128 results about "Offshore drilling" patented technology

The invention relates to the technical field of artificial intelligence technology and oil and gas engineering information processing, and discloses an intelligent questioning and answering method and system for offshore drilling, logging and completion based on large language model fine tuning and multi-modal retrieval enhanced generation (RAG) technology. The method comprises the steps that multi-source data such as texts, images, charts and tables related to well drilling, well logging, well logging and well completion are collected, format normalization, semantic segmentation and vectorization processing are carried out, and a multi-mode knowledge base with unified coding is constructed; wherein the image and the complex table are not directly subjected to vector modeling, but are associated with descriptive text paragraphs in a link mode, and the text paragraphs participate in unified retrieval after semantic coding. According to the method, multi-round interaction is supported, related images, charts or structured table resources are embedded according to the answer types, and multi-modal mixed output is achieved. The system collects user feedback information and constructs a knowledge credibility label for driving knowledge base updating and model continuous optimization.

The invention provides a marine drilling shallow gas monitoring and shunting device and method. The marine drilling shallow gas monitoring and shunting device comprises a wellhead sealing and shunting device, a formation fluid monitoring and shunting device and a remote control device. The method comprises the steps of determining the direction of a blowout prevention pipeline, selecting the size of a blowout pipeline suitable for construction, establishing a calculation model and conducting risk assessment, conducting software comprehensive analysis to achieve early warning on early discovery of shallow gas, designing a pipeline anti-blocking purging device, and remotely controlling the blowout direction of the blowout pipeline. Through the novel wellhead sealing and shunting device, the micro-flow shallow gas monitoring device, the remote rapid shunting blowout device and the pipeline anti-blocking device, and a remote monitoring and control module, rapid judgment and early warning of early discovery of shallow gas are realized in a real-time sealed wellhead environment, and related valve states are rapidly acted, so that the safety of a well is ensured. And the well control risk is reduced, and the harm of shallow gas to a drilling platform and operators can be fundamentally solved.

The invention belongs to the technical field of marine corrosion protection, and particularly relates to a multi-metal flushing corrosion inhibitor and a preparation method thereof, benzotriazole and isocyanate propyl triethoxy silane or isocyanate propyl trimethoxy silane are used as raw materials, and a novel benzotriazole corrosion inhibitor containing a silane structure is synthesized through catalysis. The benzotriazole containing the silane structure is compounded with corrosion inhibitors such as organic acid salt, organic acid polymer and organosilane to form the multi-metal flushing corrosion inhibitor for steel, aluminum alloy and copper, which does not contain nitrite, phosphate and heavy metals (lead, cadmium and mercury). When in use, the corrosion inhibitor is diluted to 0.2-0.5%, the corrosion inhibitor is applied to flushing protection of offshore drilling platforms, marine investigation equipment and coastal facilities through flushing and spraying processes, a corrosion inhibitor protective film is formed on the basis of removing a surface salt film, corrosion of multiple metals such as steel, aluminum alloy and copper alloy in a marine atmospheric environment is effectively inhibited, and the corrosion inhibitor has good environmental friendliness.

The invention relates to a method, a device, equipment and a medium for predicting the fatigue crack life of an offshore well drilling rack, and is applied to the technical field of engineering equipment life prediction. Analyzing the monitoring data and the video data to determine a crack condition; acquiring historical life information, current task information and current environment data; and analyzing the crack condition, the historical life information, the current task information and the current environment data to obtain a life prediction condition. The method has the effect of improving the accuracy of predicting the crack propagation life of the offshore well drilling rack.

