CN105398545A - Tensioning method of mooring anchor legs - Google Patents
Tensioning method of mooring anchor legs Download PDFInfo
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- CN105398545A CN105398545A CN201510828010.9A CN201510828010A CN105398545A CN 105398545 A CN105398545 A CN 105398545A CN 201510828010 A CN201510828010 A CN 201510828010A CN 105398545 A CN105398545 A CN 105398545A
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- anchor
- rope socket
- winch
- installation ship
- leg
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B2021/003—Mooring or anchoring equipment, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention discloses a tensioning method of mooring anchor legs. The method comprises the following steps of: after an attraction anchor of anchor legs of an attraction anchor mounting ship is mounted and a new anchor hawser of the anchor legs is paved, enabling an anchor chain mounting ship to move to a new anchor hawser terminal position, and recovering a hawser connector of a new anchor hawser to the anchor chain mounting ship; fixing the hawser connector, and enabling two ends of a dynamometer to be separately connected with the hawser connector and a winch through working chains; putting the hawser connector in the sea, and fixing the working chain between the dynamometer and the winch; adjusting the heading of the anchor chain mounting ship so as to form a pre-set inclined angle between the tensioning direction and the set directions of the anchor legs; in the tensioning direction, implementing tensioning on the anchor legs by controlling the horsepower of the anchor chain mounting ship; and controlling the anchor chain mounting ship to decrease the horsepower, and unloading the pulling force of the anchor legs. The anchor leg tensioning method disclosed by the invention is implemented on the water, is simple and easy to operate and high in efficiency.
Description
Technical field
The present invention relates to Offshore Engineering field, particularly relate to a kind of tensioning method of mooring anchor leg.
Background technology
At present, inner cupola formula single buoy mooring system (STP, SubmergedTurretProduction) be the single buoy mooring system that one is widely used in that oil tanker (FPSO, FloatingProductionStorageandOffloading) is unloaded in Floating Production storage.After field facility place in operation, through operation for many years, mooring anchor leg easily occurs damaging phenomenon.Once there is badly damaged will replacing whole piece anchor leg, the replacing of anchor leg needs to carry out tensioning to the suction anchor on anchor leg, whether to check suction anchor to be held under design tension force, and the stretching anchor chain that lays or anchor hawser are to determine to lay the actual distance of end to suction anchor center-point.
Floating Production storage unload oil tanker normally produce time, with APL (AmericanPresidentLines, US President's steamer) the anchor leg of single buoy mooring system of company is example, the mode of its tensioning is: be connected with anchor leg to be tensioned and old anchor leg respectively by mechanical tensioning instrument, by carrying out tensioning operation to mechanical tensioning instrument, realize the tensioning of anchor leg.This anchor leg tensioning method completes tensioning operation under water by mechanical tensioning instrument, therefore there is following shortcoming: the deadweight one, due to mechanical tensioning instrument is larger, under water to the installation of this mechanical tensioning instrument and removal time long, complete the underwater installation of mechanical tensioner, tensioning and the dismounting needs time of about one day; Two, due to the dynamic flow of seawater, carry out operation easier under water greatly, process and the tensioning degree of tensioning are wayward; Three, stop because operation boats and ships need to keep stable directly over tension points, and its position stopped must be very accurate, therefore high to operation boats and ships performance requriements.
Summary of the invention
The technical problem to be solved in the present invention is, for the defect of prior art, provide a kind of tensioning method of mooring anchor leg, described tensioning method is implemented on the water surface, simple, and efficiency is higher.
The technical solution adopted for the present invention to solve the technical problems is: a kind of tensioning method of mooring anchor leg, and the tensioning method of described mooring anchor leg comprises the following steps:
Install the suction anchor of described anchor leg at suction anchor installation ship, and after having laid the new anchor hawser of described anchor leg, anchor chain installation ship is displaced to described new anchor hawser terminal position, reclaims the rope socket of described new anchor hawser to described anchor chain installation ship;
The two ends of force indicator are connected with described rope socket and winch by working chain by fixing described rope socket respectively;
Described rope socket is put into marine, and fixing described working chain between described force indicator and described winch;
The bow adjusting described anchor chain installation ship is to make the direction initialization of tension direction and described anchor leg in presetting angle;
Along described tension direction, by the horsepower controlling described anchor chain installation ship, tensioning operation is implemented to described anchor leg;
Control described anchor chain installation ship and reduce horsepower, tension force unloading is carried out to described anchor leg.
