CN105398545B - A kind of tensioning method of mooring anchor leg - Google Patents
A kind of tensioning method of mooring anchor leg Download PDFInfo
- Publication number
- CN105398545B CN105398545B CN201510828010.9A CN201510828010A CN105398545B CN 105398545 B CN105398545 B CN 105398545B CN 201510828010 A CN201510828010 A CN 201510828010A CN 105398545 B CN105398545 B CN 105398545B
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- China
- Prior art keywords
- anchor
- installation ship
- winch
- rope slocket
- leg
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Classifications
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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
-
- 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
Abstract
The invention discloses a kind of tensioning method of mooring anchor leg, this method includes：The suction anchor of anchor leg is installed in suction anchor installation ship, and has been laid with after the new anchor hawser of anchor leg, anchor chain installation ship is displaced to new anchor hawser terminal position, recycles the rope slocket of new anchor hawser to anchor chain installation ship；Fixed rope slocket, the both ends of dynamometer are connected by working chain with rope slocket and winch respectively；Rope slocket is put into marine, and the working chain between fixed dynamometer and winch；The bow of anchor chain installation ship is adjusted to so that the direction initialization of tension direction and anchor leg is in default angle；Along tension direction, tensioning operation implements anchor leg by the horsepower for controlling anchor chain installation ship；Anchor chain installation ship is controlled to reduce horsepower, tension unloading is carried out to anchor leg.The anchor leg tensioning method of the present invention is implemented on the water surface, simple and practicable and more efficient.
Description
Technical field
The present invention relates to Offshore Engineering field more particularly to a kind of tensioning methods of mooring anchor leg.
Background technology
At present, inner cupola formula single point mooring system (STP, Submerged Turret Production) is a kind of extensive
The single-point of oil tanker (FPSO, Floating Production Storage and Offloading) is unloaded applied to Floating Production storage
Anchoring system.After field facility comes into operation, by operation for many years, mooring anchor leg is susceptible to damage phenomenon.Once occur
Badly damaged that whole anchor leg will be replaced, the replacement of anchor leg needs to be tensioned the suction anchor on anchor leg, to examine
Whether suction anchor is held in the case where designing tension, and stretches the anchor chain laid or anchor hawser to determine to be laid with end into suction anchor
The actual range of heart point.
Oil tanker is unloaded in Floating Production storage during normal production, with APL (American President Lines, US President
Steamer) company single point mooring system anchor leg exemplified by, tensioning mode be：By mechanical tensioning instrument respectively with it is to be tensioned
Anchor leg and the connection of old anchor leg by carrying out tensioning operation to mechanical tensioning instrument, realize the tensioning of anchor leg.The anchor leg tensioning method is
It completes tensioning operation under water by mechanical tensioning instrument, therefore has the following disadvantages：First, due to mechanical tensioning instrument from
Weight is larger, long to the installation and take-down time of the mechanical tensioning instrument under water, completes the underwater installation of mechanical tensioner, opens
Tight and dismounting needs the time of one day or so；2nd, since the dynamic of seawater flows, progress operation difficulty is big under water, tensioning
Process and tensioning degree are difficult to control；3rd, since operation ship needs to keep stablizing in the surface of tension points to stop, and it stops
The position stayed must be very accurate, therefore high to operation ship performance requirement.
The content of the invention
The technical problem to be solved in the present invention is, the defects of for the prior art, provides a kind of tensioning of mooring anchor leg
Method, the tensioning method is implemented on the water surface, simple and practicable, and more efficient.
The technical solution adopted by the present invention to solve the technical problems is：A kind of tensioning method of mooring anchor leg, the system
The tensioning method of pool anchor leg comprises the following steps：
The suction anchor of the anchor leg is installed in suction anchor installation ship, and has been laid with after the new anchor hawser of the anchor leg, anchor
Chain installation ship is displaced to the new anchor hawser terminal position, recycles the rope slocket of the new anchor hawser to the anchor chain installation ship；
The fixed rope slocket, the both ends of dynamometer are connected by working chain with the rope slocket and winch respectively；
The rope slocket is put into marine, and the working chain between the fixed dynamometer and the winch；
The bow of the anchor chain installation ship is adjusted to so that the direction initialization of tension direction and the anchor leg is in default angle；
Along the tension direction, tensioning operation implements the anchor leg by the horsepower for controlling the anchor chain installation ship；
The anchor chain installation ship is controlled to reduce horsepower, tension unloading is carried out to the anchor leg.
