220 results about "Single point mooring" patented technology

Apparatus is described for mooring a floating vessel (10) particularly suited to a tanker transporting liquid natural gas which needs to be moored in an offshore environment. The apparatus comprises a semi-submersible floating dock (1) a single point mooring system (5) and at least one rigid arm (3). The arm (3) is pivotally attached to one of the dock (1) and the single point mooring system (5). The arm (3) is suspended from the other of the dock (1) and the single point mooring system (5) by at least one tension member (19).

The invention relates to a force analysis method of a single point buoy mooring system of an extra-large ship under the coupling action of stormy waves and provides a mooring force mathematical model suitable for a single point buoy anti-typhoon mooring system of the extra-large ship, which are used for performing identification modeling on a non-steady motion strained condition under a typhoon environment and performing a mathematical simulation test and actual measurement verification on the force motion of the ship without power and interference effects of the typhoon environment. Required input and output data are provided for the identification modeling of the mathematical model through a ship motion physical model test of a single point mooring ship model under the action of wind, currents and waves; and a mooring curve of a buoy type anti-typhoon single point mooring system is deduced and the influence of all component parts on the mooring curve is analyzed by researching a ship-buoy motion law based on catenary and cubic parabola theories, so that the key technical problem of the design of the single point buoy anti-typhoon mooring system is solved.

An arrangement for suspending a Single Point Mooring Turret from its corresponding vessel, by transmitting a circumferentially uniform axial vertical load without moment through the interface of motion between the vessel and turret, by decoupling mooring system loads, inertial loads and hull deflection induced loads, from transmission across that interface. The arrangement supports the turret through a pendular suspension system which includes bogies, having one or more wheels or rollers per bogie, which roll around the circumference of the moonpool on a rail to allow the bogies to rotate in a horizontal plane which is perpendicular to the center line of the moonpool, and to decouple the bearing loads from radial hull deflection due to ovaling caused by rough seas. Radial flexure is achieved by suspending the turret from the bogie through rocker arms and chains, cables, rods or columns between the bogies and a riser support structure of the turret.

A single point mooring includes a yoke-shaped articulated arm assembly, which is affixed to the seabed by a fixed foundation or mooring base assembly, and a mooring support structure, which is retrofitted to a vessel. The articulated arm is connected to the base by a triaxial articulation joint for accommodating yaw, pitch and roll. To moor the vessel, the arm is connected to the mooring support structure with weighted pendants on port and starboard sides. The pendants are suspended at an adjustable elevation with respect to the mooring support structure, thus allowing the mooring system to be used at varying water depths. A combined connection bracket hosts both pendant linkages and umbilicals or hoses for speeding the process of connecting and disconnecting a vessel from the mooring system. A removable anchor, such as a suction pile, fixes the mooring system to the seabed, allows the system to be easily redeployed to another location.

The invention discloses a deepwater net cage with a single-point mooring system. The deepwater net cage comprises a floating pipe frame (1), netting (2) and the mooring system; the floating pipe frame (1) floats on the sea level (SL), the top of the netting (2) is connected with the floating pipe frame (1), and a netting weight (3) is tied and hung at the bottom of the netting (2) so as to form space for mariculture; the mooring system comprises an anchor (4), an anchor rope (5) and an anchor rope weight (6); the floating pipe frame (1) is provided with a box tying point (1a), the anchor (4) is sunk into the sea floor (SF), the lower end of the anchor rope (5) is connected with the anchor (4), the upper end of the anchor rope (5) is connected with the box tying point (1a), the anchor rope weight (6) is tied and hung on the anchor rope (5), and the length of the part, located between a tying and hanging point of the anchor rope weight (6) and the upper end of the anchor rope (5), of the anchor rope (5) approximates the lowest water level water depth of the position of the anchor (4). The deepwater net cage is high in anti-typhoon capacity and risk prevention capacity.

