CN102269296B - Laying process for submarine pipeline traversing floating type production oil-storing device system - Google Patents
Laying process for submarine pipeline traversing floating type production oil-storing device system Download PDFInfo
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Abstract
The invention provides a laying process for a submarine pipeline traversing floating type production oil-storing device system. The laying process comprising the following steps: installing a starting anchor, laying a starting cable, laying a traversing part pipeline, a traversing part drag-traversing floating type production oil-storing device system, a traversing part pipeline tension test and laying a submarine pipeline; and the laying process is adopted to realize the submarine pipeline laying task of the traversing floating type production oil-storing device system without influencing the normal production of the floating type production oil-storing system, thus being convenient in the submarine pipeline laying task.
Description
Technical field
The present invention relates to a kind of laying process for submarine pipeline traversing floating type production oil-storing device system.
Background technique
Generally pass through (the Floating Production of floating production storage unit system, Storage and Offloading System, FPSO) submarine pipeline is to lay before the FPSO system installs, the pipe laying mode of FPSO system rear existing routine in place can't be passed through the undersea pipe-laying operation of FPSO system, because after the FPSO system is installed, this FPSO system can't remove, and the FPSO system occupies the position of pipe laying barge, pipe laying barge can't carry out pipelaying work, and the undersea pipe-laying that therefore passes through the FPSO system is the difficult problem that the submarine pipeline engineering field face solves.
Summary of the invention
Main purpose of the present invention is to overcome the shortcoming that conventional pipe laying mode can't be laid the submarine pipeline that passes through the floating production storage unit system, and provide a kind of laying process for submarine pipeline traversing floating type production oil-storing device system, adopt this pipe-laying process can be in the situation that do not affect that the floating production storage unit system is normal to produce, the undersea pipe-laying operation of floating production storage unit system is passed through in realization, makes things convenient for the undersea pipe-laying operation.
The objective of the invention is to be realized by following technological scheme.
Laying process for submarine pipeline traversing floating type production oil-storing device system of the present invention, it is characterized in that, comprise initial anchor be installed, laid initial cable, laying through section pipeline, the through section pipeline is dilatory passes through floating production storage unit system (FPSO), the test of through section pipe tension and lay the submarine pipeline step; Wherein:
It is that initial laying immovable point is installed in the seabed that initial anchor step is installed, and this immovable point is positioned on the through section pipeline elongation line, adopts initial anchor 4 as initial laying immovable point, utilizes winch or loop wheel machine that initial anchor is placed the seabed by cloth anchor ship or pipe laying barge;
Laying initial cable step is after initial anchor 4 installations as immovable point, lay the initial cable that is connecting initial anchor along through section pipeline direction, this step comprises: the first step utilizes tugboat and towing cable to pull floating production storage unit 1, floating production storage unit 1 is carried out spacing, make floating production storage unit 1 be positioned at initial cable Vertical direction; Second step carries out the initial cable 51 of first paragraph and lays operation, and first spreads cable ship 21 lays the initial cable 51 of first paragraph from initial anchor 4 beginnings near floating production storage unit 1 along through section pipeline direction; The 3rd step carried out the signal cable and passes through the floating production storage unit system job, utilize winch to discharge respectively two signal cables from floating production storage unit 1 both sides, under the assistance of robot (ROV) 7 the secondary signal cable 62 of floating production storage unit 1 one sides is passed through the floating production storage unit system under water, and be connected under water with the first signal cable 61 of floating production storage unit 1 opposite side; The 4th stepping start of line cable passes through the floating production storage unit system job, by the signal cable that passes through the floating production storage unit system and the first winch that spreads on the cable ship that is positioned at floating production storage unit one side the initial cable 52 of second segment that second of floating production storage unit opposite side spreads on the cable ship is drawn to the first shop cable ship, on this cable boat deck, the first shop, the initial cable 51 of first paragraph is linked to each other with the initial cable 52 of second segment, make two sections initial cables pass through floating