CN103600818B - A kind of regulatable semisubmersible platform in buoyancy aid direction and regulate and control method - Google Patents
A kind of regulatable semisubmersible platform in buoyancy aid direction and regulate and control method Download PDFInfo
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- CN103600818B CN103600818B CN201310551800.8A CN201310551800A CN103600818B CN 103600818 B CN103600818 B CN 103600818B CN 201310551800 A CN201310551800 A CN 201310551800A CN 103600818 B CN103600818 B CN 103600818B
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Abstract
The present invention discloses the regulatable semisubmersible platform in a kind of buoyancy aid direction and regulate and control method, described platform is connected and composed by main platform body, 4 columns, 4 pivoting supports, 4 fish shape buoyancy aids from top to down successively successively, comprises in addition and is arranged at anchor mooring positioning system in main platform body and direction adjustment device.Described method is measured seawater velocity by flow speed and direction sensor and is flowed to signal, by the angle signal of angle measuring sensor measurement fish shape buoyancy aid longitudinal direction with main platform body, pass to industrial computer, industrial computer sends control command to rotary servovalve motor, drive pivoting support, 4 fish shape buoyancy aids are rotated, until fish shape buoyancy aid is longitudinally parallel with seawater eroding direction relative to respective column.The invention enables anchor to be drawn out sea bed probability minimum, be conducive to ensureing semisubmersible platform normal operation.
Description
Technical field
The invention belongs to ocean engineering field, relate to a kind of buoyancy aid direction is regulatable, adopt anchor mooring positioning system semisubmersible platform and buoyancy aid direction regulate and control method thereof.
Background technology
At present, the exploration of offshore oil and gas resource and exploitation are constantly to deep-water developments, and be increased to the km depth of water by hundred meters of depth of waters, platform is the critical equipment of offshore and gas development.Known platform can be divided into jack-up platform and semisubmersible platform two class.Wherein, jack-up platform carries out production work by spud leg, shoe support platform main body in sea, operating water depth is larger, spacing between the overall length of spud leg, spud leg, shoe and platform body contours size are larger, therefore, jack-up platform operating depth is generally no more than 200 meters, cannot carry out oil-gas exploration and the exploitation in more territory, deep-sea.
Semisubmersible platform is then the main equipment of deepwater petroleum exploration and exploitation, utilize buoyancy aid (being commonly called as " fish shape ship " or " fish shape buoyancy aid ") floating across the sea to play main platform body by upright supports, can explore and exploit the offshore oil and gas resource of the km depth of water.Operationally, seawater acts on fish shape ship with wave load and current load form semisubmersible platform, and wherein wave load is dynamic load, and current load is permanent load.When seawater eroding direction changes, fish shape ship strained condition also changes thereupon.The seawater eroding lower stress that semisubmersible platform is being parallel to fish shape ship longitudinal direction is minimum, maximum at the seawater eroding lower stress perpendicular to fish shape ship longitudinal direction, maximum load be generally minimum load 3 ?5 times.
Position fixing system is for balancing external load suffered by semisubmersible platform, ensure that it is in rational range of movement at sea, and the important equipment of normal production operation can be carried out, be mainly divided into three kinds: anchor mooring positioning system, dynamic positioning system (DPS) and anchoring and power combination position fixing system.Wherein, anchoring location be a kind of anchor and anchor chain, anchor hawser of adopting by semisubmersible platform mooring in sea, the drifts caused by environmental load such as restriction wind, wave and ocean current, make semisubmersible platform be held in a predetermined position the locate mode of operation.In general, for the semisubmersible job platform of depth of water operation below 1500 meters, adopt anchor mooring positioning system.
For the semisubmersible platform adopting anchor mooring positioning system, the wave load born and current load are delivered to are fixed on the anchor in seabed by windlass, anchor chain, anchor hawsers.Cause the distribution of stress of the sea bed soil around anchor to change, be embodied in two aspects: the stress amplitude caused by wave load, the steady component of stress caused by current load.This distribution of stress characteristic may cause the sea bed soil generation endurance failure around anchor then to loosen, anchor is caused to be drawn out sea bed, slippage is there is relative to seabed, the strained condition of anchoring system is changed thereupon, now semisubmersible platform normally cannot be held in a predetermined position operation and even occurs integral inclined, especially when semisubmersible platform is subject to the seawater eroding perpendicular to fish shape ship longitudinal direction, the maximum probability that this situation occurs, than the situation being subject to the seawater eroding being parallel to fish shape ship longitudinal direction exceed 3 ?5 times.
