115 results about "Subsea" patented technology

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).

This invention discloses an underwater chemical dosing system, comprising a coagulation reaction tank, a baffle plate, an underwater image acquisition module, a metering and dosing unit, a housing, and an edge computing unit. The metering and dosing unit is located on one side of the coagulation reaction tank and has a chemical outlet connected to an inlet for adding chemicals into the coagulation reaction tank. The housing is located on one side of the coagulation reaction tank, and the edge computing unit is located within the housing. The edge computing unit is electrically connected between the metering and dosing unit and the underwater image acquisition module, enabling the edge computing unit to receive image data transmitted from the underwater image acquisition module. The edge computing unit calculates the dosage based on the image data and can transmit the dosage data to the metering and dosing unit. The metering and dosing unit can control the amount of chemicals added to the coagulation reaction tank based on the dosage data. This embodiment of the underwater chemical dosing system upgrades to feedback control based on real-time image data, improving dosing accuracy.

This invention relates to a subsea actuator with visual position indicators and associated methods for subsea energy infrastructure, such as in the oil and gas industry. The actuator may include a housing with a window, an actuation member, and a drive mechanism that moves the actuation member between at least two positions. The invention also relates to a method that involves providing a housing with a window, connecting the actuation member to a drive mechanism, and indicating the position of the actuation member through the window. This visual inspection can be performed directly or via a camera, even in the event of a power failure, using a passive, unpowered indicator. The indication can be displayed on an ROV panel, ensuring reliable remote monitoring and operation of the subsea actuator.

This invention provides a method and system for stress analysis of subsea tunnel support structures, relating to the field of subsea engineering technology. The method includes: acquiring and comparing the differences between exploration data of the first geological layer after excavation and exploration data of the second geological layer before initial shotcreting of the tunnel cross-section to obtain fissure anomaly increment data; obtaining a first gain factor and a second gain factor affecting the formation of the water pressure field based on the first hydrodynamic pressure data and the fissure anomaly increment data; and continuously optimizing and adjusting the cumulative support strength corresponding to the corresponding support sub-process and the geological layer anomaly increment data corresponding to the second geological layer exploration data based on the first gain factor, the second gain factor, and the second hydrodynamic pressure data corresponding to each support sub-process in the initial support, to complete the stress reliability analysis of the initial support structure. The method and system provided by this invention can effectively ensure the safety of tunnel support.

This invention provides a method for simulating buckling of subsea pipelines based on the pipeline element method, addressing the problems of low computational efficiency, complex modeling, and low accuracy in existing methods. Based on Euler-Bernoulli beam theory, this invention models the pipeline as a series of efficient pipeline elements. Internal pressure is converted into equivalent temperature rise, and the effective thermal expansion force generated by the effective temperature rise is applied to both ends of the pipeline element to construct the total potential energy equation. The second derivative of the total potential energy equation is performed to obtain the tangent stiffness matrix of the pipeline element. An updated Lagrange method is used for coordinate transformation. The secant relationship is used to calculate the pipeline element and soil resistance. A Newton-Raphson incremental-iterative numerical program is established to perform nonlinear analysis of the pipeline, progressively solving for the deformation and stress of the pipeline under complex loads. This invention significantly reduces the number of elements, improves computational efficiency, and accurately simulates nonlinear pipe-soil interactions. It is applicable to various pipelines, including short pipes, long pipes, and corroded pipes, as well as complex working conditions such as high temperature and high pressure.

The utility model discloses a kind of seabed pipeline connection sealing clamps of being convenient for fixed, including clamping body, the one side of the clamping body is fixedly connected with upside fixed plate and downside fixed plate, the surface of upside fixed plate and downside fixed plate is equipped with preliminary connection groove, the surface of preliminary connection groove is movably connected with preliminary positioning assembly, preliminary positioning assembly includes positioning box, the one side of the inner wall of positioning box is fixedly connected with isolating plate, the utility model relates to pipeline technical field.The seabed pipeline connection sealing clamps of being convenient for fixed, staff seals when clamping body, directly inserts preliminary positioning assembly into preliminary connection groove, can first limit upside fixed plate and downside fixed plate within certain range, then fast rotating clamping plate, can quickly connect upside fixed plate and downside fixed plate with fixed type, and the relevant structure of preliminary positioning assembly is very simple, and operation logic is clear and reliable.

The utility model discloses a ship submarine organism cleaning robot, including main body frame, mobile system, cleaning execution system, adsorption balance system and identification system. Mobile system is by multi -freedom degree mechanical leg and the constitution of the Mecanum wheel, realizes the omni -directional movement on complex surface. The cleaning execution system is by rough cleaning wheel and fine cleaning wheel composition, through the gear set and transmission chain synchronous drive, utilizes the speed difference and spring pressure adjusting assembly to realize grading high -efficient cleaning. Adsorption balance system is by electromagnet, counter -thrust rudder and compressed air bag constitute, and cooperatively provide stable adhesion and attitude control. The identification system includes camera, LED lamp and main control unit, can intelligent identification ship body attachment and dynamic adjustment cleaning strategy. The utility model can be stable operation in underwater complex environment, realizes the efficient, accurate cleaning of the attachment such as acorn barnacle, algae, improves the ship operation efficiency and prolongs the service life.