Preferably, described along described tension direction, by the horsepower controlling described anchor chain installation ship, the step that described anchor leg implements tensioning operation is comprised:
Along described tension direction, described anchor chain installation ship soups until when the tension value that obtains of described force indicator measurement is in default value interval, in the first preset duration, keep described tension value to carry out tensioning to described anchor leg slowly;
Continue the horsepower increasing described anchor chain installation ship, and when the tension value that described force indicator measurement obtains increases pre-set tension value, described anchor chain installation ship is in the second preset duration, described tension value is kept to carry out tensioning to described anchor leg, until when the described tension value that measurement obtains reaches default maximum tension value, described anchor chain installation ship, in the 3rd preset duration, keeps described default maximum tension value to carry out tensioning to described anchor leg.
Preferably, the described suction anchor installing described anchor leg at suction anchor installation ship, and after having laid the new anchor hawser of described anchor leg, anchor chain installation ship is displaced to described new anchor hawser terminal position, the rope socket reclaiming described new anchor hawser comprises to the step of described anchor chain installation ship:
The described suction anchor installing described anchor leg at suction anchor installation ship, and after having laid the new anchor hawser of described anchor leg, described anchor chain installation ship is displaced to described new anchor hawser terminal position, described rope socket is connected respectively loop wheel machine eave tile and winch eave tile, reclaim described rope socket to described anchor chain installation ship by loop wheel machine and drawing high of winch.
Preferably, described described rope socket is connected loop wheel machine eave tile and winch eave tile respectively, reclaims described rope socket to the step of described anchor chain installation ship comprise by drawing high of loop wheel machine and winch:
The winch cable being connected to described winch eave tile is released into described new anchor hawser terminal position;
Connect described winch eave tile and described rope socket, draw high described rope socket to the position lower than sea level predeterminable range with described winch;
Described rope socket is connected on the described loop wheel machine eave tile of loop wheel machine steel rope, reclaims described rope socket to described anchor chain installation ship by described loop wheel machine and drawing high of described winch.
Preferably, described rope socket comprises: hanger and pin shaft hole, described hanger has been connected by buckle ring-like suspender belt, for being connected with described loop wheel machine eave tile, described pin shaft hole is connected with rigging, for being connected with described winch eave tile, described rigging is also provided with ball float, described ball float plays mark action.
Preferably, the step of described fixing described rope socket comprises:
Described rope socket is moved to the position near shark jaw;
Drawn below a protective device to described rope socket by hauling rope, and described rope socket is put into described protective device;
Rise described shark jaw, and slowly loosen described hauling rope, fixing between two tong arms making described protective device slide to described shark jaw.
Preferably, described the step that the two ends of force indicator are connected with described rope socket and winch respectively by working chain to be comprised:
Untie the connection of described rope socket and described loop wheel machine eave tile and described winch eave tile respectively, described force indicator two ends are connected a working chain respectively, be connected with described winch by the described working chain of described force indicator one end, the described working chain of the other end is connected with described rope socket by the shackle of D type.
Preferably, described described rope socket is put into marine, and the step of fixing described working chain between described force indicator and described winch comprises:
The hanger of described rope socket is arranged the loop wheel machine rigging of a suitable length, in order to be connected with described loop wheel machine steel rope, utilizes described loop wheel machine to sling described rope socket put into marine;
Remove described protective device, fix the described working chain between described force indicator and described winch with described shark jaw.
Preferably, the described suction anchor installing described anchor leg at suction anchor installation ship, and after having laid the new anchor hawser of described anchor leg, anchor chain installation ship is displaced to described new anchor hawser terminal position, the rope socket reclaiming described new anchor hawser to described anchor chain installation ship step before comprise:
The stern unloading oil tanker in Floating Production storage arranges several spacing tugboats, and bow Floating Production being stored up unload oil tanker is to just to pending anchor leg.