But, there is following shortcoming in the semisubmersible platform of known employing anchor mooring positioning system: after completing anchor mooring positioning system and installing, no matter be subject to wave and the action of ocean current in which direction, the direction of fish shape ship self all cannot change, fish shape ship strained condition is caused to change along with seawater eroding direction and change, and then cause the distribution of stress of the sea bed soil around anchor also can change along with seawater eroding direction and change, cannot ensure that soil distribution of stress is in minimum rating all the time, the probability that anchor is drawn out sea bed is very large.
Summary of the invention
The object of the invention is, in order to overcome prior art defect, to provide the regulatable semisubmersible platform in a kind of buoyancy aid direction and regulate and control method.The wave load that the present invention can make fish shape buoyancy aid bear all the time and current load are in minimum rating, namely the seawater eroding being parallel to fish shape buoyancy aid longitudinal direction is born, ensure that the soil distribution of stress around anchor is in minimum rating all the time, make anchor be drawn out sea bed probability minimum, be conducive to ensureing semisubmersible platform operation and do not occur integral inclined on a predetermined position.
In order to achieve the above object, the technical solution used in the present invention is:
The regulatable semisubmersible platform in a kind of buoyancy aid direction, is connected and composed by main platform body, 4 columns, 4 pivoting supports, 4 fish shape buoyancy aids from top to down successively successively, comprises in addition and is arranged at anchor mooring positioning system in main platform body and direction regulation device; Fish shape buoyancy aid with pivoting support, adopt screw to be connected between pivoting support with column respectively; Column bottom adopts singletree to connect between any two; Every root post lower end is equipped with flange shape support, 3 rotary servovalve motors, and 3 rotary servovalve motors are mutually 120 ° and are arranged on flange shape support and and adopt cylindric straight-tooth gear to form Inside gear drive between pivoting support.
Described anchor mooring positioning system is made up of the mooring positioning device that 4 nested structures being distributed in main platform body upper deck 4 corners are identical, and described mooring positioning device is connected in sequence by anchor winch, mooring line, fairlead, anchor.
Described direction regulation device comprises flow speed and direction sensor, wireless signal transmitter, wireless signal receiver, angle measuring sensor, A/D converter, industrial computer, D/A converter and actuator, wherein, flow speed and direction sensor, wireless signal transmitter are arranged across the sea and are tied up on fish shape buoyancy aid by tightrope, the seawater velocity collected for gathering seawater velocity and flowing to signal, and to be flowed to by wireless signal transmitter and radios to and connect wireless signal receiver by flow speed and direction sensor; Angle measuring sensor is arranged in column bottom, for the fish shape buoyancy aid measured longitudinally with the angle of main platform body; The signal that wireless signal receiver receives, and fish shape buoyancy aid longitudinally transfers to actuator and then controls rotary servovalve motor running through A/D converter, industrial computer, D/A converter with the angle signal of main platform body successively.
The regulate and control method of the regulatable semisubmersible platform in a kind of buoyancy aid direction of the present invention, comprises the steps:
First step S1: gather seawater velocity by flow speed and direction sensor and flow to signal, and outwards send seawater velocity by wireless signal transmitter and flow to signal;
Second step S2: receive seawater velocity by wireless signal receiver and flow to signal, passing to industrial computer through A/D converter;
3rd step S3: industrial computer extracts seawater velocity signal and calculates its average va, compares average va and the setting value v0 of seawater velocity, if the average va of seawater velocity is less than v0, returns first step S1, otherwise enter the 4th step S4;
4th step S4: industrial computer extraction seawater flows to signal and calculates seawater and flows to opposed platforms main body angle and average α a thereof, seawater is flowed to the average α a of opposed platforms main body angle compared with the angle β of the longitudinal opposed platforms main body of the fish shape buoyancy aid of angle measuring sensor collection, if both differences are less than 3 °, return first step S1, otherwise enter the 5th step S5;
5th step S5: industrial computer sends control command, through D/A converter, actuator, controls rotary servovalve motor, with the angular turn fish shape buoyancy aid of (α a ?β), makes it longitudinally flow to parallel with seawater, returns first step S1 and continue to repeat above-mentioned flow process.
