Self-lifting mobile ice-resistant drilling platform of telescopic type and method of its transportation, assembly and dismantling

FIELD: construction.

SUBSTANCE: invention relates to hydraulic engineering construction of structures and may be used for year-round drilling under conditions of the Arctic shelf. The platform comprises a bottom ballasted plate with an inbuilt support unit and a superstructure. The bottom plate is made in the form of an upper part, a lower part and a sliding sectional support unit of telescopic type. The support unit comprises telescopic sections that are separated at the installation point with a sliding mechanism. Telescopic sections, the sliding mechanism and all required auxiliary devices are installed in sluice compartments. All telescopic sections are of identical height, cylindrical or prismatic shape, and comprise guide slots on the inner and outer surface. Inner and outer cuts of the sections are selected for each other so that arrangement of sections is provided within each other with a gap sufficient for sliding and sealing of sections along the section guides relative to each other, in accordance with the telescope principle. The lower section's cut is larger than the upper one's. Sections of the support unit are arranged in a reinforced ice version. The invention also discloses methods of transportation, assembly and disassembly of a self-lifting mobile ice-resistant drilling platform of telescopic type.

EFFECT: increased reliability of a platform, lower labour intensiveness of methods of its transportation, assembly and dismantling.

13 cl, 3 dwg

 

The invention relates to hydraulic construction, in particular, on the shelf freezing seas for year-round drilling in the Arctic shelf.

Known hydraulic structure (EP 0735197 A1, 02.10.1996, CL EV 17/00)containing underwater part and telescopic supporting column.

The disadvantage of such structures is the inability of its use in harsh environments with weak soils of the bottom in the shallow waters of the Arctic.

The purpose of the invention is to facilitate the transportation, installation works during the construction of structures in harsh environments with poor soil of the seabed in shallow waters of the Arctic.

The technical result of the claimed invention is to improve the manufacturability and reliability, reducing the complexity of the method in connection with the minimization of transport and installation works, which in turn reduces construction costs. As well as enhanced operational capabilities by providing work in ice conditions with weak soils in shallow water.

This is achieved in the claimed self-elevating mobile drilling platform telescoping type so that the bottom plate is made in the form of top, bottom and side sliding sectional reference block of a telescopic type; while supporting block is the C telescoping sections, pushing on the installation point retractable mechanism; telescopic sections, a sliding mechanism and all necessary auxiliary devices deployed in gateway compartments; all telescopic sections are of the same height, cylindrical or prismatic shape, the guide grooves on the inner and outer surface, and inner and outer sections sections are chosen in such a way as to ensure the location of the sections in each other with a gap sufficient for the nomination and sealing along the guides of the sections relative to each other, according to the principle of the telescope, while the lower section has a larger cross-section than the upper; the section of the support block is made harder ice performance.

In addition, this technical result is achieved in that the upper structure is made in the form of units with the necessary drilling equipment.

In addition, this technical result is achieved by the fact that in terms of section section can be made as complex shapes, and simple.

In addition, this technical result is achieved by the fact that the said lower part of the bottom plate provides the attachment to the seabed by piles.

In addition, this technical result is achieved in that the lower part of the bottom plate provides mounting for the sea is but with the help of grooves, which are almost perpendicular to the bottom Ballesteros plate, while the free ends are from the top of the structure.

This technical result is also achieved in two ways transportation self-elevating mobile drilling platform telescopic type using the fact that

in the first embodiment, the bottom plate and the upper structure are transported to the installation site at the same time or separately from each other due to their own buoyancy systems;

in the second embodiment, the bottom plate and the upper structure are transported to the installation site at the same time or separately from each other, with the required sediment is provided by the pontoons.

In terms of installation method self-elevating mobile drilling platform telescopic type technical problem is solved in that the bottom plate with integrated reference block sinks to the bottom step, leaving the top structure above the water surface; the extension of the telescopic sections is carried out by flooding sea water compartments of the sections of the composite bottom Ballesteros plate and retractable mechanism; parallely extension from the upper end to the lower end position of the grooves, and when reaching the bottom of their depth; the final depth of the groove is in is provided by lifting the top of the structure at the desired height above sea level.

Moreover, this technical result is achieved by the fact that the first goes second and third sections relative to the first upper section of smaller cross-section; next is the descent of the third bottom with the largest cross-section of the section relative to the second section.

