Method to erect ice-resistant platform
SUBSTANCE: method includes deepening and installation of an underwater part of the structure into bottom deposits, fixed fastening of a hollow board to it, made in the form of a ball segment with perforated surface. During assembly of the board its upper part is placed above the surface of the ice cover, and the base is submerged into water. Supply-and-exhaust shafts and tight hatches are placed into the cavity of the board. The underwater part of the platform is equipped with transition gateways and joint assemblies. A tunnel is installed from the platform to the coast, and in it they install a pipe canal, tight partitions, additionally it is equipped with transition gateways, joint assemblies. The tunnel is used as a permanent transport link and moorage for underwater vessels.
EFFECT: increased reliability of operation of hydraulic engineering structures of island type in Arctic seas.
The invention relates to the field of development of the resources of the continental shelf, and, in particular, to the construction in the Arctic seas island platforms type in terms of the drift of icebergs progress frozen ice fields.
There are technologies of construction in areas of icebergs drifting ice objects, for example: "the Method of construction of the Arctic platform" (U.S. Pat. No. 2238365, publ. 20.10.2004 - similar). The decision with regard to the protection of structures from ice impacts include: strengthening of bottom sediments, construction on the bottom of foundations, installation of the underwater and above-water parts support semi-submersible platform, equipped with ballast tanks and process equipment. The upper part of the structure is in the form of a pontoon, and submarine support facility is equipped for mounting and Dismounting bearings, towing and removal of the pontoon from the drift of icebergs. But at considerable cost, the method does not allow for safe operation of the Arctic platform at the movement on her frozen ice fields.
In relation to extreme conditions in the Northern seas there are various technologies, design solutions delivery vessels, underwater culverts and tunnels materials, equipment, and personnel used in the construction and operation of hydraulic facilities the response transportation of raw materials to consumers. Under these conditions, the transport must be conducted using approved developments, such as: "Device docking space object" (U.S. Pat. No. 2195417, publ. 27.12.2002 - similar). The device represents a transition gateway butt node and is intended for use underwater ships, and spacecraft.
Security platforms in the areas of drift annual, multiyear ice is provided by the known solutions, for example: "a Method of protection of hydraulic structures from ice movement in the Arctic seas" (ed. mon. The USSR №990954, publ. in bull. No. 3, 1983 - similar). The method includes: equipment platform island ice-breaking device type mechanism, the fastening structure to the bottom and approaching him ice, creating in the contact zone of the ice platform overpressure and its destruction. Tackle disadvantage is the limited performance ice-breaking device mechanism under intensive shearing of the ice fields.
From known designs, methods of construction of platforms in the seas with heavy ice conditions closest to the claimed solution is: "Island-resistant structures" (ed. mon. No. 1076519, publ. in bull. No. 8, 1984 - prototype). The construction includes the depth of the underwater part of its support in d is by deposits, fixed attachment to the support of the hollow shield, the upper part of which is placed above the ice surface, and the base is immersed in water. The shield is made in the form of a spherical segment with a perforated surface, equipped with supply and exhaust shafts, sealed hatches, ensure the safe operation of the platform under intensive shearing of perennial ice fields. However, the decision does not allow for logistics facilities in continuous drift of Arctic sea ice.
The objective of the proposed method is to increase the reliability of operation of the ice-resistant platforms.
The essence of the proposed solution is as follows.
The construction of the ice-resistant platform includes: slope, depth and installation of its underwater part in sediments, stationary fixed to the platform of the hollow shield, made in the form of a spherical segment with a perforated surface. When mounting the shield upper portion is placed over the surface of the ice cover and the base is immersed in water. In the cavity of the shield place of supply and exhaust shafts and sealed the hatches. The underwater part of the platform equip transitional gateways, connecting nodes. From platform to coast tunnels and place the pipe in a sealed bulkhead. The tunnel is additionally equipped with transitional ø what skidding and connecting nodes. The tunnel is constantly used as transport links, as well as berths for submarine vessels.
The method of construction of the ice-resistant platform is illustrated in the drawing, where Fig.1 shows a vertical section of the ice-resistant platform.