The utility model discloses a quick connecting device for an instrument in a near-bit screw, which relates to the technical field of marine drilling equipment and comprises an inserting male head, a positioning sleeve, an elastic component and an inserting female head, a first end of the inserting male head is used for being connected with a near-bit measuring connector, and a second end of the inserting male head is provided with a first inserting hole; a first insertion hole is formed in the positioning sleeve, an insertion head is arranged in the first insertion hole, a first end of the positioning sleeve is inserted into the first insertion hole, a first end of the insertion female head is used for being connected with an instrument string in a screw rod, a second insertion hole is formed in a second end of the insertion female head, and when the insertion male head is inserted into the insertion female head, the insertion head of the insertion male head is inserted into the second insertion hole of the insertion female head. The second end of the insertion female head is inserted into the positioning sleeve and abuts against the transmission spring in the second insertion hole so that the near-bit measuring connector and the instrument string in the screw can conduct signal and electric energy transmission, and the second end of the insertion female head is inserted into the positioning sleeve and abuts against the elastic assembly in the insertion male head so that the pin shaft of the insertion female head can be clamped into the anti-disengaging groove of the positioning sleeve.

The utility model discloses pipeline flaw detection equipment for an offshore drilling platform, which belongs to the technical field of pipeline flaw detection equipment and comprises a mounting plate and a square plate which are distributed left and right, a rectangular mounting frame is fixedly mounted at the lower end of the mounting plate, a rotating wheel is rotatably mounted in the mounting frame, and square pipes are fixedly mounted on two sides of the upper end of the mounting plate. An L-shaped rod capable of moving up and down is installed in the square pipe through a driving assembly, square blocks distributed in a rectangular shape are fixedly installed at the lower end of the square plate, a square groove is formed in one end of each square block, one end of the L-shaped rod is inserted into the corresponding square groove, an X-ray flaw detector is fixedly installed in the middle of the square plate, and the X-ray flaw detector is driven by a driving wheel to move. The circular pipe flaw detection device is simple in structure, capable of comprehensively detecting flaws of circular pipes, convenient, rapid, low in cost, capable of detecting flaws of pipelines of different sizes by adjusting the height of the L-shaped rods and the distance between the mounting plates, and high in practicability.

The utility model discloses a device for collecting residual liquid in a casing pipe, and belongs to the technical field of offshore well drilling and workover. The device for collecting the residual liquid in the casing pipe comprises a casing pipe sealing piece, and a compressed air input device and a liquid discharging device which penetrate through the casing pipe sealing piece are arranged above the casing pipe sealing piece. And an extension pipeline is arranged below the sleeve sealing piece and is communicated with a compressed air input device. According to the utility model, the residual liquid above the cutting depth in the sleeve is collected through the liquid discharging device by using compressed air, so that the purpose of efficiently recovering the residual liquid in the sleeve can be achieved, and the influence of the residual liquid on operation is reduced. The device is suitable for recovering residual liquid in the casing pipe before the casing pipe is cut in the offshore drilling and workover operation, is particularly suitable for collecting oil-based / synthetic-based mud, and is also suitable for collecting water-based mud or other liquid.

The invention belongs to the technical field of ocean engineering equipment, and provides an ocean energy power generation system for an ocean drilling platform, which comprises a plurality of supporting columns for supporting the ocean drilling platform, and further comprises a floating assembly comprising two groups of movable sliding plates which are vertically and slidably connected to the two adjacent supporting columns respectively, a buoy is fixedly connected between the two movable sliding plates, a generator is fixedly connected to the movable sliding plates, a first driving mechanism is arranged between a rotating shaft of the generator and the supporting column, and the first driving mechanism is used for driving the generator to rotate when the movable sliding plates reciprocate up and down; and the second driving mechanism comprises a paddle assembly arranged in the buoy, the paddle assembly is used for converting kinetic energy of ocean current into mechanical energy, and the paddle assembly is in transmission connection with the two generators. Kinetic energy and potential energy of seawater can be efficiently utilized for power generation to be used by an offshore drilling platform, and dependence of the platform on energy supply is reduced.

The offshore drilling off-line root setting device comprises a derrick, the derrick is fixed to a drill floor face, a catwalk is installed on the front side of the drill floor face, an auxiliary iron roughneck is arranged between the catwalk and the drill floor face, the auxiliary iron roughneck is provided with a first rat hole and a second rat hole in an opposite mode, and a third rat hole is formed between the catwalk and a well mouth. A main iron roughneck is arranged on the side, close to the well mouth, of the drill floor face, and a bridge type lifting machine is installed on the derrick. The invention also discloses a method for establishing a root by using the root establishing device. According to the offshore drilling off-line root establishing device and method, the problem that top drive drilling operation and off-line root establishing operation of a single-derrick drilling system cannot be carried out at the same time is solved.