Moreover, this technical result is achieved in that the depth of the grooves and the rise of the sections is carried out in parallel and one device.

In terms of disassembling self-elevating mobile drilling platform telescopic type technical problem is solved by the fact that due to the sliding mechanism and the pumping of the compartments of the outboard sections of the water being pushed down the upper part of the bottom Ballesteros plate until the water level; going telescopic section, and in parallel with the descent of the sections pulled from the soil piles; while lifting the lower part of the bottom Ballesteros plate collects the section in gateway compartments, while the grooves are moved from the lowest position at the top, and then towed to the next drill site.

While this technical result is achieved in that the telescopic shell going for mounting only in reverse order.

While this technical result is achieved by the fact that towed the next drill site according to Varian is the transport.

The proposed solution is illustrated by drawings, where:

figure 1 shows SMVP telescopic type in the working position;

figure 2 shows the transport position bottom Ballesteros plate with integrated support unit together with the upper structure;

figure 3 shows the transport arrangement SMVP telescopic type when used at small depths.

1 - self-elevating mobile ice-resistant drilling platform (SMVP) telescopic type;

2 - composite bottom balastiera stove with built-jacket;

3 - the lower part of the bottom Ballesteros plate;

4 - the upper part of the bottom Ballesteros plate;

5 is a sectional retractable support unit telescopic type;

6 - telescopic section of the reference block;

7 - slide mechanism of the sections of the reference block;

8 - gateways to accommodate pull-out sections;

9 - dowels for fastening the lower part of the bottom Ballesteros plate;

10 - auxiliary pontoons;

11 - upper structure;

12 - ice box;

13 - marine silt bottom.

Self-elevating mobile ice-resistant drilling platform (SMVP) telescopic type 1 (see Fig.1-2) consists of a composite bottom Ballesteros plate with built-in base unit 2 and the upper structure 11.

Bottom balastiera plate 2, in turn, you olnine in the form of the lower part 3, the upper part 4 and a pull-out sectional reference block of a telescopic type 5. The upper part 4 is for placing the upper structure 11. The upper structure 11 made in the form of units with the necessary drilling equipment. The lower part 3 of the bottom plate provides mounting SMVP on the seabed by means of grooves 9 (see figure 1). The grooves 9 are arranged almost perpendicular to the bottom Ballesteros plate 2 (the deviation from perpendicularity is from 3 to 25), while the free ends during transportation are from the side of the superstructure (upper extreme position, see figure 2 and 3).

Reference unit 5 is composed of telescopic sections 6, pushing at the point of installation of the sliding mechanism 7. Telescopic section 6, the slide mechanism 7 and all necessary auxiliary devices deployed in gateway compartments 8.

Gateway compartments 8 are formed by the cavities of the lower 3 and upper 4 parts of the bottom plate 2, provide full accommodation of the necessary equipment.

All sections of the bearing unit 5 are the same height, cylindrical or prismatic shape, wherein the guide grooves on the inner and outer surface, and inner and outer sections sections are chosen in such a way as to ensure the location of the sections in each other with a gap sufficient for the extraction is to achieve and sealing along the guides of the sections relative to each other, according to the principle of the telescope. The lower section has a larger cross-section than the top. In terms of section section can be made as complex shapes, and simple, such as round, square, rhombic, triangular.

This construction of the support portion of the platform to provide a seamless approach barges, vessels and other craft. For specific conditions, the choice of the form of the sections of the jacket allows for correct orientation in the waters of the partially solve the problem with the ice fields. For example, a face of the reference block in the case of square or triangular cross-section with opposite currents works as an ice-cutter.

The number of sections of the reference block must be chosen according to the required depths of the location field. Section of the support block 6 is made in a rugged, ice design that provides reliable protection of a sliding support block 5 from any ice loads, in particular from the ice fields 12. Increased ice performance can be represented, for example, a combination of steel and concrete sections of the support block 6.

The sliding mechanism 7 is to be chosen according to the weight and size requirements of the platform and climatic conditions.

In magleby period of bottom plate 2 and the upper structure 11 are transported to the installation site at the same time (see Figure 2) and the and separately from each other. Depending on the depths of the two modes of transportation announced SMVP telescopic type.

In the first case, the delivery of the bottom plate 2 and/or the upper structure 11 is made at the expense of their own systems of buoyancy.

In the second case, at small depths drilling required sediment plate 2 and/or the upper structure 11 is provided at the expense of the pontoons 10 (see figure 3).