This invention discloses a method for handling subsea pipelines during uplift, comprising: Step S1, pipeline gas discharge and repositioning: When an abnormal uplift occurs in a laid subsea pipeline, the pipeline is pressurized to allow the gas inside to flow back to the onshore section and be discharged through the onshore section's exhaust valve, causing the pipeline to fall back to its initial installation elevation; Step S2, trench dredging and pipeline leveling: An underwater excavator is used to excavate along both sides of the pipeline to below the design elevation of the pipeline bottom, and simultaneously, a mud pump is used to pump the silt to a mud transport vessel, transport it to a designated anti-seepage treatment site, and check the dredging quality. If the pipeline is suspended, graded sand and gravel are used for leveling; Step S3, precast concrete cover plate fabrication; Step S4, underwater positioning and cover plate installation preparation; Step S5, precast concrete cover plate installation; Step S6, end sealing. When an abnormal uplift occurs in a laid subsea pipeline, this invention can suppress pipeline uplift and increase the pipeline's stability on the seabed.

The invention relates to a method and system for installing a load-bearing element in a seabed, a method and system for installing a subsea anchor on a seabed, a subsea pile and a subsea anchor.

A mooring line (200) comprising a first section (210) for being in an inverse catenary shape under the seabed (20) when installed is disclosed. The mooring line (200) comprises one or more plates (300) connected to the first section (210) of the mooring line (200), the one or more plates (300) comprise a surface area (310) configured for providing a resisting force in a direction perpendicular to the mooring line (200) for keeping the first section (210) in the inverse catenary shape when axial pulling force is applied to the mooring line. A mooring system for an offshore structure (10) is disclosed. The system comprises an anchor member (100) at least partly embedded in the seabed (20) and the mooring line (200). The mooring line (200) further comprises a second section (220) for being subsea, the mooring line (200) extending from the offshore structure (10) to a part of the anchor member (100) embedded in the seabed (20), wherein the one or more plates (300) are connected under the seabed to the first section (210) of the mooring line (200) and are configured to keep the mooring line (200) in an inverse catenary shape.

A subsea (underwater) camera system 100 for imaging in subsea environments. The camera system comprises a body with a first tubular casing 11, a second tubular casing 66, and a longitudinal strut 34 w

A subsea anchor pile comprises: upper and lower parts joined end-to-end; a pile chain disposed within and extending along the upper part; and a support that holds an upper end of the pile chain accessible for connection from outside the anchor pile. The support is a buoyancy module attached to the pile chain, an upper support that engages the pile chain, and / or a matrix that embeds the pile chain in a frangible body or a particulate mass. A subsea foundation is installed by: supporting the pile chain upright within the anchor pile to allow access from the seabed for connection to the upper end of the pile chain; connecting a chain of a mooring line to the upper end of the pile chain; and pulling the mooring line to pull the pile chain laterally away from or out of the anchor pile and into engagement with the adjacent seabed soil.

A system for tethering a subsea structure includes an anchor embedded in the sea bed, a mud mat disposed partially above the seafloor, a link attached to the anchor and to the mud mat, and a flexible tension member. One end of the flexible tension member is coupled to a tensioning system configured to pay in and pay out the flexible tension member. The tensioning system is mounted on one of the subsea structure or on the mud mat. The other end of the flexible tension member is coupled to the other of the subsea structure or on the mud mat. The anchor may optionally be buried below the seafloor.

This invention provides a method for cleaning ultra-deepwater long-distance gas-liquid mixed transport subsea pipelines, belonging to the field of marine oil and gas engineering and flow safety assurance technology. The method includes the following steps: accurate data analysis and operational condition simulation; calculation of the minimum ethylene glycol injection volume required for each stage; prediction of the maximum slug flow rate and its impact on the platform separator and trap; determination of the specific duration, gas volume control range, and gas source switching node for each cleaning stage based on the simulation results, while developing an emergency plan; sequential execution of the four stages: production gas carrying liquid stage, recirculating gas purging and carrying liquid stage, recirculating gas cleaning stage, and production gas cleaning stage; and depressurization via a balancing valve, removal of the cleaning tool, and product analysis. This invention achieves controllable risks, reduced time, and minimized production loss in pipeline cleaning operations through a multi-stage gas source switching strategy, integrated real-time online simulation and early warning technology, and optimized slug flow control and ball launch / receiver procedures.

