Marine ice-resistant adjustable platform mounting system and method for platform transportation and mounting by means of mounting system
FIELD: continental shelf development, particularly artificial islands mounted on piles or like supports.
SUBSTANCE: mounting system comprises two floating crafts, platform transportation pontoon arranged in-between, platform-bearing pile foundation, platform handling piles having parts movable in vertical direction and fixing stops. Platform transportation pontoon includes tow boat arranged in pontoon area so that tow boat immersion provides system usage in low water. Platform mounting method involves installing platform handling piles provided with movable parts sliding in vertical direction and fixing stops at base; moving pile transportation pontoon with platform installed thereon in space between platform handling piles and installing the pontoon between the platform handling piles; fastening moving parts of platform handling piles to platform bottom; discharging ballast from pile transportation pontoon to lift the platform over water surface and connecting movable parts of platform handling piles to platform handling piles by means of fixing stops; filling pile transportation pontoon with ballast to immerse thereof in water; removing ballast from pile transportation pontoon to lift the platform through height necessary for following platform loading on floating crafts; retracting pile transportation pontoon from platform; moving floating crafts to platform; transferring platform from platform handling piles to floating crafts; securing platform to floating crafts and moving platform to well drilling site; transferring platform to previously arranged pile foundation.
EFFECT: increased manufacturability and reliability, decreased labor inputs and extended operational capabilities due to provision of system operation in ice and in low water.
4 cl, 9 dwg
The invention relates to the field of hydraulic structures, and more particularly to means for the development of the continental shelf.
Known complex for installation of marine climbing platform and method of transportation and installation through complex for mounting marine climbing platform (see RF patent №2139973, IPC7EV 17/00, 1999).
The disadvantage of these known and the method of transportation and installation is the complexity of the complex due to the presence of special lifts and limited nautical characteristics of the floating dock, the operation of the above equipment requires highly skilled in service and has a low efficiency due to downtime of expensive equipment when you can't continuously.
Known also complex for installation of marine climbing platform with enclosure containing two floating means, located between the pontoon-Transporter mentioned platform and support base, predominantly pile (see application great Britain No. 2174743 IPC7EV 17/00, 1985. prototype complex and method).
The disadvantage of these known and the method of transportation and installation of the prototype is its complexity due to the presence of expensive crane equipment and not what bademosi display module platform with their help, as well as the impossibility of their use in shallow water.
The technical result of the claimed complex and method is to increase the manufacturability and reliability, reducing the complexity of the method, as well as enhanced operational capabilities by providing work in ice conditions and in shallow water. This greatly reduces the cost of the complex through the use of the existing operation of floating funds with efficiency up to 100%. This gives you the opportunity to immediately start drilling after disconnecting the transport ships, ice conditions does not preclude the operation, as it provides reliable confrontation ice loads at depths ranging from 1.0 m to 4.0 m
This is achieved in the inventive complex for mounting marine ice climbing platform with enclosure containing two floating means, located between the pontoon-Transporter mentioned platform and pile anchor Foundation, the fact that the complex is equipped with handling piles having movable in the vertical direction part and clamps-stops and the pontoon-Transporter is equipped with a tug and a place to host mentioned tug to reduce precipitation of the tug to the value required in shallow water.
In addition, this technical result to thetsa the these craft are marine railway ferries.
This technical result is also achieved in the way of transportation and installation through complex for the installation of offshore ice-resistant adjustable platform design, including the use of two vessels, have between them the pontoon transport and pile substructure, the fact that pre-set on the basis of handling piles having movable in the vertical direction of the part, and tabs-stops, after which the pontoon-Transporter installed on the mentioned platform is slid into the space between handling piles and feature between the latter, then the moving parts handling piles attached to the bottom platform. By pumping ballast pontoon Transporter raise the platform above the surface of the water and fix the moving parts handling piles on handling the piles by means of clamps-stops, then immersed pontoon Transporter by receiving ballast, and then by pumping ballast pontoon Transporter raise the platform on the need for further transplantation on said floating means the height, after which the pontoon-Transporter away from the platform, and the craft down to plan the form and by receiving and pumping ballast produce transplantation with handling piles on said craft, then the platform is fixed on said floating means and produce a transportation platform to the point of drilling, and then transplanted the last pre-installed pile anchor Foundation.
