pontoon connected to the column, which provides for partial displacement of the pontoon. The truss assembly (7) includes at least three separated walls (8), movably connected to the columns (4). Each wall (8) of the truss comprises at least two vertically arranged legs (10); the first leg (10) of the first wall (8), movably connected to any column (4), does not depend on the first leg (10) of the second wall (8) of the same column (4); and a cross-like fixture between at least two vertically arranged legs (10) of each truss wall (8). In the method of slab (28) lowering against vertical rocking of the floating marine foundation (2) they lower each wall (8) of the truss, forwarding at least two vertically arranged legs (10) of the wall (8) of the truss at the section of pontoon displacement, and they maintain at least two vertically arranged legs (10) of the truss wall (8) from the pontoon (6) in the lowered position regardless of legs (10) of the adjacent truss wall (8).EFFECT: invention provides for stability and structural integrity of a structure.13 cl, 10 dwg

Hydraulic structure with vertical profile on pile base and method of its erection // 2568497
FIELD: construction.SUBSTANCE: method of construction of the structure includes the installation of the metal conductors (MC) and vertical piles with their subsequent immersion into water area bed ground, supply of concrete mix for formation of the bearing supporting framework in the form of the monolithic concrete block (MCB) 8. From the coast towards the high sea on underwater coastal slope into the ground 10 of the water area bed 11 on the structure axis MCs are installed permanently one by one which for the whole period of construction and operation of the structure are fixed. At first the first MC is permanently installed with external metal protection in the form of the flexible rod holding device (FRHD) forming internal space of MC it is filled with large stones or concrete figured elements 16, then at the distance 0.4-0.6 m from its external perimeter the formwork is installed. The concrete mix is supplied into the internal space fenced with the formwork and the first MC is made monolithic, except internal cavity of its vertical metal pipes (VMP) 2. The concrete mix is held until curing, and after achievement by concrete of pre-set strength in the internal space, fenced with formwork, the first monolithic concrete block (MCB) 8 is formed with the top mark 0.6-2.0 m with reference to the sea level which is a structure component. From the surface of the first MCB 8 through internal cavities of VMP 2 one by one the anchoring piles 7 are installed, moving them through the body of the first MCB 8 after its erection, and under it the anchoring pile base is formed which fixes the first MCB 8 from movement by wave influence after its erection. The top head part 12 of anchoring piles 7 in equal in strength manner and rigidly are fixed in the internal cavity of VMP 2 with the internal surface of these pipes by means of plate-type metal inserts. The gap between the piles and internal surface of metal pipes, and also head parts of piles in places of their fixing in internal cavities of VMP 2 is filled with fine-grained concrete to provide stability of MCB 8. At the distance 0.4-0.6 m from the first MCB 8 the following second MC is installed on water area bed with external metal fencing in the form of FRHD. The named operations of the method are performed similar to the construction of the first MCB 8. The second MCB 8 is formed with the top mark 0.6-2.0 m with reference to sea level. In the same sequence the construction of the following MCB 8 is performed until formation of the row of the monolithic concrete blocks 8 installed on the anchoring pile base and which are the components of the whole hydraulic structure with vertical profile. In the inverse sequence, starting from the last in the row MCB 8 installed on the anchoring pile base towards the coast the concrete or ferroconcrete superstructure 19 is erected on which if necessary the storm wall 20 is installed, and on the underwater coastal slope from various grounds, including from easily washed away incoherent soil, the stationary hydraulic structure with vertical profile on the anchoring pile basis is formed.EFFECT: improvement of bearing ability of the structure, its strength, reliability and resistance to washout of base ground, and to storm impact.4 cl, 7 dwg
Construction of sea terminals for extraction of underwater hydrocarbon accumulation // 2567563
FIELD: mining.SUBSTANCE: claimed method consists in erection of some sea stationary platforms, sea bottom complexes, underwater in-field and main pipelines, well products stores and unloading plants. Note here that at least one of said platforms is an underwater version with thrust unit secured to the sea bottom, thrust unit top gage being located below water level by the maximum clearance of iceberg underwater part gage. Note also that all underwater platforms are structurally and functionally connected by electric cables and condensate and gas pipelines. Regular seismic sounding is performed in the area of terminals by passive sounding of sea bottom and analysis of microseismic vibrations of the earth crust.EFFECT: higher reliability of construction and operation.
Device of anti-ice protection for hydraulic engineering structure arranged on shallow continental shelf // 2567562
FIELD: construction.SUBSTANCE: device of anti-ice protection for a hydraulic engineering structure arranged on a shallow continental shelf includes protection elements and fixing elements that connect protection elements with a water area bottom. Protective elements are made in the form of submersible multisurface pontoons with the capability of their filling by ballasting material, one face of which is made with an inclined section and is equipped with a deflector in the upper part, and other at least two vertical faces, along which pontoons are joined to each other. Pontoons form a closed structure in the form of a polygon in plan with two front walls, forming an ice-cutting wedge in its central axis, with two side walls and a rear wall with the possibility of its opening. Each pontoon is installed by a face with an inclined section and a deflector outside, forming a closed extended deflector and an inclined surface that surround the entire structure along the external perimeter. Two front walls are made at least from two pontoons in the form of symmetrical polygons extended in longitudinal direction, at least with four side faces. Side and rear walls are made from pontoons in the form of polygons at least with three side faces. The side wall is joined tightly by its side surfaces with vertical surfaces of front and rear walls. Fixing elements are made in the form of hollow piles and are installed along the entire height of pontoons of front and side walls into appropriate through holes. Metal nets of Rabitz type are fixed on pontoons, and are divided into sections by means of insulation tubes, inside of which there is a metal rod, besides, each metal rod and adjacent section of the metal section form an element generating water circulation made in the form of a pair of electrodes - cathode and anode. The cathode is made in the form of a metal rod, which is placed inside the insulation tube, along its entire length, coaxially with some distance from the inner surface of the body, and the anode is made in the form of a metal net section. The anode is made from water-insoluble electroconductive material, pairs of electrodes are connected by electric links to a source of DC, and electric connection of the anode is placed inside the insulation tube.EFFECT: increased efficiency of protection of a hydraulic engineering structure against ice.