The present invention discloses a subsea wellhead simulation test device and a test method for deep - water offshore drilling. The device includes: a kettle body, the chamber of which is used to fill with soil layers; earth pressure gauges, which are used to be distributed in the soil layers; a surface conductor, the bottom end of which is located in the soil layer and the top end is located above the soil layer; a subsea wellhead device, which is installed at the top end of the surface conductor; a riser, which is connected above the surface conductor through the subsea wellhead device; a tensioner, which is connected to the top end of the riser; a platform device, which is arranged on the tensioner; an experimental frame, which is erected around the kettle body; a push - pull motion device, which is used to simulate the marine environmental loads and the motion of the platform device; a height - adjusting mechanism, which is used to change the height position of the push - pull motion device; and a controller, which is electrically connected to the earth pressure gauges, the subsea wellhead device and the tensioner. The present invention can simulate the influence of the marine environmental loads on the subsea wellhead in deep water to reveal the variation law of the interaction between the deep - water surface conductor and the soil body.

The utility model discloses a different-depth water sample collecting device for offshore drilling. The different-depth water sample collecting device comprises a barrel body and a barrel cover, a gravity block is connected to the cylinder body, a lifting handle is connected to the upper portion of the cylinder bottom, and an inelastic rope A is connected to the lifting handle; the cylinder cover is matched with an opening in the top of the cylinder body and is in sliding fit with the handle, the bottom of the cylinder cover is connected with a sealing piece, and the cylinder cover is connected with an upper opening of the cylinder body through a magnetic piece; the top of the barrel cover is connected with a lifting hook, and the lifting hook is connected with an inelastic rope B; the size of a cylinder opening of the cylinder body is smaller than the size of the outer diameter of the cylinder body; and the gravity block is a solid body and is fixedly connected to the bottom end of the cylinder bottom. Compared with the prior art, the water sample obtained by the device disclosed by the utility model is more representative, the test data is more accurate and reliable, and the device can be reused.

The invention discloses a connection auxiliary device for lowering and recycling an offshore flange connection type hose, and relates to the technical field of offshore drilling construction, which comprises a base bracket, a rotating wheel frame and a sliding plate bracket, one side of the base support is rotationally connected with a lower guide wheel and a front guide wheel, and the lower guide wheel and the front guide wheel are arranged in an up-down staggered mode to form a guide space for limiting and guiding a flange hose. The rotating wheel frame is rotationally connected to the base support, a plurality of rotating wheel guide wheels are rotationally connected to the rotating wheel frame, and the hose is lapped on the rotating wheel guide wheels; the sliding plate support is arranged on one side of the top of the base support, a lower clamping plate and an upper clamping plate which can be opened and closed are arranged on the sliding plate support, and when the lower clamping plate and the upper clamping plate are closed, a clamping opening for clamping a lower flange of the flange hose is formed. Through the synergistic effect of the base support, the rotating wheel frame and the sliding plate support, the stable guiding and clamping functions of the flange hose are achieved, the labor intensity of workers is effectively reduced, the construction efficiency of lowering and recycling the hose is improved, and meanwhile the operation risk is reduced.

The invention belongs to the technical field of drilling platforms, and particularly relates to a high-stability offshore drilling platform which comprises a workbench, a supporting column is installed on the workbench, a pushing block is arranged in the supporting column in a sliding mode, and the pushing block makes contact with a tool bit; the extension assembly comprises a first pull rope, and the upper end of the first pull rope extends into the tool bit to be connected with an extension plate; the expansion assembly comprises an expansion plate; and the driving assembly comprises a winch, a second pull rope and a third pull rope are fixed in the winch, and the second pull rope and the third pull rope are connected to the upper side and the lower side of the expansion plate. When the drilling platform is installed, the contact area between the drilling platform and deep soil of a seabed can be enlarged, the stability of the drilling platform is improved, the area of the workbench can be expanded in a conventional state, and the expanded plates are inserted into the seabed when stormy waves are large, so that the stability is further improved.