Preferably, it is described along the tension direction, the anchor leg is implemented by the horsepower for controlling the anchor chain installation ship
The step of being tensioned operation includes：
Along the tension direction, the anchor chain installation ship slowly soups until that the dynamometer measurement obtains
When force value is in default value section, in the first preset duration, the tension value is kept to be tensioned the anchor leg；
Continue to increase the horsepower of the anchor chain installation ship, and whenever the tension value that the dynamometer measurement obtains increase it is default
During tension value, the anchor chain installation ship keeps the tension value to be tensioned the anchor leg in the second preset duration, until
When the tension value that measurement obtains reaches default maximum tension value, the anchor chain installation ship is kept in the 3rd preset duration
The default maximum tension value is tensioned the anchor leg.
Preferably, it is described to install the suction anchor of the anchor leg in suction anchor installation ship, and it has been laid with the new of the anchor leg
After anchor hawser, anchor chain installation ship is displaced to the new anchor hawser terminal position, recycles the rope slocket of the new anchor hawser to the anchor chain
The step of installation ship, includes：
It is described to install the suction anchor of the anchor leg in suction anchor installation ship, and be laid with the anchor leg new anchor hawser it
Afterwards, the anchor chain installation ship is displaced to the new anchor hawser terminal position, and the rope slocket is connected loop wheel machine eave tile and winch respectively
Eave tile recycles the rope slocket to the anchor chain installation ship by loop wheel machine and drawing high for winch.
Preferably, it is described that the rope slocket is connected into loop wheel machine eave tile and winch eave tile respectively, pass through the drawing of loop wheel machine and winch
Rising the recycling rope slocket to the step of anchor chain installation ship includes：
The winch cable for being connected to the winch eave tile is discharged to the new anchor hawser terminal position；
The winch eave tile and the rope slocket are connected, the rope slocket is drawn high with the winch and is extremely preset less than sea level
At the position of distance；
The rope slocket is connected on the loop wheel machine eave tile of loop wheel machine steel wire rope, passes through the loop wheel machine and the winch
The recycling rope slocket is drawn high to the anchor chain installation ship.
Preferably, the rope slocket includes：Lifting lug and pin shaft hole have been connected by buckle ring-like hang on the lifting lug
For being connected with the loop wheel machine eave tile, rigging is connected on the pin shaft hole for band, for being connected with the winch eave tile, institute
It states and floating ball is additionally provided on rigging, the floating ball plays mark action.
Preferably, the step of fixation rope slocket includes：
The rope slocket is moved to close to the position of shark jaw；
By drawing below one protective device of wire saws to the rope slocket, and the rope slocket is put into the protection and is filled
In putting；
The shark jaw is risen, and slowly loosens the traction rope, the protective device is made to slide to the two of the shark jaw
It is fixed between tong arm.
Preferably, the step of both ends by dynamometer are connected by working chain with the rope slocket and winch respectively is wrapped
It includes：
The connection of the rope slocket and the loop wheel machine eave tile and the winch eave tile is unlocked respectively, by the dynamometer both ends
A working chain is connected respectively, and the working chain of described dynamometer one end is connected with the winch, the work of the other end
Chain is connected by the shackle of D types with the rope slocket.
Preferably, it is described the rope slocket is put into it is marine and described between the fixed dynamometer and the winch
The step of working chain, includes：
The loop wheel machine rigging of a suitable length is arranged on the lifting lug of the rope slocket, to connect with the loop wheel machine steel wire rope
It connects, the rope slocket is sling using the loop wheel machine and is put into marine；
The protective device is removed, the work between the dynamometer and the winch is fixed with the shark jaw
Chain.