ethod to increase bearing capacity of ice cover // 2565710
FIELD: construction.SUBSTANCE: stiffening ribs are formed on an ice cover. The stiffening ribs are created in the process of stress concentrators' arrangement on a crossing axis and preparation of through holes. Anchors are lowered into the through holes. Washers are put onto ropes fixed to the anchors, with the diameter larger than the diameter of the holes and the length of the ropes providing for sagging amplitude not more than the ice thickness. At the same time the water level changes during the sea tide.EFFECT: increased bearing capacity of the ice cover.2 dwg

Self-elevating drilling offshore unit of ice class with single conic pile-supported leg and adjusting seats // 2564711
FIELD: oil and gas industry.SUBSTANCE: system comprises the following: drilling unit having a floating hull with relatively smooth deck in its upper part and ice-bending form in its lower part passing downwards and inwards around the hull perimeter where the ice-bending form passes from the area close to the deck level and downwards to the area close to the hull bottom; area of ice deflector passing around the hull, not under the hull; at least three legs installed inside perimeter of the flowing hull bottom, at that the legs are designed to be retracted from the sea bottom in order to tug the drilling unit through shallow water as well be retracted towards the sea bottom and be retracted partially for complete or partial removal of the hull from water; and self-elevating device connected to each leg both for elevation of the leg from the sea bottom so that the self-elevating drilling offshore unit of ice class could float due to hull buoyancy and for retraction of legs towards the sea bottom when there is no ice; and single conic piled leg having the hull with supporting part at the bottom and upper deck at the top, at that the supporting part is fixed to piles driven to the sea bottom when construction of single conic piled leg is installed for usage with tilted surface that contacts ice around the hull, passing from a wider lower area to the narrower upper area where the lower area is placed below sea surface and upper area is placed above the sea surface; it includes units with adjusting seats made to receive shoe at least at one leg, fixed and kept at the same place for drilling through single conic piled leg; at that the drilling unit is made to elevate the hull over water and to drill through single conic piled leg, running down to water in order to transit into position of ice protection, at that ice may contact the ice-bending form of the drilling unit when ice is thin and the form is to be removed when ice is thick.EFFECT: protection against ice impact and interaction of the drilling unit with single conic leg.17 cl, 8 dwg