The utility model discloses a positioning auxiliary assembly of an ocean drilling coring device, which comprises tension sensors, a plurality of groups of tension sensors are respectively provided with a frame body, and a shaft body of a grooved wheel movably penetrates through the plurality of groups of frame bodies. According to the utility model, the double-thread screw drives the two groups of rod bodies to laterally move towards one end and the other end respectively, and the rod bodies can drive the column bodies to move out of the first grooves at the tension sensor, so that the frame body can drive the grooved wheel to complete disassembly and assembly, and the disassembly and assembly process of the grooved wheel driven by the frame body becomes simple and rapid. Compared with a traditional complex disassembly and assembly method, a large number of professional tools and tedious steps do not need to be used, an operator can complete replacement of the grooved wheel in a short time, the equipment maintenance efficiency is greatly improved, the interruption time of ocean drilling coring operation caused by replacement of the grooved wheel is shortened, and time cost and economic losses are reduced.

The invention relates to the technical field of pipeline supports and hangers, discloses a damping corrosion-resistant pipeline support and hanger for an offshore drilling platform, and solves the problems that the damping effect of an existing pipeline support and hanger for the offshore drilling platform cannot be adjusted in real time according to the vertical shaking strength of the platform, so that a pipeline is easily damaged by vibration, and the service life of the pipeline is prolonged. The device comprises a supporting frame, a positioning plate is arranged above the supporting frame, a pipeline body is placed in the middle of the top of the supporting frame, the surface of the pipeline body is sleeved with a locking hoop, the bottom of the locking hoop is fixedly connected with the top of the supporting frame through a bolt, and a vibration sensor is fixedly installed in the middle of the bottom of the positioning plate. A control panel is fixedly mounted on one side of the bottom of the positioning plate; mounting cylinders are fixedly mounted at two ends of the bottom of the positioning plate; according to the pipeline support hanger for the existing offshore drilling platform, the damping effect can be adjusted in real time according to the vertical shaking strength of the platform, a pipeline is prevented from being damaged by vibration, and the service life of the pipeline is prolonged.

A gimbal device for suspending a riser on a mobile offshore drilling vessel (MODU), comprising a first frame, a second frame and plurality of cushioning units, wherein each of the said plurality of cushioning units are circumferentially positioned in between the first frame and the second frame, wherein the gimbal device further comprise of a plurality tethering items, wherein of the said plurality of tethering items are circumferentially positioned in between the first frame and the second frame.

Methods, systems and devices that utilize a mobile offshore drilling unit (MODU) with other integrated equipment, hereinafter a mobile offshore production unit (MOPU) or a traditional floating production unit (FPU) to produce oil and natural gas from an oil and gas containing subsea geological formation are described. When the MOPU / FPU consumes all produced natural gas in one or more processes onsite to produce products selected from power, liquid petroleum products, hydrogen gas, solid carbon, and combinations thereof, then the production unit is transformed into a Modular MOPU™. Some produced natural gas is used to generate electricity for normal facility operations and additional natural gas consumed to generate electricity for various 4th-phase processes or used as feedstock for the production of value added products in processing equipment such as pyrolysis units, and / or gas-to-liquids units. Maximizing consumption of produced natural gas onsite, optimizes oil production without flaring, and without any export pipelines.

