Complex for offshore hydrocarbon fields
(57) Abstract:The invention relates to the field of hydraulic structures and is intended for use on the continental shelf. Complex for offshore hydrocarbon deposits includes the United transitional bridge offshore platforms, each of which includes a support block, a carrier deck and superstructure longline type, consisting of modules and mounted on a carrier deck, and the modules contain the drilling, operating, energy and residential complexes, and made no more than two platforms 1 and 2. Transition bridge 3 between platforms 1 and 2 one end of which is rigidly fixed to the deck superstructure 8 platform 2, and the other end is mounted with the possibility of longitudinal movement relative to the carrier deck 6 of the platform 1 when the temperature drops. Bearing deck 6 made with the possibility of accommodation in their internal volume of the tank of fuel and process tanks, the platform 1 is placed functionally complete module 7 of the residential complex and technology 9 energy 10 modules on the platform 2, and the process module 9 includes a drilling rig 20 and 21 operational complex is alcami 23 for the passage and evacuation. The invention allows to reduce the consumption structure by optimizing the design while maintaining the level of safety and comfort. 2 C.p. f-crystals, 5 Il. The invention relates to the field of hydraulic structures and is intended for use on the continental shelf.Known complex for offshore hydrocarbon deposits, representing a fixed offshore platform having a support block shaped structure mounted on the seabed, the carrier deck, mounted in the upper part of the supporting structure and the upper structure mounted on a carrier deck and consists of residential, technological and energy modules (see U.S. patent 4666340, NCI 405-204, 1987).The disadvantages of this known are the over-saturation of the upper structure of different functional purpose equipment, leading to increased support block and, accordingly, to increase the complexity of hydraulic and underwater engineering works, as well as a lack of security due to the placement of the residential module in close proximity to the industrial area.Known also complex for obustroystvo transitional bridge fixed offshore platforms, each of which includes a support block shaped structure mounted on the seabed, the carrier deck, mounted in the upper part of the support block, and the upper structure, consisting of modules and mounted on a carrier deck, and superstructure of one of the platforms is a drilling complex, and on the other platform mounted operational, energy and residential modules (see "Leman'B Caomplex" - The North tea Platform guide. Oilfield Publications Limited (OPL), England, 1983, p.487. Accommodation residential module of this complex in the immediate vicinity of the industrial zone affects the safety and comfort due to the production of noise and the possibility of emergency situations. In addition, after drilling, there is no need to use platform with drilling complex, which reduces the economic efficiency of the system as a whole.Known also complex for offshore hydrocarbon deposits comprising spaced at some distance from each other and connected by a transitional bridge three fixed offshore platforms, each of which includes a support block truss installed on the seabed, the carrier Palu is set on the carrier deck, the upper structure of one of the platforms is made in the form of a living module, and on other platforms are technological modules, representing drilling and production systems, as well as the power module (see complex Ualhall" - "The North Sea Platform guide Oilfild Publication Limited (OPL), Englend, 1983, p.p.685-687, which is the prototype of the present invention).The disadvantage of the prototype is a significant intensity due to the presence of three fixed platforms with support blocks, bearing decks and the top of the buildings, as well as the considerable length of the communications between the platforms and the amount of engineering-geological surveys and hydraulic engineering works for the installation of three supporting blocks on the seabed. In addition, after drilling, there is no need to use platform with drilling complex, which reduces the economic efficiency of the system as a whole.The technical result of the claimed invention is the optimization of the design, reducing the metal, increased economic efficiency while maintaining the level of safety and comfort.This is achieved in the complex for offshore qui is perehodnik bridge fixed offshore platforms, each of which includes a support block truss installed on the seabed, the carrier deck, mounted in the upper part of the support block, and the upper tiered structure type, consisting of modules and mounted on a carrier deck, and the modules of the complex furnishing contain the drilling, operating, energy and residential complexes, and the upper structure of one of the platforms is made in the form of a residential complex, the fact that the complex arrangement is made not more than two platforms, and the transition bridge at one end rigidly fixed to the deck superstructure one platform, and the other end is mounted with the possibility of longitudinal movement relative to the carrier deck of the second platform when the temperature drops, and the load-bearing deck made with the possibility of accommodation in their internal volume of the tank of fuel and process tanks, while on one platform placed functionally complete module housing complex, and process and power modules in the second, and the process module includes drilling and production systems, and technological tiers and energy modules on the perimeter of the platform is supplied with power is that the load-bearing deck made beam type. In addition, this technical result is also achieved by the fact that drilling complex assembled with the possibility of dismantling during operation of the process module after completion of drilling.This is achieved by the fact that the load-bearing deck made with the possibility of accommodation in their internal volume of the supplementary tank of fuel and process tanks.The figure 1 shows a General view of the proposed complex for offshore hydrocarbon fields,
