586 results about "Subsea" patented technology

The invention discloses a corrosion-resistant offshore wind power FRP-steel composite tower tube structure multi-objective optimization design method. The method comprises the following steps that a composite tower tube structure in an outer layer GFRP-steel tube-inner layer GFRP composite section form is adopted below the sea level and in a splash zone; mapping the coupling load time history to a parameterized finite element model of the composite tower tube structure; constructing a multi-objective optimization function by taking the minimization of the total manufacturing cost of the composite tower drum structure, the minimization of the total mass of the composite tower drum structure and the maximization of the total volume proportion of the GFRP material of the composite tower drum structure as objectives; and establishing a constraint evaluation system, carrying out iterative optimization on the multi-objective function by adopting a fast non-dominated sorting genetic algorithm with an elitist retention strategy, outputting a Pareto optimal solution set, and selecting a final implementation scheme. The problems that a traditional pure steel tower drum is large in corrosion loss and the design is difficult to balance multiple performance targets in the severe ocean environment can be solved.

Disclosed are a device and method for rapidly regulating downhole pressure after a kick in deepwater shallow open-circuit drilling. The device includes a real-time monitoring device and a real-time regulation device. Aiming at deepwater shallow open-circuit drilling characteristics, the present disclosure proposes that a drilling fluid return condition at a seabed is monitored through a subsea remote operated vehicle (ROV); based on this data, whether gas influx occurs in a downhole or not and changes of the gas influx rate and the formation pressure after the gas influx are analyzed in real time, and then real-time guidance is provided for the design of key parameters such as well killing fluid displacement and density, and the well killing fluid displacement and density are regulated in real time, to achieve rapid regulation of the downhole pressure after gas influx of deepwater shallow open-circuit drilling.

The invention discloses a simulation platform for autonomous tracking of a subsea pipeline by a UUV. The simulation platform comprises a mother ship command and control node system used for issuing a task instruction to a UUV motion control and situation display system; the UUV motion control and situation display system is used for sending a course adjustment instruction to the UUV underwater unmanned vehicle and carrying out real-time graphical dynamic display on the navigation information of the UUV underwater unmanned vehicle; the UUV side-scan sonar model system is used for receiving the motion attitude information of the UUV underwater unmanned vehicle and carrying out detection result data production calculation on a target area in combination with the motion attitude information; the UUV subsea pipeline detection and identification system is used for carrying out pipeline identification according to side scanning detection result data and sending pipeline information to the UUV pipeline tracking strategy system; the UUV pipeline tracking strategy system is used for calculating the track information of the UUV underwater unmanned vehicle according to the pipeline information and the navigation information of the UUV underwater unmanned vehicle, and sending the track information to the mother ship command control node system.

The invention relates to the technical field of a seabed substrate advanced detection device and method for a seabed mining vehicle, and provides a seabed substrate advanced detection device and method for a seabed mining vehicle, which can simultaneously obtain submarine topography and landform and detect multiple parameters of a seabed substrate. The deep sea detection system is matched with a mine car to ensure smooth proceeding of a rear mine car in deep sea bottom detection, and comprises a sea surface data processing system and a frame with the cross section in a structure shaped like a Chinese character'tian ', a master control device, a signal receiver and at least four detection modules arranged in a matrix are arranged on the frame, and the master control device is used for controlling the detection modules. The signal receiver is used for transmitting information of the detection module and the sea surface receiving device; the detection module comprises a side-scan sonar module used for rapidly obtaining the topography and landform in front, a transverse push toothed plate used for cutting into a soil body, a turbidity meter module used for measuring the concentration of suspended particles and dissolved matters in the seabed, and a pressing plate module used for obtaining the bearing capacity and the subsidence index of the seabed sediment.