The present application relates to the technical field of offshore oil drilling and sampling equipment, and particularly relates to a double-layer combined coring drill rod for offshore drilling. The present application relates to the technical field of offshore oil drilling and sampling equipment, and particularly relates to a double-layer combined coring drill rod for offshore drilling. The double-layer combined coring drill rod comprises a drill bit, a first drill rod, a second drill rod, a first sleeve, a second sleeve and two sets of limiting assemblies. The first sleeve is sleeved on the outer wall of the first drill rod, the second sleeve is sleeved on the outer wall of the second drill rod, the second drill rod is connected with the first drill rod, the drill bit is connected with the second drill rod, the limiting assembly comprises a sliding rod, a pull block, a limiting spring, a bearing block and a clamping sleeve, the second sleeve is provided with a bearing groove, the bearing block is matched with the bearing groove, the clamping sleeve is fixedly connected with the bearing block, the first sleeve is provided with a groove, the limiting spring is arranged in the groove, the clamping sleeve is further fixedly connected with the limiting spring, the two ends of the sliding rod are fixedly connected with the clamping sleeve and the pull block respectively and are inserted into the groove, and the sliding rod is slidably connected with the first sleeve. Through the arrangement of the above structure, the drill rod is convenient to transport when working at sea.

The utility model discloses a maritime work crane arrangement structure on an oil drilling platform. The maritime work crane arrangement structure comprises the drilling platform capable of ascending and descending; the expansion platform and the extension platform are fixed to the side edge of the drilling platform, and the platform space is expanded on the drilling platform through the expansion platform and the extension platform; a maritime work crane is installed on the expansion platform, and a platform extension anti-shaking shelf is installed on the extension platform to support a lifting arm of the maritime work crane. The platform space is expanded by installing the expansion platform and the extension platform on the drilling platform, the crawler crane is installed on the expansion platform and the drilling platform through the walking track, or the maritime work crane is installed on the expansion platform, and the extension platform is provided with the platform extension anti-shaking shelf for supporting a suspension arm of the maritime work crane. The problem that installation of a crawler crane or a maritime crane cannot be met due to the fact that an offshore wind power construction platform transformed from an oil drilling platform is small in space is solved.

The present invention relates to a directional method for dense cluster well groups. Mainly, the bend point mark of a single-bend positive displacement motor is projected onto the wellhead by means of mark annotation, and then the orientation of the bend angle of the positive displacement motor is determined according to the orientation of the offshore drilling platform / the orientation of the derrick door of the drilling rig / the ground compass method. Then, the bend angle of the single-bend positive displacement motor is rotated to the device angle required for orientation through the rotary table / top drive, and then the orientation starts until the magnetic interference of the measurement-while-drilling instrument disappears and the true and error-free magnetic device angle and azimuth angle can be measured. Finally, it switches to the normal directional mode to continue the operation. This method can effectively avoid the use of high-cost instruments such as wired / measurement-while-drilling gyroscopes, which increases the operation steps and operation costs. It has the characteristics of simple operation, low cost, and high success rate, and can effectively solve the problem of initial orientation of shallow layers in dense cluster well groups.

The application discloses a method and device for determining a drilling path at sea and an electronic device. The application relates to the field of ocean engineering automation. The method comprises: creating an ocean environment model; under the ocean environment model, path information of a plurality of target drilling paths of a drilling ship at sea is determined by using a plurality of path planning algorithms respectively, with the aim of minimizing a comprehensive cost, wherein the comprehensive cost is determined by a plurality of sub-costs and preset weights corresponding to each sub-cost, the plurality of sub-costs include an energy consumption cost, a time cost and a satisfaction cost, the satisfaction cost is determined according to a satisfaction index, and the satisfaction index is used to quantify at least an operation safety degree and a navigation comfort degree of the drilling ship at sea according to the drilling path; and the path information of the plurality of target drilling paths is output. The application solves the technical problem that it is difficult to simulate the complex changes of the ocean to plan the drilling path for the ship due to the fact that only a single index is considered when the drilling path is determined.

The invention relates to the technical field of water drilling machine auxiliary equipment, and provides a floating connecting device of an on-board drilling machine, which is used for connecting the drilling machine to a floating ship deck in a floating manner and comprises an adjusting frame, a bracket and a telescopic adjusting unit, a sliding seat capable of moving up and down is connected to the adjusting frame in a sliding manner; one end of the bracket is hinged with the sliding seat; the bearing seat is used for bearing the drilling machine and can drive the drilling machine to lift under the action of the sliding seat; the number of the telescopic adjusting units is two, the two telescopic adjusting units are symmetrically supported below the two sides of a middle shaft of the bracket, the lower ends of the telescopic adjusting units are hinged to a floating ship deck, the upper ends of the telescopic adjusting units are hinged to the bottom of the bracket and are in sliding fit with the bracket, and the upper ends of the telescopic adjusting units can slide towards the side close to or away from the adjusting frame relative to the bracket. The height and the inclination angle of the bracket are adjusted. According to the technical scheme, the problem that relative positions of the drilling machine and the submarine pipeline deviate due to lifting along with the sea surface during construction of the offshore drilling machine in related technologies is solved.