A diamond-shaped wave-resistant and storm-resistant deep-water culture net cage is characterized by comprising a net cage frame system which is composed of an outer floating frame, an inner floating frame, a reinforcement pipe, a 60-degree elbow, 60-120-degree lateral tees, 120-degree elbows and floating frame connecting pieces, a mooring system which is composed of a mooring rope, an anchor chain, an anchorage, a front-end buffer floating ball, middle floating balls, a buffer counter weight and a rear-end buffer floating ball, a net cage flow reduction stable structure which is composed of wave stabilizing plates and front-end flow reduction nettings, and a net bag system which is composed of nettings, ground ropes and a bottom frame. The floating frames are of a diamond-shaped structure, and a multi-section buffer single-point mooring system is adopted by the mooring system, through the diamond-shaped frame structure and the multi-section buffer single point mooring system of a net cage, the top of the net cage directly faces wave currents under the action of the wave currents, and a wave breaking effect is achieved, so that the acting force of the waves to the net cage is reduced, and the Chinese Blue granary strategy implementation and the mariculture development tendency from inshore to deep sea are promoted.

The invention relates to the field of oil field safe operation, and provides a scientific and effective onsite monitoring and prediction technology applied to an underwater soft yoke single-point mooring system in the Bohai bay. Prediction software can be used for providing accurate prediction for mooring response. According to the technical scheme of the invention, the onsite monitoring and prediction system for the underwater soft yoke single-point mooring system comprises a wave current instrument for measurement, an anemoclinograph, a temperature, humidity and air pressure integrated machine, two sets of independent GPS systems longitudinally arranged along the FPSO for acquiring the orientation of the FPSO, a GPS base station, and a GPS mobile station, an inertial measurement unit, a fiber bragg grating strain sensor and an acceleration sensor arranged onto the FPSO. The single-point state monitoring uses all sensors to be connected onto backup channels of the central control system (FOXBORO) for measurement, and acquisition, transmission, display and processing of all measured data can be realized. The system of the invention is mainly applied to oil filed operation.

The invention discloses a single point mooring system device, comprising floating hoses, one or two mooring cables, a tumbler, buoys, a mooring anchor chain, a mooring anchor pile, flexible vertical pipes, an umbilical cable and a manifold platform, wherein the floating hoses 1 are two parallel pipe lines and float on the sea surface; the mooring anchor pile is fixedly arranged on the sea bottom; one end of the mooring anchor chain is tied on the buoys; the other end of the mooring anchor chain is tied on the mooring anchor pile; the buoys are in a cylinder-shaped structure; the cylinder center is formed into an open type center cabin; six sealed cabins are equally divided along the circumference; six sets of chain stoppers are evenly arranged on the outer sides of the bottom parts of the buoys; the tumbler is provided with four functional platforms, namely a mooring platform, a piping platform, a balance platform and a center rotary table; the balance platform is arranged in a manner symmetric with the mooring platform and the piping platform relative to the center platform; and moreover, the whole tumbler can rotate around the buoys. Through the single point mooring system device, a complete set is formed with applicability of operations in various sea areas, and can provide oil tankers of 35 ten thousand tons within 100m water depth with mooring for loading and unloading operations, so that a large berth wharf is unnecessarily built.

The invention belongs to the technical field of underwater environment monitoring and particularly relates to a single-point mooring subsurface buoy observation device. According to the technical scheme, the single-point mooring subsurface buoy observation device comprises a satellite communication buoy (1), a communication cable (2), a control center (3), an ADCP (4), a CTD (5), a cable winding and unwinding winch (6), a main floating body (7), a mooring rope (8), a glass floating ball (9), a releaser (10), an anchoring rope (11) and a ballast anchor (12). The single-point mooring subsurface buoy observation device has the advantages that subsurface buoy commonly using layered various and multiple measuring instruments for vertical profile measuring is changed into a way that the main floating body is located with one or a few measuring instrument, vertical profile measuring is performed by controlling up and down of the main floating body, and data can be transmitted regularly and reliably; advantages of buoys and universal subsurface buoys are combined; the single-point mooring subsurface buoy observation device is simple in system structure, low in cost, and convenient in distribution.