Split connection of upper deck with barge and system used to this end // 2563490
FIELD: transport.SUBSTANCE: claimed method comprises the steps that follow. Upper deck of definite weight is installed nearby one or several barges with the system of load-bearing carcass. Note here that said load-bearing carcass system has assembly for upper deck fastening. Upper deck weight portion is carried to one or several barges. Upper deck weight is supported in vertical by load-bearing carcass and connects in cross-wise direction said upper deck with fastening assembly at load-bearing carcass system at one or several barges. Upper deck is secured in vertical with the system of load-bearing carcass by fast-release joint at application of tensioning force to upper deck irrespective of supporting the upper deck by load-bearing carcass. Upper deck and one or several barges are transferred to sea platform. Relative vertical mark between upper deck and sea platform is adjusted. Parts of upper deck weight are carried to sea platform. Upper deck is detached in cross-wise direction from fastening assembly at load-bearing carcass on every barge. Upper deck is detached in vertical from load-bearing carcass to actuate the fast-release joint system. System to install upper deck onto sea platform including: platform upper deck of definite weight resting on one or several barges with the system of load-nearing carcass, each being provided with upper deck attachment assembly. Note here that load-bearing carcass can support in vertical upper deck weight. Upper deck is installed in cross-wise direction from fastening assembly at load-bearing carcass on every barge. Means of fastening in vertical of upper deck to load-bearing carcass system by fast-release joint system irrespective of support of upper-deck weight by load-bearing carcass. Upper deck is detached in cross-wise direction from fastening assembly at load-bearing carcass on every barge. Upper deck is detached in vertical from load-bearing carcass to actuate the fast-release joint system.EFFECT: creation of system with the platform upper deck that can be retained in vertical by released synchronously at resting on sea platform during installation.22 cl, 9 dwg

ethod of consolidation of soil base of hydraulic engineering structure // 2558442
FIELD: construction.SUBSTANCE: invention relates to the field of hydraulic engineering. The method provides for submersion of the structure by acceptance of the ballast by the structure and placement of the structure base onto sea bottom. For this purpose on the sea bottom outside the area of structure placement they install electrodes, which are connected to a negative pole of a DC source. The structure is submerged by ballasting of the platform body to provision of the rated contact of the platform body foundation foot contact with the sea bottom. Afterwards the element of the facility structure is connected to the positive pole of the DC source, and electric current is sent, providing for generation of lower water saturation of soil in the area of foundation interaction with the soil base, providing for consolidation of the soil base of the platform, upon completion of which the electric current is switched off. As a result of physical and chemical processes taking place under action of DC, around the anode under the structure body there is an area of lower water saturation, and near the surface of the cathode moisture increases, and the area of higher water saturation of the soil is created outside the area of the gravity structure. Free water accumulated around the cathode may be removed with the help of a needle filter.EFFECT: substantial acceleration of soil consolidation process, which may take place just within a few days, and increased soil strength, which provides for increased stability of a structure with smaller weight and dimensions of the structure and smaller amount of ballast.7 cl, 3 dwg
Sea floating platform // 2556408
FIELD: transport.SUBSTANCE: proposed platform comprises submerged displacement module to support surface module by stiff support columns with bracing elements and tightening links secured at sea bottom anchors. Support columns with said bracing elements can be detached from submerged module to allow fast escape of the platform from ice-dangerous area and return to left point. Submerged module is composed of separate sealed pontoons interconnected by stiff links for mutual relative displacements. Said support columns are provided with mechanisms for coupling with submerged module pontoons for interlocking of said modules. Surface module load-bearing hull is provided with flexible guard arranged along its edges to create air cushion with receiver. Said guard is arranged at board hoop skirts secured to said hull Surface module comprises pressure and propulsive complexes with main engine with drives and aircraft variable-pitch propellers arranged in adapters.EFFECT: faster escape of the platform from ice-dangerous area and return to left point.