This technical result is also achieved by the fact that to install the platform in shallow water pontoon Transporter down under the said platform and positioned between the said floating means.
Figure 1 shows a cross-section of the platform at the time of installation on the pontoon-Transporter;
figure 2 - transport platform with pontoon-Transporter;
figure 3 - installing platform for handling piles;
figure 4 - design of latch-lock;
figure 5 and 6 - installation steps platform for handling piles;
figure 7 - loading platform on vessels (ferries);
on Fig - transportation platform to the point of drilling;
figure 9 - the platform at the time of installation of pile anchor Foundation in shallow water.
The inventive system for the transportation and installation of offshore ice-resistant adjustable platform 1, is made in the form of the block-module with necessary for the operation of equipment, contains two craft 2 with ballast tanks and systems (not shown) and the pontoon-Transporter 3 to install the platform 1 is the point of drilling in shallow water.
As floating means 2 for conveying platform 1 is used operated at the local marine railway marine ferries.
Pontoon-Transporter 3 is a pontoon with ballast tanks and system (not shown), the body of which is of simplified lines (not shown) with a thickness of 8-10 mm and a device for mooring (not shown).
The complex has a pile supporting base 4, pre-installed at the point of drilling, and is further provided with fixed handling piles 5 in the form of a pipe having movable in the vertical direction of the part 6 in the form of a pipe of smaller diameter than the pile 5, and located in the last.
Between handling piles 5 and the movable parts 6 installed tabs-lugs 7, which may be in the form of, for example, is widely known clamps-stops used for fixing the supporting pillars of self-elevating floating drilling rigs. In the present description illustrates a simplified variant of the latch-lock 7 (figure 4).
Pontoon-Transporter 3 is equipped with a seat 8 for the accommodation of the tug 9 to move during installation on the point of drilling and transportation. Pontoon-Transporter 3 and 2 ferries are equipped with the reference cells 10.
For temporary connection between a floating means 2 and pontoon Transporter 3 is nedosmotreli mooring device (not shown).
The inventive method of transportation and installation through complex for installation of marine ice climbing platform 1 is as follows.
After fabrication of the platform 1 and the corresponding platform 1 in size and displacement of the pontoon-Transporter 3 last flood by taking ballast in the ballast tanks (not shown). Platform 1 is installed on the pontoon-Transporter 3 simultaneously with the pusher 9 and the complex is transported to the base, on which a pre-set handling piles 5, having a movable part 6. Handling piles 5 is also equipped with latches-stops 7. Then the pontoon-Transporter 3 with a pre-installed platform 1 is slid into the space between handling piles have between 5 and last. Then, the movable parts 6 5 piles fixed to the underside of platform 1 and by pumping ballast pontoon Transporter 4 raise the platform 1 on the surface of the water and fix the movable portion 6 in the pile 5 by means of securing-lugs 7. Then immerse the pontoon-Transporter 3 by receiving ballast, install (or build) the reference cells 10, and then by pumping ballast pontoon-Transporter 3 raise the platform 1 on the need for further transfer to ferries 2 height (in one or several who are stages). Then the pontoon-Transporter 3 away from platforms 1 and 2 ferries down to her and by receiving and pumping ballast ferries 2 produce transplant platform 1 with the movable parts 6 handling piles 5 on 2 ferries. After that, the platform 1 is fixed on the ferry 2, for example, by welding. Ferries 2 attached to them by the platform 1 is a single strength complex - "catamaran", which provides safe transportation to the settlement excitement.
