Marine gravity platform with embedded foundation
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
The invention relates to the field of hydraulic engineering construction and can be used for the establishment and operation of offshore gravity platforms for the development of hydrocarbon resources on the continental shelf.
Known platform of the gravitational type, comprising a housing, which serves as a support for the placement of surface maintenance of technological equipment (U.S. patent No. 3824795). The bottom shell platform - Foundation in the form of a flat plate rests directly on the bottom of the reservoir or artificial base (bed) and supports the design of the top surface of the platform structure, where operational technological equipment for the preparation of hydrocarbon transportation.
A disadvantage of the gravity platform with a Foundation in the form of a flat plate is the low resistance to horizontal shear loads, in particular ice, high local contact stresses at the base of a flat plate. In addition to this required careful planning of natural or artificial base to ensure the necessary contact between the Foundation and the ground.
Known gravity platform, comprising a housing, a base portion with a bottom plate equipped with ribs, which deepened in the soil of the seabed. The space between PL�and the sea bottom is filled with cement mortar (patent France No. 2335133). This platform has several advantages, in particular, higher stability and uniform contact stresses. Moreover, the design of the Foundation allows you to refuse the execution of a preliminary grading the bottom of the reservoir or the construction of artificial bases (bed).
However, the drawback of this platform, equipped with ribs, is the need for a major effort to zadavlivaniya their ground base, which leads to limitation of depth zadavlivaniya and not reaching edges durable layers of soil and, consequently, reduction of the bearing capacity of Foundation, or to increase the size of the ballast tanks. In practice and calculations, the water depth in waters less than 15-20 meters crushing the ribs to a predetermined depth in a sturdy layers of soil is not possible because of the small installation of the platform weight (reference weight of the unit plus the weight of the ballast).
The aim of the invention is to reduce material consumption due to the decrease of the resistance forces nadavlivanii ribs by the dive at a shallower depth (only on the depth of soft ground) generated by the weight of the platform and ballast (set weight), and dip by ramming (dip) advanced openers in durable layers of soil.
This goal is achieved due to the fact that in the known gravitational platfor�IU, comprising a housing, a base portion with a bottom plate equipped with ribs in the bottom of the perimeter of the Foundation openers installed height required to achieve when you install a solid-surface soil, with the distance between the coulters determined from the expression
where B is the distance between the coulters, m;
H is the immersion depth of the Coulter, m;
φ - angle of internal friction of soil, deg;
α - the angle protruding, hail, determined from the equation (see S. N. Levichev, V. G. Fedorovsky, Y. M. Kolesnikov, S. V. Carillo. Calculation of pile Foundation of hydraulic structures. M., Energoatomizdat, 1986, p. 61).
Moreover, the width of the opener appointed in accordance with the formula
where b is the width of the opener, m;
k is an empirical coefficient, k≥1,0.
The value of the empirical coefficient k is set on the basis of the analysis of data (engineering-geological conditions of the site of installation of the platform, loads acting on the platform, the conditions of possibility of erosion of the soil base� platform) to assure maximum bearing capacity of the subgrade (stability platform) for the combined effect of external loads.
In addition, in difficult geological conditions conducted experimental studies to clarify the width of the opener, at which the maximum bearing capacity of Foundation soil (stability platform).
Openers in a horizontal cross-sectional shape is rectangular, and in the vertical plane - a flat, usually rectangular or trapezoidal and triangular in shape with the thickness of the metal that provides the Flexural strength of the opener when immersed in the ground and in the operating position during operation of the platform (usually the thickness of the metal opener is 20-40 mm). In the upper part of the opener is set to reference the headgear.
The technical result provided by the invention are as follows:
- reducing the consumption of materials in the creation of an offshore gravity platform due to the decrease of the resistance forces nadavlivanii;
- increasing the stability and bearing capacity of Foundation soil due to the openers dip in strong soil layers and transfer loads from gravity platform these rugged dirt base layers;
- improving the reliability and reducing the risk of losing us�ascioti gravity platform during operation under the action of combined external impact loads by increasing the stability of the structure;
- reducing the risk of accidents, environmental pollution due to the loss of stability of gravity of the platform and the violation of normal operation of the downhole and process equipment, piping systems.
The problem is solved in that in the technical solution design of offshore gravity platform, comprising a housing, a base portion with a bottom plate equipped with ribs according to the invention in the lower part of the perimeter of the Foundation openers installed height H required to achieve when you install a solid-surface soil, with the distance between the coulters B. In the upper part of the opener sets the abutment pile cap. Width b opener appointed not less than the distance between the openers Openers B. in the horizontal section shape is rectangular, in the vertical plane - a flat, usually rectangular, trapezoidal or triangular shape with the thickness of the metal that provides the Flexural strength of the opener when immersed in the ground and a working position during operation of the platform.