Jack-up drilling rig with two derricks for operation under ice conditions // 2555976
FIELD: oil and gas industry.SUBSTANCE: group of inventions relates to the jack-up drilling rigs and to drilling methods at shallow waters with possible ice presence. The jack-up drilling rig contains floating hull with top deck; part of the floating hull for ice bending projecting downward from the deck perimeter and tapering inside; edge reflecting ice projecting vertically downward from bottom perimeter of the above mentioned part for ice bending to direct ice around the above mentioned floating hull, not under it; supports arranged inside the perimeter of the above mentioned floating hull; jack-up device connected with each support; two derricks installed on the deck. Two specified derricks are located from one horizontal side of the specified deck relatively to the first central line of the deck and at opposite horizontal sides of the specified deck relatively to second central line of the deck perpendicular to the first central line of the deck, or at opposite sides of the specified deck at similar distance from the deck centre, at that the specified first central line is parallel to the longitudinal axis of the specified derricks. Drilling method at shallow waters with possible ice presence includes: a) provision of the specified jack-up drilling rig; b) lowering of each support to sea bed and hull lifting from water, if ice is not dangerous for the rig; c) floating hull lowering on water with anti-ice configuration such that shape for ice bending projects above and below sea surface for break or removal of ice approaching the rig, if ice is dangerous for the rig; d) drilling using both derricks during steps b) and/or c).EFFECT: technical result is increased efficiency of exploration and extension of the drilling season at places with possible ice presence.14 cl, 8 dwg

arine gravity platform with embedded foundation // 2555174
FIELD: construction.SUBSTANCE: platform comprises a body, a foundation part with a bottom slab equipped with ribs embedded into the foundation soil. At the same time the foundation in its lower part along the entire perimeter at the outer side is equipped with ploughshares with depth of submersion and distance between them determined on the basis of the given expression. The ploughshare width is also made from the mathematical expression.EFFECT: reduced material intensity in development of a marine gravity platform, reduced volume of ballast for provision of ribs embedding into the foundation soil, increased stability and bearing capacity of the soil foundation, increased reliability and reduced risk of loss of gravity platform stability during the period of operation under action of combined external impact of loads.4 cl, 6 dwg

Installation of submersible supporting structures // 2543835
FIELD: construction.SUBSTANCE: installation method of a supporting structure at sea or river bottom, in which a supporting structure is installed, which is capable of standing independently for some time, being rather heavy to be retained in position by friction at sea or river bottom, before operations are performed which are required for constant fixture of the supporting structure at sea or river bottom and during their performance. The above structure includes a variety of anchoring points intended for interaction with supporting devices having a possibility of their position control and contacting to the sea or river bottom. Besides, each of the above said devices has a possibility of receiving and setting to the specified position of anchors. The method involves the following stages, at which transportation of the supporting structure and its submersion to the sea or river bottom is performed by means of an installation ship. It involves the stages, at which the supporting structure is installed at the specified level and with the specified orientation relative to the sea or river bottom by means of supporting devices. Anchorage of the supporting structure is performed to the sea or river bottom with anchors by means of devices supported from the supporting structure in order to ensure possible manipulation of anchors and their submersion.EFFECT: providing reliability of a structure; reducing material consumption and labour intensity.17 cl, 10 dwg

Locking system of platform lifting mechanism // 2541309
FIELD: transportation.SUBSTANCE: proposed invention relates to the field of locking, fixing systems of lifting mechanisms of self-lifting platforms, having a body with portals and supports with geared racks. The locking system includes a fixing device. The fixing device is made in the form of two frames that are independent and symmetrical relative to the geared rack and guide elements that are rigidly fixed on them. Frames are made as capable of vertical displacement by means of jacks installed on the portal. Teeth are fixed on the frames by means of jacks. To provide for the possibility of horizontal displacement of teeth each frame is equipped with a traction rod. Connecting rods are mounted on a traction rod, being connected with it via a shock absorber. Each connecting rod is connected to one of frame teeth.EFFECT: provides for increased reliability of system functioning.5 dwg