in Fig.2 is a top view of complex equipment,
in Fig.3 - view And Fig.2,
in Fig.4 - a view B of Fig.2,
in Fig.5 is a view In Fig.2.The inventive system for offshore hydrocarbon fields includes spaced at some distance from each other fixed offshore platforms 1 and 2, United transitional bridge 3. Each of the platforms 1 and 2 has a support unit 4 truss installed on the sea bottom 5, and a carrier deck 6, mounted in the upper part of the support block 4.On the carrier deck 6 platform 1 is set to the upper structure 7 in the form of a functionally complete longline module housing complex, and on the carrier deck 6 platform is="ptx2">Transition bridge 3 one end 11 is rigidly fixed to the deck 12 of the power module 10 of the upper structure 8 platform 2 by means of bracket 13, and the other end 14 is mounted with the possibility of longitudinal movement relative to the carrier deck 6 of the platform 1 when the temperature drops in the guides 15 bearing 16 mounted on the carrier deck 6 platform 1.Bearing deck 6 beam type made with the possibility of accommodation in their internal volume 17 independent tanks of fuel 18 and technological tanks 19.Technological module 9 includes a drilling rig 20 and 21 operational complexes.The layers 22 9 technological and energy 10 modules on the perimeter of the platform 2 is provided transitional areas 23 for the passage and evacuation.Drilling complex 20 is mounted with the possibility of dismantling during operation of the process module 9 after completion of drilling.The inventive system for offshore hydrocarbon deposits can be formed on the field as follows.After carrying out the underwater survey work on the seabed 5 in the Deposit area are alternately lowered by means what omashu watercraft (not shown) supporting blocks 4 platforms 1 and 2. Similarly delivered and installed in the upper part of the supporting blocks 4 pre-fabricated load-bearing deck 6. In the interior volume 17 of the bearing 6 decks load, for example, craft (not shown), a tank of fuel 18 and technological tank 19. Fully-formed at the factory-the Builder of the upper structure 7 of the residential complex is transported via boats, such as transport and installation vessel (not shown) to the platform 1 and through guidance and ballasting mentioned boats set top structure 7 on the carrier deck 6 platform 1.Similarly manufactured, transported and installed on the carrier deck 6 of the platform 2 is fully formed technology 9 energy 10 modules of the upper structure 8. If necessary, the upper structure 8 may be formed directly on the field. If this equipment upper structure 8 technology 9 energy 10 modules produced in stages. This is transported by watercraft (not shown) to the installation site separately, for example, the drill 20, 21 operational systems and energy 10 module and install them on the carrier PAL is using watercraft (not shown) is transported transition axle 3 and is connected with it by using platforms 1 and 2 between them, why is rigidly secured by a bracket 13, the end 11 of the bridge 3 to the deck 12 of the power module 10 of the upper structure 8 and the other end 14 of the axle 3 is mounted on the support 16 with the possibility of longitudinal movement relative to the carrier deck 6 upper structure 7 platform 1 when the temperature drops in the guide rails 15, which are mounted on a support 16.Then on the bridge 3 pave communication links (not shown) connecting the platforms 1 and 2.In the residential complex of the upper structure 7 place the staff of the complex. Produce drilling by drilling system 20. After proburivaya and receive the first production wells begin operating field using the operational complex 21.After completion of the drilling operation field drilling facility 20 can be disassembled and reused in other structures and drilling platforms.The inventive system for offshore hydrocarbon fields due to the presence of the distinctive features mentioned in the claims, yavlyaetsya optimal design, less metal, more cost effectivnogo hydrocarbon fields, includes located at some distance from each other and connected by a transitional bridge fixed offshore platforms, each of which includes a support block truss installed on the seabed, the carrier deck, mounted in the upper part of the support block, and the upper tiered structure type, consisting of modules and mounted on a carrier deck, and the modules of the complex furnishing contain the drilling, operating, energy and residential complexes, and the upper structure of one of the platforms is made in the form of a residential complex, wherein the complex arrangement is made not more than two platforms, transition bridge one end rigidly fixed to the deck of the upper structure of one platform and the other end is mounted with the possibility of longitudinal movement relative to the carrier deck of the second platform when the temperature drops, and the load-bearing deck made with the possibility of accommodation in their internal volume of the tank of fuel and process tanks, while on one platform placed functionally complete module housing complex, and process and power modules in the second and technological module is on the perimeter of the platform is equipped with transitional sites for access and evacuation.2. Complex p. 1, characterized in that the load-bearing deck made beam type.3. Complex p. 1, wherein the drilling system is fixed with the possibility of dismantling during operation of the process module after completion of drilling.
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