Set of new essential distinctive features with other essential features allows to solve a new problem, namely to reduce the power consumption by reducing the resistance forces of ass�the Libanius, to improve the stability and bearing capacity of the subgrade offshore gravity platform by openers dip in durable layers of soil, which ultimately leads to increased reliability, durability, reduce the risk of accidents.
The invention is illustrated by drawings, where Fig.1 shows the basic components and elements of an offshore gravity platform, ensuring the implementation of the proposed technical solution, afloat in the transport position, Fig.2 - offshore gravity platform, mounted on a natural base with crushed in the subgrade strip flat ribs (when available) in a relatively weak Foundation soil Fig.3 - gravity platform submerged openers in durable subgrade layers by any known method (for example, pile-driving equipment), Fig.4 is a longitudinal sectional view of the platform shipped with the openers in the solid soil of the seabed, Fig.5 - dip openers in the ground, Fig.6 - plan of the Foundation platform from the openers.
Offshore gravity platform with deepened foundations (Fig.1) comprises a support body 1. On the supporting body mounted upper structure 2. In the lower part of the supporting body is equipped with Foundation 3 bottom plate 4, is provided with a gap 5 along the perimeter of the Foundation for �opener apparatus 6. In the lower part of the perimeter Foundation installed openers 6, the top of which is provided with a support caps with 7 pin retainer 8. Openers 6 is installed in the gap between the Foundation 3 and the limiting straps 9, which is fastened to the base 3 through the gusset plate 10, the thickness not less than the thickness of the openers. In the transport position openers 6 are fixed by any known method, for example, by means of a metal retainer that has low strength characteristics in comparison with the Coulter 6. Also shows the subgrade, consisting of a weak layer 11 and a solid ground layer 12.
The angle of the protruding α indicated in Fig.4, and the angle of internal friction φ - Fig.6. In addition, in Fig.3, 4, 6 the designation of the depth of the Coulter H, the height of the ribs h, the distance between the coulters B and its width b.
The invention is implemented as follows.
In stationary plant conditions (e.g., dry dock) carry out the construction of the support body 1, the upper structure 2, a base part 3 with the bottom plate 4, which is mounted to the ribs (without bandpass flat ribs). On the perimeter from the outside install limiting straps 9 through the gusset plate 10 with the formation of the gap 5 by the cross-sectional dimension of the opener 6. The height of the sock are selected on the basis of engineering geological condition�of Ovi site thus, the openers were shipped in durable layers of soil 12 to provide the desired stability of the platform. Weak soil layer 11 must be passed by the opener 6. The height of the ribs (if any) is also prescribed on the basis of engineering-geological conditions so that they were weak soil layer 11 and reached a solid layer of soil 12. Openers have 6 at this distance from each other so that the prism vapora in a solid layer of soil formed by the openers 6 in buckling of structures that were within the soil layer 12. Based on this condition, the distance between the coulters 6 is determined by the expression (1). Openers usually have either a rectangular or trapezoidal and triangular in the lower part, which is immersed in a solid layer of soil 12, which reduces the resistance force immersing (padding) opener 6 in a durable layer of soil 12. Thickness opener 6 is assigned based on the strength calculation of the loads acting on the vomer in the process of immersion and operation of the platform, and it usually is 20-40 mm. Width of the opener 6 shall be appointed in accordance with the expression (3). In complex geological conditions, the width of the vomer and the length of the gap is determined on the basis of experimental studies of the conditions to achieve the maximum bearing capacity of the subgrade (maximum molten�resistance of the structure). Manufactured openers 6 together with the supporting pile cap 7 and the pin retainer 8 are installed in the clearance between the base part and limiting straps 9, which are made of at least two. Openers 6 are installed so that the bottom end of the opener 6 does not protrude from base plate 4, which is achieved by installation of locks of any design, for example, set the key of soft metal, which is cut in driving opener 6.