Technological complex for erection of hydraulic engineering work // 2540602
FIELD: construction.SUBSTANCE: invention relates to devices for the performance of works in hydraulic engineering construction and can be used for erection of bridge pile foundations, platforms, transhipping complexes and berthing facilities in water areas. A technological complex for the erection of a hydraulic engineering work (HEW) comprises a working platform 1, a set of tools for its erection. The HEW includes the pile piers 2 with a grillage 3 mounted on them, made of slabs. The service platform 1 is designed in the form of a longitudinal horizontal building slipway, equipped with equipment and assembly elements for the installation of HEW. The set of tools for the erection of the HEW includes a lifting device, a device for mounting the pile supports of the HEW foundation with the section buildup of the HEW grillage openings and a module of final assembly works. The lifting device is designed as a crane for heavy loads 5. The device for mounting the pile supports includes an aligning frame 6, aligned by the crane 5 to the horizon on a design axis by length and width of the span, with an external conductor 7 mounted on it. One end of the aligning frame 6 is installed on a transverse metal girder 8 of the HEW span already mounted, and the second external end is installed on two pairs of support columns 9 and 10 provided with hydraulic actuators. The first pair of the support columns 9 is installed on the ground of bottom vertically, and the columns of the second pair 10 are installed at an angle of 15-20° to the vertical columns 9. The conductor 7 is provided with apertures 11 designed in the form of sleeves to arrange the pile piers 2 in the design position by means of the crane 5 with subsequent their immersion with precast shell to the desired depth into the ground of the bottom and by fixing with retainers disposed in the apertures of the conductor 7. At the upper ends of the pile piers 2 there is a transverse metal girder 8, mounted by the crane 5 and fixed by a weld joint. Metal orthotropic plates 4 are installed and fixed by weld joints on the transverse girders 8 of the HEW sections already mounted and remounted. At the ends of the transverse metal girder 8 of the HEW span already mounted, a pair of temporary support jacks for supporting the additional support pairs of columns 13 and fixed by a weld joint, is provided. The additional support pairs of columns 13 are designed integrally with the conductor frame 6 and arranged in pairs on its bottom side along the longitudinal beams 12 with a step in accordance with formula: l = L / (n + 1), where l - distance between the pairs of additional support columns, L - length of the conductor frame, n - number of pairs of additional support columns.EFFECT: expansion of arsenal of hardware and trouble-free operation when changing the length of spans, reduction of construction terms and reduction of the work complexity.3 cl, 1 dwg

Cast-in-situ concreting method of sea platform // 2536520
FIELD: construction.SUBSTANCE: invention relates to erection of cast-in-situ structures in difficult-to-access areas, and namely to cast concrete mixtures for cast-in-situ concreting of building structures. A cast-in-situ concreting method of a stationary sea ice-resistant platform involves preparation of concrete mix by mixing of dry components: a binding agent - Portland-slag cement, quartz sand, granite crushed stone with fraction of 5-20 mm, fine crushed mineral filler - MP-1 powder, with water and additives - a plasticising agent based on polycarboxylates - Muraplast FK-63 and hardening retarder - Centrament Retard 390, till concrete mix of cast consistency with cone spread of 50-70 cm is obtained, and with delamination of not more than 0.4% and with preservation capacity of at least 3 hours, supply of concrete mix to a framework with a concrete pump at flow rate of 2500-3000 l/h, and hardening is performed under normal conditions during 28-60 days, at the following component ratio, wt %: Portland-slag cement 13.3-16.9, quartz sand 42.4-42.6, the above said crushed stone 25.3-27.9, mineral powder MP-1 6.6-6.8, the above said plasticising agent 0.1-0.2, the above hardening retarder 0.07-0.08, and water is the rest.EFFECT: providing viscosity and preservation capacity of concrete mix at its supply, and improving concrete crack resistance.4 tbl

ethod to erect ice-resistant platform // 2534292
FIELD: construction.SUBSTANCE: method includes deepening and installation of an underwater part of the structure into bottom deposits, fixed fastening of a hollow board to it, made in the form of a ball segment with perforated surface. During assembly of the board its upper part is placed above the surface of the ice cover, and the base is submerged into water. Supply-and-exhaust shafts and tight hatches are placed into the cavity of the board. The underwater part of the platform is equipped with transition gateways and joint assemblies. A tunnel is installed from the platform to the coast, and in it they install a pipe canal, tight partitions, additionally it is equipped with transition gateways, joint assemblies. The tunnel is used as a permanent transport link and moorage for underwater vessels.EFFECT: increased reliability of operation of hydraulic engineering structures of island type in Arctic seas.1 dwg