production storage unit system (FPSO), first spreads the cable ship slowly places the seabed by the release cable that is connected to winch with the initial cable 51 of first paragraph, the the second shop cable ship that is positioned at simultaneously the floating production storage unit opposite side slowly reclaims the initial cable 52 of second segment by winch, after the first shop cable ship release cable is lax, underwater robot (ROV) 7 is cut off the release cable under water, and second spreads the cable ship continues to lay initial cable; The 5th step carried out the initial cable 52 of second segment and lays operation, and second spreads the cable ship from floating production storage unit 1, lays and the initial cable 52 of the joining second segment of the initial cable of first paragraph along through section pipeline direction;
Laying through section pipeline step is after initial cable laying is finished, pipe laying barge is located in initial cable 52 ends of second segment, reclaim initial cable 52 ends of second segment to pipe laying barge by underwater robot (ROV) 7, utilize the pipe abandon of pipe laying barge/recovery (A/R, abandonment/recovery) winch or stretcher that initial cable system is carried out pull test; Initial cable connects initial cable and the initial end socket of through section submarine pipeline after satisfying the pull test requirement, and pipe laying barge begins to lay through section submarine pipeline A; Starting point and clearing end at the through section pipeline are installed respectively beacon, and the through section submarine pipeline is located under water, and there is nylon rope in each beacon system, so that underwater robot (ROV) reclaims beacon; Carry out pipe abandon after through section submarine pipeline A normal laying is finished, through section submarine pipeline A is placed the seabed, finish the operation of through section undersea pipe-laying;
Dilatory floating production storage unit system (FPSO) step of passing through of through section pipeline is the dilatory floating production storage unit system of passing through of through section pipeline A of will place the seabed; After the through section undersea pipe-laying is finished, pipe laying barge is located in the initial cable starting end of initial cable and initial anchor connection, utilize under water winch to reclaim initial cable starting end to pipe laying barge 3 decks under the help of robot (ROV) 7, the initial cable starting end that is recycled to the deck is connected with the dilatory point 13 of pipe laying barge, and between initial cable and dilatory point, installs and draw vertical meter 14; The pipe laying barge utilization is connected to the initial cable of through section pipeline and draws operation, carry out Real Time Monitoring by 7 pairs of through section pipelines of a underwater robot (ROV) in the dilatory process, prevent initial cable and through section Pipeline damage floating production storage unit system (FPSO); Utilize winch or loop wheel machine at the terminal mooring anchor 12 of installing of through section submarine pipeline after the dilatory end of job, by connecting line 8 through section pipeline A is connected with mooring anchor 12 under the help of robot (ROV) 7 under water;
Through section pipe tension test procedure be through section pipeline A pass through floating production storage unit system (FPSO) in place after, utilize initial cable and pulling force display system thereof that through section pipeline A and mooring anchor system are carried out pull test, guarantee to satisfy the undersea pipe-laying requirement; Through section pipeline and mooring anchor system satisfy the pipe laying requirement, and then pull test finishes, and utilize winch to reclaim and are used for dilatory whole initial cable to pipe laying barge 3 decks;
Lay the submarine pipeline step and be in through section pipeline A and mooring anchor 12 system's pull tests and meet the demands and reclaim initial cable to pipe laying barge 3 decks, utilize under water pipe laying barge (A/R) winch to reclaim initial cable side through section pipeline to the pipe laying barge production line under the help of robot (ROV) 7, begin coastal bottom pipeline design route F and carry out pipelaying work, when spreading submarine pipeline to terminal, carry out the submarine pipeline pipe abandon, pipeline is placed the seabed, finish the undersea pipe-laying operation of floating production storage unit system (FPSO) side; After floating production storage unit system (FPSO) side undersea pipe-laying was complete, pipe laying barge was located in the connecting line 8 and through section pipeline A connection of floating production storage unit system (FPSO) opposite side; Remove under water connecting line 8 under the help of robot (ROV) 7, utilize pipe laying barge (A/R) winch to reclaim through section pipeline A to the pipe laying barge production line, begin coastal bottom pipeline design route F and carry out pipelaying work, finish the operation of whole piece undersea pipe-laying.
Aforementioned laying process for submarine pipeline traversing floating type production oil-storing device system, wherein initial anchor 4 is as initial laying immovable point, and this initial anchor 4 is high holding power anchor or suction anchor.