After performing routine maintenance in dry dock platform is removed from the dock and transported her to the place of installation. Upon arrival at the place of installation to produce a partial palletirovanie of the housing 1 of the platform, whereby the platform is lowered, and then applies a weak soil layer 11 of the seabed ribs. Platform position and conduct further palletirovanie with nadavlivanie of edges in weak soil layer 11 until they reach a solid soil layer 12 and the resistance force zadavlivaniya sharply. At this point, further palletirovanie stop installation and the weight of the platform (the weight of the platform plus the weight of the ballast) reaches its maximum. After checking the verticality of the platform begin work on the openers dip 6 using underwater hammers or vibrators, locking them on the abutment pile cap 7 by means of pins f�of kitarov 8. The driving control openers 6 ground base 12 is carried out using underwater videos are secured and transmitted to the operator on the ship. After reaching opener design position driving this opener 6 is terminated, and proceed to the next dive opener 6. Preferably the driving conduct alternately on diametrically opposite sides of the Foundation 3 of the housing 1. After driving opener 6 if necessary they inject cement into the intercostal space between the plate 4 and the soil layer 11 of the seabed.
In General, the described solution allows you in addition to basic achievable goals to better protect the Foundation from erosion.
Thus, the application of the proposed technical solution allows to expand the range of depths (in the direction of a significant decrease in their values), which can effective use of gravitational structures with embedded foundations.
The analysis of the prior art showed that the claimed set of essential features set forth in the claims is unknown. This allows to make a conclusion about its compliance with the criterion of "novelty."
To verify compliance of the claimed invention, the criterion of "inventive step" conducted an additional search of the known technical�technical solutions with the aim of identifying signs coinciding with the distinctive features of the prototype features of the claimed technical solution. Found that the claimed technical solution is not obvious from the prior art. Therefore, the claimed invention meets the criterion of "inventive step".
Described above is new, industrially applicable technical solution is a single inventive concept, is responsible, in our opinion, the criterion of inventive step, therefore, is offered for the legal protection of a patent.
1. Offshore gravity platform with a deep Foundation, comprising a housing, a base portion with a bottom plate equipped with ribs, bury in the ground, characterized in that, to reduce material consumption while improving the sustainability of the platform, the Foundation in its lower part around the perimeter from the outside is equipped with coulters with depth and distance between them is determined from the expression
B≤2H tanα tanφ,
where B is the distance between the coulters, m;
H is the immersion depth of the Coulter, m;
φ - angle of internal friction of soil, deg;
α - the angle protruding, hail, determined from the equation
the opener is made of a width determined from the expression
where b is the width of the opener, m;
k - e�pricheski coefficient, k≥1,0, determined on the basis of experimental studies.
2. Platform according to claim 1, characterized in that the opener is made of rectangular shape in the zone of immersion in strong soil layers.
3. Platform according to claim 1, characterized in that the opener is made trapezoidal shape in the zone of immersion in strong soil layers.
4. Platform according to claim 1, characterized in that the opener is made of triangular shape in the zone of immersion in durable layers of pound.
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 ship building, particularly, to sea gravity ice-breaking platform to be used in shallow water. Said platform comprises bearing plate composed of hollow body dividing in compartments filled with ballast and top displacement hull with processing and ship equipment built in bearing base deck closed elevation to uncouple them. Inner boundary of said deck elevation is equidistance in plan with floating structure outlines with difference in sizes defined by the relationship: δ=δï+δã, where δis aforesaid difference, δï is maximum sum of construction deviation of sizes ob said body and hull from rated values, δãis guaranteed clearance required for alignment of top structure with platform bearing base outline.
EFFECT: higher operating efficiency in ice.
2 cl, 2 dwg
SUBSTANCE: invention relates to sea gravity platforms for exploration of oil and gas deposits at continental shelf. Proposed platform comprises submersible offshore platform composed by bottom and top bearing plates, sidewalls and internal bulkheads. Bell consisting of separate sections is hinged to submersible platform bottom part. Every said section comprises vertical wall, stiffness ribs and guide pipes. Stiffness ribs have support elements at the points of abutting on bottom plate. Submersible platform sidewalls includes element for attachment of said bell in transport position and recesses to accommodate retainer pints.
EFFECT: higher stability, low draft, fast assembly and disassembly.
SUBSTANCE: platform comprises a support base made in the form of a bottom board with a developed surface, strongly connected with a perpendicularly installed ice-resistant support block, somewhat protruding towards the bottom below the level of the near-bottom plane of the board. At the same time the ice-resistant support block is made in the form of a cylindrical column; special pipes - water-separating columns installed into the ice-resistant support block, through which operating wells are drilled; a superstructure made in the form of three replaceable floating decks with U-shaped cuts in the centre: decks of civil construction purpose, decks of drilling purpose and decks of operational purpose, at the same time U-shaped cuts are made as congruent to the cross section of the ice-resistant support block; detachable lifting mechanisms installed on the outer side along the perimeter of the U-shaped cut of the deck, engagement or disengagement with the support base is provided, as well as movement and fixation of the deck at the safe height of the ice-resistant support block; piles for fixation of the support base drilled with a drilling plant along a curvilinear trajectory provide for safe operation of the structure.