An enclosure (10) for a subsea control and power arrangement (12), the enclosure (10) comprises: a cannister (14) and a lid (16), a connector assembly (20), a first volume compensator (22) and a second volume compensator (30). The cannister (14) and the lid (16) form an enclosure volume (18). The first volume compensator (22) having a first chamber (23), the first volume compensator (22) is mounted to the enclosure (10) outside the enclosure volume (18). The first chamber (23) has a variable volume. The second volume compensator (30) having a second chamber (31). The second chamber (31) has a variable volume. The connector assembly (20) extends through the lid (16) and into the enclosure volume (18) and comprises a housing (24) forming a third chamber (26) and a connector part (28). The connector part (28) is mounted at least partly within the housing (24) and the housing (24) is located at least partly within the enclosure volume (18), the connector part (28) extends through the housing (24) and into the enclosure volume (18). The first chamber (23), the second chamber (31) and the third chamber (26) are liquidly connected to one another to form a compensator volume (23, 31, 26). The compensator volume (23, 31, 26) is arranged, in liquid flow order, between the enclosure volume (18) and ambient (54) the enclosure (10) thereby forming at least two sealing barriers between ambient (54) and the enclosure volume (18).

METHOD FOR COMPLETING OIL WELLS IN PRE-SALIFEROUS CARBONATE FORMATIONS WITH EARLY INJECTIVITY INDUCTION The present invention relates to a method for completing oil wells with early injectivity induction, promoting the elimination of drilling damage in a step prior to the installation of the production column and the subsea Christmas tree and without the need to use spiral tubing, by obtaining sufficient, but not excessive, initial injectivity, such that subsequent acid treatment can reach the formation without risk of fracturing, reducing the operating time and the risks associated with the use of this equipment.

This invention relates to a locking device for the connection between a reel and the end of a pipe in the roll-type laying of subsea pipelines. An annular groove is formed at the connection between the spherical and conical shapes of the initial end. A central hole and a conical hole are sequentially arranged along the pipe's axial direction from front to back inside the initial end. After a conical fixing block is welded to the end of the axial pulling cable, the axial pulling cable is passed through the central hole of the initial end, causing the conical fixing block to engage with the conical hole inside the initial end. Left and right clamps are located on opposite sides of the initial end and are engaged with the annular groove of the initial end, with the left and right clamps being securely connected. A fixing arm is connected to the end of the right clamp, and a fixing disc is securely connected to the end of the fixing arm. A lifting ring is connected to the end face of the fixing arm. This invention enables the connection and fixation of the pipe end to the reel during the roll-up process, ensuring a firm fixation, convenient operation, and facilitating subsea pipeline laying operations, thus improving work efficiency.

This application discloses an adaptive seabed topography subsea pipeline stabilization installation device using a bottom-towing method, belonging to the field of marine engineering. The device includes a pipeline and a connecting cable positioned above the pipeline. Several straps connected to the connecting cable are evenly spaced along the length of the pipeline. The straps are connected to the pipeline using a "double-loop cross-wrap" method, meaning they are wrapped circumferentially around the pipeline and then cross axially to form an "X" shape constraint. A pad is placed between the straps and the pipeline, with a diamond-patterned surface. Locking devices are provided on the straps to secure them to the pipeline. The pad, positioned between the straps and the pipeline, plays a crucial protective role, completely preventing direct contact between the straps and the pipeline. This effectively prevents the straps from damaging the pipeline's anti-corrosion layer due to friction during long-term use, greatly extending the pipeline's service life, reducing maintenance costs, and ensuring the long-term stable operation of the subsea pipeline project.

The application provides a two-stage multiphase separation reinjection system for an underwater oil and gas well, which comprises a first-stage pre-separation device, a second-stage multiphase deposition separation device and a reinjection assembly. The first-stage pre-separation device comprises a gas-liquid preliminary separation module and an oil-water preliminary separation module, which can be selected and used according to the underwater space and the flow characteristics, so as to realize the preliminary separation and impact buffering of the flow. The second-stage multiphase deposition separation device is provided with an oil-water separation chamber and an oil-gas chamber, and is communicated through an overflow device, and respectively receives the oil-water phase and the oil-gas after the first-stage separation, and carries out deep separation. The reinjection assembly comprises a sand removal device and a water injection assembly, which is used for discharging the separated water to the sea or reinjecting the formation after sand removal. The system can adapt to complex working conditions, reduce the volume and wall thickness of the second-stage device, save the construction cost; at the same time, the formation pressure is maintained and the recovery rate is improved through reinjection, and the number of submarine pipelines is reduced by adopting oil-gas mixed transportation, so that the underwater production is realized in an economical and efficient manner.

