Semisubmersible catamaran-type drilling platform

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.

5 cl

 

The invention relates to the construction of deepwater oil and gas drilling platforms, designed for use in conditions of the Arctic shelf.

The overall technical level of the semi-submersible drilling rigs (Semisubmersible rig). [Types of offshore drilling rigs". Electronic resource access Mode http://rig-s.ru/rigs conversion 01.12.2012].

The design of the platform includes a support, which provide buoyancy to the platform and a lot of weight to maintain the vertical position. In the process of moving offshore drilling rigs produce pumping and pumping air from the bottom of the case: when the air is pumped out, the installation of partially protoplanets, but does not reach the bottom and remains afloat. This provides the possibility of drilling at depths of up to 1500 meters. In the drilling process to achieve the necessary stability to fill the lower body platform with water and strengthen the platform 10-ton anchors. In stormy waters used for positioning the active steering.

The overall technological level of emergency protection when drilling offshore wells. "Sealing the mouth of the drilled wells is provided by the BOP. Remote closing of BOP equipment in emergency situations is provided from the main panel driven by the I, housed in a control station BOP outside of hazardous areas and remote control placed in the immediate vicinity of the cabin driller" [paper on the feasibility study THEO-project "Prirazlomnaya". Electronic resource. Mode of access: http.V/www.shelf-neft.gazprom.ru/images/materials/%.pdf accessed 30.11.2012].

Known floating semi-submersible offshore platform (patent RF №2163874), which has a freeboard deck and the underwater part. Between them are columns. The underwater part is dismantled submarines. In columns made mine connecting surface deck with submarines. The platform contains additional elements of the lattice, connecting submarines. The technical result of the invention is to reduce material and labor costs for the construction of offshore platforms, as well as to improve its navigation properties.

The lack of analogue is the lack of solutions for modernization of technological modules.

Known multi-purpose semi-submersible type Moss CS-50 MK/11 with a free deck, designed by Norwegian engineering company Moss Maritime As, having a patent for the production of such platforms. The unit is a self-propelled floating structure catamaran base type is with two pontoons and six stabilizing columns, supporting the upper hull and superstructure. This platform, the deck of which upgraded the drilling module and mini-plants for production and processing of oil produced at the Vyborg shipbuilding plant on the order of "Gazflot" for the Shtokman gas field [Murmansk. "The first semi-submersible platform for the Shtokman". Electronic resource available at: http://murmansk.russiaregionpress.ru/ accessed 30.11.2012].

The lack of analogue is the lack of modern technical solutions according to the technology of deepwater drilling.

The energy module is the world's first offshore ice-resistant fixed platform "Prirazlomnaya", registered in the Ship register of the Russian Federation, intended for drilling and workover vertical, inclined and horizontal wells, consists of the main azotobacteraceae installation (three azotobacteraceae type LM2500) of electric power 28 MW each, placed with all auxiliary systems in teplozvukoizolirujushchej containers that are designed for operation on the open deck. On the exhaust pipes of the three TG-equipped units utilizing exhaust heat (waste heat boilers thermal capacity of 25 MW each), designed to generate heat within the system [Electronic resource. Re the access: http://www.shelf-neft.gazprom.ru/images/materials/%DO%.pdf).

Known proposals for the organization of underwater-ice drilling on the Arctic shelf using nuclear-powered cruisers or icebreakers type "Ivan Papanin", converted into a drill ship [Century Larin. "Underwater drilling complex with a nuclear power plant for the development of oil and gas fields of the Arctic seas of Russia". Review Of "Bellona". Electronic resource. Mode of access: http://vmw.bellona.ru/filearchive/fil_Bellona__Wolking_Paper conversion 30.11.2012]. It was supposed to supply subsea drilling system power cable from the set on the source. As an energy source was assumed to use two nuclear power plants. One floating nuclear power plant with a capacity of 300 MW (PAES-300), the second submarine nuclear power plant with a capacity of 105 MW.

Experts argue that such projects are extremely dangerous, and the cost of implementation of such projects may not be recouped by the value of the extracted oil.

The closest analogue power unit platform adopted by the installation of gas pipeline transportation (patent for useful model No. 82290 F17D 1/04 publ. 20.04.2009. Bull. No. 11, author Icesnow VP). The unit has a nuclear reactor, a steam turbine, a generator for generating electrical energy, the refrigerant vapor and a pump for forcing water into the chamber atomic the reactor, which form a closed loop receiving superheated steam to rotate a steam turbine, which transmits torque to the compressor and gas generator to produce electrical energy.