Preferably, the described anchor chain installation ship of described control reduces horsepower, comprises after carrying out the step of tension force unloading to described anchor leg:
Reclaim and fix described rope socket to described anchor chain installation ship, removing described dynamometry and take into account described working chain.
The present invention installs the suction anchor of described anchor leg at suction anchor installation ship, and after having laid the new anchor hawser of described anchor leg, anchor chain installation ship is displaced to described new anchor hawser terminal position, reclaims the rope socket of described new anchor hawser to described anchor chain installation ship; The two ends of force indicator are connected with described rope socket and winch by working chain by fixing described rope socket respectively; Described rope socket is put into marine, and fixing described working chain between described force indicator and described winch; The bow adjusting described anchor chain installation ship is to make the direction initialization of tension direction and described anchor leg in presetting angle; Along described tension direction, by the horsepower controlling described anchor chain installation ship, tensioning operation is implemented to described anchor leg; Control described anchor chain installation ship and reduce horsepower, tension force unloading is carried out to described anchor leg.The tensioning operation of the present invention to anchor leg is implemented on the water surface by anchor chain installation ship, and does not need to install mechanical tightener under water, therefore, reduces the operation of underwater Assembly &Disassembly, reduces the difficulty of operation, and decrease the operating time, improve efficiency; In addition, in whole tensioning process, oil tanker is unloaded in Floating Production storage not to be needed to free, and therefore, does not affect it and normally produces.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is mooring anchor system of the present invention schematic diagram;
Fig. 2 is the schematic diagram that anchor chain installation ship of the present invention is displaced to new anchor hawser end;
Fig. 3 is the schematic diagram of messenger return line joint of the present invention;
Fig. 4 is rope socket structural representation of the present invention;
Fig. 5 is the schematic diagram of preventer joint of the present invention;
Fig. 6 is force indicator connection diagram of the present invention;
Fig. 7 is the schematic diagram that rope socket of the present invention puts into water;
Fig. 8 is the schematic diagram of tensioning anchor leg of the present invention.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
The invention provides a kind of tensioning method of mooring anchor leg.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 5, Fig. 6, Fig. 7, Fig. 8, in the first embodiment of the invention, the tensioning method of described mooring anchor leg comprises the following steps:
Step S10, the suction anchor 2 of described anchor leg 1 is installed in suction anchor installation ship (not shown), and after having laid the new anchor hawser 3 of described anchor leg 1, anchor chain installation ship 4 is displaced to described new anchor hawser 3 terminal position, reclaim the rope socket 5 of described new anchor hawser 3 to described anchor chain installation ship 4;
With reference to Fig. 2, suction anchor installation ship installs the suction anchor 2 of anchor leg 1, and after laying the new anchor hawser 3 of this anchor leg 1, sail out of suction anchor 2 position of this new installation, anchor chain installation ship 4 shift value new anchor hawser 3 terminal position, wherein, the terminal position of new anchor hawser 3 is provided with rope socket 5, rope socket 5 lift can be recycled to the deck of anchor chain installation ship 4 by the equipment such as choice for use loop wheel machine, winch.
Step S20, the two ends of force indicator 6 are connected with described rope socket 5 and winch (not shown) by working chain 7 by fixing described rope socket 5 respectively;
With reference to Fig. 5 and Fig. 6, after rope socket 5 is recycled to anchor chain installation ship 4, rope socket 5 is fixed on anchor chain installation ship 4 (as deck), the two ends of force indicator 6 are connected respectively at rope socket 5 and winch by working chain 7.Wherein, working chain 7 plays connection function, the material of any appropriate such as metal bracelet, nylon rope can be selected to serve as working chain 7, and the model of winch, type, load capacity can be selected according to the needs of operator, as 500T winch, the present embodiment is not construed as limiting this.
Step S30, puts into marine by described rope socket 5, and fixing described working chain 7 between described force indicator 6 and described winch;
With reference to Fig. 7, the rope socket 5 being connected to force indicator 6 is put into marine, and by fixing working chain 7 between force indicator 6 and winch, thus realize fixing new anchor hawser 3.