The invention discloses a shallow sea area water depth inversion method based on a satellite-borne laser radar, and particularly relates to the technical field of single-photon water depth information extraction. The denoising method comprises the following steps: S1, data preprocessing: reading data, carrying out visual presentation, dividing photons into offshore photons, sea surface photons and undersea photons, and intercepting an effective photon region; s2, coarse denoising: denoising the area intercepted in the step S1 by adopting a DBSCAN (Density Based Spatial Clustering of Applications with Noise) algorithm; s3, fine denoising: screening effective signals of sea surface photons by adopting a Gaussian fitting algorithm, removing sea photons, separating subsea photons from the sea surface photons, performing density analysis on the subsea photons, extracting a density peak point, and constructing a density trend curve of the subsea photons by adopting a cubic spline interpolation method, eliminating residual noise deviating from normal distribution according to the trend curve; and S4, performing water depth inversion: performing refraction correction on the subsea photons subjected to fine denoising, fusing the corrected subsea photons and the sea surface photons subjected to fine denoising, and generating a water depth distribution diagram of the shallow sea area.

A floating power-generation group comprises a floating hub such as a spar buoy that is anchored to subsea foundations by anchor lines. Floating power producer units such as wind turbines are connected electrically and mechanically to the hub. The power producer units are each moored by mooring lines. At least one mooring line extends inwardly toward the hub to effect mechanical connection to the hub and at least one other mooring line extends outwardly toward a subsea foundation. The groups are combined as a set whose hubs are connected electrically to each other via subsea energy storage units. Anchor lines of different groups can share subsea foundations. The storage units comprise pumping machinery to expel water from an elongate storage volume and generating machinery to generate electricity from a flow of water entering the storage volume. The pumping machinery can be in deeper water than the generating machinery.

Provided are an intelligent operation and maintenance optimization method and intelligent production optimization method for an offshore oil subsea production system (SPS), and a system, relating to the field of petroleum engineering. The operation and maintenance optimization method includes: determining whether there is a leak in an SPS; and if there is a leak, performing emergency repair; or if there is no leak, performing intelligent operation and maintenance optimization. The performing intelligent operation and maintenance optimization includes: calculating a static health index of the SPS based on ashore sensor status data and Christmas tree sensor data; obtaining dynamic health indexes at different moments through a Kalman filtering algorithm; and formulating an optimal maintenance strategy for the SPS with optimization objectives of maximizing toughness and minimizing a maintenance cost.

The angle-adjustable underwater well mouth comprises a high-pressure well mouth, a low-pressure well mouth and a low-pressure well mouth extension sleeve, the high-pressure well mouth and the low-pressure well mouth are positioned and adjusted in direction through a first well mouth spherical pair, and the high-pressure well mouth and the low-pressure well mouth are locked through a locking ring; in the tie-back operation mode, a high-pressure well mouth is connected with a flexible insertion sealing pipe through a high-pressure well mouth thin-wall extension sleeve, a tie-back tail pipe hanger is arranged in a low-pressure well mouth extension sleeve, a guide cylinder is arranged at the upper end of the tie-back tail pipe hanger, and a guide head is arranged at the lower end of the flexible insertion sealing pipe. The flexible insertion sealing pipe can enter the tie-back tail pipe hanger under the guiding action of the guiding head and the guiding cylinder; in the non-tie-back operation mode, the common extension sleeve is connected below the high-pressure wellhead, and the sleeve string is connected below the common extension sleeve. The inclined high-pressure wellhead is adjusted to be approximately vertical as required, so that a service tool, a blowout preventer and a Christmas tree are convenient to mount, the stability of the wellhead is enhanced, and the operation risk is reduced.

The invention belongs to the technical field of offshore petrochemical engineering, and particularly relates to a collaborative optimization method for service life and oil and gas yield of an offshore oil underwater production system. The invention provides an offshore oil subsea production system life and oil and gas yield collaborative optimization method, and the method achieves the real-time collaborative optimization control based on life perception through the comprehensive evaluation of the equipment health state and the yield dynamic state. Besides, a steady-state operation and control switching mechanism is further configured, safe transition of the system can still be guaranteed when the health state of the offshore oil underwater production system is deteriorated or operation disturbance occurs, and reliable technical support is provided for improving the control precision and operation toughness of the system. The collaborative optimization method for the service life and the oil and gas yield of the offshore oil subsea production system comprises the following steps: evaluating the health state of the offshore oil subsea production system; predicting the oil and gas yield; carrying out collaborative optimization on the service life and the oil and gas yield of the offshore oil underwater production system; and formulating a steady-state real-time control strategy.