Aforementioned laying process for submarine pipeline traversing floating type production oil-storing device system, wherein initial anchor 4 connects beacon by the nylon cable, so that initial anchor is located, by underwater robot 7 reclaims beacon after initial anchor is located under water under water.
Aforementioned laying process for submarine pipeline traversing floating type production oil-storing device system, wherein initial cable passes through the floating production storage unit system and comprises and pass through floating production storage unit mooring system, dynamically cable system, riser systems and floating production storage unit 1; Initial cable passes through the whole process of floating production storage unit system and monitors by underwater robot 7.
Aforementioned laying process for submarine pipeline traversing floating type production oil-storing device system, wherein initial cable is divided into the initial cable of first paragraph and the initial cable of second segment, the initial cable of first paragraph from initial anchor joint to floating production storage unit 1 one sides, the initial cable of second segment is from floating production storage unit 1 opposite side to beginning to lay through section pipeline A, be that initial cable is punished into two sections at the floating production storage unit body, be convenient to initial cable and pass through the laying of floating production storage unit system, the initial cable of this first paragraph is being connected near floating production storage unit 1 place by socket with the initial cable of second segment.
Aforementioned laying process for submarine pipeline traversing floating type production oil-storing device system, wherein initial cable paving system test pulling force is 1 to 2 times of maximum initial laying pulling force.
Aforementioned laying process for submarine pipeline traversing floating type production oil-storing device system, 1 to 2 times of the maximum static friction force sum that stern to mud point segment pipe can bear at seabed mud face when wherein through section pipeline and mooring anchor system test pulling force were maximum normal laying pulling force and normal laying.
Aforesaid laying process for submarine pipeline traversing floating type production oil-storing device system, wherein beacon is the acoustics beacon.
Aforementioned laying process for submarine pipeline traversing floating type production oil-storing device system is wherein installed between initial cable and the dilatory point and is drawn vertical meter 14, and this tensometer 14 has the pulling force real-time display system, so that dilatory force is monitored.
The beneficial effect of laying process for submarine pipeline traversing floating type production oil-storing device system of the present invention, 1, by initial anchor being installed as the seabed immovable point of the initial laying of submarine pipeline, this technique is simple, reliable, for the initial laying of through section pipeline is given security.2, realize that by the draw cord that connects FPSO system both sides under water draw cord passes through the FPSO system, this technological operation is easy, and at the bottom of the task difficulty, risk is little.3, initial cable is punished into two sections at the FPSO body, the end that the dilatory initial cable of second segment of draw cord of FPSO system is passed through in utilization passes through the FPSO system, and carry out waterborne the connection with the initial cable of first paragraph, realize that initial cable passes through the FPSO system, at the bottom of this technological operation difficulty, risk is little, and can realize that initial cable passes through the FPSO system, passes through for submarine pipeline is dilatory and lays a good foundation.4, pass through the FPSO system by the dilatory through section submarine pipeline of the initial cable that passes through the FPSO system, realized that submarine pipeline passes through the FPSO system and lays.5, submarine pipeline is dilatory passes through FPSO system laying process, does not need to remove the FPSO system, also can not affect the normal manufacturing operation of FPSO system.6, submarine pipeline is dilatory passes through FPSO system laying process, can realize that submarine pipeline passes through FPSO system, submarine pipeline one end fully and passes through the undersea pipe-laying that FPSO system and submarine pipeline end are positioned at three kinds of different situations of FPSO system one side.
Description of drawings:
Fig. 1 is the initial anchoring fixed point of the present invention mounting point schematic diagram.
Fig. 2 is that draw cord of the present invention passes through the FPSO schematic diagram.
Fig. 3 is that the initial cable of the present invention passes through the FPSO schematic diagram.
Fig. 4 is that the initial cable of the present invention passes through FPSO laying figure.
Fig. 5 is through section pipe laying schematic diagram of the present invention.
Fig. 6 is the dilatory through section Pipeline Crossing Program FPSO schematic diagram of the present invention.
Fig. 7 is through section pipe tension test schematic diagram of the present invention.
