Device for setting and fixing on the seabed of the arctic platform
(57) Abstract:The invention relates to the field of hydraulic engineering construction, in particular, to devices for setting and fixing the Arctic marine platforms. The inventive within the device containing piles, interacting with cyanomethylene based platform lifting mechanism, the base platform is supplied by a holder under piles and elevating mechanism mounted within the casing and consists of a head plate is u-shaped in plan, driven by hydraulic cylinders double-acting, hinged to the yoke. On the traverse from the top to the installed cargo butt, which zapasovany ropes cargo hoists, peremeshivayte by rail, located along the trajectory of the placement of piles. 2 C.p. f-crystals, 3 ill. The invention relates to the production and retention of an offshore drilling platform and with the greatest effect can be used in Arctic conditions, when it is necessary to resist the advances of the ice fields.To the means of production platforms are different in design support-lifting mechanisms, for example, in the form of Jack (see U.S. patent N 4053138, CL 254 105 from 1977, N 427051 CL 254 10tx2">Using these mechanisms support columns, drilling platforms are installed with nadavlivanie in the ground floor, and if necessary, the relocation of platforms these mechanisms support columns are extracted from the bottom. As you can see, each nadavlivaya support column has its own mechanism, which transmits the necessary force on the column in the process of working with her.As practice shows, the offshore platform with zadowolenie support columns (usually from 3 to 6 pieces) in Arctic conditions is unreliable. They cannot successfully resist moving ice fields.To increase the reliability of fastening of the Arctic marine platform on the seabed, often resort to the use of additional piles. One example of such solution is described in the application France N 2499935, class B 63 B 35/44 from 1982. Here to improve the adhesion with the ground, in particular, the use of piles to be introduced in the bottom. The interaction of the platform with posts (piles) via the hydraulic device, individually mounted to each rack. However, as was shown above, such a design of the platform, even with the implement in the ground racks (piles), not preclude unreasonably (expensive) increases the number of supporting and lifting mechanisms. Grow the dimensions of the premises where it should be posted by these mechanisms.In the application of UK N 1288663, class B 8 J (B 66 F 1/02) from 1972 described the design of support-lifting mechanism (Jack) to move barges decks relative to the racks. The hydraulic Jack is made in the form of a cylinder hinged to the deck, which allows you to have some degree of freedom (rolling in the vertical plane). However, as in the previously described constructions, the anchor-lifting mechanism is applied individually for each rack, with which it has a constant kinematic connection during the installation of platform for its removal from the point of drilling.By the greatest number of matching signs this solution can be adopted for the prototype. The objective of this proposal is part of finding a solution, when one and the same reference-lifting mechanism can serve several racks (piles) alternately.This object is achieved in a device for setting and fixing the Arctic marine platform containing the rack (piles), interacting with removable mounted on the base platform lifting mechanism made in the form of horseshoe cargo eyebolts are installed for hanging to talam, moving on to the monorail sweep placement of piles.The task is achieved by the fact that the rack (piles) is placed in the holder, for example, a ring shape with a honeycomb form and amount of which are adequate to the cross section and the number of racks (piles).This object is achieved in that the yoke is provided with elements temporarily fixing it on the rack (the pile), for example, in the form of zastrevaya devices with its own hydraulic drive.In Fig. 1 shows a General view of the seat base platform of Fig. 2
section a-a of Fig. 1; Fig. 3 node 1 Fig. 1.Device for setting and fixing the Arctic marine platform contains mounted on a submersible base 1 supports 2, 3, inside which is placed in the cell holder 4 pile 5, on the body of the cell holder installed removable lifting mechanism 6. This mechanism is made in the form of a u-shaped beam 6, the driven cylinders 8 double-acting hinge 9, fixed on the cell holder 4. On top of the traverse are cargo butt 10, which superovulate cargo hoist 11 moving on the rail 12. The pins 13 are provided with hydraulic cylinders 14.Offer ustroitsa to the place of registration. This set of piles 5 is a comb clip 4.Upon arrival to the place of setting the Foundation 1 ballustrade and falls to the bottom of the reservoir. In the process of transporting the lifting mechanism 6 of its horseshoe-shaped head plate 7 encompasses one (any) pile 5. As soon as the ground will reach the bottom, begins operation nadavlivanii piles into the ground. In traverse 7 posted by the pins 13 from the hydraulic actuator 14, which are included in the interaction with the corresponding holes in the pile. Such constructive interaction is widely known and therefore not described in detail. So, included hydraulic actuator pins 13, which are mentioned holes in the pile. Includes hydraulic cylinders 8, 9 are pivotally fixed to the holder 4. Is working stroke. This is then intercepted by pins 13 for the next series of holes that is done the next working stroke. And so up until the pile 5 will not be buried up to the design elevation. This is followed by disconnection of the cylinders 8 of the casing 4. Join Tali 11, which in the butt 10 lift mechanism and moving on rail 12, a transfer mechanism 6 to the next pile, which he easily put open u-shaped support beam 7. This design beam p is La its placement inside the supporting column 2. Described operation nadavlivanii piles 5, obviously, is with all the design number of piles 5. On completion of the works in the water area of the base 1 is preparing to move to another area. For this mechanism 6 is alternately removing piles of soil are also stepping interception of beam 7. This is done through the use of hydraulic cylinders 8 double action. Also consistently with details 11 mechanism 6 is transferred from the pile to the pile where near each hinge 9 is temporarily fixed to the holder 4. The holder 4 consists of a metal structure with peripheral equidistant from each other holes cells, in which, as in the conductor are placed piles 5. In these holes (on the walls) posted by simple clamps (not shown because of the wide popularity), through which the piles are kept from falling out during transport platform on the sea. After removing the last piles 5 mechanism 6 remains on it and will be enabled to push the pile already on arrival at the new location.The described device is particularly effective in application for statement of Arctic drilling platform, which is its base 1 and piles 5 are held securely at the point of drilling and successfully resists shear and othenia on the seabed of the Arctic platform, containing piles, interacting with removable mounted on the platform of the lifting mechanism, wherein the base platform is supplied by a holder under piles and elevating mechanism mounted within the casing and consists of a head plate is u-shaped in plan, driven by hydraulic cylinders double acting, hinged to the housing and installed on top of the traverse cargo Obukhov, which zapasovany ropes cargo hoists, moving by rail, located along the trajectory of the placement of piles.2. The device under item 1, characterized in that the ferrule is made from honeycombs to accommodate piles, and the shape and number of hundred correspond to the cross section and the number of piles.3. The device under item 1, characterized in that the yoke is provided with elements temporarily fixing it on the pile, made with its own hydraulic drive.
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
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: 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
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
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
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.
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.
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
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
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