The regulatable semisubmersible platform in a kind of buoyancy aid direction of the present invention and regulate and control method, have the following advantages and beneficial effect:
Measure seawater velocity by flow speed and direction sensor and flow to signal, by the angle signal of angle measuring sensor measurement fish shape buoyancy aid longitudinal direction with main platform body, pass to industrial computer, industrial computer sends control command to rotary servovalve motor, drive pivoting support, 4 fish shape buoyancy aids are rotated relative to respective column, until fish shape buoyancy aid is longitudinally parallel with seawater eroding direction, now, suffered by semisubmersible platform, seawater load is minimum, the seawater load that anchor mooring positioning system bears also is in minimum rating, thus to be drawn out sea bed probability minimum for anchor, be conducive to ensureing semisubmersible platform normal operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the regulatable semisubmersible platform in buoyancy aid direction of the present invention;
Fig. 2 is the front view of flange shape support of the present invention;
Fig. 3 is the diagram of circuit of regulate and control method of the present invention;
Fig. 4 is the present invention when seawater load vertical fish shape buoyancy aid is longitudinal, the birds-eye view before adjustment;
Fig. 5 is the present invention when seawater load vertical fish shape buoyancy aid is longitudinal, the birds-eye view after adjustment;
In figure: 1-anchor, 2-mooring line, 3-fairlead, 4-anchor winch, 5-column, 6-fish shape buoyancy aid, 7-pivoting support, 8-singletree, 9-main platform body, 10-flow speed and direction sensor, 11-rotary servovalve motor, 12-flange shape support, 13-wireless signal transmitter, 14-wireless signal receiver, 15-A/D conv, 16-industrial computer, 17-D/A conv, 18-actuator, 19-signal wire (SW), 20-angle measuring sensor.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
As shown in Figure 1, for the regulatable semisubmersible platform in a kind of buoyancy aid direction of the present invention, connected and composed successively by main platform body 9,4 columns 5,4 pivoting supports 7,4 fish shape buoyancy aids 6 successively from top to down, comprise anchor mooring positioning system, direction regulation device in addition.Fish shape buoyancy aid 6 with pivoting support 7, adopt screw to be connected between pivoting support 7 with column 5 respectively.Column 5 bottom adopts singletree 8 to connect between any two.Every root post 5 lower end is equipped with flange shape support 12(as shown in Figure 2), 3 rotary servovalve motors 11, rotary servovalve motor 11 is mutually 120 ° and is evenly arranged on flange shape support 12, and adopts cylindric straight-tooth gear to form Inside gear drive between pivoting support 7.
As shown in Figure 1, anchor mooring positioning system in the present invention is made up of the mooring positioning device that 4 nested structures being distributed in main platform body 9 upper deck 4 corners are identical, carry out 4 anchoring location to semisubmersible platform, this device is connected in sequence by anchor winch 4, mooring line 2, fairlead 3, anchor 1.Direction adjustment device comprises flow speed and direction sensor 10, wireless signal transmitter 13, wireless signal receiver 14, angle measuring sensor 20, A/D converter 15, industrial computer 16, D/A converter 17, actuator 18, rotary servovalve motor 11, and some signal wire (SW)s 19, wherein, flow speed and direction sensor 10, wireless signal transmitter 13 is arranged across the sea, connected by signal wire (SW) 19 between them, and tie up on fish shape buoyancy aid 6 by tightrope, flow speed and direction sensor 10 gathers seawater velocity and flows to signal and will collect signal wireless by wireless signal transmitter 13 and is transferred to and connects wireless signal receiver 14, angle measuring sensor 20 is arranged in column 5 bottom, for the fish shape buoyancy aid 6 measured longitudinally with the angle of main platform body 9, adopt signal wire (SW) 19 to connect between wireless signal receiver 14, A/D converter 15, industrial computer 16, D/A converter 17, actuator 18, be arranged in main platform body 9, be also connected by signal wire (SW) 19 between angle measuring sensor 20 with A/D converter 15 in addition.