Preferably, it is described to install the suction anchor of the anchor leg in suction anchor installation ship, and it has been laid with the new of the anchor leg
After anchor hawser, anchor chain installation ship is displaced to the new anchor hawser terminal position, recycles the rope slocket of the new anchor hawser to the anchor chain
Include before the step of installation ship：
The stern of oil tanker is unloaded in Floating Production storage and arranges several /V tugboats, and Floating Production storage is made to unload the bow of oil tanker to face
Pending anchor leg.
Preferably, the step of control anchor chain installation ship reduces horsepower, tension unloading is carried out to the anchor leg it
After include：
It recycles and fixes the rope slocket to the anchor chain installation ship, remove the dynamometer and the working chain.
The present invention installs the suction anchor of the anchor leg in suction anchor installation ship, and be laid with the anchor leg new anchor hawser it
Afterwards, anchor chain installation ship is displaced to the new anchor hawser terminal position, recycles the rope slocket of the new anchor hawser to the anchor chain installation ship；
The fixed rope slocket, the both ends of dynamometer are connected by working chain with the rope slocket and winch respectively；The rope is connect
Head is put into marine, and the working chain between the fixed dynamometer and the winch；Adjust the bow of the anchor chain installation ship
To so that the direction initialization of tension direction and the anchor leg is in default angle；Along the tension direction, by controlling the anchor chain
The horsepower of installation ship implements the anchor leg tensioning operation；The anchor chain installation ship is controlled to reduce horsepower, the anchor leg is carried out
Tension unloads.The present invention is implemented the tensioning operation of anchor leg by anchor chain installation ship on the water surface, without installing machinery under water
Therefore tightener, reduces underwater installation and removal operation, reduces the difficulty of operation, and reduces the operating time, carry
High efficiency；In addition, during entire tensioning, Floating Production storage unloads oil tanker and is not required to free, and therefore, it is normal raw not to influence it
Production.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the invention will be further described, in attached 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 present invention recycling rope slocket；
Fig. 4 is rope slocket structure diagram of the present invention；
Fig. 5 is the schematic diagram of the fixed rope slocket of the present invention；
Fig. 6 is dynamometer connection diagram of the present invention；
Fig. 7 is the schematic diagram of rope slocket of the present invention into the water；
Fig. 8 is the schematic diagram of present invention tensioning anchor leg.
Specific embodiment
In order to which the technical features, objects and effects to the present invention are more clearly understood, now compare attached drawing and be described in detail
The specific embodiment of the present invention.
The present 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 mooring anchor leg
Tensioning method comprises the following steps:
Step S10 installs the suction anchor 2 of the anchor leg 1 in suction anchor installation ship (not shown), and has been laid with institute
After the new anchor hawser 3 for stating anchor leg 1, anchor chain installation ship 4 is displaced to 3 terminal position of new anchor hawser, recycles the rope of the new anchor hawser 3
Connector 5 is to the anchor chain installation ship 4；
It with reference to Fig. 2, the suction anchor 2 of suction anchor installation ship installation anchor leg 1, and is laid with after the new anchor hawser 3 of the anchor leg 1, sails
2 position of suction anchor from the new installation, new 3 terminal position of anchor hawser of 4 shift value of anchor chain installation ship, wherein, the end position of new anchor hawser 3
It installs and is equipped with rope slocket 5, may be selected that rope slocket 5 is lifted to the first for being recycled to anchor chain installation ship 4 using equipment such as loop wheel machine, winches
Plate.
Step S20, the fixed rope slocket 5, by the both ends of dynamometer 6 by working chain 7 respectively with the rope slocket 5 and
Winch (not shown) connects；
With reference to Fig. 5 and Fig. 6, after rope slocket 5 is recycled to anchor chain installation ship 4, rope slocket 5 is fixed on anchor chain installation ship
On 4 (such as decks), the both ends of dynamometer 6 are connected by working chain 7 respectively at rope slocket 5 and winch.Wherein, working chain 7 rises
To connection function, any appropriate materials such as metal bracelet, nylon rope can be selected and serve as working chain 7, and the model of winch, class
Type, load capacity can make choice according to the needs of operator, and such as 500T winches, the present embodiment is not construed as limiting this.