Drilling platform Prirazlomnaya platform is not ready for operation on the Pechora sea shelf because of the danger of environmental pollution, said the world wildlife Fund and Greenpeace at the conference Alopecia in the city of Naryan-Mar [Electronic resource. Mode flocTvna:http://neftegaz.ru/news/view/l04796. Accessed 30.11.2012].

The closest technical solution according to the perfection of add-ons, integrated systems management and security, adopted by the authors as a prototype, the Deepwater Horizon semi-submersible oil platform ultra-deepwater drilling with a dynamic positioning system, built in 2001, the South Korean shipyard Hyundai Heavy Industries [Electronic resource. Mode of access: http://ru.wikipedia.org/wiki/Deepwater_Horizon accessed 30.11.2012).

Analysis of the practice of liquidation of the accident on the Deepwater Horizon in the Gulf of Mexico showed the lack of a comprehensive scientific and technical solutions for the elimination of such catastrophes. Turned out to be ineffective or missing tools prevent explosion and the deaths of the rig, which had a perfect automation technical monitoring and fire suppression. P is ichinoe occurrence of an accident is considered a failure of the emergency valve, equipped with a pressure controller (THIEF - blowout preventer), produced by Cameron. In addition to firefighting platform is not equipped with a set of devices on the elimination of accidents. Such scientific and technical solutions are missing in the world. This is confirmed by the fact helplessness action engineering headquarters of British Petroleum, completely unaware of the laws gushing streams, including the risk of huge accumulation of charges of static electricity and explosive combustion of oil and gas fluid effects a powerful choke effect and huge kinetic power flowing stream.

The aim of the invention is to increase the survivability of the drilling platform in terms of possible gas and spouting the downhole fluid.

The technical problem is solved by the fact that the semi-submersible platform catamaran base type, placed on two pontoons, the hull of which is supported by a stabilizing columns and vertical stretch anchor mount, computer dynamic positioning using underwater propulsion freeboard deck superstructure platform made in the form of drilling, process, power modules and functional blocks, with integrated system management and security equipped with means of monitoring the technical status the status of the production equipment, according to the invention has a satellite redundancy dynamic positioning computer platform via the navigation system "GLONASS"; and propulsion power module of energoobespechenty nuclear reactor, and the system of technical monitoring equipped with remote duplication with coastal structures able to respond to emergency situations; and integrated systems management and security have the technical means of liquidation of emergency situations. In the integrated process control system drilling embedded algorithms emergency use of the devices charge neutralization of static electricity flowing stream as an adequate way to prevent explosive combustion and recovery of the drilling platform.

Device for dielectrically stream contains moving parts, discharge and neutralizing the charges of static electricity hydrocarbon streams that occur when the friction between air and the flow of fluid moving at different speeds, the mechanisms of their forward-recoil movement and the grounding elements containing a grounded annular gaps, floating pneumatic rolling mechanism along the stream section stream intended for the introduction of the locking device. Design the I device disclosed in A.S. The USSR №1106029, 05F 3/04, authors Gerasimov E.M. and Babies GN. A distinctive feature of the proposed technical solution is the presence of a remote device, operate the Converter charges the jet directly at the occurrence of the latter.

Other mandatory emergency device that protects the platform from destruction at the flowing well fluid, is a device wellhead sealing within the rotary table. Thus, the retainer conical shape has a propulsion transfer the kinetic energy of the jets in rotational and back-and-forth; while the locking element is designed as a conical housing with axial and radial channels and cutters-tabs on its outer surface. Parts of the device disclosed in the as of the USSR №1327608, the authors Gerasimov E.M. and Babies G.N., as well as in the monograph Emersive "Emergency gas blowout. Problems and ways of their solution". Orenburg. IPK GOU GOU, 2004, 204 S. Distinguishing feature of the claimed device is the presence of a remote control device, directly introducing into the jet stop homing device for the emergency blow. While the introduction of devices charge neutralization of the stream and introducing a stream of homing stop condition the device as possible with the remote control rig winch, and remotely from onshore remote control rig.

The program of the automated motion control platform based on changing ice or wave situation, including changing modes of underwater propulsion, adjusted by data from satellite monitoring system regional situation without the participation of the personnel on duty on the platform.