Step S40, the bow adjusting described anchor chain installation ship 4 is to make the direction initialization of tension direction and described anchor leg 1 in presetting angle;
Step S50, along described tension direction, implements tensioning operation by the horsepower controlling described anchor chain installation ship 4 to described anchor leg 1;
With reference to Fig. 1 and Fig. 8, operator can need the horsepower of the pulling force setting anchor chain installation ship 4 be tensioned according to anchor leg 1 and maintain the time of this horsepower, implements tensioning operation in this, as tensioning scheme to anchor leg 1.Wherein, anchor chain installation ship 4 should reach the requirement of horsepower in tensioning scheme.
Step S60, controls described anchor chain installation ship 4 and reduces horsepower, carries out tension force unloading to described anchor leg 1.
In the present embodiment, the tensioning operation of anchor leg 1 is implemented by anchor chain installation ship 4 on the water surface, and does not need mechanical tightener is installed under water, therefore, reduce the operation of underwater Assembly &Disassembly, reduce the difficulty of operation, and decrease the operating time, improve efficiency; In addition, in whole tensioning process, oil tanker 8 (calling FPSO8 in the following text) is unloaded in Floating Production storage not to be needed to free, and therefore, does not affect it and normally produces.
As shown in Figure 1, in second embodiment of the invention, the present embodiment, on the basis of the first embodiment, comprises before described step S10:
Step S00, the stern unloading oil tanker 8 in Floating Production storage arranges several spacing tugboats 9, and bow Floating Production being stored up unload oil tanker 8 is to just to pending anchor leg 1.
Anchor system with reference to Fig. 1, STP type single buoy mooring system mostly is 9 legs, is divided into 3 bunches, 120 degree, interval between each bunch, every bunch of 3 anchor legs 1,5 degree, interval between two adjacent anchor legs 1 of same bunch.By the rotation of spacing tugboat 9 control FPSO8 under wind, wave, stream effect, thus realize to FPSO8 bow to adjustment, when the bow of FPSO8 is to during just to pending anchor leg 1, the tension force on this pending anchor leg 1 can be reduced accordingly, so that to the tensioning operation of this anchor leg 1 in subsequent step, in addition, when the bow of FPSO8 is to during just to pending anchor leg 1, the safety of tensioning operation, away from the operating area of anchor chain installation ship 4, is improved in the moving region of FPSO8.In tensioning operation process, also can formulate spacing watchdog routine and expeditious measures safely and effectively, guarantee the safety of construction ship.
It should be noted that, three spacing tugboats 9 are illustrated altogether in Fig. 1, comprise a spacing tugboat 9 of master and two auxiliary stopper tugboats 9, and the present embodiment does not limit the quantity of spacing tugboat 9 and horsepower, operator can select quantity and the horsepower of spacing tugboat 9 as required, usually unload the size of oil tanker 8, the impact of stormy waves stream, the impact of interior wave current and handling quantity and the horsepower determining described spacing tugboat 9 of tugboat according to the storage of described Floating Production, to make spacing tugboat 9 can resist environmental concerns, accurate control is realized to FPSO8.
As shown in Figure 2 and Figure 3, in third embodiment of the invention, the present embodiment is on the basis of the first embodiment, the second embodiment, and described step S10 comprises:
The described suction anchor 2 installing described anchor leg 1 at suction anchor installation ship, and after having laid the new anchor hawser 3 of described anchor leg 1, described anchor chain installation ship 4 is displaced to described new anchor hawser 3 terminal position, described rope socket 5 is connected loop wheel machine eave tile 10 and winch eave tile 11 respectively, reclaims described rope socket 5 to described anchor chain installation ship 4 by loop wheel machine (not shown) and drawing high of winch (not shown).
Compared to only using loop wheel machine, or only use winch to draw high messenger return line joint 5, the mode messenger return line joint 5 that the present embodiment adopts loop wheel machine and winch to coordinate, be conducive to stable and flexibly control cord joint 5 draw high process.