Direction regulation device in the present invention is mainly used to the angle signal measured seawater velocity and flow to signal and fish shape buoyancy aid 6 longitudinal direction and main platform body 9, and these signal transmission to industrial computer 16, control command is sent to actuator 18 again by industrial computer 16, control rotary servovalve motor 11, rotary servovalve motor 11 is after receiving actuator 18 signal, by with pivoting support 7 gears meshing, export moment of gyration fish shape buoyancy aid 6 is rotated; The effect of flange shape support 12 is that fixing rotary servovalve motor 11 is on column 5; Pivoting support 7 is mainly used to connect column 5 and fish shape buoyancy aid 6, and fish shape buoyancy aid 6 can be rotated relative to column 5.
Buoyancy aid direction regulate and control method in the present invention, as shown in Figure 3, the first step (S1): gather seawater velocity by flow speed and direction sensor 10 and flow to signal, and outwards send this signal by wireless signal transmitter 13; Second step (S2): received flow velocity by wireless signal receiver 14, flowed to signal, passes to industrial computer 16 through A/D converter 15; 3rd step (S3): industrial computer 16 extracts flow velocity signal and calculates its average va, compares va and setting value v0, if va is less than v0, returns first step S1, otherwise enter the 4th step S4; 4th step (S4): industrial computer 16 extracts to flow to signal and calculate seawater and flows to opposed platforms main body 9 angle and average α a thereof, compared with the angle β of the longitudinal opposed platforms main body 9 of fish shape buoyancy aid 6 that α a is gathered with angle measuring sensor 20, if both differences are less than 3 °, return first step S1, otherwise enter the 5th step S5; 5th step (S5): industrial computer 16 sends control command, through D/A converter 17, actuator 18, control rotary servovalve motor 11, with the angular turn fish shape buoyancy aid 6 of (α a ?β), make it longitudinally flow to parallel with seawater, return first step S1 and repeat above-mentioned flow process.
Concrete use procedure is as follows:
First, mobile semisubmersible platform, to working sea area, adopts above-mentioned anchor mooring positioning system to carry out 4 anchoring location to it.Secondly, flow speed and direction sensor 10 and wireless signal transmitter 13 are put on sea and tie up on fish shape buoyancy aid 6 by tightrope, angle measuring sensor 20 is arranged in column 5 bottom, and wireless signal receiver 14, A/D converter 15, industrial computer 16, D/A converter 17, actuator 18 are arranged in main platform body 9.Now platform can enter mode of operation.
Suppose that semisubmersible platform is subject to the seawater eroding longitudinally vertical with fish shape buoyancy aid 6, as shown in Figure 4, first, gather seawater velocity by flow speed and direction sensor 10 and flow to signal, and outwards send this signal by wireless signal transmitter 13; Then, received flow velocity by wireless signal receiver 14, flowed to signal, pass to industrial computer 16 through A/D converter 15, industrial computer 16 extracts flow velocity signal and calculates its average va=40m/s, compares va and setting value v0=10m/s, va are greater than v0; Then, industrial computer 16 extracts and flows to signal and calculate seawater and flow to opposed platforms main body 9 angle and average α a=90 ° thereof, and compare longitudinal opposed platforms main body 9 angle β=0 of fish shape buoyancy aid 6 ° and α a, both differences are greater than 3 °; Finally, industrial computer 16 sends control command, through D/A converter 17, actuator 18, controls rotary servovalve motor 11, with the angular turn fish shape buoyancy aid 6 of 90 °, makes it longitudinally flow to parallel with seawater, as shown in Figure 5.