The invention discloses a device for quick release of a soft yoke and a mooring leg in a single-point mooring system and relates to the technical field of single-point mooring. A hydraulic pump station is adopted to pull a guide pin shaft to move, so that quick release of the soft yoke and the mooring leg in the single-point mooring system is achieved. The device comprises a hydraulic pump station, a guide base, a guide pin shaft, a lug ring head, an installation support, a hydraulic cylinder and a support platform. In the action of quick release, the hydraulic pump station provides a power source to drive the hydraulic cylinder to move, the hydraulic cylinder is assembled on the installation support, the lug ring head is connected with the guide pin shaft and a piston rod of the hydraulic cylinder, and the guide pin shaft, the guide base and the hydraulic cylinder are coaxially installed; in this way, borne friction force is reduced during pulling of the guide pin shaft, time for pulling out of the pin shaft is shortened, and quick release of the soft yoke and the mooring leg in the single-point mooring system is achieved. The device is simple in structure and ingenious in concept; the reliability and safety of the single-point mooring system are improved; meanwhile, production is easy, assembly and replacement are convenient, and manufacturing cost can be reduced greatly.

A submersible active support structure for turbine towers and substations or similar elements, in offshore facilities, which is made up of hollow concrete bodies joined together by means of segments or beams, through which water passes from one body to another, with a pumping system that regulates the inclination of the structure based on the overturning moment, equipped with means for regulating immersion, which regulate the amount of water in the hollow bodies such that, in its working position, the center of gravity of the structure is below the center of buoyancy thereof, and the area of the cross-section of the structure at the waterline is smaller than the sum of the submerged cross-sections of said hollow bodies. In addition, the assembly may operate with a traditional mooring system, or with a single-point mooring system that enables the assembly to position itself facing the wind. Lastly, to install it in shallow areas, a special design may be used which enables the assembly to sit upon the sea bed, thus reducing and evening out the loads upon the same.

The invention discloses a liquid rotating joint for a single point mooring system, which adopts a butterfly mode of a swing bearing. An inner ring is installed at the top of a bracket, two inlet pipes are arranged at the bottom of the bracket, an end cover is installed on the inner ring, and an outer ring is rotated around the inner ring and the end cover through a swing supporting bearing provided with a waterproof shield to from a matched sealing surface and an annular special-shaped hollow cavity; the outer wall of the outer ring is symmetrically provided with two holes communicated with the annular special-shaped hollow cavity, and each hole is connected with an outlet pipe; an L-shaped broken line type sealing form is adopted, a first ring and a second ring of the sealing surface are sand proof sealing rings and are connected with a sand sediment groove and a sand removing hole communicated with the sand sediment groove; and a third ring, a fourth ring and a fifth ring of the sealing surface are sealing rings and are connected with a leakage detection device, and a waterproof sealing ring is arranged on each joint surface adjacent to the outer side. A plurality of liquid rotating joints can be combined for utilization, and the bracket on the joint is connected with the end cover below the bracket; and the liquid rotating joints with different calibers can be singly combined or combined in an overlapping way. The liquid rotating joint for the single point mooring system has the advantages of reasonable structure, simpleness for installation and favorable sealing property and effectively solves the problem of wearing of sand grains on the inner ring, the outer ring and the side wall.

An arrangement for suspending a Single Point Mooring Turret from its corresponding vessel, by transmitting a circumferentially uniform axial vertical load without moment through the interface of motion between the vessel and turret, by decoupling mooring system loads, inertial loads and hull deflection induced loads, from transmission across that interface. The arrangement supports the turret through a pendular suspension system which includes bogies, having one or more wheels or rollers per bogie, which roll around the circumference of the moonpool on a rail to allow the bogies to rotate in a horizontal plane which is perpendicular to the center line of the moonpool, and to decouple the bearing loads from radial hull deflection due to ovaling caused by rough seas. Radial flexure is achieved by suspending the turret from the bogie through rocker arms and chains, cables, rods or columns between the bogies and a riser support structure of the turret.