The rope slocket 5 is put into marine, and the work between the fixed dynamometer 6 and the winch by step S30
Make chain 7；
With reference to Fig. 7, the rope slocket 5 for being connected to dynamometer 6 is put into marine, and passed through between fixed dynamometer 6 and winch
Working chain 7, so as to fulfill the fixation to new anchor hawser 3.
Step S40 adjusts the bow of the anchor chain installation ship 4 to so that tension direction and the direction initialization of the anchor leg 1 are in
Default angle；
Step S50 along the tension direction, implements to open by the horsepower for controlling the anchor chain installation ship 4 to the anchor leg 1
Tight operation；
With reference to Fig. 1 and Fig. 8, operator can be needed according to anchor leg 1 pulling force that be tensioned setting anchor chain installation ship 4 horsepower and
The time of this horsepower is maintained, implements tensioning operation to anchor leg 1 in this, as tensioning scheme.Wherein, anchor chain installation ship 4 should can reach
The requirement of horsepower in tensioning scheme.
Step S60 controls the anchor chain installation ship 4 to reduce horsepower, and tension unloading is carried out to the 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, without pacifying under water
Therefore installation tool tightener, reduces underwater installation and removal operation, reduces the difficulty of operation, and reduce operation
Time improves efficiency；In addition, during entire tensioning, Floating Production storage unloads oil tanker 8 (calling FPSO8 in the following text) and is not required to free, because
This, does not influence its normal production.
As shown in Figure 1, in second embodiment of the invention, the present embodiment is on the basis of first embodiment, the step
Include before S10：
Step S00, the stern that oil tanker 8 is unloaded in Floating Production storage arrange several /V tugboats 9, and Floating Production storage is made to unload oil tanker
8 bow is to the pending anchor leg 1 of face.
With reference to Fig. 1, the anchor system of STP type single point mooring systems is mostly 9 legs, is divided into 3 clusters, 120 degree is spaced between each cluster, per cluster
3 anchor legs 1, with 5 degree of interval between two adjacent anchor legs 1 of cluster.By /V tugboat 9 FPSO8 is controlled to be acted in wind, wave, stream
Under rotation, so as to fulfill to FPSO8 bows to adjustment, can be corresponding when the bow of FPSO8 is to the pending anchor leg 1 of face
The tension on the pending anchor leg 1 is reduced, in order to the tensioning operation to the anchor leg 1 in subsequent step, in addition, working as FPSO8
Bow to face pending anchor leg 1 when, operating area of the moving region of FPSO8 away from anchor chain installation ship 4, improve tensioning make
The security of industry.In operation process is tensioned, safely and effectively /V monitoring programme and emergency measure can be also formulated, it is ensured that construction
The safety of ship.
It should be noted that illustrating three /V tugboats 9 in Fig. 1 altogether, aided in including a main /V tugboat 9 and two
/V tugboat 9, and the present embodiment does not limit the quantity and horsepower of /V tugboat 9, operator can select as needed
The quantity and horsepower of /V tugboat 9 unload the size of oil tanker 8 generally according to Floating Production storage, stormy waves stream influences, interior wave current shadow
Ring and tugboat it is handling determine the /V tugboat 9 quantity and horsepower so that /V tugboat 9 can resist environment influence and it is right
FPSO8 realizations are accurately controlled.
As shown in Figure 2 and Figure 3, in third embodiment of the invention, the present embodiment is in first embodiment, second embodiment
On the basis of, the step S10 includes：
It is described to install the suction anchor 2 of the anchor leg 1 in suction anchor installation ship, and it has been laid with the new anchor hawser 3 of the anchor leg 1
Afterwards, the anchor chain installation ship 4 is displaced to 3 terminal position of new anchor hawser, and the rope slocket 5 is connected loop wheel machine eave tile 10 respectively
And winch eave tile 11, the rope slocket 5 is recycled to institute by loop wheel machine (not shown) and drawing high for winch (not shown)
State anchor chain installation ship 4.