As shown in Figure 3, in fourth embodiment of the invention, described rope socket 5, on the basis of the 3rd embodiment, is describedly connected loop wheel machine eave tile 10 and winch eave tile 11 by the present embodiment respectively, is reclaimed described rope socket 5 to the step of described anchor chain installation ship 4 comprised by drawing high of loop wheel machine and winch:
The winch cable 12 being connected to described winch eave tile 11 is released into described new anchor hawser 3 terminal position;
Connect described winch eave tile 11 and described rope socket 5, draw high described rope socket 5 to the position lower than sea level predeterminable range with described winch;
Described rope socket 5 is connected on the described loop wheel machine eave tile 10 of loop wheel machine steel rope 13, reclaims described rope socket 5 to described anchor chain installation ship 4 by described loop wheel machine and drawing high of described winch.
The connection of above-mentioned winch eave tile 11 and rope socket 5, and loop wheel machine eave tile 10 can adopt rigging or suspender belt etc. as attaching parts with the connection of rope socket 5.Can adopt under-water robot or diver that rope socket 5 is connected to winch eave tile 11 and loop wheel machine eave tile 10 respectively, when adopting under-water robot to carry out connection work, loop wheel machine eave tile 10 and winch eave tile 11 need adopt special ROV (RemoteOperatedVehicle, unmanned remotely controlled submersible vehicle) eave tile.Rope socket 5 is drawn high to the position lower than sea level predeterminable range with winch, wherein, predeterminable range can set according to demand, is connected on the loop wheel machine eave tile 10 of loop wheel machine steel rope 13 by rope socket 5 in this position, then draws high messenger return line joint 5 by the mode that loop wheel machine and winch coordinate.
In the present embodiment, loop wheel machine draws high rope socket 5 and avoids rope socket 5 when arriving the stern of anchor chain installation ship 4, and rope socket 5 and stern collide or link; Using winch to coordinate and draw high rope socket 5, at rope socket 5 higher than providing a horizontal pull when sea level and deck, the auxiliary effect drawn high can be played.
As shown in Figure 3, Figure 4, in fifth embodiment of the invention, the present embodiment is on the basis of the 4th embodiment, described rope socket 5 comprises: hanger 51 and pin shaft hole 52, and described hanger 51 has been connected by buckle ring-like suspender belt 53, for being connected with described loop wheel machine eave tile 10, described pin shaft hole 52 is connected with rigging 54, for being connected with described winch eave tile 11, described rigging 54 is also provided with ball float 55, described ball float 55 plays mark action.
Wherein, shackle can use the shackle or the shackle of H type etc. of D type, and the present embodiment is not restricted.And the ball float 55 that rigging 54 is arranged, being conducive to under-water robot when implementing connection work, more easily finding the position of rigging 54.
The structure of the rope socket 5 of the present embodiment can meet rope socket 5 and connect loop wheel machine eave tile 10 and winch eave tile 11 simultaneously, thus the mode that can realize being coordinated by loop wheel machine and winch draws high messenger return line joint 5, and this structure facilitates under-water robot enforcement connection work.
As shown in Figure 5, in sixth embodiment of the invention, the present embodiment is on the basis of above-described embodiment, and in step S20, the step of described fixing described rope socket 5 comprises:
Step S21, moves to the position near shark jaw 14 by described rope socket 5;
Rope socket 5 should be in the side of shark jaw 14 near winch.
Step S22, is drawn below a protective device 15 to described rope socket 5 by hauling rope, and described rope socket 5 is put into described protective device 15;
Step S23, rises described shark jaw 14, and slowly loosens described hauling rope, fixing between two tong arms making described protective device 15 slide to described shark jaw 14.
Wherein, protective device 15 plays the effect of protection rope socket 5, avoids rope socket 5 to be subject to the damage of shark jaw 14, prevents in follow-up use procedure, the erosion cannot resisting seawater and the tension force self born.This protective device 15 can be normally used kennel (DogHouse), also can be other alternative devices.In addition, above-mentioned hauling rope can be connected on winch, by winch pulling traction rope.