The invention provides a submarine pipeline corrosion rate prediction method, system and device and a medium, and the method comprises the steps: obtaining monitoring data along a target submarine pipeline and pipeline body data; constructing a microbial corrosion random kinetic model based on the monitoring data, and simulating and generating a random microbial corrosion current component; calculating a pipe wall temperature field which is non-uniformly distributed along the axial direction of the pipeline based on the monitoring data and the pipeline body data; calculating an electrochemical corrosion current component based on the pipe wall temperature field and the electrochemical parameters of the pipeline material; performing multi-physics field coupling calculation on the random microbial corrosion current component and the electrochemical corrosion current component to generate a corrosion space-time distribution field; and performing corrosion risk analysis based on the corrosion space-time distribution field to obtain a corrosion risk prediction result. The method can improve the corrosion prediction accuracy of the submarine pipeline.

The utility model relates to a telescopic seabed emergency repair adapter of a bending limiter, which comprises a first joint, a second joint, a first telescopic cylinder and a second telescopic cylinder, a telescopic structure is arranged between the first telescopic cylinder and the second telescopic cylinder, and the first telescopic cylinder and the second telescopic cylinder are telescopically lapped together. The telescopic structure enables the length of the first telescopic cylinder and the second telescopic cylinder which are lapped together to change; the first connector and the second connector are the same in structure, the first connector is assembled at one end of the first telescopic cylinder, and the second connector is assembled at one end of the second telescopic cylinder. The telescopic seabed first-aid repair adapter of the bending limiter is simple in structure, easy to operate, high in stability and high in adaptability due to the fact that the telescopic length is variable, and when first-aid repair personnel conduct seabed first-aid repair, operation is easy and convenient, consumed time is short, and safety and reliability are achieved.

The invention proposes a double barrier pressure compensator for performing a pressure compensation between seawater surrounding a subsea installation and a medium filling a volume of the subsea installation. Said pressure compensator comprises: —a housing (20) having a first opening (202b) and a second opening (30); —a first bellows (4) and a second bellows (5) arranged one above the other within the housing (20) and each sealingly fixed to the housing (20) at their distal ends (43, 53); —a moving separation element (6) adapted to move inside the housing (20) and sealingly fixed to each of the proximal ends (44, 54) of the first and second bellows (4, 5) so as to separate a first compartment (21) from a second compartment (22) of the housing (20) sealed with respect to each other. Said pressure compensator (2) further comprising a third compartment (23) formed by a space between the housing (20) and the first and second bellows (4, 5), the first compartment (21) being arranged to be fluidly connected to the subsea installation (1) through the second opening (30), the second compartment (22) being arranged to be in communication with sea water through the first opening (202b), and said third compartment (23) being filled with a barrier medium.

The invention relates to the technical field of soil engineering model tests, and discloses a test system and method for simulating water and mud bursting of a subsea tunnel under the action of vibration, and the system comprises a multi-degree-of-freedom servo feedback vibration module which is used for providing a multidirectional vibration loading platform and feeding back a motor current signal in real time; the visual rock-soil water inrush simulation and multi-field loading module is mounted above the vibration table and is used for accommodating a sample and applying confining pressure and water pressure load; the hierarchical multi-source data acquisition module is communicated with the discharge port and the observation window, and is used for acquiring the outburst mixture and monitoring physical field data; and the intelligent control and risk assessment analysis module is connected with each module to regulate and control loading parameters and invert a catastrophe state based on feedback data. According to the method, a self-adaptive optimization loading mechanism based on the improved particle swarm optimization algorithm is constructed, so that collaborative progressive regulation and control of pore water pressure and vibration frequency parameters are realized, and a critical threshold point of water inrush and mud inrush catastrophe can be accurately captured.

The subject matter of this specification can be embodied in, among other things, a subsea energy recovery system for generating electric power that includes an inlet flow line configured to couple to a subsea tree of a subsea gas well to receive gas produced from the subsea gas well, and a subsea electric power generation system, the subsea electric power generation system configured to reside subsea on a subsea production site of the subsea gas well and including a turbine wheel configured to rotate in response to expansion of the gas, a rotor configured to rotate with the turbine wheel, a stationary electric stator, the rotor and electric stator defining an electric generator configured to generate current, and a hermetically sealed housing enclosing the turbine wheel, the rotor, and the electric stator and hermetically sealed inline in the first flow line.