When private transportation after installation of the bottom support plate 2 installation of the upper structure 11 on the upper part 4 is carried out by any known method, for example the influx.

Installation SMVP point drilling is performed as follows.

Bottom plate with built-in base unit 2 sinks to the bottom 13 is stepped, leaving the top structure above the water surface.

Extension telescopic sections 6 are provided for by the flooding of sea water compartments (Fig. not shown) of sections of the composite bottom Ballesteros plate with built-in base unit 2 and the sliding mechanism 7 as follows. First goes second and third sections relative to the first upper section of smaller cross-section. Next is the descent of the third bottom with the largest cross-section of the section relative to the second.

In parallel with the installation of a telescopic support block SMVP to the bottom 13 produce its attachment to perform this widw the position of the upper end in the lower end position of the grooves 9, and when reaching the bottom of their depth.

The final depth of the grooves 9 is provided by lifting the upper structure 11 at the desired height above sea level.

To save energy the depth of the grooves 9 and the rise of sections 6 is carried out in parallel and a single device, i.e. transforming loss of sections 6 on the rise in the energy of the recessed grooves 9.

After drilling the dismantling SMVP produced as follows. Descend down the upper part of the bottom Ballesteros plate 4 until the water level due to the sliding mechanism 7 and the pumping of the compartments of the outboard sections of water. As for installation only in reverse order going telescopic sections, with the descent of the first section 6 is simultaneously pulled from the ground the grooves 9. Next, when lifting the grooves 9 are moved from the extreme lower position to the upper, the lower part 3 collects in gateway compartments 8 of the section 6 and under option transportation towed the next drill site.

This type of dismantling solves the problem by pulling out of the grooves, which are typical of all constructs used in the conditions of the Arctic shelf. And also eliminates the need for pre-work to thawing and soil erosion in the setup.

Technical and economic advantage of the proposed technical solution is the possibility of year-round drilling in the Arctic conditions of the self-elevating mobile drilling platform telescopic type. The platform can be used for drilling of exploratory wells, and in the ice period for drilling wells.

The proposed self-elevating mobile ice-resistant drilling platform telescopic type and method of transportation, installation and dismantling significantly enhance operational capabilities by expanding the area of operation and maintenance of the shallow shelf from 3 m to 24 m and above.

1. Self-elevating mobile ice-resistant drilling platform telescopic type, comprising a bottom balestibeau plate with integrated reference block and the upper structure, wherein the bottom plate is made in the form of top, bottom and side sliding sectional reference block of a telescopic type; while supporting unit comprises telescoping sections that extend to the installation point retractable mechanism; telescopic sections, a sliding mechanism and all necessary auxiliary devices deployed in gateway compartments; all telescopic sections are of the same height, cylindrical or prismatic shape, the guide grooves on the inner and outer surface, and inner and outer cross-sections of selected sections in such a way as to ensure the location of the sections in each other with a gap sufficient for the nomination and sealing on send the named sections relative to each other, according to the principle of the telescope, while the lower section has a larger cross-section than the upper; the section of the support block is made harder ice performance.

2. Self-elevating mobile ice-resistant drilling platform telescopic type according to claim 1, characterized in that the upper structure is made in the form of units with the necessary drilling equipment.

3. Self-elevating mobile ice-resistant drilling platform telescopic type according to claim 1, characterized in that in terms of section section can be made as complex shapes, and simple.

4. Self-elevating mobile ice-resistant drilling platform telescopic type according to claim 1, characterized in that the lower part of the bottom plate provides the attachment to the seabed by piles.

5. Self-elevating mobile ice-resistant drilling platform telescopic type according to claim 1, characterized in that the lower part of the bottom plate provides the attachment to the seabed by piles, which are almost perpendicular to the bottom Ballesteros plate, while the free ends are from the top of the structure.

6. The method of transportation self-elevating mobile drilling platform telescopic type according to claim 1, characterized in that the bottom plate and the top structure is transported to the installation site one is temporarily or separately from each other due to their own buoyancy systems.

7. The method of transportation self-elevating mobile drilling platform telescopic type according to claim 1, characterized in that the bottom plate and the top structure is transported to the installation site at the same time or separately from each other, with the required sediment is provided by the pontoons.