The invention discloses a self-regulation type single point mooring system. The self-regulation type single point mooring system is formed by a mooring device, a floating cylinder device, a connecting device and a control device, wherein the mooring device comprises a mooring cable, a connecting chain, a suspending heavy block and an undersea anchoring device; the floating cylinder device is formed by a mooring rotary disk which is arranged at the bottom end, a rotating shaft, a mooring floating cylinder and a rotating connector; the connecting device is provided with a damping connecting arm and a connecting rod; and the mooring floating cylinder can do 360-degree rotation along the rotating shaft through the rotating connector, the damping connecting arm is rigidly connected with a ship body, the connecting rod is in butt joint with the damping connecting arm after being hinged with the mooring floating cylinder, and thus the ship body can do 360-degree rotation along a floating cylinder. According to the self-regulation type single point mooring system disclosed by the invention, the recovery ability and the stability of the mooring system can be increased by adding the suspending heavy block, the mutual winding of vertical tubes is avoided due to the application of the rotating shaft and the rotating connector, the operation safety is ensured, and the connecting device under the action of the control device is rigid and flexible.

A facility for producing and processing fluids, including a boat with a system for rotatable single-point mooring via a turret pivotably mounted in a shaft which extends vertically through the hull of the boat. The turret includes an upper portion having a rotary device for receiving and supporting incoming fluid-transfer pipes, and an upper bearing, smaller in diameter than the shaft, positioned between a head portion of the upper portion of the turret and a supporting structure connected to the hull of the vessel. The upper bearing of the turret is located above the rotary device for receiving and supporting the incoming fluid-transfer pipes.

The invention discloses a natural heat exchange type air-source fresh water generation device. The device at least comprises a water diversion mechanism (1), a water condensation mechanism (2) and a power supply mechanism, wherein the water diversion mechanism (1) is used for delivering low-temperature seawater into a seawater pipeline in the water condensation mechanism (2), and the water condensation mechanism (2) comprises an air inducing device (13) and a water condenser (14). The air inducing device (13) is used for inducing damp and hot air into an air duct of the water condenser (14), and the water condenser (14) serving as a water condensation medium enables the induced damp and hot air to be cooled by the seawater so as to generate condensate water. The power supply mechanism is used for supplying power to the whole device. The invention further discloses a fresh water generation system comprising the natural heat exchange type air-source fresh water generation device. The fresh water generation system comprises a breakwater, a header pipe, a water collection and delivery pipe, a fresh water treatment and production operation platform, an outer delivery pipeline and a single-point mooring device. The natural heat exchange type air-source fresh water generation device and the fresh water generation system have the advantages that the condensate water is generated according to a temperature difference of different substances in the nature world, and accordingly energy saving and large-scale fresh water generation are achieved; the whole device can be arranged on the sea, so that land is saved.

A monitoring and early warning device for tower type single point mooring marine floating production oil storage systems is provided with a switch. The switch is connected with a monitoring device, an environment condition monitoring device and a computer used for the marine floating production oil storage system and the single point mooring system, the computer is connected with an early warning device, and input information of weather forecast, loading conditions and a motion stress database is input to the computer for information interaction. The monitoring device comprises a closed circuit television system, an interval monitoring system, a soft rigid arm stress monitoring system and a soft rigid arm position monitoring system, wherein a user can visually see a motion video of a soft rigid arm through the closed circuit television system. The environment condition monitoring device comprises a marine wave current monitoring system and a meteorological monitoring system. According to the monitoring and early warning device, motion and loads of the marine floating production oil storage system can be monitored, and meanwhile risk assessment and risk early warning can be carried out on the marine floating production oil storage system.

The invention discloses an inwards rotation tower single-point mooring device. The novel inwards rotation tower single-point mooring device comprises single-point buoys, a rotation tower structure, a vertical pipe deck, a ball collecting deck, a sliding ring combination and a mooring cable, wherein the single-point buoys are connected with the rotation tower structure; the mooring cable is arranged on the bottoms of the single-point buoys; the vertical pipe deck and the ball collecting deck are successively arranged on the top of the rotation tower structure; and the sliding ring combination is arranged on the ball collecting deck, and comprises a plurality of liquid sliding rings, an electric sliding ring or an optical fiber sliding ring. The requirement on a continuous working weather window is low during connection and disconnection; and the novel inwards rotation tower single-point mooring device particularly has obvious advantages under the condition that the requirement on two to three weeks of continuous weather windows needed by single-point return connection without a disconnection device is met difficultly in a winter monsoon climate.