The present application belongs to the technical field of submarine pipeline laying, and particularly relates to a high-precision butt joint method, system and equipment for submarine pipeline laying under rocks, aiming to solve the problem that the accurate butt joint construction of the existing submarine directional drilling crossing technology can only be carried out in the horizontal direction of land or the crossing drilling between land and land. The present application comprises the following steps: through a sea drilling ship, a positioning drill bit carrying a magnetic source beacon is made to drill down through a drill rod in the butt joint sea area, a guide source is set, the first butt joint drilling tool is guided to drill to a preset butt joint area and the through position is recorded through the guide source, the first butt joint drilling tool is retracted, the second butt joint drilling tool is guided to the through position through the guide source, and directional drilling is completed. The present application enables the horizontal directional drilling construction based on magnetic source positioning to carry out rock butt joint operation in any sea area where offshore drilling operation can be carried out, and solves the problem that the butt joint in rocks between the ocean and islands can only be carried out in one-way operation.

The present application relates to the technical field of drilling and workover simulation, in particular to a sea-land drilling and workover simulation system and method based on digital twinning, which comprises the following steps: collecting parameter information in the drilling and workover process, dividing the drilling and workover process of sea-land drilling and workover according to the parameter information to obtain multiple work levels; establishing the association relationship between each work level, constructing a simulation model of sea-land drilling and workover according to the multiple work levels and the association relationship therebetween; constructing a real-time digital twinning model of sea-land drilling and workover as a temporary model corresponding to the simulation model of sea-land drilling and workover, determining an environment area to be updated from the multiple work levels according to the association relationship; determining a level area to be updated corresponding to the environment area to be updated from the temporary model, which can adjust the simulation environment of the simulation model according to the change of the actual environment parameters, thereby improving the accuracy of the simulation.

The present invention relates to the technical field of natural gas hydrate extraction, and specifically to a device and method for depressurizing and extracting marine natural gas hydrates. The device comprises an offshore drilling platform, a drill string, a casing, and a conduit. The drilling platform can lift or lower the drill string, the casing, and the conduit. A first pipe is provided inside the drill string, and a drill bit is fixedly connected to the bottom. The casing is sleeved on the outer peripheral side of the drill string and forms an annular accommodation space between the casing and the drill string, and an annular sealing device is provided on the side wall. The conduit is arranged in the annular accommodation space and is provided with a pressure regulating device. The side wall is provided with a slit and is connected to the casing and the hydrate layer through a circulation device. Fracturing fluid is introduced into the hydrate layer, and the pressure in the conduit is adjusted until the hydrate reaches the phase equilibrium point and decomposes, and then the natural gas is collected to the offshore drilling platform through the conduit. After the extraction is completed, the drill string, the drill bit, the casing, and the conduit can be lifted and recovered by controlling the offshore drilling platform, and then recycled after disassembly and cleaning, which not only improves the extraction efficiency but also reduces the extraction cost.

The invention belongs to the technical field of natural gas hydrate (combustible ice) exploitation, and particularly relates to a method and system for exploiting hydrates through super-long gravity assisted heat pipes in a depressurization mode. According to the invention, the offshore drilling platform is used for drilling the open hole well, the super-long gravity heat pipe is placed in the open hole well, one section of the super-long gravity heat pipe is arranged in the high-temperature lower coating, and the other section of the super-long gravity heat pipe is arranged in the hydrate reservoir or the ice-containing shallow layer, so that the working medium in the super-long gravity heat pipe is driven to circulate through the high temperature of the lower coating; the heat of the lower covering layer is continuously transmitted to the hydrate reservoir or the ice-containing shallow layer to be dissipated, so that the temperature of the hydrate reservoir or the ice-containing shallow layer is increased, the phase balance of the hydrate is broken, the hydrate is decomposed to produce gas, and the natural gas is transmitted to a natural gas collecting tank on the offshore drilling platform through the vertical well to be stored, so that the effect of exploiting the natural gas hydrate is achieved.