8. The installation method self-elevating mobile drilling platform telescopic type according to claim 1, characterized in that the bottom plate with integrated reference block sinks to the bottom step, leaving the top structure above the water surface; the extension of the telescopic sections is carried out by flooding sea water compartments of the sections of the composite bottom Ballesteros plate and retractable mechanism; parallely extension from the upper end to the lower end position of the grooves, and when reaching the bottom of their depth; the final depth of the grooves is provided by lifting the top of the structure at the desired height above sea level.

9. The method according to claim 8, characterized in that the first goes second and third sections relative to the first upper section of smaller cross-section; next is the descent of the third bottom with the largest cross-section of the section relative to the second section.

10. The method according to claim 8, characterized in that the depth of the grooves and the rise of the sections is PA is allele and one device.

11. Disassembling self-elevating mobile drilling platform telescopic type according to claim 1, characterized in that the sliding mechanism and the pumping of the compartments of the outboard sections of the water being pushed down the upper part of the bottom Ballesteros plate until the water level; going telescopic section, and in parallel with the descent of the sections pulled from the soil piles; while lifting the lower part of the bottom Ballesteros plate collects the section in gateway compartments, while the grooves are moved from the lowest position at the top, and then towed to the next drill site.

12. The method according to claim 11, characterized in that the telescopic shell going for mounting, only in reverse order.

13. The method according to claim 11, characterized in that towed the next drill site under option transportation.



 

Same patents:

FIELD: construction.

SUBSTANCE: shoe comprises a body and a unit of shoe attachment to a support pillar. It has zero or positive buoyancy and is arranged as capable of changing zero or positive buoyancy to buoyancy of a low negative value. The shoe body comprises a hole for stretching of a support pillar, besides, the specified hole is arranged in the centre of the shoe and comprises vertical guide slots for interaction with racks of the support pillar. The unit of shoe attachment to the support pillar comprises two stops, every of which is equipped with a guide sleeve placed in a body, a sliding block installed in the guide sleeve, and a manual drive to move the block in the guide sleeve.

EFFECT: simplified assembly of a shoe to a pillar.

11 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: proposed system comprises foundation 12, hydroelectric turbine 10 to rest on said foundation 12, and afloat sea ship 14 that allows detachment of said foundation. Ship 1 allows detachment of foundation 12 and its lowering, and/or lifting to position right under the ship, and its attachment to ship. Foundation 12 comprises support 32 to pass upward through ship 14 when foundation 14 is attached to ship from below. Ship 14 has opening 30 for foundation 32 to pass through when foundation 12 is mounted under ship 14 to allow turbine 10 mounted on support 32 to pass there through.

EFFECT: simplified mounting.

13 cl, 7 dwg

FIELD: construction.

SUBSTANCE: superstructure is built on a building slip in a dock on a support deck installed on side walls of the dock. A transport barge that has taken the ballast is introduced into the dock under the superstructure, and the superstructure is installed by means of ballast pumping away from the barge on its deck with its subsequent transportation to a marine oil and gas field. A hydraulic engineering pocket is arranged in place of installation of a support part of a marine oil and gas production facility on the marine oil and gas field. Length, width and depth of the latter make it possible to lead the transport barge to the support part, to install the superstructure onto the support part after taking the ballast by the transport barge, and also to move the transport barge away from the marine oil and gas field after pumping of ballast from it.

EFFECT: invention makes it possible to eliminate using additional crane facilities for transportation and assembly of a superstructure of marine oil and gas production facilities onto a transport barge, and possibility to exclude construction of a marine channel for passage of a transport barge to an oil and gas field in shallow waters.

16 dwg

FIELD: construction.

SUBSTANCE: method to install a platform support block provides for support block transportation, its submersion to the sea bottom and installation onto soil. Ballast reservoirs are used during transportation. Ballast reservoirs are inner cavities of structure elements. During installation the first installation unit is ballasted down. The shaft is put into vertical position. Its eyes are brought to the level above sea surface. Spacers are ballasted to ensure hinged connection of their eyes with eyes of the vertical shaft. The ballast is pumped from the support ring pontoons and/or radial spacers and/or vertical shaft. Spacer ends are put in contact with the support ring due to slight surfacing up of the first installation unit. Spacers are rigidly fixed. Assembly pontoons are ballasted. Its lowering to the prepared bottom section is provided.

EFFECT: simplicity of structure installation, possibility of serial construction, high repairability and possibility of re-equipment in the dock.

6 dwg

FIELD: construction.