The invention belongs to the technical field of seabed exploration, and particularly relates to an anti-sloughing hole seabed drilling sampling device suitable for loose sediments, which comprises a suspension platform, a double-pipe isolation sampling assembly and a loading assembly, a group of brackets are uniformly distributed on the surface of the suspension platform; the double-pipe isolation sampling assembly comprises a supporting pipe on the outer layer and a sampling pipe on the inner layer; a group of guide rods are uniformly distributed at the top of the supporting pipe; the guide rod penetrates through the suspension platform and is in sliding connection with the suspension platform; the upper end of the guide rod is fixedly connected with a stress plate; the stress plate is hammered intermittently through the loading assembly, the supporting pipe is promoted to be inserted into the seabed sediment, then the supporting pipe can play a role in supporting and enclosing the surrounding sediment, the hole collapse phenomenon in the sampling process is prevented, then the sediment in the supporting pipe is collected layer by layer through the sampling pipe, stratified sampling operation is achieved, and the sampling efficiency is improved. And disturbance to the sediments in the supporting pipe can be reduced to the greatest extent in the operation process, so that an almost original sediment sample can be obtained.

The invention discloses a toughness-driven underwater production system on-condition maintenance decision optimization method and system, and belongs to the field of underwater production system maintenance decision, and the method comprises the steps: predicting the remaining service life of a system, modeling the natural degradation performance of a component based on Weibull distribution, and quantifying the random impact degradation amount by combining a Poisson-normal impact model; performing superposition calculation on the total degradation performance of the system and predicting the remaining service life; predicting oil and gas yield, and fitting historical yield data by adopting an I-type generalized mathematical model; performing real-time toughness evaluation, fusing technical indexes and economic indexes, and calculating a comprehensive toughness value through a performance retention function and a yield stability function; and maintenance decision optimization: taking the real-time toughness value as an input variable, establishing a dual-objective decision model for maximizing the system toughness and minimizing the maintenance cost, and solving an optimal maintenance trigger threshold by adopting a multi-objective optimization algorithm, the maintenance decision is driven through the toughness index, and the reliability and economical efficiency of the underwater production system are effectively improved.

The present invention relates to a subsea storage system for storing a water miscible storage fluid and methods related thereto.

The utility model provides a submarine cable armored structure anchoring device which comprises a protective sleeve, an armored structure is arranged in the protective sleeve, one end of the protective sleeve is sealed through a grouting cover plate, the other end of the protective sleeve is connected with an anti-bending pipe through a connecting flange, and through holes for a submarine cable to penetrate through are formed in the anti-bending pipe and the protective sleeve. The protective sleeve comprises two protective covers which are symmetrically arranged, one sides of the two protective covers are connected through a hinge, the other sides of the two protective covers are fixed through bolts, and the split type protective sleeve is adopted, so that installation, disassembly and maintenance are convenient; an anti-bending pipe is arranged, so that the submarine cable is prevented from being excessively bent under a relatively large bending moment, and the service life of the submarine cable is prolonged; the protective sleeve and the anti-bending pipe are connected through the connecting flange, so that the overall sealing performance is improved; and the epoxy binder is poured into the protective sleeve, so that the sealing performance of the submarine cable armoring anchoring device is enhanced, seawater is effectively prevented from entering the conical protective cover to corrode the first armoring steel wire layer and the second armoring steel wire layer, and the durability of the submarine cable is improved.

A system is for remotely controlling a running tool to install equipment in a subsea well through a subsea structure. The system has a control device for controlling the running tool and a communication module for wirelessly communicating with the control device. The control device and the communication module include wireless communication interfaces for communicating subsea with each other through the subsea structure when the control device is provided internally to the subsea structure and the communication module is provided externally to the subsea structure. The memory of the control device is configured with state identifiers for representing internal states of the running tool and programs associated with operations for controlling the running tool. The control device is configured to receive commands from the communication module, execute the programs based on the command, and return a state identifier for representing a current internal state of the running tool.

The present invention relates to a subsea umbilical composite tube for use in subsea umbilical system such as the transportation of fluids such as hydraulic, chemical injection fluids and gas, and a method of manufacture thereof. In particular, a subsea umbilical composite tube comprising at least a thermoplastic liner, a composite reinforcement layer, and a thermoplastic cover.