The invention discloses a water soft yoke mooring model test system. The system comprises a six-degree-of-freedom motion simulation platform, a mooring support, a mooring leg, a mooring arm, a ballasttank and a single point platform. The six-degree-of-freedom motion simulation platform simulates the motion attitude of a hull in a waterless environment and produces coupling motion. The mooring support transmits the hull motion of the six-degree-of-freedom motion simulation platform to a soft steel arm mooring system. The lower end of the mooring leg is connected to the mooring arm, and the upper end is connected to the mooring support. The mooring arm is a rigid A-shaped framework, and the ballast tank at a transverse support portion provides a restoring force so as to achieve a damping effect. The single point platform is the fixed structure of a soft yoke test model, and the upper portion is a mooring head. In the invention, based on a real single point mooring structure, scaling andmodel simplification are performed so as to realize mooring structure motion simulation in the waterless environment. Simultaneously, the test system adopts a modularization design and expansibilityis good; and a correlation component is replaced and a corresponding sensor is arranged so as to satisfy different scientific research demands.

Apparatus is described for mooring a floating vessel (10) particularly suited to a tanker transporting liquid natural gas which needs to be moored in an offshore environment. The apparatus comprises a semi-submersible floating dock (1) a single point mooring system (5) and at least one rigid arm (3). The arm (3) is pivotally attached to one of the dock (1) and the single point mooring system (5). The arm (3) is suspended from the other of the dock (1) and the single point mooring system (5) by at least one tension member (19).

The invention discloses an r-shaped anchor system and a method suitable for lifting and recovering in the buoy wharf test, including buoys, Anchor tether, loop, Anchor chains, anchors and lifting ropes, The buoy is connected with one end of the anchor tether rope, the anchor tether rope is fixed on the tether pile arranged on the wharf through the other end of the ring piece, the buoy is connected with the tether pile through the lifting rope, the anchor tether rope is tensioned, the lifting rope is suitably relaxed, and the whole anchor tether is r-shaped. Can meet the buoy wharf test to maintain a single point mooring characteristics, only with cranes can achieve the lifting and recovery requirements.

A flange for coupling the marine hoses with each other is provided on an outer surface of its cylindrical portion with a liquid leakage sensor and a strain gauge. Information from the liquid leakage sensor and the strain gauge are transmitted through a signal line to an information accumulation device on a single-point mooring buoy. A computer is connected to the single-point mooring buoy, and the information transmitted from the liquid leakage sensor and the strain gauge is taken into the computer to detect a marine hose having a liquid leakage and a marine hose having an experienced abnormal external force. Further, the information transmitted from the strain gauge is taken into the computer, and a fatigue degree of each marine hose is estimated based on the number of times in which stress exceeding a specific minimum setting value has been generated in the marine hose and on the magnitude of each stress. Such information is displayed on a computer display image and the replacing time of a marine hose is estimated based on the information.

The invention relates to the field of production of offshore oil, in particular to a method for changing connecting tubes in FPSO (floating production storage and offloading) single-point buoys. The method aims at realizing inward rotation tower type single-point mooring. The method comprising the steps of lowering worn connecting tubes by using a long bolt and a hydraulic jack; then mounting a wire rope sling; and changing the single-point worn connecting tubes one by one by using an auxiliary winch arranged on the upper portion of a rotation tower. By the method for changing the connecting tubes in the FPSO single-point buoys, single-point flexible vertical tubes can be remounted or heads of the single-point flexible vertical tubes can be fixed before typhoon, so that the time for whole construction is prolonged, and the worn connecting tubes can be changed in a single-point manner even during typhoon. Moreover, because the auxiliary winch is arranged on the upper portion of the single-point rotation tower, relative motion does not exist, strict ship limiting operation is not required when the worn connecting tubes are lowered and new connecting tubes are lifted, construction risks can be reduced, and the construction cost for a ship is saved.