Compared to loop wheel machine is only used only or only draws high recycling rope slocket 5 using only winch, the present embodiment uses loop wheel machine and strand
The mode of vehicle cooperation recycles rope slocket 5, and be conducive to stable and flexible control rope slocket 5 draws high process.
As shown in figure 3, in fourth embodiment of the invention, the present embodiment is described by institute on the basis of 3rd embodiment
State rope slocket 5 and connect loop wheel machine eave tile 10 and winch eave tile 11 respectively, by loop wheel machine and winch draw high the recycling rope slocket 5 to
The step of anchor chain installation ship 4, includes：
The winch cable 12 for being connected to the winch eave tile 11 is discharged to new 3 terminal position of anchor hawser；
The winch eave tile 11 and the rope slocket 5 are connected, the rope slocket 5 is drawn high to less than sea level with the winch
At the position of pre-determined distance；
The rope slocket 5 is connected on the loop wheel machine eave tile 10 of loop wheel machine steel wire rope 13, by the loop wheel machine and described
Winch draws high the recycling rope slocket 5 to the anchor chain installation ship 4.
Rigging can be used in connection and loop wheel machine eave tile 10 and the connection of rope slocket 5 of the above-mentioned winch eave tile 11 with rope slocket 5
Or suspender belt etc. is used as connector.Underwater robot or diver can be used rope slocket 5 is respectively connected to winch eave tile 11 and is hung
Machine eave tile 10, when being attached work using underwater robot, loop wheel machine eave tile 10 and winch eave tile 11 need to use dedicated ROV
(Remote Operated Vehicle, unmanned remotely controlled submersible vehicle) eave tile.Rope slocket 5 is drawn high to pre- less than sea level with winch
If at the position of distance, wherein, pre-determined distance can be set according to demand, and rope slocket 5 is connected to loop wheel machine steel wire rope in the position
On 13 loop wheel machine eave tile 10, then recycling rope slocket 5 is drawn high by way of loop wheel machine and winch cooperation.
In the present embodiment, when loop wheel machine draws high rope slocket 5 and avoids rope slocket 5 and reach the stern of anchor chain installation ship 4, rope slocket
5 collide or link with stern；Rope slocket 5 is drawn high using winch cooperation, can be provided when rope slocket 5 is higher than sea level and deck
One horizontal pull plays the role of auxiliary and draws high.
As shown in Figure 3, Figure 4, in fifth embodiment of the invention, the present embodiment is described on the basis of fourth embodiment
Rope slocket 5 includes：Lifting lug 51 and pin shaft hole 52 have been connected by buckle ring-like suspender belt 53 on the lifting lug 51, for institute
It states loop wheel machine eave tile 10 to connect, rigging 54 is connected on the pin shaft hole 52, for being connected with the winch eave tile 11, the rope
Floating ball 55 is additionally provided on tool 54, the floating ball 55 plays mark action.
Wherein, shackle or H-type shackle of D types etc. can be used in shackle, and the present embodiment is not restricted.And set on rigging 54
Floating ball 55 is conducive to underwater robot when implementing to connect work, it is easier to find the position of rigging 54.
The structure of the rope slocket 5 of the present embodiment can meet rope slocket 5 while connect loop wheel machine eave tile 10 and winch eave tile 11, from
And can realize and recycling rope slocket 5 is drawn high by way of loop wheel machine and winch cooperation, and the structure facilitates underwater robot implementation
Connect work.
As shown in figure 5, in sixth embodiment of the invention, the present embodiment is on the basis of above-described embodiment, in step S20
In, the step of fixation rope slocket 5, includes：
The rope slocket 5 is moved to close to the position of shark jaw 14 by step S21；
Rope slocket 5 should be at shark jaw 14 close to the one side of winch.
Step S22 by drawing one protective device 15 of wire saws to 5 lower section of rope slocket, and the rope slocket 5 is put
Enter in the protective device 15；
Step S23 rises the shark jaw 14, and slowly loosens the traction rope, and the protective device 15 is made to slide to institute
It states fixed between two tong arms of shark jaw 14.