This invention discloses a method and system for identifying and reconstructing suspended spans of subsea pipelines based on distributed fiber optic strain sensing, belonging to the field of subsea pipeline integrity management and structural health monitoring technology. The invention deploys distributed fiber optic strain sensors longitudinally along the monitored pipeline segment, dispersing them circumferentially to form measurement positions, thereby separating strain and determining the principal bending plane and curvature. The curvature energy ratio extrapolation is used as the convergence criterion to determine the boundary of the suspended span influence region. A simply supported conjugate beam model is established within the suspended span influence region to obtain the foundation displacement field and rotation field reflecting the elastic deformation of the suspended span. Addressing the limitation of the conjugate beam method in reconstructing the rigid body displacement effect generated by pipe-soil interaction, a zero-curvature rigid body follow-up displacement correction method is proposed. This method compensates for the missing rigid body displacement components in the real displacement field by constructing a piecewise linear correction term. This invention overcomes the difficulty of conventional numerical reconstruction relying on ideal boundaries and improves the computational accuracy of spatial displacement field reconstruction.

This invention belongs to the technical field of subsea pipeline structure stress and in-situ stability. It discloses a model pipeline system capable of accurately measuring the stress on subsea pipelines. The system has a symmetrical structure and includes a model pipeline body, end support structures, a two-dimensional total force sensor measurement assembly, a dynamic pressure measurement sensor, a maintenance window for the model pipeline system, fixed tie rods, and a pressure sensor mounting body. The pressure sensor mounting body is located between the two model pipeline bodies. This invention can highly integrate various sensors into the same model pipeline testing system, greatly improving experimental testing efficiency. Furthermore, this invention enables simultaneous measurement of the hydrodynamic forces and soil resistance experienced by the model pipeline, making research on the in-situ stability of subsea pipelines a practical possibility.

A subsea foundation exemplified by a monopile or a suction pile comprises an embeddable body that extends along an upright embedment axis. A plurality of fins extend outwardly from the body in directions transverse to the embedment axis. At least some fins of the plurality are at least partially embedded in seabed soil. The plurality of fins is divided into an upper array of upper fins and a lower array of lower fins. The arrays may be spaced apart or overlap along the embedment axis, and may be angularly aligned or angularly offset with respect to each other about that axis.

The disclosure relates to a computer-implemented method for optimizing a layout of a subsea oil & gas field on a portion of the seabed, comprising providing input specifying locations unsuitable for well location and injection or production targets, determining optimal locations each of an injection well or of a production well by optimizing a well location and trajectory, determining optimal locations by performing an optimization that rewards every well is connected to exactly one drill center and the overall drilled length and number of drill centers is minimized, determining a location and orientation for the surface facility or processing facility based on metocean data, marine regulation constraints and the determined locations each of a drill center. The method also comprises determining a layout of flowlines by performing an optimization process including iterations of computing a solution to the optimization and defining mechanical constraints on the flowlines to find another solution.

An apparatus 200 for controlling a subsea blowout preventor (BOP) includes a control system for controlling a subsea BOP of a subsea stack assembly installed over a subsea oil and gas well. The contro

The present application relates to offshore platform construction foundation technical field, specifically to a kind of seabed data center main structure and its construction method, main structure includes from top to bottom and closes upper block, data warehouse and jacket.The construction method is to separate jacket into horizontal base, three-dimensional assembly frame and column leg pipe and make separately.Data warehouse is divided into five sections, four sections are sequentially stacked into the installation position of double-spliced H-shaped steel structure in horizontal base, and the topmost section is installed and welded at the bottom of upper block.Upper block is divided into upper deck, lower deck and middle deck, respectively made and installed and welded, lower deck carries a data warehouse section, and the entire upper block is reserved installation point and finally inserted into column leg pipe.Finally, align upper block with three-dimensional assembly frame and column leg pipe, bottom data warehouse section and data warehouse section on horizontal base are closed, and the overall structure is built.The present application is built in modularization, reduces tooling usage, shortens construction time and saves cost.

This invention relates to the interdisciplinary field of 3D printing technology and marine engineering construction, and discloses a 3D printing material, device, and method for underwater sealed caverns in marine environments. The printing material includes water-based adhesive, sand-based adhesive, cementitious materials, steel fibers, and additives, and also includes a printer frame, a power drive module, a pumping system, and an extrusion system. After the lower concrete strip is formed, the hydrogel protective layer effectively isolates seawater. When the upper concrete layer is printed, the upper concrete exerts pressure on the interlayer hydrogel under its own weight. Due to the flexible and crushable properties of the hydrogel, it will rupture under pressure, allowing the upper and lower concrete layers to come into direct contact. At this time, the surface of the lower concrete still maintains a certain degree of activity. The hydration reactions of the upper and lower concrete layers form a continuous synergy, promoting the interweaving and fusion of hydration products at the interface, forming a tight interfacial bond, and eliminating interlayer gaps.