SUBSTANCE: ice-resistant support block of a marine engineering facility comprises a cylindrical shaft, a support unit and supporting braces. The shaft is made as hollow. The shaft is hingedly connected to supporting braces. The support unit comprises a support ring. The support ring is formed by at least three rectilinear pontoons. Pontoons are rigidly connected by their ends. The support ring is rigidly fixed to the cylindrical shaft by hollow radial spacers. Supporting braces are rigidly connected to the support ring by lower ends. Pontoons of the support ring, radial spacers, a cylindrical shaft and hollow supporting braces are made as capable of their floatability adjustment from positive to negative one.

EFFECT: invention provides for the possibility of serial construction, reduced labour intensiveness of installing a support block on site and its removal from soil, high repairability and capability of re-equipment in the dock.

8 cl, 6 dwg

FIELD: transport.

SUBSTANCE: invention relates to sea oil extraction platforms. Proposed SPAR platform 200 comprises hull 2202 with central hast 204. Air- and watertight partition 210 runs across central shaft to make variable-buoyancy compartment 220 in central shaft. In compliance with some versions, central shaft bottom is exposed in sea, while in compliance with other versions, central shaft bottom is sealed. At least one pipe 224 to house riser 227 runs through partition and said variable-buoyancy compartment. Said pipe has exposed top face to allows drainage of water accumulated in central shaft to make air- and watertight seal in joint with bulkhead. In some versions, two or more air- and watertight partitions 206, 208, 210 are arranged across central shaft to form one or more air- and watertight ballast tanks 216, 218 arranged fixed between every adjacent pair of bulkheads.

EFFECT: increased platform buoyancy due to its adjustment by central shaft.

16 cl, 4 dwg

FIELD: construction industry.

SUBSTANCE: installation method of bottom complex for performing works on shelf involves assembly of tower erected on the ground and consisting of cone- and taper-shaped sections mounted in series on foundation base with sealing skirt embedded in bottom. Foundation base is installed with hoisting winches and ropes on water-borne vehicle and transported to installation site. Foundation is lowered with coordinated rope movement to bottom. Complex is built up with sections as to height which is more than depth of complex installed on bottom of water area. Vertical position of longitudinal axis of complex is ensured with simultaneous operation of jacks and vibrators arranged on external side along the perimetre of the base. Internal volume of tower is dried. Removal method of bottom complex involves filling of internal tower volume with water. Water-borne vehicle is submerged by means of method of ballast water into tanks. Sag of ropes is chosen with hoisting winches and they are fixed. Ballast water is pumped from tanks. Vibrators and jacks are activated simultaneously till skirt of foundation completely comes out of bottom ground. Complex is transported to new installation place. Complex of equipment includes tower to be installed on ground, and water-borne vehicle. Tower has foundation base with enlarged surface area and sealing skirt, hollow housing with cross section decreasing as to height so that upper section of housing installed on the ground is located above water level. Water-borne vehicle has two hinged housings equipped with tanks, and ballast water receiving and discharge systems.

EFFECT: providing reliable installation of complex on unprepared bottom ground, stability of complex at lateral loads with no anchors available.

10 cl, 3 dwg

FIELD: mining.

SUBSTANCE: system for stabilisation of sea platform mounted of gravitation foundation and anchored at sea bottom consists of multitude of sets of upper blocking elements installed on keel at lower part of platform, of great number of caissons installed at sea bottom, of great number of removable insertions each installed in each of caissons and of set of lower blocking elements in each insertion. Each set of the lower blocking elements is designed to engage with one of sets of the upper blocking elements by means of block system, when the keel is set above caissons. Insertions correspond to a tight attached to the keel cementing material pumped into insertions through the keel. The system stabilises the platform relative to forces of lateral shear and also facilitates easy removal of the platform off the caissons with insertions attached to the keel by applying upper lifting force. Further the platform can be transported and mounted of the second set of caissons arranged at the second site of sea bottom.

EFFECT: group of inventions facilitating mounting of platform ensuring good resistance to lateral shear forces and eliminating difficult and expensive operations for installation of shear skirts.

19 cl, 9 dwg

FIELD: mechanics.

SUBSTANCE: device for anchoring floating structures incorporates mooring bar with ends furnished with the appliance to turn the aforesaid rod about its axis of rotation. At that the rod free end is provided with a sleeve letting the chains or cable to pass there through. The anchor chain passed through one of the aforesaid sleeves is fastened at one end faces of the said floating structure. Besides that, to up the structure stability, the proposed device can be furnished with links connecting the free ends of both mooring rods to the structure in question.

