Marine ice-resistant platform
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
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.
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
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
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
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.
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
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.
FIELD: oil and gas industry.
SUBSTANCE: invention is related to facilities of the continental shelf development. An offshore floating platform contains an undersea displacement module, a support subsea module with rigid support columns and binders, and straining ties fixed at seabed anchors. The support columns and binders can be detached from the undersea module in order to escape quickly from an ice-hazardous area and to return back to the abandoned place. The subsea module is made of individual sealed pontoons interconnected by rigid ties capable of limiting relative motion. The support columns of the subsea module are equipped with mechanisms for connection to pontoons of the undersea module and for interconnection of the modules.
EFFECT: improved reliability of the modules coupling/decoupling, simplified ballasting process.
6 cl, 5 dwg
SUBSTANCE: invention relates to construction of platforms to mount drilling and oil production equipment in the sea. The support stand-anchor of the marine platform comprises joined upper section with the upper support site, ballast cisterns-sections and the lower drilling section, in which there is a hydraulic engine installed, to the shaft of the rotor of which a drill is connected, and a pipeline of water drain and a nozzle of water drain are connected to the stator of the hydraulic engine. At the same time on the marine platform in the control cabin the system of filling-emptying of ballast cisterns-sections additionally comprises a compressor for compressed air, the outlet of which via serially connected first valves and three-way switching valves are connected to pipelines of compressed air supply, hydraulic pumps. Between ballast cisterns-sections there are remote support sections, the upper section is made in the form of two coaxial hollow cylinders arranged relative to each other coaxially. The upper support site by means of hinge parts rigidly connected to it and the marine platform, may rotate around the common axis of the hinged joint, and with it the entire support stand of the anchor with removal of the bolt joints by means of its transition from the vertical working position into the horizontal transport position.
EFFECT: expansion of functional capabilities of a support stand-anchor and reduction of axial load.
SUBSTANCE: versions are disclosed regarding implementation of designs of a gravity foundation, which comprises the first and second extended foundation sections divided with an open area and made as capable of maintaining weight in water for the specified structure and resting against the bottom of the water area, and an upper section arranged above the specified open area and made as capable of passing at least partially above water surface to maintain the upper structures. Some versions of implementation additionally contain the first and second inclined sections, which connect foundation sections with the specified upper section.
EFFECT: improved design.
20 cl, 8 dwg
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
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.
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
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.
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.
SUBSTANCE: antiicing device for a hydraulic structure located on a shallow continental shelf includes protective elements 2 and fastening elements attaching the protective elements to water area bottom. Protective elements 2 are made in the form of submersible many-sided pontoons with possibility of their being filled with ballast material, one end face is provided with an inclined section and equipped with deflector 3 in its upper part, and the other, at least two end faces are vertical, along which pontoons are attached to each other. Pontoons form closed structure 4 in the form of a polygon in a plan view with two front walls 12 forming an ice-cutting wedge along its central axis, with two side walls 13 and rear wall 14 with possibility of its being disconnected. Each pontoon is installed with its end face with the inclined section and deflector 3 outwards, thus forming closed extended deflector 3 and an inclined surface, which envelop the whole structure along external perimeter. Two front walls 12 are made at least of two pontoons in the form of symmetrical polygons elongated in a longitudinal direction and provided at least with four side faces. Side walls 13 and rear wall 14 are made of pontoons in the form of polygons at least with three side faces. Side wall 13 is tightly attached with its end surfaces to vertical surfaces of front 12 and rear 14 walls. Fastening elements are made in the form of hollow piles and installed throughout the height of pontoons of front 12 and side 13 walls into the corresponding through holes 5.
EFFECT: improving protection efficiency of a hydraulic structure against ice and simplifying the device design.
9 cl, 13 dwg
SUBSTANCE: method consists in filling of a shell with evaporated sea salt, shaping the shell as the construction block. When an air impermeable shell is used, underpressure is developed inside it.
EFFECT: possibility to create elements of structures for construction with usage of cheap and available materials.
2 cl, 2 dwg
SUBSTANCE: invention relates to floating craft, particularly, to pontoons, floating docks and rafts. Floating platform comprises at least two flowing elements interconnected by at least one lock and composed by two sides with at least one vertical ledge at every said side and at least one vertical recess mating said ledge. Top face and bottom make hollow hull. Vertical ledge features narrowed part changing over in widened to make bearing plate. Vertical recess features narrowed part changing over into part widened towards the center to make bearing plate. One of said sides has locking element covering from above said ledge and bearing ledge on opposite side from said ledge. Support flange for locking element on side, on both sides of vertical ledge. Extra external ledge is made on side between vertical ledges.
EFFECT: increased displacement and tonnage at unchanged overall dimensions.
3 cl, 4 dwg
SUBSTANCE: floating platform comprises at least two floating elements jointed together by at least one fastening element. Every floating element consists of at least two side faces with at least one vertical ledge at every said two side faces. Besides, every side face has one vertical recess mating said vertical ledge. Top face and bottom make hollow hull. Also, there is one eye to accommodate fastening element. Every said vertical ledge and every vertical recess are made at the part of appropriate side face to make thrust platform at said ledge and thrust platform at said recess.
EFFECT: higher reliability, expanded operating performances.
3 cl, 4 dwg
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.
FIELD: hydraulic engineering, particularly building bases and foundations, namely bridge piers, in water.
SUBSTANCE: method involves monitoring water obstacle in support building place, including investigating water parameters, recording water level in the course of year, determining floor shape, investigating floor ground, influence of outer disturbing forces and calculating weight and dimensions of support foundation case on the base of above parameters; producing hollow case with several cavities; moving case to installation place; submerging case in water; pacing thereof on floor; fixing case by piles and smoothing floor. Case submerging and placing operations are performed simultaneously with stabilizing vertical case position by performing control and filling of corresponding cavities. Bottom smoothing process is carried out by forcing artificial material, such as concrete layers with crushed stone interlayers, under case bottom. During case placing case is secured by blades built in case bottom and by piles inserted in cavities. Correspondence between case weight, number of blades, head resistance and side friction thereof for particular ground is determined to provide case stability on ground. Upper edge of submerged case is located above maximum possible water wave height. Rock fill is formed around underwater case part.
EFFECT: reduced time of support erection, increased reliability and stability, safety and service life, reduced labor inputs, possibility to erect supports in Arctic basin.
3 cl 1 ex