The invention provides a dynamic monitoring system and method for a submarine optical cable array reservoir, which is applied to the technical field of marine geophysical prospecting, and comprises a wet-end subsystem positioned underwater and a dry-end subsystem positioned on a base bank, the dry end subsystem comprises a light source module used for generating an optical signal; the modulation transmitting module is used for modulating the optical signal to obtain modulated pulse light; the underwater wet end subsystem comprises an optical cable transmission module used for transmitting modulation pulse light; the optical fiber four-component node module is used for dynamically and continuously monitoring the reservoir for a long time, and modulating the acquired sound pressure signal and the triaxial vibration signal onto the modulated pulse light in response to the received modulated pulse light to form a return light signal; the dry end subsystem further comprises a modulation-demodulation module used for receiving the return optical signal and demodulating the return optical signal to obtain four-component monitoring data. According to the invention, sound pressure and three-axis vibration response can be integrated on the same node, and passive four-component synchronous acquisition is realized.

This disclosure presents an embodiment of a power supply device for a submarine data center. One specific embodiment of the power supply device includes a pre-stage voltage regulator / conversion component, a post-stage DC-DC converter component, and a combined protection circuit. The pre-stage voltage regulator / conversion component includes several parallel single-group voltage regulator branches, each branch connected in series with a varistor and a color-coded resistor. A thin-film capacitor is connected in parallel to the output terminal of the pre-stage voltage regulator / conversion component. The post-stage DC-DC converter component, electrically connected to the pre-stage voltage regulator / conversion component, includes at least two sets of full-bridge DC synchronous rectifier circuits. The combined protection circuit includes a pre-stage combined protection circuit, a post-stage active voltage clamping circuit connected in parallel to the output side of the post-stage DC-DC converter component, and a rectifier diode bridge connected between the constant current input port and the pre-stage voltage regulator / conversion component. The pre-stage combined protection circuit is connected in series to the input side of the rectifier diode bridge. By connecting multiple voltage regulator branches in parallel and combining them with the combined protection circuit, ripple is reduced. This embodiment can improve the power supply stability of the power supply device.

The subsea unit comprises a first member (110) and a second member (120), the two members (110, 120) being separate members, and an inner chamber (300) is formed between the first member and the second member when the first member (110) and the second member (120) are joined. A fastener (200) holds the first member (110) and the second member (120) together, the fastener (200) comprising a head (210) and a cylindrical body (230) connected to the head (210) at an axial end of the body, the body (230) comprising a threaded portion. A sealing element (220) is arranged between the head (210) and the first member (110), wherein the sealing element (220) engages both the first member (110) and the head (210) directly, and the sealing element (220) surrounds the body (230); wherein at least one sealing member (130) is arranged between the first member (110) and the second member (120) to seal the body (230) together with the sealing element (220).

The invention discloses a cross-fault-zone subsea tunnel structure non-uniform deformation identification and positioning method, which comprises the following steps: firstly, acquiring cross-fault-zone subsea tunnel BOTDA strain data, and respectively carrying out abnormal value processing, fitting and tidal residual strain separation on the strain data to obtain strain data with fault zone spatial characteristics; secondly, the strain data of the fault zone and the adjacent non-fault zone are clustered based on a Gaussian mixture model, a clustering strain mean value is extracted, and a strain mean value difference feature vector is constructed; a PSO algorithm is adopted to optimize an RF model to recognize a strain mean value difference time-varying curve, an LDSA algorithm is adopted to generate a high-resolution three-dimensional feature thermodynamic diagram for a non-uniform deformation region, and therefore the non-uniform deformation region is accurately positioned. According to the method, solid data support can be provided for identification, evaluation and disposal of uneven deformation of the tunnel structure, so that a more scientific management and maintenance decision is made, and subway operation safety is effectively guaranteed.