The implementation of the method provides for the following :
After delivery of the platform elements in developing the district installs, the depth of the underwater part of the platform 1 in sediments 2, fixed to the underwater part of the platform 1 of the hollow shield 3 made in the form of a spherical segment with a perforated surface (see Fig.1). In the cavity of the shield 3 place of supply and exhaust shafts 4 and sealed the hatches 5. The underwater portion of the platform 1 equip transitional gateways 6 and connecting nodes 7 and from the coast to the platform tunnels 8 and place in it the pipe 9, the sealed bulkhead 10. The tunnel 8 is additionally equipped with transitional gateways 6 and docking ports 7. The tunnel 8 is constantly used as transport links and pier for submarine vessels 11. At the movement of the ice cover in the zone of contact with the platform changes its direction and magnitude of pressure on the structure. In the process of moving on a spherical surface of the shield 3 ice collapses. Ice formed cracks and atmospheric air enters through the holes 12 and inlet-exhaust shaft 4 in perforirovannoi the part spherical shield 3 and the working cavity of the underwater part of the platform 1.
The proposed solution with optimal cost will ensure the operating reliability of the platform in the Arctic seas.
The method of construction of the ice-resistant platform, including installation, the depth of the underwater part of the platform in bottom sediments, attaching thereto a hollow shield, made in the form of a spherical segment with a perforated surface, placement in the cavity of the shield supply and exhaust shafts and sealed hatches, equipment underwater part of the platform transitional gateways and connecting nodes, the laying of underwater tunnels and siphons, characterized in that the hollow shield still fixed to its underwater part, then from the coast to the platform tunnels and in his oral place pipe, sealed bulkheads, additionally equip the tunnel transition gateways, connecting nodes.
SUBSTANCE: self-moving drilling ship has hull made capable to rotate relative to turret mounted in it with vessel mooring system, deck, accommodations, drilling well under turret, technological drilling facilities and drilling rig with drill string passing through turret and well placed on the main deck, propelling-steering complex, power plant located in the hull. Drilling rig with underrig space, technological drilling facilities, deck walkways and accommodations of vessel are winterized - protected against adverse environmental conditions by safety cages with heating system. Around lower part of drilling well, ring-shaped guard is installed to prevent ice entering. Turret, drilling well and drilling rig with drill string are located in fore part relative to midship section, and accommodations are located in aft part of vessel. The vessel is provided with helicopter deck, system for personnel safe emergency vessel escape in icy conditions, as well as with dynamic positioning system.
EFFECT: improved operational characteristics of drilling ship during prospecting and exploratory drilling on arctic shelf.
FIELD: oil and gas industry.
SUBSTANCE: platform consists of a cylinder-shaped semisubmersible hull placed vertically above and below the sea level. The platform hull has a concave part, which reduces its cross-section area. The concave part is formed discretely at the outside peripheral surface of the platform hull, at that the depth of the platform submersion is regulated so that in extreme sea conditions the water line is at the concave part level.
EFFECT: preventing vertical resonance of the platform in extreme sea conditions due to increase of free oscillation period for the platform heaving.
7 cl, 5 dwg
SUBSTANCE: method comprises use of marine technological complex comprising an offshore platform, subsea satellites and coastal technological base interconnected by technological communications. The drilling process is resupplied with robotic means of oil spill response at all possible stages of an emergency process. The wellbore fluid is pumped to the onshore processing facilities made in the form of a group of interconnected underground tanks. When pumping the wellbore fluid the energy of terrastatic pressure is used, if necessary, using the booster compressor station. Disposal of oil-field water is carried out by the method of geological purification by pumping into the absorbing deep ground, and only in case of critical terrastatic pressure drop is heated and used as liquid washing oil from the rocks of the productive formation. All the technological units of marine technological complex are supplied with electricity from the power unit of a nuclear reactor. The objects of the coastal technological base are electrically connected to the power unit of the nuclear reactor by means of the power cable.
EFFECT: increased efficiency and safety of development of hydrocarbon deposits of the Arctic shelf.
FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to deep water drilling oil and gas platform designed for operation at arctic shelf. Semi-submersible catamaran-type drilling platform is arranged at two pontoons, platform hull being supported by stabiliser columns and tensioned vertical mooring, with computer-aided dynamic positioning with the help of underwater propulsors. Surface deck superstructures are composed of drilling, processing, power production and functional modules. Integrated control and safety systems are equipped with production equipment conditions monitoring means and emergency elimination means to actuate by remote means at well fluid flowing the device of static electricity charges elimination at drilling platform.
EFFECT: higher survivability of drilling platform at well fluid flowing.
FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to compensators for vertical displacements of sea platform caused by roll. Device 100 serves to damp the forces between two interconnected parts in pipe string. Bottom part 101 is connected with top end of string element 105, 3a extending into underwater well 5. Top part 103 is suspended from self-floating surface plant 1 with the help of suspension element 3b extending to said surface plant. Device 100 is arranged pipe string above element 3a extending into said underwater well and above at least one part of said suspension element 3b. Device 100 comprises top and bottom sections 109, 111. Said sections can vertically displace relative to each other to cause pliancy to impact forces between said interconnected top and bottom parts 103, 101. Said impact forces are caused by roll of suspension elements 3b displacing relative to string element 3a.
EFFECT: efficient damping and protection of thread extreme turns.
15 cl, 7 dwg
SUBSTANCE: underwater structure (US) operates at depth in the range from 100 to 120 m from sea level. At the same time the US comprises a support-bearing underwater complex and a drilling complex or a production complex. The support-bearing underwater complex includes a support-bearing plate and a wellhead complex. The support-bearing plate, in its turn, comprises a wellhead block, an energy block, a residential block, and also a life support block, internal and external circular corridors, radial transitions, sectioned ballast pontoons of circular shape and propelling agents. Retention of the underwater structure in the vertical position at the specified point for the whole period of stay is provided by control of filling of ballast pontoon sections, at the same time retention in the horizontal plane is done due to operation of the propelling agents. The inner surface of the body of the drilling complex and the production complex is congruent to the external surface of the wellhead complex, and the lower surface of the body of the drilling complex and the production complex is congruent to the upper surface of the support-bearing plate.
EFFECT: increased safety, reliability and quality of performed works.
13 cl, 5 dwg
FIELD: oil and gas industry.
SUBSTANCE: submerged structure operates at a depth within the range of 70 up to 120 m of the sea level. At that the base of the submerged structure is represented by a circular bearing plate/deck with process modules in the form of sectors; wells are located in the centre of the circular bearing plate/deck in the mouth module. At the base around the mouth modules in the sectors there are free moving vertical modules: living, drilling, operational, processing, power supply and conditioning ones. Inside the base of bearing plate/deck around the mouth module there are corridors: an inner and outer, at that the inner and outer corridors are interconnected by mutually perpendicular passages. Between the inner and outer corridors there is a circular ballasting container; under the outer corridor there are mutually perpendicular electric propulsion units. The method ensures operation of the above universal submersible structure.
EFFECT: improving safety and quality of performed operations both in process of well drilling and operation.
11 cl, 5 dwg
FIELD: oil and gas industry.
SUBSTANCE: device includes pipeline (24) for transfer of fluid medium, tower (16), floating barge (18) installed so that it can be turned around tower (16) about rotation axis (A-A'). Pipeline (24) includes section (150) of a hose, which is wound about rotation axis (A-A') and retained with intermediate structure (20) installed between tower (16) and barge (18) between a configuration of joint rotation together with barge (18) about the rotation axis and a configuration of retention with tower (16) during rotation about rotation axis (A-A'). At the stage of connection of pipeline (24) intermediate structure (20) is installed into one of the configuration of rotation or retention; with that, the disconnection stage of pipeline (24) includes a transition piece of intermediate structure (20) to the other configuration of either rotation or retention.
EFFECT: quick and reliable disconnection so that quick repeated connection of a transfer pipeline is provided.
18 cl, 12 dwg
SUBSTANCE: according to the invention, inside the housing of a drilling ship mooring turret, which has a cylindrical housing with a drilling shaft and an anchor retention system of the ship, in its lower part there installed is an annular cylindrical structure with ballast compartments, which can move vertically along guides below the main plane of the drilling ship. Inside the shaft there arranged are deflectors located along the perimeter of the shaft on its walls above the ship waterline.