The excess of electric and thermal energy produced by a nuclear reactor, allows its use for implementations protivoluchevykh events by heating the ballast water in the pontoons, as well as for heating of drilling table by applying air dushirovaniya the working area or through the organization heated floor. During the preliminary design plan to use the reactor type KLT-40 development of Nizhny Novgorod OKBM, with a capacity of 25-30 MW posted in modular design on the outer platform of the platform away from the functional (residential blocks), and the chiller unit pair to be placed in one of the pontoons of the platform.

The platform is designed to be reusable, and after pumping water from the pontoons are able to move to a new drill site itself or on boats.

1. Semi-submersible drilling platform is and catamaran base type, placed on two pontoons, the hull of which is supported by a stabilizing columns and vertical stretch anchor mount, computer dynamic positioning when using underwater propulsion freeboard deck superstructure platform made in the form of drilling, process, power modules and functional blocks, with integrated system management and security equipped with means of monitoring the technical condition of production equipment and have the technical means of emergency, which occurs naturally flowing stream of well fluid remotely give effect device charge neutralization of static electricity on the rig.

2. Platform according to claim 1 characterized in that the integrated system management and security have the technical means of liquidation of emergency situations, using the kinetic energy of the flowing stream.

3. Platform according to claim 1 characterized in that the computer dynamic positioning platform has satellite duplication through the navigation system "GLONASS".

4. Platform according to claim 1 characterized in that the propulsion power module of energoobespechenty nuclear reactor.

5. Platform according to claim 1 characterized in that the system technical what about the monitor is equipped with remote duplication able to respond to emergency situations.



 

Same patents:

FIELD: oil-and-gas industry.

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FIELD: oil and gas industry.

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FIELD: transport.

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1 dwg

FIELD: transport.

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2 dwg

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

Floating platform // 2518779

FIELD: transport.

SUBSTANCE: floating platform contains connected by at least one fixing element at least two floating elements each one of which consist of two side faces with at least one vertical projection on each of them with at least one vertical recess on each of them matching vertical projection. Vertical projection is made with narrowed portion changing into widened towards periphery portion to form supporting pad. Vertical recess features narrowed portion changing over into part widened towards the centre to from resting pad. On one of side faces at both sides of vertical projection there are flanges being supporting for corresponding fixing element. On the second side face at both sides of vertical projection there are two projections: one is at one side of this vertical projection and at least enveloping at least from above the corresponding fixing element, and the other is at other side of this vertical projection and at least supporting for corresponding fixing element. These two projections are parts of mating sockets of corresponding fixing elements.

EFFECT: higher reliability, enhanced operational functionality due to increased displacement and bearing capacity of platform.

3 cl, 5 dwg

FIELD: transport.

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=δïã, 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

FIELD: transport.

SUBSTANCE: invention relates to ship building, particularly, to production of ice-resistant platforms for exploration of freezing sea offshore oil and gas deposits. Proposed platform is equipped with remote turret assembly consisting of the block accommodating the turret and located outside platform hull to allow the latter to turn in external force main vector direction and to be retained in place by anchor system connected with said turret. Said block with turret are located under water ahead of fore perpendicular at the distance not smaller than half the difference between platform maximum length and that between perpendiculars. Block top is located level with the platform base plane. Said block features the hull axially symmetric shape with respect to vertical axis and is secured to platform hull with the help of corbel shaped to trihedral pyramid with clearance between ribs and facing the hull stem by its base. Pyramid two ribs are located in the platform base plane while third rib rests on said stem. Said rib features sharpened top edge.

EFFECT: higher safety of turret, anchor and riser lines in ice.

2 dwg

Floating platform // 2509025

FIELD: transport.

SUBSTANCE: invention relates to floating craft, particularly, to pontoons, floating docks and rafts. Floating platform comprises at least two flowing elements interconnected by at least one lock and composed by two sides with at least one vertical ledge at every said side and at least one vertical recess mating said ledge. Top face and bottom make hollow hull. Vertical ledge features narrowed part changing over in widened to make bearing plate. Vertical recess features narrowed part changing over into part widened towards the center to make bearing plate. One of said sides has locking element covering from above said ledge and bearing ledge on opposite side from said ledge. Support flange for locking element on side, on both sides of vertical ledge. Extra external ledge is made on side between vertical ledges.

EFFECT: increased displacement and tonnage at unchanged overall dimensions.

3 cl, 4 dwg

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

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