EFFECT: increased reliability of operation and process safety of an area of water during civil construction and drilling works.
3 cl, 3 dwg
SUBSTANCE: proposed appliance comprises fastening assy. Said assy is composed of four lugs interconnected by central load-bearing element and suspension of anchor cables and chains. Said lugs are arranged around said load-bearing element for connection with lugs of floating elements. Floating elements are incorporated with floating platforms. Said suspension interacts with central load-bearing element composed of a spider with central bore or a rectangular frame.
EFFECT: friendly use.
SUBSTANCE: collapsible waterborne vehicle includes set of separate floating modules in the form of parallelepiped which are interconnected by detachable connection units located at corners. The detachable connection units have fixing locking device. Floating modules are unified by methods of their mounting on multimission vehicles and by dimensions in accordance with dimensions of general purpose containers. A waterborne vehicle cam be composed by means of floating modules coupling in longitudinal, lateral and vertical direction both with horizontal and vertical module orientation in space. Bodies of floating modules are made hollow and filled with filler. As floating module body material a metal, reinforced concrete, fibreglass plastic or polyethylene can be used, and as floating module hollow body filler foamed concrete, glass foam, foam plastic or foamflex can be used.
EFFECT: simplified transportation, assembling and dismantling of waterborne vehicle.
2 cl, 4 dwg
FIELD: oil and gas industry.
SUBSTANCE: group of inventions relates to shelf drilling. A drilling ship includes the first drilling centre including a storage for the first marine risers, the second drilling centre for drilling of the second well from the same ship, which includes a storage for the second marine risers. The latter have a diameter that is smaller than that of the first marine risers. The ship includes two blowout preventers for the second drilling centre. A drilling method provides for creation of a drilling ship with two separating and different drilling centres, each of which is capable of well drilling; provision of marine risers for each drilling centre; diameter of marine risers for one of the drilling centres is smaller than that of marine risers for the second drilling centre; provision of two blowout preventers according to the smaller diameter of a marine riser of an auxiliary drilling centre.
EFFECT: providing drilling of a well from one ship from two different drilling centres, and namely under arctic conditions.
19 cl, 5 dwg
FIELD: oil and gas industry.
SUBSTANCE: invention is related to the development of subsea mineral deposits mainly in arctic conditions and it may be used for underwater drilling and completion of wells notwithstanding meteorological and ice conditions at the surface. Underwater drilling facilities consist of an underwater drilling rig, a seafloor template, and an underwater supply vessel. The underwater drilling rig is made as a set of separate modules, for example, a drilling module an accommodation and control module, a power module and modules for expendable materials storage. The power module is connected by cable connections to the drilling module, accommodation and control module, and the modules for expendable materials storage. The accommodation and control module is connected by signal cables with the drilling module, power module, and the modules for expendable materials storage. The modules for expendable materials storage are connected to the drilling module by hoses.
EFFECT: improved operational efficiency of drilling equipment in arctic conditions.
3 cl, 1 dwg
SUBSTANCE: waterborne vehicle consists of multipurpose modules, two separators. Each module includes air-filled float in the form of empty plastic bottle plugged with screw plug. Upper and lower separators are performed as horizontally oriented plates made of waterproof material with holes for floats installation and securing.
EFFECT: higher loading capacity, functionality, structure reliability and convenience in transit.
5 cl, 6 dwg
SUBSTANCE: floating island represents partially submerged volume structure made of floating facilities with positive bouyancy which are interconnected by means of flexible inextensible link and resilient damping link. Floating facilities are neighbouring each other and spaced in horizontal direction, and each one them represents volume hollow structure with side walls, bottom and roof which is base surface located above water for island infrastructure facilities to be installed on it. Each floating facility is made as hollow sealed block having positive bouyancy and shape of regular parallelepiped or regular prism with height less than length of any of base sides. Each wall of each floating facility facing wall of adjacent floating facility is connected with this wall by means of flexible inextensible link and resilient damping link throughout the length of this wall. The resilient damping link is made capable of damping in at least two mutually perpendicular directions.
EFFECT: reliability and durability of island, increased carrying capacity of island.