Use the "catamaran" transport platform 1 at the point of drilling on certain waters for a relatively short period of time, where it is transplanted on the pre-installed pile supporting base 4.
In case you need to install the platform 1 at the point of drilling in shallow water depth of 1.0 - 3.0 m used pontoon-Transporter 3, which reduces the draught of 2 ferries to 1.0 m (when the displacement ferries, close to the empty state). For this pontoon Transporter 3 stars located in the "catamaran" referred to the platform 1 and is placed in between the 2 ferries. This pontoon Transporter 3 can be connected with ferries 2 using the known cables and mooring devices (not shown). Pontoon-Transporter 3 can be additionally used as cargo space, temporary mo is t, the quay wall.
The claimed invention provides year-round operation adjustable drilling platforms at depths ranging from 1.0 to 4.0 m and significant savings by eliminating the need to build special ships for transportation through the use of existing in the exploitation of marine rail ferries.
The complex allows to operate year-round platform in the sea, for example, the Caspian, Black and Azov seas.
Adjustable platform set on the point of drilling fully operational, allowing, in theory, immediately starting to work in a shorter time than when installing a Jack-up and semi-submersible platforms.
The present invention replaces the expensive operation, Jack-up and semi-submersible platforms and allows you to master shallow shelf to a minimum depth of 1.0 m
The present invention replaces the expensive operation, Jack-up and semi-submersible platforms and allows you to master shallow shelf to a minimum depth of 1.0 m
1. Complex for installation of marine ice climbing platform with enclosure containing two floating means, located between the pontoon-Transporter mentioned platform and pile the support base, characterized in that the complex is equipped with handling piles having movable in the vertical direction part and clamps-stops and the pontoon-Transporter is equipped with a tug and a place to host mentioned tug to reduce precipitation of the tug to the value required in shallow water.
2. The complex according to claim 1, characterized in that the said floating means are marine railway ferries.
3. The method of transportation and installation through complex for the installation of offshore ice-resistant adjustable platform design, including the use of two vessels, have between them the pontoon transport and pile substructure, wherein the pre-set on the basis of handling piles having movable in the vertical direction part and clamps-stops, after which the pontoon-Transporter installed on the mentioned platform is slid into the space between handling piles and feature between the latter, then the moving parts handling piles attached to the underside of the platform by pumping ballast pontoon Transporter raise the platform above the surface of the water and fix the movable part of handling piles on handling the piles by means of clamps-stops, then immersed pontoon Tr is sportiest by receiving ballast, and then by pumping ballast pontoon Transporter raise the platform on the need for further transplantation on said floating means the height, after which the pontoon-Transporter away from the platform, and the craft down to the platform and by receiving and pumping ballast produce transplantation with handling piles on said floating means, then the platform is fixed on said floating means and produce a transportation platform to the point of drilling, and then transplanted the last pre-installed pile anchor Foundation.
4. The method according to claim 3, characterized in that the installation of the platform in shallow water pontoon Transporter down under the said platform and positioned between the said floating means.
FIELD: hydraulic structures, particularly artificial islands mounted on piles or like supports, for example, platforms on raisable legs.
SUBSTANCE: offshore platform has support-elevating device including frame with vertical posts and main horizontal beams, as well as columns with main racks and connection members. Improvement method involves cutting lower parts of vertical frame posts by forming horizontal cuts, wherein cut-off lower part includes lower main horizontal beams; cutting frame into sections so that each section comprises two halves of posts, wherein the sections are connected with each other by main horizontal beams by cutting remainder post parts in center thereof by creating horizontal cuts; moving apart the obtained sections along with racks in centrifugal direction and forming new vertical frame posts by adding vertical beams to each section from outer side thereof and by connecting bases to lower section sides; fastening the bases to said new vertical frame posts, wherein each base has cross-section corresponding to that of said new vertical post; connecting the sections through additional horizontal beams installed at main horizontal beam level; forming columns by rigidly connecting additional racks to main ones and substituting rack connection members for new ones made as horizontal and inclined struts.