EFFECT: anchoring system causing no floating structure trim difference and providing for stable positioning with minor drift, reduced distance between anchor and floating structure.

11 cl, 15 dwg

The invention relates to the field of drilling offshore, in particular to methods of installation drilling monoatomic reason, stabilize them on the bottom and dismantling

FIELD: transport.

SUBSTANCE: invention relates to ship building, in particular, to modular port for minor ships. Proposed modular port system allows the user to create port of desirable configuration. Said system comprises inlet element, extension and super deck. Inlet element comprises trough with inlet section while elongation element comprise flute extending over its entire length and is exposed at its ends. Super decks are arranged on inlet and/or elongation element at desirable positions to shape flute front ends to accommodate ships.

EFFECT: modular port system.

30 cl, 29 dwg

FIELD: transport.

SUBSTANCE: invention relates to ship building. Proposed ship comprises supports, platform with decks, support fasteners, and powerhelm unit. Supports are made up of sections secured in fasteners in sailing position. Fasteners are arranged at angles of decks. Said decks house platform drives, living and storage compartments, engine compartment, and support shafts. Platform may dive. Platform top deck is provided with mounting seats of various equipment.

EFFECT: expanded operating performances.

12 dwg

Floating island // 2457144

FIELD: transport.

SUBSTANCE: invention relates to design of floating islands intended for habitation of people and animals, for basing air and marine transport including submarines, as well as for deployment of missiles of various purposes including outer-space missiles. Herewith, the invention may also be used in designs of small-dimensioned floating islands intended primarily for growing on them animals, plants and fishes in aquatic aviaries of island, primarily in offshore strip. Floating island contains platform resting on submerged floating base which is made of movably interconnected multiple components enclosed into rigid cage of island. Each base component has watertight protection and being joined with adjacent components forms central agglomeration with which peripheral agglomerations are movably connected which also comprise base. Each component of base is made of reinforced hydrophobic porous heavy concrete and filled with material with less volume density than that of heavy concrete. In each base component which is located at island bottom, at least one spherical vault filled with air or gas is made. Between vault and aquatic medium, there is air cavity communicating with atmosphere via air duct passing through island cage and platform. The island is equipped with bottom stabiliser of island position located under central agglomeration and connected with cage, as well as with lateral stabilisers connected with island cage.

EFFECT: better buoyancy and stability of island, lower labour consumption during its construction.

3 cl, 1 dwg

FIELD: transport.

SUBSTANCE: invention relates to oil-and-gas industry. Proposed platform comprises water separating casing string with buoyancy elements secured on its outer surface over its entire length and arranged between well mouth and platform and coupled therewith. Platform is equipped with ice breaker to prevent its destruction and displacement relative to well mouth. Wedge-like safety belt is arranged along platform outer bottom perimetre, inclination of wedge faces being equal to 5-85. Rods are arranged along platform hull perimetre and provided with 5-500 m-thick layer of resilient material and steel strip. One to four pollution-free windmill electric power stations are mounted on platform deck. In drilling soft rocks, drilling string with cylinders and rock destruction bore bit is arranged directly on said rocks. Sea casing string is fitted inside drilling string without cylinders for well soft roof consolidation. Drilling pipes and water separation temporary and permanent casing strings represent all-cast or all-welded detachable cylinders filled by pressurised nitrogen gas or inert gas made up of cast shell with one welded seam on every side. Openings are made at platform bottom.

EFFECT: higher safety and anti-ice protection.

17 dwg

FIELD: transport.

SUBSTANCE: invention relates to oil-and-gas industry. Proposed platform is provided with ice breaker and wedge-shaped safety belt arranged on platform outer side, at its bottom and all along platform edges. Wedge face inclination angle makes 5-85. Drilling pipe string with cylinders and string with provisional sea well casing pipes with cylinders filled with nitrogen gas or inert gas are lowered on sea bed in drilling soft rocks. Strip top is secured to floating platform. After feeding clay drilling mud, well is drilled in soft rock by drill pipe string using bore bit. Drilling over, said string is lifted onto platform and used fro drilling another well. Permanent sea well case pipe string is mounted and jointed with floating platform. Drilling in hard rock to gas- and oil-bearing beds is performed with smaller-diameter bore bit and drilling pipes with cylinders.