Wherein, protective device 15 plays the role of protecting rope slocket 5, and rope slocket 5 is avoided to be subject to the damage of shark jaw 14, prevents
Only during follow-up use, the erosion of seawater can not be resisted and itself born tension.The protective device 15 can be usual
The kennel (Dog House) used or other alternative devices.In addition, above-mentioned traction rope can be connected to winch
On, traction rope is pulled by winch.
In addition to the mode of above-mentioned fixed rope slocket 5, any suitable mode also can be selected and fix rope slocket 5, the present embodiment
It is not construed as limiting.
As shown in Figure 5, Figure 6, in seventh embodiment of the invention, the present embodiment is in 3rd embodiment, fourth embodiment,
On the basis of five embodiments and sixth embodiment, in step S20, the both ends by dynamometer 6 by working chain 7 respectively with
The step of rope slocket 5 and winch connect includes：
Step S24 unlocks the connection of the rope slocket 5 and the loop wheel machine eave tile 10 and the winch eave tile 11 respectively, will
6 both ends of dynamometer connect a working chain 7 respectively, and the working chain 7 of described 6 one end of dynamometer and the winch are connected
It connects, the working chain 7 of the other end is connected by D types shackle 16 with the rope slocket 5.
Wherein, the advantages of D types shackle 16 can be substituted in other shackles by H-type shackle etc., D types shackle 16 is for convenience of dismounting.
As shown in fig. 7, in eighth embodiment of the invention, the present embodiment is on the basis of above-described embodiment, the step
S30 includes：
Step S31 arranges the loop wheel machine rigging of a suitable length on the lifting lug 51 of the rope slocket 5, to be hung with described
Machine steel wire rope 13 connects, and slings the rope slocket 5 using the loop wheel machine and is put into marine；
In addition to the method that loop wheel machine is used to sling rope slocket 5, loop wheel machine also can use to be put into rope slocket 5 with the method that winch coordinates
Marine, the present embodiment is not restricted.
Step S32 removes the protective device 15, with the shark jaw 14 fix the dynamometer 6 and the winch it
Between the working chain 7.
In addition to the mode that shark jaw 14 is used to fix working chain 7, any suitable device also can be used to fix working chain 7.
As shown in Fig. 1, Fig. 8, in ninth embodiment of the invention, the present embodiment is described on the basis of above-described embodiment
Step S50 includes：
Step S51, along the tension direction, the anchor chain installation ship 4 slowly soups until the dynamometer 6 is surveyed
When the tension value measured is in default value section, in the first preset duration, keep the tension value to the anchor leg 1 into
Row tensioning；
Step S52 continues to increase the horsepower of the anchor chain installation ship 4, and whenever the dynamometer 6 measures obtained tension
When value increases pre-set tension value, the anchor chain installation ship 4 keeps the tension value to the anchor leg 1 in the second preset duration
It is tensioned, until when the tension value that measurement obtains reaches default maximum tension value, the anchor chain installation ship 4 is pre- the 3rd
If in duration, the default maximum tension value is kept to be tensioned the anchor leg 1.
Before above-mentioned steps are performed, tensioning scheme need to be formulated, that is, set above-mentioned default value section, pre-set tension value,
Default maximum tension value, the first preset duration, the second preset duration and the 3rd preset duration, these parameters need to be according to anchor legs 1
Length and weight, the length of anchor chain and weight, anchor leg 1 need the setting of the factors such as the pulling force being tensioned.For example, setting first is default
Duration and the second preset duration are 5 minutes, and the 3rd preset duration is half an hour.
In addition, during operation is tensioned, personnel activity is forbidden on deck, and on the quarter safety zone uses dynamometer to professional
Meter records tension value.
As shown in figure 8, in tenth embodiment of the invention, the present embodiment on the basis of above-described embodiment, step S60 it
After include：
Step S70, is recycled and the fixed rope slocket 5 is to the anchor chain installation ship 4, removes the dynamometer 6 and described
Working chain 7.