Except the mode of above-mentioned preventer joint 5, also can select any suitable mode preventer joint 5, the present embodiment is not construed as limiting.
As shown in Figure 5, Figure 6, in seventh embodiment of the invention, the present embodiment is on the basis of the 3rd embodiment, the 4th embodiment, the 5th embodiment and the 6th embodiment, in step S20, described the step that the two ends of force indicator 6 are connected with described rope socket 5 and winch respectively by working chain 7 to be comprised:
Step S24, untie the connection of described rope socket 5 and described loop wheel machine eave tile 10 and described winch eave tile 11 respectively, described force indicator 6 two ends are connected a working chain 7 respectively, be connected with described winch by the described working chain 7 of described force indicator 6 one end, the described working chain 7 of the other end is connected with described rope socket 5 by D type shackle 16.
Wherein, D type shackle 16 can be substituted by other shackles such as H type shackles, and the advantage of D type shackle 16 is for convenience of dismounting.
As shown in Figure 7, in eighth embodiment of the invention, the present embodiment is on the basis of above-described embodiment, and described step S30 comprises:
Step S31, the hanger 51 of described rope socket 5 is arranged the loop wheel machine rigging of a suitable length, in order to be connected with described loop wheel machine steel rope 13, utilizes described loop wheel machine to sling described rope socket 5 put into marine;
Except use loop wheel machine is sling except the method for rope socket 5, rope socket 5 is put into marine by the method that also available loop wheel machine coordinates with winch, and the present embodiment is not restricted.
Step S32, removes described protective device 15, fixes the described working chain 7 between described force indicator 6 and described winch with described shark jaw 14.
Except using the mode of shark jaw 14 steady job chain 7, also can use any suitable device steady job chain 7.
As shown in Fig. 1, Fig. 8, in ninth embodiment of the invention, the present embodiment is on the basis of above-described embodiment, and described step S50 comprises:
Step S51, along described tension direction, described anchor chain installation ship 4 soup slowly until described force indicator 6 measure the tension value that obtains in default value interval time, in the first preset duration, keep described tension value to carry out tensioning to described anchor leg 1;
Step S52, continue the horsepower increasing described anchor chain installation ship 4, and when described force indicator 6 measures the tension value increase pre-set tension value obtained, described anchor chain installation ship 4 is in the second preset duration, described tension value is kept to carry out tensioning to described anchor leg 1, until when the described tension value that measurement obtains reaches default maximum tension value, described anchor chain installation ship 4, in the 3rd preset duration, keeps described default maximum tension value to carry out tensioning to described anchor leg 1.
Before execution above-mentioned steps, tensioning scheme need be formulated, namely set above-mentioned default value interval, pre-set tension value, preset maximum tension value, the first preset duration, the second preset duration and the 3rd preset duration, these parameters need need the factors such as the pulling force be tensioned to set according to the length of the length of anchor leg 1 and weight, anchor chain and weight, anchor leg 1.Such as, set the first preset duration and the second preset duration is 5 minutes, the 3rd preset duration is half an hour.
In addition, between tensioning operational period, personnel activity is forbidden on deck, and professional on the quarter safety zone uses force indicator metering device to record tension value.
As shown in Figure 8, in tenth embodiment of the invention, the present embodiment, on the basis of above-described embodiment, comprises after step S60:
Step S70, reclaims and fixes described rope socket 5 to described anchor chain installation ship 4, removing described force indicator 6 and described working chain 7.
Messenger return line joint 5 to protective device 15, then, draws protective device 15 between shark jaw 14 liang of tong arms fixing, finally, removes force indicator 6 and working chain 7, complete the tensioning operation of anchor leg 1.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification sheets of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a tensioning method for mooring anchor leg, is characterized in that, the tensioning method of described mooring anchor leg comprises the following steps:
Install the suction anchor of described anchor leg at suction anchor installation ship, and after having laid the new anchor hawser of described anchor leg, anchor chain installation ship is displaced to described new anchor hawser terminal position, reclaims the rope socket of described new anchor hawser to described anchor chain installation ship;
The two ends of force indicator are connected with described rope socket and winch by working chain by fixing described rope socket respectively;
Described rope socket is put into marine, and fixing described working chain between described force indicator and described winch;
The bow adjusting described anchor chain installation ship is to make the direction initialization of tension direction and described anchor leg in presetting angle;
Along described tension direction, by the horsepower controlling described anchor chain installation ship, tensioning operation is implemented to described anchor leg;
Control described anchor chain installation ship and reduce horsepower, tension force unloading is carried out to described anchor leg.