EFFECT: extended field of drilling platform utilization due to possibility of platform usage at large depths and decreased labor inputs for platform improvement.
2 cl, 9 dwg
FIELD: construction, particularly artificial islands mounted on piles or like supports, for example, platforms on raisable legs to be erected in wide ambient condition and surface ground characteristic range, in flood plains, water-logged ground, in permafrost zones, sandy ground characterized by varying relief and marine platforms to be erected at any depth.
SUBSTANCE: method for processing platform erection in surface ground involves installing support slab having central depression; forming wells provided with head connectors in the depression; installing load-bearing processing equipment structure on the support slab. The support slab includes rigidly connected central and peripheral parts fastened to ground by means of central and peripheral cemented piles provided with main tensioning connections. Load-bearing processing equipment structure is made as integral truss or truss composed of several modules and is connected to support slab by means of additional tensioning connections.
EFFECT: extended field of processing platform usage.
4 cl, 4 dwg
FIELD: liquid and gaseous underwater deposit development, production complex erection in wide range of ambient conditions and sea bed ground characteristics.
SUBSTANCE: method involves installing production complex module in vertical guiders with the use of hoisting device of main vehicle; lowering the module to predetermined level necessary for module joining with previously installed one with the use of hydraulic drive including rack gearing having rack connected to each production complex module; performing serial module joining for sea bottom reaching and up to predetermined support structure height with respect to sea level.
EFFECT: increased range of complex installation depths, possibility of production complex module standardization along with increased simplicity of module erection technology.
6 cl, 5 dwg
FIELD: hydraulic structures, particularly artificial islands mounted on piles or like supports, for instance, platforms on raisable legs, preferably adapted for oil production in shallow continental shelf, and installed directly on ground or to be fastened thereto by anchor connections.
SUBSTANCE: offshore platform comprises upper structure connected to support base by means of support columns and ice-protective fence installed on the support columns. The ice-protective fence is made as endless inclined assembly extending along platform perimeter in area of ice contact with the platform. The ice-protective fence encloses outer support column perimeters. Inclined assembly has additional ice-protective belt connected to upper part thereof and extending in direction opposite to inclined assembly inclination. The additional ice-protective belt is inclined at an angle of not less than 8° to vertical plane. The ratio between additional ice-protective belt height and inclined assembly height is not less than 0.08.
EFFECT: increased reliability and safety of offshore platform operation in ice conditions.
FIELD: hydraulic structures, particularly marine platforms to be operated in ice circumstances.
SUBSTANCE: ice-resistant platform comprises support base, column and upper building, as well as ice barrier installed on the platform in area of ice action upon the platform. The barrier comprises enclosing wall with stiffening ribs and heat-exchanging device adapted to circulate heat-carrier. The heat-exchanging device is made as a number of channels arranged between stiffening ribs and defined by at least two sealed cavities. One cavity is adapted to circulate heat-carrier, another one is used as air insulation means. Heat-carrier circulation cavity adjoins inner wall of ice barrier. Air insulation cavity is defined by adjacent partition located between both cavities and lid supported by flanges of stiffening rib formed in ice barrier. Heat-carrier circulation cavity is provided with heat-dissipation members installed in flow direction and fixed to barrier wall.
EFFECT: increased reliability and safety of platform operation in ice circumstances due to increased heat to be transmitted to barrier wall cooperating with ice and as a result increased wall temperature and ice melting rate.
2 cl, 7 dwg
FIELD: development of underwater liquid and gas deposits and construction of processing complexes in arctic conditions.
SUBSTANCE: method involves connecting underwater fixed modules to solid ground; fastening upper movable modules comprising processing equipment and/or compressor plants to main supply pipeline with the use of additional supply pipelines. Additional supply pipelines are connected to main one through corresponding switches and to processing equipment or to compressor plant of corresponding upper movable module through coupling clutches provided with bypass valves.