EFFECT: invention of a drilling ship mooring turret structure allows protecting a riser pipe at drilling operations under ice conditions and protecting against flooding of an upper deck of the drilling ship through the drilling shaft at stormy drift or at transition of the drilling ship under conditions of considerable disturbance, especially at negative air temperature contributing to formation of ice on deck structures of the drilling ship.
FIELD: oil-and-gas industry.
SUBSTANCE: underwater rig comprises two submarines, one making deep-water drilling complex. Said complex consists of two modules, one making process module for executing the entire cycle of well construction and another one making the drilling module. Second submarine represents a nuclear underwater power production complex. Process module comprises drilling module supercharging system, storage battery compartment connected with cable joint. Process module top section is equipped with float emergency chamber with docking assemblies and self-propelled submarine while bottom section is provided with lock chamber with lifter. Drilling module is arranged vertically relative to process module and connected therewith by pipeline and power cables. Drill rig with hydraulic drive is arranged at drilling module centre. Bottom thrust plate, set of preventers, drill tool are arranged in drilling g module axial plane while pipe feed and making-up automatic device is arranged on opposite side.
EFFECT: higher efficiency.
SUBSTANCE: method includes the installation along the platform perimeter of the protective cladding structure. Meanwhile before placing the platform into design position along the platform perimeter with a clearance at least one row of supports from metal piles with round section sunk into unstable bottom sediments or into bed rocks. Into piles the coolers are mounted, and artificial freezing of water and ground around piles, and the monolithic cylinders, formed around piles - ice and grounding in the base and icy in water, shall contact the adjacent cylinders, forming continuous ice and ground in the base and icy in water protective anti-chock and impervious wall.
EFFECT: improvement of efficiency of an engineering protection of platforms of a floating type in conditions of the Arctic shelf.
6 cl, 3 dwg
FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to development of oil and gas deposits and can be used for anchoring of mining equipment at sea bottom. Proposed method comprises fitting the pile anchor in place by screwing the cylinder in soil, well drilling via wellhead, lowering of reinforced well casing in the well and cementing the string inner space. Note here that casing pipe is pre-furnished with lengthwise sawcuts. Prior to cementing of casing string, charge is lowered to 1.5-2.0 m from well bottom to explode its so that inverted plume is formed in the area if sawcuts as well as cavities in soil to be filled with concrete.
EFFECT: higher reliability of retention.
FIELD: oil and gas industry.
SUBSTANCE: invention is related to facilities of the continental shelf development. An offshore floating platform contains an undersea displacement module, a support subsea module with rigid support columns and binders, and straining ties fixed at seabed anchors. The support columns and binders can be detached from the undersea module in order to escape quickly from an ice-hazardous area and to return back to the abandoned place. The subsea module is made of individual sealed pontoons interconnected by rigid ties capable of limiting relative motion. The support columns of the subsea module are equipped with mechanisms for connection to pontoons of the undersea module and for interconnection of the modules.
EFFECT: improved reliability of the modules coupling/decoupling, simplified ballasting process.
6 cl, 5 dwg
SUBSTANCE: invention relates to construction of platforms to mount drilling and oil production equipment in the sea. The support stand-anchor of the marine platform comprises joined upper section with the upper support site, ballast cisterns-sections and the lower drilling section, in which there is a hydraulic engine installed, to the shaft of the rotor of which a drill is connected, and a pipeline of water drain and a nozzle of water drain are connected to the stator of the hydraulic engine. At the same time on the marine platform in the control cabin the system of filling-emptying of ballast cisterns-sections additionally comprises a compressor for compressed air, the outlet of which via serially connected first valves and three-way switching valves are connected to pipelines of compressed air supply, hydraulic pumps. Between ballast cisterns-sections there are remote support sections, the upper section is made in the form of two coaxial hollow cylinders arranged relative to each other coaxially. The upper support site by means of hinge parts rigidly connected to it and the marine platform, may rotate around the common axis of the hinged joint, and with it the entire support stand of the anchor with removal of the bolt joints by means of its transition from the vertical working position into the horizontal transport position.
EFFECT: expansion of functional capabilities of a support stand-anchor and reduction of axial load.