2. the tensioning method of mooring anchor leg according to claim 1, is characterized in that, described along described tension direction, is comprised the step that described anchor leg implements tensioning operation by the horsepower controlling described anchor chain installation ship:
Along described tension direction, described anchor chain installation ship soups until when the tension value that obtains of described force indicator measurement is in default value interval, in the first preset duration, keep described tension value to carry out tensioning to described anchor leg slowly;
Continue the horsepower increasing described anchor chain installation ship, and when the tension value that described force indicator measurement obtains increases pre-set tension value, described anchor chain installation ship is in the second preset duration, described tension value is kept to carry out tensioning to described anchor leg, until when the described tension value that measurement obtains reaches default maximum tension value, described anchor chain installation ship, in the 3rd preset duration, keeps described default maximum tension value to carry out tensioning to described anchor leg.
3. the tensioning method of mooring anchor leg according to claim 1 and 2, it is characterized in that, the described suction anchor installing described anchor leg at suction anchor installation ship, and after having laid the new anchor hawser of described anchor leg, anchor chain installation ship is displaced to described new anchor hawser terminal position, and the rope socket reclaiming described new anchor hawser comprises to the step of described anchor chain installation ship:
The described suction anchor installing described anchor leg at suction anchor installation ship, and after having laid the new anchor hawser of described anchor leg, described anchor chain installation ship is displaced to described new anchor hawser terminal position, described rope socket is connected respectively loop wheel machine eave tile and winch eave tile, reclaim described rope socket to described anchor chain installation ship by loop wheel machine and drawing high of winch.
4. the tensioning method of mooring anchor leg according to claim 3, is characterized in that, described described rope socket is connected loop wheel machine eave tile and winch eave tile respectively, is reclaimed described rope socket to the step of described anchor chain installation ship comprised by drawing high of loop wheel machine and winch:
The winch cable being connected to described winch eave tile is released into described new anchor hawser terminal position;
Connect described winch eave tile and described rope socket, draw high described rope socket to the position lower than sea level predeterminable range with described winch;
Described rope socket is connected on the described loop wheel machine eave tile of loop wheel machine steel rope, reclaims described rope socket to described anchor chain installation ship by described loop wheel machine and drawing high of described winch.
5. the tensioning method of mooring anchor leg according to claim 4, it is characterized in that, described rope socket comprises: hanger and pin shaft hole, described hanger has been connected by buckle ring-like suspender belt, for being connected with described loop wheel machine eave tile, described pin shaft hole is connected with rigging, for being connected with described winch eave tile, described rigging is also provided with ball float, and described ball float plays mark action.
6. the tensioning method of the mooring anchor leg according to claim 1,2,4 or 5, is characterized in that, the step of described fixing described rope socket comprises:
Described rope socket is moved to the position near shark jaw;
Drawn below a protective device to described rope socket by hauling rope, and described rope socket is put into described protective device;
Rise described shark jaw, and slowly loosen described hauling rope, fixing between two tong arms making described protective device slide to described shark jaw.
7. the tensioning method of mooring anchor leg according to claim 3, is characterized in that, describedly the step that the two ends of force indicator are connected with described rope socket and winch respectively by working chain is comprised:
Untie the connection of described rope socket and described loop wheel machine eave tile and described winch eave tile respectively, described force indicator two ends are connected a working chain respectively, be connected with described winch by the described working chain of described force indicator one end, the described working chain of the other end is connected with described rope socket by the shackle of D type.