EFFECT: increased reliability and economical efficiency.
4 cl, 4 dwg
FIELD: oil and gas industry, particularly to erect ice-resistant fixed platforms in freezing sea shelf.
SUBSTANCE: marine fixed platform comprises fixed ice-resistant caisson, which consists of separate blocks, and technological liquid and well product storage reservoirs arranged in the blocks. The reservoir bottoms and tops are defined by bottom and upper support caisson plates correspondingly. Reservoir sides are defined by caisson side walls and partitions filled with concrete. Bottom and upper support plates, side walls and partitions are formed of uniform cellular members connected with each other. Each cellular member comprises two parallel metal panels fixedly connected with each other by bridge. The bridge is made as hollow tetrahedral prism having side edges made of metal sheets with orifices.
EFFECT: reduced metal consumption of load-bearing caisson structures and decreased platform erection time.
FIELD: outfit of underwater mineral deposits, mainly liquid and gaseous under various conditions of sea bottom ground.
SUBSTANCE: arrangement of arctic technological complex includes erection of central and peripheral offshore platforms and coastal technological base which are interconnected by main-type piping system. Base of each offshore platform is made in form of stationary module which is mounted on bottom bearing plate and is rigidly connected with ground by means of tension anchor connections. Height of stationary module of offshore platform provides passage of ice cover or icebergs with no contact. Use is made of at least one detachable module which may be coupled in turn with stationary modules; it is made in form of semi-submersible platform provided with ballast reservoirs and technological equipment used for drilling, erection, adjustment, alignment and repair of technological wells; at least one detachable module is provided with compressor station for building-up required pressure in mains.
EFFECT: enhanced reliability and economical efficiency under arctic conditions.
4 cl, 2 dwg
FIELD: mineral exploration and production in continental shelf of freezing sea, particularly to protect drilling platforms against ice action.
SUBSTANCE: protective device is made as band structure installed on water pool bottom and anchored to the pool bottom. The protective device is spaced a distance from marine engineering structure wall and pier thereof to prevent contact between protective device and marine engineering structure pier. The distance is not less than that determined from predetermined correlation. Liquid present in space defined between engineering structure pier and protective device wall may be heated by communicating above space with heat source or by installing heater in the space. Liquid may be also removed from the space and lower and upper protective device parts may be isolated from ambient space by means of flexible enclosure. Above space may be filled with liquid having low freezing temperature.
EFFECT: increased efficiency of marine engineering structure protection against external ice action by reliable engineering structure isolation from ice.
4 cl, 1 dwg
FIELD: hydraulic building, particularly to develop shallow water areas in artificial water bodies.
SUBSTANCE: artificial island comprises earth core bounded with protective belt along earth core perimeter. The protective belt is made as polygon defined by triangular projections adjoining earth core and uniformly distributed along core perimeter. The projections are filled with sand or crushed stone or gravel and have stiffening ribs mounted on projection sides. Space defined by two triangular projections form lagoons uniformly distributed along island perimeter. Ends and sides of each triangular projection are inclined to water surface. Earth core and protective belt heights are at least 2 meters greater than maximal water level in island location area. Earth core may be round or rectangular. The earth core may include sand, crushed stone, gravel or of emersed peat bed composed of segments having, for instance, triangular shapes and retained by conical holes filled with ground forming material. Stiffening ribs of triangular projections are preferably formed of railway rails fixed with reinforced concrete crossties closely laid on projection sides.
EFFECT: increased reliability of artificial island protection against weather effects and reduced artificial island building costs due to simplified island structure and due to possibility to use in-situ materials.
6 cl, 4 dwg
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
FIELD: stationary sea oil platforms.