The invention relates to an auxiliary lifting pontoon and a method for lifting an underwater object by using the same. The auxiliary lifting pontoon comprises a pontoon main body with two closed ends, wherein the pontoon main body comprises a cylindrical middle cabin section and two side cabin sections; the two side cabin sections are arranged at the two opposite ends of the middle cabin section; and a cavity of the middle cabin section and cavities of the side cabin sections are partitioned from each other. A first lifting lug and a second lifting lug are respectively arranged on a first side and a second side of the pontoon main body, wherein the first side and the second side are opposite to each other. First ports communicated with the cavities are respectively formed in first sides of the two side cabin sections so that the cavities of the side cabin sections can be inflated and deflated. Second ports communicated with the cavities are respectively formed in the side walls of second sides of the two side cabin sections so that water can flows in or out of the cavities of the side cabin sections. Through an underwater lifting function of the auxiliary lifting pontoon, the underwater object to be lifted, such as a single point mooring system and the like, can be lifted to am appropriate water depth for air downhole maintenance operation; therefore, the operation efficiency can be increased, the influence of wind waves can be reduced, the safety in construction can be enhanced, and offshore construction time and cost can be also reduced.

The invention relates to the field of oilfield operation safety and provides a scientific and effective field monitoring technology applicable to a deep water turret-type single point mooring system, which can monitor wind, wave, temperature, humidity, air pressure environmental conditions of a FPSO (Floating Production Storage and Offloading) operation sea area, FPSO heading, a single point position, FPSO six-degree of freedom motion, and a stressed force of a mooring cable, provide timely and accurate mooring safety information for an operation manager, enable the operation manager to perform safety management with a plan and ensure FPSO safety operation. The field monitoring system applicable to the deep water turret-type single point mooring system in the adopted technical scheme comprises a wave radar used to obtain a wave height, an anemoclinograph for acquiring a wind speed, a temperature, humidity and air pressure integrated machine, a GPS antenna (that is, a mobile station), an inertial measurement unit (IMU), a mooring inclinometer and a UPS system for providing uninterrupted power supply for all monitoring devices. the system of the invention is mainly applied to an oilfield device design and mounting situation.

The present invention relates to a liquid swivel adapter device. It is characterized by that it includes at least one adapter unit, every adapter unit includes a connecting barrel, the top portion of the described connecting barrel is connected with a barrel-shaped fixed ring, the exterior of the described fixed ring is turnably connected with a moving ring by means of bearing and sealing ring, between the described moving ring and the described fixed ring a circular hollow cavity is formed, in the wall surface of the described fixed ring a fixed pipe adapter communicated with the described circular hollow cavity is set, the outlet end of the described fixed pipe adapter is downwards inserted into the described connecting barrel interior, and outside of wall surface of the described moving ring a turning pipe adopter is set, said turning pipe adapter is communicated with the described circular hollow cavity and is used for connecting with single-point mooring system pipeline.

The invention provides a sector rotation single point mooring liquid transportation system. The sector rotation single point mooring liquid transportation system comprises two or three fixed mooring liquid transportation modules or a movable mooring liquid transportation module, a tail tug and an auxiliary limiting tug. The mooring liquid transportation modules are arranged on the outer edge of the top of a floating body of a straight cylinder type floating platform. Each mooring liquid transportation module comprises an outer liquid transportation roller and a mooring winch. The floating body comprises an upright cylinder and a movement reduction mechanism. A shuttling transportation ship rotates in sector planes with mooring points as vertexes and the connection lines between the center of the straight cylinder type floating platform and the mooring points serving as the vertexes as symmetric lines. The directions of the connection lines between the center of the straight cylinder type floating platform and the mooring points are consistent with the main air guide direction of the water area where the platform is located. When the shuttling transportation ship goes beyond the ranges of the parts, deviating from the sector planes, of the two sides of the symmetric lines, the auxiliary limiting tug can eject or pull the shuttling transportation ship. The invention further provides another sector rotation single point mooring liquid transportation system. By means of the sector rotation single point mooring liquid transportation system, stored liquid can be safely and conveniently transported to the traditional shuttling transportation ship.