SUBSTANCE: versions are disclosed regarding implementation of designs of a gravity foundation, which comprises the first and second extended foundation sections divided with an open area and made as capable of maintaining weight in water for the specified structure and resting against the bottom of the water area, and an upper section arranged above the specified open area and made as capable of passing at least partially above water surface to maintain the upper structures. Some versions of implementation additionally contain the first and second inclined sections, which connect foundation sections with the specified upper section.
EFFECT: improved design.
20 cl, 8 dwg
SUBSTANCE: invention relates to ship building, particularly, to sea gravity ice-breaking platform to be used in shallow water. Said platform comprises bearing plate composed of hollow body dividing in compartments filled with ballast and top displacement hull with processing and ship equipment built in bearing base deck closed elevation to uncouple them. Inner boundary of said deck elevation is equidistance in plan with floating structure outlines with difference in sizes defined by the relationship: δ=δï+δã, where δis aforesaid difference, δï is maximum sum of construction deviation of sizes ob said body and hull from rated values, δãis guaranteed clearance required for alignment of top structure with platform bearing base outline.
EFFECT: higher operating efficiency in ice.
2 cl, 2 dwg
SUBSTANCE: invention relates to sea gravity platforms for exploration of oil and gas deposits at continental shelf. Proposed platform comprises submersible offshore platform composed by bottom and top bearing plates, sidewalls and internal bulkheads. Bell consisting of separate sections is hinged to submersible platform bottom part. Every said section comprises vertical wall, stiffness ribs and guide pipes. Stiffness ribs have support elements at the points of abutting on bottom plate. Submersible platform sidewalls includes element for attachment of said bell in transport position and recesses to accommodate retainer pints.
EFFECT: higher stability, low draft, fast assembly and disassembly.
SUBSTANCE: platform comprises a support base made in the form of a bottom board with a developed surface, strongly connected with a perpendicularly installed ice-resistant support block, somewhat protruding towards the bottom below the level of the near-bottom plane of the board. At the same time the ice-resistant support block is made in the form of a cylindrical column; special pipes - water-separating columns installed into the ice-resistant support block, through which operating wells are drilled; a superstructure made in the form of three replaceable floating decks with U-shaped cuts in the centre: decks of civil construction purpose, decks of drilling purpose and decks of operational purpose, at the same time U-shaped cuts are made as congruent to the cross section of the ice-resistant support block; detachable lifting mechanisms installed on the outer side along the perimeter of the U-shaped cut of the deck, engagement or disengagement with the support base is provided, as well as movement and fixation of the deck at the safe height of the ice-resistant support block; piles for fixation of the support base drilled with a drilling plant along a curvilinear trajectory provide for safe operation of the structure.
EFFECT: increased reliability of operation and process safety of an area of water during civil construction and drilling works.
3 cl, 3 dwg
SUBSTANCE: support structure of a marine complex, designed for installation in shallow water, is characterised by the fact that it comprises at least two supports installed in shallow water, every support is made of at least one rigid shell closed along the perimetre and filled inside with stone material, besides, the lower shell of the support is installed on the sea bottom, and each of the above installed shells in the lower part is made of smaller size along the perimeter that the perimetre of the upper part of the more lower shell. Besides, at least a part of the upper shell is made with a cone shape. Each support is made as capable of installation of process objects and equipment of the marine complex and placement of elements that combine separate process objects into a whole marine complex between supports. The specified upper shell has a diameter in the range from 30 to 60 metres.
EFFECT: provision of efficient protection against ice and wave loads, reduction of construction time, lower material intensity.
24 cl, 12 dwg
SUBSTANCE: method for coupling of a floating caisson, having funnel-shaped foundation shells, with a base (also with unprepared bottom of a water area), includes fixation of the design position of the floating caisson by means of its installation onto mounting supports or piles and filling with a material of artificial base into internal cavities of the funnel-shaped foundation shells. Actions of base protection (including an artificial one) are implemented from washing with flows of water that washes it.
EFFECT: increased reliability and durability of a base in a floating caisson, increased manufacturability: its coupling with a base.
7 cl, 1 ex, 1 tbl, 6 dwg
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