SUBSTANCE: block has underwater support, made in form of two-level bench, formed by vertical beam cases and horizontal links, and also has support columns, connected to support. Horizontal links of bench are made in form of floating tanks, while links, placed along perimeter of lower level of bench, are separated by water-impenetrable walls on sections, provided with ballasting means. Method for mounting support block at the bottom of continental shelf includes transporting, ballasting of floating tanks and fixing support block at the bottom of water body. Support block is transported into wells drilling zone in planned position, sections of floating tanks are ballasted until lower level of support lowers into bottom of water body for 0.3-0.7 of its height, different and slants are evened and holding beams are inserted into cases of support with their following forcing into hard bottom portion and fixing in cases. Ballasting of sections of floating tanks and forcing of holding beams can be performed in pairs in diagonal planes relatively to center of lower level of support.
EFFECT: simplified assemblage, higher reliability.
2 cl, 12 dwg
FIELD: hydraulic engineering, particularly for forming temporary structures for enclosing closed in plane water area bottom part and space above the bottom part through the full water thickness.
SUBSTANCE: method of shallow tunnel construction involves forming structure enclosing closed in plane bottom part; removing water from the structure; performing works in dry structure and demounting above structure. Method of enclosing structure forming involves producing bottomless hydraulic enclosure with controlled floatability; transporting and moving thereof to tunnel path; immersing the enclosure in water up to reaching water area bottom by reducing floatability thereof and fixing enclosure with fastening means and anchor system; leveling upper enclosure part with horizon line and arranging cranage and platforms for building material storage on upper enclosure part; erecting cutoff walls inside space defined by enclosure; removing water from the enclosure; developing bottom ground by trench digging; constructing pile tunnel base; building foundation grill on pile tunnel base; locating composite or precast reinforced concrete tunnel sections on foundation grill; recovering initial floatability of the enclosure. Enclosure structure has movable fastening means formed as blades along vertical walls thereof.
EFFECT: increased tunnel reliability, reduced time of erection thereof.
4 cl, 4 dwg
FIELD: production of ice.
SUBSTANCE: method comprises producing a hollow near the ship's side, delivering air under the ice cover, the air volume does not exceeding the volume of the space defined by ice covering from the top, water from the bottom, and ice walls from the sides over the contour of the future hollow. The walls are frozen from top to bottom by means of direct nonseparable heat exchangers mounted in advance into the covering immediately behind the contour up to the bottom of the future hollow. The delivery stops and the bottom of the future hollow is frozen with the use of L-shaped nonseparable heat exchangers set into the covering simultaneously with the direct heat exchangers. As a result, a closed space is defined, which is stripped, and ice blocks are removed.
EFFECT: enhanced efficiency.
FIELD: hydraulic engineering, particularly underwater structures adapted for oil and gas well operation, preferably on shallow continental shelf having bottom covered with thick silt layer and in ice-covered period.
SUBSTANCE: platform comprises base, vertical pile holders connected with the base and positioning unit for drilling string and well-control equipment fixation. Base is formed as a structure with cavities filled with ballast. The structure is composed of hollow members and functionally divided into two areas. Positioning unit is arranged in the first area, another area including catching opening. Platform is additionally provided with removable mounting frame with production equipment installed on the frame. Arranged in lower frame part are inclined guiding means to provide access into catching opening during mounting frame connection with support platform base in underwater position.
EFFECT: reduced labor inputs for production equipment mounting and maintenance, increased reliability.
FIELD: offshore oil-field hydraulic structures, namely for building fixed platforms.
SUBSTANCE: support substructure comprises three-dimensional latticed structure having prismatic shape and composed of tubular members. The structure has vertical panels with posts, cross-pieces, struts and horizontal diaphragms connected one to another. Horizontal diaphragms have guiding nets for marine risers. The structure is secured to ground by main piles arranged in vertical posts and by foundation having additional piles, which is rigidly connected to tubular members of side edges of above structure. The structure is provided with ice-protection means formed as two truncated prisms of sheet steel and having beveled side ribs rigidly connected one to another by major bases. Marine risers are arranged inside prisms. Each prism of ice-protection means is rigidly connected with tubular members of corresponding diaphragms of three-dimensional latticed structure.