8. the tensioning method of the mooring anchor leg according to claim 1,4,5 or 7, is characterized in that, describedly puts into marine by described rope socket, and the step of fixing described working chain between described force indicator and described winch comprises:
The hanger of described rope socket is arranged the loop wheel machine rigging of a suitable length, in order to be connected with described loop wheel machine steel rope, utilizes described loop wheel machine to sling described rope socket put into marine;
Remove described protective device, fix the described working chain between described force indicator and described winch with described shark jaw.
9. the tensioning method of the mooring anchor leg according to claim 1,2,4,5 or 7, it is characterized in that, the described suction anchor installing described anchor leg at suction anchor installation ship, and after having laid the new anchor hawser of described anchor leg, anchor chain installation ship is displaced to described new anchor hawser terminal position, the rope socket reclaiming described new anchor hawser to described anchor chain installation ship step before comprise:
The stern unloading oil tanker in Floating Production storage arranges several spacing tugboats, and bow Floating Production being stored up unload oil tanker is to just to pending anchor leg.
10. the tensioning method of the mooring anchor leg according to claim 1,2,4,5 or 7, is characterized in that, the described anchor chain installation ship of described control reduces horsepower, comprises after carrying out the step of tension force unloading to described anchor leg:
Reclaim and fix described rope socket to described anchor chain installation ship, removing described dynamometry and take into account described working chain.
Priority Applications (1)
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| WO2019078725A1 (en) * | 2017-10-16 | 2019-04-25 | Apl Technology As | System and method for connecting a mooring line to a body |
| CN110697001A (en) * | 2019-11-04 | 2020-01-17 | 中国科学院海洋研究所 | Recovery device and recovery method of seabed-based observation system without release function |
| CN110844003A (en) * | 2019-01-28 | 2020-02-28 | 深圳海油工程水下技术有限公司 | Method for replacing mooring anchor legs by lifting double ships |
| CN112224337A (en) * | 2020-09-07 | 2021-01-15 | 中海石油(中国)有限公司深圳分公司 | Deepwater anchor system connecting plate auxiliary tool |
| CN117622383A (en) * | 2024-01-25 | 2024-03-01 | 中海油能源发展股份有限公司采油服务分公司 | Large-tension mooring anchor leg dragging pre-tensioning method |
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| WO2019078725A1 (en) * | 2017-10-16 | 2019-04-25 | Apl Technology As | System and method for connecting a mooring line to a body |
| GB2581285A (en) * | 2017-10-16 | 2020-08-12 | Apl Tech As | System and method for connecting a mooring line to a body |
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| CN110844003A (en) * | 2019-01-28 | 2020-02-28 | 深圳海油工程水下技术有限公司 | Method for replacing mooring anchor legs by lifting double ships |
| CN110697001A (en) * | 2019-11-04 | 2020-01-17 | 中国科学院海洋研究所 | Recovery device and recovery method of seabed-based observation system without release function |
| CN110697001B (en) * | 2019-11-04 | 2023-12-01 | 中国科学院海洋研究所 | Recovery device and recovery method of seabed-based observation system without release function |
| CN112224337A (en) * | 2020-09-07 | 2021-01-15 | 中海石油(中国)有限公司深圳分公司 | Deepwater anchor system connecting plate auxiliary tool |
| CN117622383A (en) * | 2024-01-25 | 2024-03-01 | 中海油能源发展股份有限公司采油服务分公司 | Large-tension mooring anchor leg dragging pre-tensioning method |
| CN117622383B (en) * | 2024-01-25 | 2024-05-10 | 中海油能源发展股份有限公司采油服务分公司 | Large-tension mooring anchor leg dragging pre-tensioning method |
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Address after: 4th Floor, Main Building, Science and Technology Building, No. 1067 Nanhai Avenue, Nanshan District, Shenzhen City, Guangdong Province, 518067 Patentee after: CNOOC Shenzhen Ocean Engineering Technology Service Co.,Ltd. Address before: 4th Floor, Main Building, Science and Technology Building, No. 1067 Nanhai Avenue, Nanshan District, Shenzhen City, Guangdong Province, 518067 Patentee before: COOEC SUBSEA TECHNOLOGY Co.,Ltd. |