Claims (2)
1. the regulatable semisubmersible platform in buoyancy aid direction, described platform is connected and composed by main platform body (9), 4 columns (5), 4 pivoting supports (7), 4 fish shape buoyancy aids (6) from top to down successively successively, described main platform body (9) is also provided with anchor mooring positioning system and direction regulation device, described fish shape buoyancy aid (6) is with pivoting support (7), adopt screw to be connected respectively between pivoting support (7) with column (5), described column (5) bottom adopts singletree (8) to connect between any two, every root post (5) lower end is equipped with flange shape support (12), 3 rotary servovalve motors (11), 3 rotary servovalve motors (11) be mutually 120 ° be evenly arranged on flange shape support (12) upper and and adopt cylindric straight-tooth gear to form Inside gear drive between pivoting support (7), described anchor mooring positioning system is made up of the mooring positioning device that 4 nested structures being distributed in main platform body (9) upper deck 4 corners are identical, and described mooring positioning device is connected in sequence by anchor winch (4), mooring line (2), fairlead (3), anchor (1), it is characterized in that: described direction regulation device comprises flow speed and direction sensor (10), wireless signal transmitter (13), wireless signal receiver (14), angle measuring sensor (20), A/D converter (15), industrial computer (16), D/A converter (17) and actuator (18), wherein, flow speed and direction sensor (10), wireless signal transmitter (13) is arranged across the sea and is tied up on fish shape buoyancy aid (6) by tightrope, flow speed and direction sensor (10) flows to for gathering seawater velocity and by wireless signal transmitter (13), the seawater velocity the collected flow direction is radioed to wireless signal receiver (14), angle measuring sensor (20) is arranged in column (5) bottom, for measuring the angle of fish shape buoyancy aid (6) longitudinal direction and main platform body (9), wireless signal receiver (14) seawater velocity received is flowed to signal and fish shape buoyancy aid longitudinally transfers to actuator (18) and then controls rotary servovalve motor (11) and operate through A/D converter (15), industrial computer (16), D/A converter (17) with the angle signal of main platform body successively.
2., based on a regulate and control method for the regulatable semisubmersible platform in buoyancy aid direction according to claim 1, it is characterized in that comprising the steps:
First step S1: gather seawater velocity by flow speed and direction sensor (10) and flow to signal, and outwards send seawater velocity by wireless signal transmitter (13) and flow to signal;
Second step S2: receive seawater velocity by wireless signal receiver and flow to signal, passing to industrial computer (16) through A/D converter (15);
3rd step S3: industrial computer (16) extracts seawater velocity signal and calculates its average va, compares average va and the setting value v0 of seawater velocity, if the average va of seawater velocity is less than v0, returns first step S1, otherwise enter the 4th step S4;
4th step S4: industrial computer (16) extraction seawater flows to signal and calculates seawater and flows to opposed platforms main body (9) angle and average α a thereof, compared with the angle β of the longitudinal opposed platforms main body (9) of fish shape buoyancy aid (6) that average α a seawater being flowed to opposed platforms main body (9) angle gathers with angle measuring sensor (20), if both differences are less than 3 °, return first step S1, otherwise enter the 5th step S5;
5th step S5: industrial computer (16) sends control command, through D/A converter (17), actuator (18), control rotary servovalve motor (11), with angular turn fish shape buoyancy aid (6) of (α a-β), make it longitudinally flow to parallel with seawater, return first step S1 and continue to repeat above-mentioned flow process.
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| CN201310551800.8A CN103600818B (en) | 2013-11-08 | 2013-11-08 | A kind of regulatable semisubmersible platform in buoyancy aid direction and regulate and control method |
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| CN201310551800.8A CN103600818B (en) | 2013-11-08 | 2013-11-08 | A kind of regulatable semisubmersible platform in buoyancy aid direction and regulate and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104443293B (en) * | 2014-09-29 | 2017-04-26 | 华中科技大学 | Underwater tension leg platform submerging and surfacing control system and method |
| CN105253264B (en) * | 2015-04-28 | 2017-09-01 | 江苏科技大学 | Control method of sea wave compensation device of deepwater semi-submersible drilling platform |
| CN105129037B (en) * | 2015-07-15 | 2018-03-27 | 中国海洋石油总公司 | A kind of column stable sea nuclear power platform |
| CN108689316A (en) * | 2018-06-04 | 2018-10-23 | 中天科技集团海洋工程有限公司 | A kind of crane barge ship |
| CN109747785B (en) * | 2019-01-24 | 2022-04-26 | 志行海事技术服务(广州)有限责任公司 | Ship-sea engineering multi-point mooring anchor-paddle combined cooperative positioning system and method |
| CN112681273B (en) * | 2021-01-14 | 2022-09-02 | 国网上海市电力公司 | Wind power generation type automatic salvage equipment for marine garbage |
| CN112900405A (en) * | 2021-01-20 | 2021-06-04 | 长江勘测规划设计研究有限责任公司 | Mooring system applied to port water surface prefabricated platform and construction method |
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