9 cl, 3 dwg
SUBSTANCE: set of inventions relates to system of fluid product transportation between two vessels in open sea. The transportation system includes two tubular devices (2) which are mutually independent and each one of which contains two segments (2a, 2b) pivotally connected with each other by the first of its ends. The second end of the first of two segments is suspended with possibility of rotation on support arm (1) using unit (12) of three double rotating connections. The second end of the second segment is connected with connecting device (6) installed in the second location. The system contains the first device (13, 15) for rotation of each first segment (2a) relative to support arm in order to lower its first end from storage position to the same side as support arm, and the second device (33, 11) for connecting the second end of each second segment to connecting device (6) from beneath of connecting device by means of pulling the second end of each second segment (2b) up from the second location to connecting device.
EFFECT: better operation conditions for transportation system.
19 cl, 16 dwg
SUBSTANCE: invention relates to ship-building, specifically to enterprises intended for basing, technical inspection and renovation of vessels, as well as for initial operations connected with hydrocarbon production. Base of underwater oil-producing fleet includes administration and on-site facilities, dock, osmotron, railway station, airport with helipad. Dock is made with possibility of technical inspection of underwater vehicles which produce oil under drifting ice and represents transshipment point when oil is delivered by radio-controlled raiders in meshy containers which fill polymeric reservoirs with oil on dry-cargo vessels to deliver containers to oil refineries. Dock roof is equipped with snow-saving canisters from which melt-water can be used to raise water level in separate compartments of dock and to generate electric energy in hydraulic turbine.
EFFECT: base for underwater oil-producing fleet is organized to provide vessel technical inspection, crew rotation, replenishment of completion materials and to serve as transshipment point when oil is delivered by raiders to dry-cargo vessels.
SUBSTANCE: invention relates to floating barges used to install a superstructure for marine platforms, more specifically, to systems and methods of stabilisation of vertical rocking caused by wave impact at the barge system in process of superstructure installation. One or more damping plates may be connected in the position below the water surface with one or more barges for changing the period of barge movement relative to the period of wave motion for better stabilisation of the barge and resistance to vertical rocking. The damping plate may be connected between barges or at the end or side of the barge. Each barge may contain a damping plate, and damping plates may be connected to each other with the possibility of disconnection. Additionally the damping plate may turn in the upward direction in process of superstructure transportation to the place of installation for reduction of hydraulic resistance and then turn into submersible position during installation of the superstructure.
EFFECT: technical result is achieved in increased extent of resistance of a barge system to vertical rocking caused by wave impact when using the system for installation of a superstructure onto marine platforms.
20 cl, 23 dwg
SUBSTANCE: self-moving drilling ship has hull made capable to rotate relative to turret mounted in it with vessel mooring system, deck, accommodations, drilling well under turret, technological drilling facilities and drilling rig with drill string passing through turret and well placed on the main deck, propelling-steering complex, power plant located in the hull. Drilling rig with underrig space, technological drilling facilities, deck walkways and accommodations of vessel are winterized - protected against adverse environmental conditions by safety cages with heating system. Around lower part of drilling well, ring-shaped guard is installed to prevent ice entering. Turret, drilling well and drilling rig with drill string are located in fore part relative to midship section, and accommodations are located in aft part of vessel. The vessel is provided with helicopter deck, system for personnel safe emergency vessel escape in icy conditions, as well as with dynamic positioning system.
EFFECT: improved operational characteristics of drilling ship during prospecting and exploratory drilling on arctic shelf.
FIELD: shipbuilding; manufacture of mobile research complexes.
SUBSTANCE: proposed complex is made in form of ship with small waterplane area having upper and lower hulls interconnected by means of telescopic columns for disconnection and autonomous motion of these hulls. Lower hull is submersible vehicle and upper hull is amphibian. Both hulls are provided with greenhouses and power units for generation of energy for motion of complex, domestic and technological purposes, as well as for growing vegetables, sea products and production of distilling water by motion of spheres with plant containers located spirally on their surfaces, thus ensuring generation of electric power. In addition to vegetation tubes with plants growing chains are provided where sea products are contained for distilling sea water by change in pressure and level of illumination and growing chains for growing fish and preparation of nutrient solution for plants. Lower hull is provided with plankton trawls for delivery of plankton for greenhouse and power plants of lower and upper hulls for growing fish and sea products. Amphibian supplies fresh air to submersible vehicle through its collector; it is also used for transportation of sections for erection of scientific research station. Provision is made for delivery of light to submersible vehicle through lenses, light conduits and structural sections and light conduits of collector of vehicle.
EFFECT: environment control.
4 cl, 22 dwg