Rope slocket 5 is recycled to protective device 15, then, protective device 15 is drawn to solid between 14 liang of tong arms of shark jaw
It is fixed, finally, dynamometer 6 and working chain 7 are removed, complete the tensioning operation of anchor leg 1.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow shift that bright specification and accompanying drawing content are made directly or indirectly is used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (9)
1. a kind of tensioning method of mooring anchor leg, which is characterized in that the tensioning method of the mooring anchor leg comprises the following steps：
The suction anchor of the anchor leg is installed in suction anchor installation ship, and has been laid with after the new anchor hawser of the anchor leg, anchor chain peace
Shipment is displaced to the new anchor hawser terminal position, recycles the rope slocket of the new anchor hawser to the anchor chain installation ship；
The fixed rope slocket, the both ends of dynamometer are connected by working chain with the rope slocket and winch respectively；
The rope slocket is put into marine, and the working chain between the fixed dynamometer and the winch；
The bow of the anchor chain installation ship is adjusted to so that the direction initialization of tension direction and the anchor leg is in default angle；
Along the tension direction, tensioning operation implements the anchor leg by the horsepower for controlling the anchor chain installation ship；
The anchor chain installation ship is controlled to reduce horsepower, tension unloading is carried out to the anchor leg；
It is described along the tension direction, implement the step of tensioning operation to the anchor leg by the horsepower for controlling the anchor chain installation ship
Suddenly include：
Along the tension direction, the anchor chain installation ship slowly soups until the tension value that the dynamometer measurement obtains
When in default value section, in the first preset duration, the tension value is kept to be tensioned the anchor leg；
Continue to increase the horsepower of the anchor chain installation ship, and whenever the tension value that the dynamometer measurement obtains increases pre-set tension
During value, the anchor chain installation ship keeps the tension value to be tensioned the anchor leg in the second preset duration, until measurement
When the obtained tension value reaches default maximum tension value, the anchor chain installation ship is in the 3rd preset duration, described in holding
Default maximum tension value is tensioned the anchor leg.
2. the tensioning method of mooring anchor leg according to claim 1, which is characterized in that described to be installed in suction anchor installation ship
The suction anchor of the good anchor leg, and be laid with after the new anchor hawser of the anchor leg, anchor chain installation ship is displaced to the new anchor hawser end
End position, recycling rope slocket to the step of anchor chain installation ship of the new anchor hawser includes：
It is described to install the suction anchor of the anchor leg in suction anchor installation ship, and be laid with after the new anchor hawser of the anchor leg, institute
It states anchor chain installation ship and is displaced to the new anchor hawser terminal position, the rope slocket is connected into loop wheel machine eave tile and winch eave tile respectively,
The rope slocket is recycled to the anchor chain installation ship by loop wheel machine and drawing high for winch.
3. the tensioning method of mooring anchor leg according to claim 2, which is characterized in that described to connect the rope slocket respectively
Loop wheel machine eave tile and winch eave tile are connect, the step of rope slocket is to the anchor chain installation ship is recycled by loop wheel machine and drawing high for winch
Including：
The winch cable for being connected to the winch eave tile is discharged to the new anchor hawser terminal position；
The winch eave tile and the rope slocket are connected, the rope slocket is drawn high to less than sea level pre-determined distance with the winch
Position at；
The rope slocket is connected on the loop wheel machine eave tile of loop wheel machine steel wire rope, passes through drawing high for the loop wheel machine and the winch
The rope slocket is recycled to the anchor chain installation ship.
4. the tensioning method of mooring anchor leg according to claim 3, which is characterized in that the rope slocket includes：Lifting lug and
Pin shaft hole has been connected by buckle ring-like suspender belt on the lifting lug, for being connected with the loop wheel machine eave tile, in the pin shaft hole
On be connected with rigging, for being connected with the winch eave tile, be additionally provided with floating ball on the rigging, the floating ball plays mark and makees
With.