ethod of engineering protection of fpu platform from ice events in conditions of arctic shelf // 2532941
FIELD: construction.SUBSTANCE: method includes the installation along the platform perimeter of the protective cladding structure. Meanwhile before placing the platform into design position along the platform perimeter with a clearance at least one row of supports from metal piles with round section sunk into unstable bottom sediments or into bed rocks. Into piles the coolers are mounted, and artificial freezing of water and ground around piles, and the monolithic cylinders, formed around piles - ice and grounding in the base and icy in water, shall contact the adjacent cylinders, forming continuous ice and ground in the base and icy in water protective anti-chock and impervious wall.EFFECT: improvement of efficiency of an engineering protection of platforms of a floating type in conditions of the Arctic shelf.6 cl, 3 dwg

ounting of screw-fit pile anchor // 2531694
FIELD: oil-and-gas industry.SUBSTANCE: invention relates to development of oil and gas deposits and can be used for anchoring of mining equipment at sea bottom. Proposed method comprises fitting the pile anchor in place by screwing the cylinder in soil, well drilling via wellhead, lowering of reinforced well casing in the well and cementing the string inner space. Note here that casing pipe is pre-furnished with lengthwise sawcuts. Prior to cementing of casing string, charge is lowered to 1.5-2.0 m from well bottom to explode its so that inverted plume is formed in the area if sawcuts as well as cavities in soil to be filled with concrete.EFFECT: higher reliability of retention.3 dwg

Sea gravity platform // 2530921
FIELD: transport.SUBSTANCE: proposed platform comprises hull with main deck with crew quarters, process and general ship equipment, device to discharge oil products to tankers, copter deck and riser shaft at platform centre. Crew quarters have closed shape and is arranged equidistant to main deck outer outline. Process equipment is located so that it is limited by crew quarter inner fire- and explosion-proof wall. Crew and working quarters are arranged along crew quarters outer wall. Platform is equipped with canopy-shape coating located above the main deck and connected crew quarters and composed by separated trapezoid-shape flaps aligned with platform centre. Canopy base flaps rests on crew quarters inner wall. Riser pit height equals that of canopy top parts and terminates in bearing platform jointed by horizontal hinged with every flap of said canopy.EFFECT: perfected performances by reducing the platform's gravity center, uniform weight distribution on the body of the platform from the residential unit and to protect the process equipment from the weather wave and wind effects.5 cl, 4 dwg

ethod of floating drilling rig movement by means of transport hovership system // 2526431
FIELD: transport.SUBSTANCE: method of drilling rig movement by means of transport hovership system includes movement over shallow waters and pulling floating drilling rig on air-cushion on slightly sloping shore. For movement over shallow waters delta anchors installed on ground using transport hovership equipment. To bring floating drilling rig on slightly sloping shore a bundle of three screw anchors is used which are screwed into ground by drilling rig located on deck of transport hovership. These anchors are joined with platform with roller block by adjustable rods. Pull winches and roller blocks are used on floating drilling rig to exit to shore. Roller block on anchor bundle platform and in floating drilling rig together with pull winch form tackle which permits to use winches with lower propulsive force for floating drilling rig pulling on anchors.EFFECT: lower energy consumption during floating drilling rig movement over shallow waters and its pulling out to solid base with insignificant slope.3 dwg

arine ice-resistant platform hull // 2522672
FIELD: transport.SUBSTANCE: invention relates to shipbuilding and concerns protection of marine ice-resistant platform hulls against external ice impact. Marine ice-resistant platform hull has reinforced, predominantly vertical, ice sheathing with stiffening set and is provided with rigid elements with triangle cross-section installed on sheathing surface and placed on its surface with creation of multiturn spiral which has generatrix inclination angle to horizon of 10÷70 degrees and spiral pitch not exceeding 1/3 of maximum ice thickness in the area of platform operation. In this system, rigid elements are installed so that horizontal plane determining upper end of spiral is above platform design waterline, and horizontal plane determining lower end of spiral is under platform design waterline where distance in height between planes of upper and lower ends of spiral is not less than 1/2 of ice thickness in the area of platform operation.EFFECT: lower ice loads on platform hull.1 dwg
 
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