The utility model discloses a corrosion-resistant heavy hexagon nut for submarine oil drilling and production equipment, which comprises a nut body, a first rubber sleeve is arranged on the nut body, an extrusion plate is mounted below the nut body, a mounting groove is formed in the extrusion plate, a second rubber sleeve is mounted in the mounting groove, and the extrusion plate is arranged at the bottom end of the nut body through a sliding assembly. A protective sleeve is arranged on the outer side of the nut body, a guide assembly is arranged on the protective sleeve, and a locking assembly is arranged on the guide assembly. According to the corrosion-resistant heavy hexagon nut for the submarine oil drilling and production equipment, through the design of the first rubber sleeve, the second rubber sleeve and the protective sleeve, an additional protective layer can be provided for the nut body in a humid or corrosive environment, the corrosion risk is reduced, and the service life of the nut body is prolonged. And the rubber ring at the bottom end of the protective sleeve improves the sealing performance between the protective sleeve and the extrusion plate, the connection reliability is improved, and the stability and safety of the nut in a severe environment are ensured.

The invention provides a multifunctional flexible hose land dock pilot test platform, and belongs to the field of old or internally-corroded submarine pipeline repair. The pilot plant experiment platform is used for verifying the technology of penetrating and repairing the subsea pipeline in the RTP pipe or the technology of repairing the subsea pipeline by a lining; the pilot test platform comprises a test pipeline built in a land dock and a winch arranged at one end of the test pipeline, the test pipeline is designed according to the length, width and depth of the land dock and actual conditions of a later test after a route of a simulation test pipe section is designed by taking a route and an elbow of a target pipeline as reference; and the simulation test pipeline is constructed by connecting a plurality of pipelines and elbows. According to the invention, the feasibility of a novel submarine pipeline repair technology can be verified, and reference is provided for offshore site construction.

Techniques for identifying and locating a fault within a subsea hydrocarbon extraction system include receiving, via a main channel line and from a first subsea modem, first data associated with a first subsea control module, wherein the main channel line is communicatively coupled to the first subsea modem via a first channel leg line, receiving, via the main channel line and from a second subsea modem, second data associated with a second subsea control module, wherein the main channel line is communicatively coupled to the second subsea modem via a second channel leg line, identifying a fault or a developing fault in the first channel leg line based on an analysis of the first data and the second data, and generating and transmitting a notification indicating the fault or the developing fault in the first channel leg line.

An offshore wind farm includes at least four floating structures designed to receive a wind turbine, with each floating structure having at least three mooring lines, and each mooring line is attached to a mooring point arranged around said floating structure. The mooring lines facing inward from the offshore wind farm form the inner mooring lines of the offshore wind farm and the mooring lines facing outward from the offshore wind farm form the peripheral mooring lines of the offshore wind farm, wherein two adjacent floating structures have at least one of their peripheral mooring lines crossing each other, with at least one of these peripheral mooring lines comprising a buoyancy element.

A method of establishing a fluid connection in a subsea petroleum production system, the method comprising: positioning a first subsea fluid handling component (4,11-17,28) having a first connector (4a, 11a, 12a, 12b,29) adjacent a second subsea fluid handling component (4,11-17,28) having a second connector (4a, 11a, 12a, 12b,29), the first and / or second connectors (4a, 11a, 12a, 12b,29) having a breakable plug (20) sealingly arranged therein; operating an actuator to make up a connection between the first and second connectors (4a, 11a, 12a, 12b,29) while the breakable plug (20) is intact; shattering the plug (20) such as to open for fluid connection between the first and second subsea fluid handling components (4,11-17,28). There is also provided a subsea pipe (11,12,13) for arrangement on a sea floor (2) or on a subsea structure (4,14-17), having a breakable plug (20) sealingly arranged in an end connector (11a,12a, 12b) forming strengthened end parts of the pipe (11,12,13).

A scour protection unit comprises a barrier that is deployable over seabed soil beside a marine structure such as a pile. The barrier comprises a group of elongate arms that are pivotable relative to each other and flexible webs that interconnect neighbouring arms of the group. Concretion of at least one of the webs is promoted after deployment of the arms. Base arms are pivotably supported by a hub and base webs connect pairs of neighbouring base arms. The group of elongate arms further comprises an upright pillar arm, with an upright web extending between the pillar arm and one of the base arms to form an anti-scour vane. The base arms are pivotable downwardly and outwardly relative to the hub from a retracted state into a deployed state to form a base panel. In the base panel, the neighbouring base arms are splayed apart and the base webs extend between them to cover the seabed soil. Deployment of the base arms can also deploy the upright web.