EFFECT: increased resistance to wave, seismic and ice loads, improved manufacturability and, as a result, reduced cost of permanent offshore structure building.
3 cl, 2 dwg
FIELD: offshore oil-field hydraulic structures, namely for building fixed platforms.
SUBSTANCE: method for forming support substructure by welding large blocks involves producing and serially connecting precast members to create flat units, namely panels and diaphragms; connecting flat units by tubular inserts and tubular links to create three-dimensional latticed structure. All operations are divided into four stages in accordance with technological order. The first stage includes forming tubular links and tubular inserts, pile sections and marine riser sections. The second stage includes assemblage of flat panels and diaphragms in horizontal position on corresponding mats. The third and the forth stages include simultaneous installation of flat panels and diaphragms and rigid connection thereof.
EFFECT: reduced labor inputs, time and cost for assembly work performing due to elimination of complicated tubular joints used as assembly units.
3 cl, 7 dwg
FIELD: ground hydraulic structure erection, particularly to decontaminate silt or bottom sediments in water bodies.
SUBSTANCE: method involves building protective dam along perimeter of silt and/or bottom sediment area to be protected; laying waterproofing layer along inner dam perimeter, wherein waterproofing layer height is 2 times as much as silt and/or bottom sediment layer; forming artificial ground massif of watertight ecologically friendly natural ground in water area inside the dam, wherein artificial ground massif thickness is equal to at least three thicknesses of silt and/or bottom sediment layer; forming above-water relief area having 2.5 m height over water surface; forming surface flow discharge system and planting greenery in artificial ground massif.
EFFECT: increased reliability, reduced contamination concentration, prevention of hazardous substances ingress in ambient space and improved ecological safety.
2 cl, 1 dwg
FIELD: marine hydraulic structures, particularly fixed marine oil and gas production platforms.
SUBSTANCE: method for pile installation with the use of handling machine involves driving each pile in conical hole made in guiding means fixedly secured to marine platform base; installing pile and guiding means in coaxial position by guiding device having body installed on guiding members of the base so that the body may be displaced and fixed in predetermined position; lowering pile to working position; installing guiding device above water level on guiding members of platform base in predetermined position, wherein the guiding device is made as cylindrical body part and cylindrical part of guiding member secured one to another and having crossing axes so that cylindrical part of guiding means and cylindrical part of guiding member of guiding device are brought into coaxial state by corresponding linear and angular guiding member displacement; securing guiding device body with guiding members of platform base.
EFFECT: extended technological capabilities and simplified method of pile installation in working position.
5 cl, 4 dwg
FIELD: marine oil production hydraulic structure building, particularly marine platform assemblage.
SUBSTANCE: method involves forming assembly units, namely support unit, load-bearing deck and block units of upper structure, at subassembly site; docking floating vehicle to subassembly site; serially installing assembling units on stockpile carts; moving assembly units from subassembly site to floating vehicle with the use of above stockpile carts; transporting thereof to assemblage site and performing successive mounting thereof with the use of crane-and-mounting ships. The successive mounting operation involves installing support unit on previously prepared ground; installing piles in corresponding bell-shaped guiders of the support unit; driving the piles and cementing thereof to create pile foundation; arranging load-bearing deck on struts and installation guiding bars having different heights and previously formed on support unit, wherein the load-bearing deck has seats for struts and bars receiving and connection thereof is carried out by successive alignment of above bars and seats.
EFFECT: increased efficiency of building equipment and floating vehicle usage; reduced building time, decreased number of operations to be performed at sea, reduced labor inputs and decreased costs of marine fixed platform building.
7 cl, 17 dwg