EFFECT: higher safety.

4 dwg

FIELD: transport.

SUBSTANCE: invention relates to ''Spar''-type offshore production platform and method of displacing said platform. In compliance with first version, said platform comprises deck, hull with top part attached to said hull and axial central trunk extending to keel. Bearing buoy of pipelines is arranged in hull keel to be released therefrom. Said pipelines comprise top section secured in place relative to deck to extend through central trunk to bottom section secured in said bearing buoy and to be detached therefrom. Hull and top section of pipelines are selectively detached from buoy and bottom section of pipelines to propel hull and top section of pipelines to avoid collision with floe. In compliance with second version, proposed platform differs from known designs in that hull comprises smaller-diameter neck-like section to joint hull bottom to hull top sections and adjustable ballast mechanism to allow selective propulsion between ballastable bottom position whereat top waterline extends across hull top section and ballastable top position whereat bottom water line extends below bottom section. Method of propelling platform hull consists in connecting hull with sea bottom by multiple mooring lines to allow pipeline bearing buoy to be released from hull keel, lowering pipeline buoy with pipeline bottom section relative to the hull by means of cables, detaching cables from said buoy, detaching mooring lines, propelling hull and pipeline top section from buoy.

EFFECT: deep-water drilling in Arctic waters.

21 cl, 9 dwg

FIELD: transport.

SUBSTANCE: invention relates to offshore oil production platform 1 equipped with turret 1a jointed to its bottom. Note here that platform hull has lengthwise boards extending in (X-X) direction. Proposed platform differs from known designs in that said lengthwise boards (1b) are furnished with multiple devices 10 for local breaking of floating ice, each comprising breaking tool 11 with, at least, one sharpened part 11a to break ice by repeated action in tool translation or rotation relative to lengthwise board. Note here that said sharpened part comes in local contact with floating ice on moving top-down with force equal, preferably, to, at least, 10000 kN. Note also that said breaking tool is driven by guide structure 14 in translation and/or guide structure 13 in rotation. Said structures are mounted on lengthwise board.

EFFECT: perfected design.

FIELD: transport.

SUBSTANCE: proposed system relates to production of hydrocarbons in open sea. Anchor system comprises cylindrical anchor element 1 with its top side intended for contact with installation bottom side, anchor cable ropes for fastening at sea bed, and drives to ensure contact between anchor element 1 and floating installation 2. Said anchor element features density that allows it to be afloat at preset depth below sea level when disconnected from floating installation. Anchor element has well to house propulsor 7 of floating installation 2. Proposed floating installation comprise above described anchor system with drives including fasteners of anchor element to secure it to installation or oil pipelines 5 connected with anchor element 1. Top ends of said pipelines may move between lower position whereat they are disconnected from floating installation and upper position for connection with installation.

EFFECT: fast engagement and release.

11 cl, 5 dwg

FIELD: shipbuilding.

SUBSTANCE: method of construction of floating structures, mostly semi-submersible platform, consists of the superstructure, installed on the supporting columns and pontoons in the dry dock with an area. In the dock pontoons are installed, on which columns are built, and technological overpass between them. On the dock area the topside is constructed and having moved it along the overpass from the column, they connect with them. Initially, the column and overpass are constructed to the level of the dock site. After moving to the top structure to the columns received the dock is filled with water, providing pontoons surfacing with columns and superstructure. After this overpass height is being extended. The dock is to be drained then, providing thus sinking the pontoons, with columns at the bottom. The column constructing is to be finished at the height of the top structure.

EFFECT: reduction of the amount of transport operations.

1 dwg

Fpso platform // 2441129

FIELD: oil-and-gas production.

SUBSTANCE: proposed platform comprises driven drilling outfit, platform deck, lifting crane, auxiliary unit (tender plant), drilling tube, well shaft, well foundation, underwater equipment actuating fluid and gas flow rate devices, manifolds, underwater flowlines, locks, and underwater control system. Drilling tube is equipped with protective envelopment to be locked on platform deck and at well foundation which is made up of chemically stable and water resistant light-protection and load-bearing layers and is provided with hoses furnished with inlet valves arranged along the length of said protective envelopment and connected with mobile elastic reservoirs. Note here that remote-control in-tube pig is arranged in drilling tube top section, in interceptor.

EFFECT: preventing oil spillage in emergent conditions.

2 dwg

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

Up!