5. the tensioning method of the mooring anchor leg according to any one of claim 1-4, which is characterized in that described in the fixation
The step of rope slocket, includes：
The rope slocket is moved to close to the position of shark jaw；
By drawing below one protective device of wire saws to the rope slocket, and the rope slocket is put into the protective device
In；
The shark jaw is risen, and slowly loosens the traction rope, the protective device is made to slide to two tong arms of the shark jaw
Between it is fixed.
6. the tensioning method of mooring anchor leg according to claim 2, which is characterized in that described to pass through the both ends of dynamometer
The step of working chain is connected respectively with the rope slocket and winch includes：
The connection of the rope slocket and the loop wheel machine eave tile and the winch eave tile is unlocked respectively, and the dynamometer both ends are distinguished
A working chain is connected, the working chain of described dynamometer one end is connected with the winch, the working chain of the other end leads to
The shackle of D types is crossed to be connected with the rope slocket.
7. the tensioning method of mooring anchor leg according to claim 5, which is characterized in that described that the rope slocket is put into sea
In, and the step of working chain between the fixed dynamometer and the winch includes：
The loop wheel machine rigging of a suitable length is arranged on the lifting lug of the rope slocket, to be connected with the loop wheel machine steel wire rope, profit
The rope slocket is sling with the loop wheel machine and is put into marine；
The protective device is removed, the working chain between the dynamometer and winch is fixed with shark jaw.
8. the tensioning method of the mooring anchor leg according to any one of claim 1-4, which is characterized in that described in suction anchor
Installation ship installs the suction anchor of the anchor leg, and has been laid with after the new anchor hawser of the anchor leg, and anchor chain installation ship is displaced to institute
Include before the step of stating new anchor hawser terminal position, recycling rope slocket to the anchor chain installation ship of the new anchor hawser：
The stern of oil tanker is unloaded in Floating Production storage and arranges several /V tugboats, and Floating Production storage is made to unload the bow of oil tanker to just treating place
The anchor leg of reason.
9. the tensioning method of the mooring anchor leg according to any one of claim 1-4, which is characterized in that described in the control
Anchor chain installation ship reduces horsepower, to including after the step of anchor leg progress tension unloading：
It recycles and fixes the rope slocket to the anchor chain installation ship, remove the dynamometer and the working chain.
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| CN105398545B true CN105398545B (en) | 2018-06-01 |
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| NO343647B1 (en) * | 2017-10-16 | 2019-04-23 | Apl Tech As | System and method for connecting a mooring line to a body |
| CN110539848A (en) * | 2019-01-28 | 2019-12-06 | 深圳海油工程水下技术有限公司 | method for replacing mooring anchor legs by lifting double ships |
| 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 |
| 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 |
Citations (3)
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|---|---|---|---|---|
| EP2384299B1 (en) * | 2009-01-26 | 2013-08-07 | Saipem S.p.A. | Method and system for tensioning a function line, in particular a mooring line, of a fpso-vessel |
| CN103781698A (en) * | 2011-07-06 | 2014-05-07 | 单浮筒系泊公司 | Anchor line tensioning method |
| CN104024099A (en) * | 2011-09-23 | 2014-09-03 | Ihc荷兰Ie有限公司 | Device For And Method Of Tensioning Chains, In Particular Mooring Legs |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6983714B2 (en) * | 2001-06-15 | 2006-01-10 | Technip France | Method of and apparatus for offshore mooring |
| WO2015138875A1 (en) * | 2014-03-14 | 2015-09-17 | Intermoor, Inc. | Systems for tensioning mooring lines at the seafloor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2384299B1 (en) * | 2009-01-26 | 2013-08-07 | Saipem S.p.A. | Method and system for tensioning a function line, in particular a mooring line, of a fpso-vessel |
| CN103781698A (en) * | 2011-07-06 | 2014-05-07 | 单浮筒系泊公司 | Anchor line tensioning method |
| CN104024099A (en) * | 2011-09-23 | 2014-09-03 | Ihc荷兰Ie有限公司 | Device For And Method Of Tensioning Chains, In Particular Mooring Legs |
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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. |