The invention discloses a method and device for determining an offshore drilling path and electronic equipment. The invention relates to the field of ocean engineering automation. The method comprises the following steps: creating a marine environment model; under the marine environment model, path information of multiple target drilling paths of the offshore drilling ship is determined by adopting multiple path planning algorithms with the purpose of minimizing the comprehensive cost as the target, the comprehensive cost is determined through multiple sub-costs and the preset weight corresponding to each sub-cost, and each sub-cost is determined according to the preset weight corresponding to each sub-cost; the multiple sub-costs comprise energy consumption cost, time cost and satisfaction cost, the satisfaction cost is determined according to satisfaction indexes, and the satisfaction indexes are at least used for quantifying the operation safety degree and the navigation comfort degree of offshore drilling conducted by the offshore drilling ship according to the drilling path; and outputting the path information of the plurality of target drilling paths. The technical problem that it is difficult to simulate complex changes of the ocean to plan the drilling path for the ship due to the fact that only a single index is concerned when the drilling path is determined is solved.

A method for wind-ship fluid-structure interaction (FSI) in a digital twin environment is proposed. This method establishes a wind-ship coupling force and moment calculation model within the constructed digital twin environment. Based on the ship's attitude attributes, the wind force and moment are calculated, and dynamic formulas are further applied to simulate changes in the ship's velocity and angular velocity, thus achieving FSI. This invention fully considers the spatiotemporal changes in the environment and the impact of changes in ship attitude. The surface of the ship model is decomposed into triangular facets for calculation, ensuring the realism of the simulation results. It is applicable to any type of offshore floating body, such as buoys, offshore drilling platforms, or offshore wind turbines, where wind and wave coupling is significant.

The invention provides an anticorrosive paint formula and process, and relates to the technical field of anticorrosive paints.The anticorrosive paint formula comprises epoxy zinc-rich primer, epoxy micaceous iron oxide intermediate paint and acrylic aliphatic polyurethane finish paint.The epoxy zinc-rich primer comprises epoxy resin, zinc powder, organobentonite, a dispersing agent and a solvent; the epoxy micaceous iron oxide intermediate paint takes epoxy resin and micaceous iron oxide gray as main anticorrosive fillers; and the finish paint is cross-linked and cured by adopting hydroxy acrylic resin and an HDI tripolymer curing agent. The coating shows super-long corrosion resistance and high natural weather aging resistance, the performance of the coating is far better than that of a traditional coating, and the coating is particularly suitable for offshore drilling platforms, ports and wharfs, petrochemical facilities, roads and bridges, stadium steel structures, electric power facilities and other facilities exposed in severe environments for a long time; the service life of facilities can be effectively prolonged, the maintenance period can be effectively shortened, and due to the excellent performance, the coating has a wide prospect in various engineering applications requiring high weather resistance and corrosion resistance.

A method of temporarily anchoring a mobile offshore drilling unit (MODU) at an offshore drilling site includes laying out anchoring assemblies at a sea floor. Each anchoring assembly has a connection unit adjacent to the drilling site, an anchor line extending away therefrom, and a sea floor anchor. The MODU is brought to the drilling site. Successively, for each connection unit, a dynamic positioning system at the MODU is operated to move the MODU to a position substantially vertically above the connection unit, a drilling unit anchor line having a connection member is lowered from the MODU to engage the connection unit, and the drilling unit anchor line is connected with the respective anchoring assembly via the connection unit and the connection member. Each drilling unit anchor line is tensioned from the MODU to anchor the MODU at the drilling site via the plurality of anchoring assemblies.