Fig. 8 is the initial cable side of the present invention undersea pipe-laying schematic diagram.
Fig. 9 is mooring anchor side undersea pipe-laying schematic diagram of the present invention.
Figure 10 is embodiment of the invention field produces facility layout plan.
Figure 11 is that embodiment of the invention through section pipeline is dilatory with regard to bitmap.
Major label description in figure: 1 floating production storage unit, 21 first spread the cable ship, 22 second spread the cable ship, 3 pipe laying barges, 4 initial anchors, 41 mooring systems, the initial cable of 51 first paragraphs, the initial cable of 52 second segments, 61 first signal lines, 62 secondary signal lines, 7 is underwater robot (ROV), 8 connecting lines, 9 dynamic cables, 10 compliant risers, A through section pipeline, the former submarine cable of B, the former submarine pipeline of C, 11 discharge cable, 12 mooring anchors, 13 dilatory points, 14 tensometers, D is the PY4-2 platform, E is the PY5-1 platform, F is the Submarine Pipeline Design route.
Embodiment
Extremely shown in Figure 9 such as Fig. 1, laying process for submarine pipeline traversing floating type production oil-storing device system of the present invention, it is characterized in that, comprise initial anchor be installed, laid initial cable, laying through section pipeline, the through section pipeline is dilatory passes through floating production storage unit system (FPSO), the test of through section pipe tension and lay the submarine pipeline step; Wherein:
It is that initial laying immovable point is installed in the seabed that initial anchor step is installed, this immovable point is positioned on the through section pipeline elongation line, adopt initial anchor 4 as initial laying immovable point, utilize winch or loop wheel machine that initial anchor is placed the seabed by cloth anchor ship or pipe laying barge, as shown in Figure 1;
Laying initial cable step is after initial anchor 4 installations as immovable point, lay the initial cable that is connecting initial anchor along through section pipeline direction, this step comprises: the first step utilizes tugboat and towing cable to pull floating production storage unit 1, floating production storage unit 1 is carried out spacing, make floating production storage unit 1 be positioned at initial cable Vertical direction; Second step carries out the initial cable 51 of first paragraph and lays operation, and first spreads cable ship 21 lays the initial cable 51 of first paragraph from initial anchor 4 beginnings near floating production storage unit 1 along through section pipeline direction; The 3rd step carried out the signal cable and passes through the floating production storage unit system job, utilize winch to discharge respectively two signal cables from floating production storage unit 1 both sides, under the assistance of robot (ROV) 7 the secondary signal cable 62 of floating production storage unit 1 one sides is passed through the floating production storage unit system under water, and be connected under water with the first signal cable 61 of floating production storage unit 1 opposite side, as shown in Figure 2; The 4th stepping start of line cable passes through the floating production storage unit system job, by the signal cable that passes through the floating production storage unit system and the first winch that spreads on the cable ship that is positioned at floating production storage unit one side the initial cable 52 of second segment that second of floating production storage unit opposite side spreads on the cable ship is drawn to the first shop cable ship, on this cable boat deck, the first shop, the initial cable 51 of first paragraph is linked to each other with the initial cable 52 of second segment, make two sections initial cables pass through floating production storage unit system (FPSO), first spreads the cable ship slowly places the seabed by the release cable that is connected to winch with the initial cable 51 of first paragraph, the the second shop cable ship that is positioned at simultaneously the floating production storage unit opposite side slowly reclaims the initial cable 52 of second segment by winch, after the first shop cable ship release cable is lax, underwater robot (ROV) 7 is cut off the release cable under water, and second spreads the cable ship continues to lay initial cable; The 5th step carried out the initial cable 52 of second segment and lays operation, and second spreads the cable ship from floating production storage unit 1, lays and the initial cable 52 of the joining second segment of the initial cable of first paragraph Fig. 3, shown in Figure 4 along through section pipeline direction;
Laying through section pipeline step is after initial cable laying is finished, pipe laying barge is located in initial cable 52 ends of second segment, reclaim initial cable 52 ends of second segment to pipe laying barge by underwater robot (ROV) 7, utilize the pipe abandon of pipe laying barge/recovery (A/R, abandonment/recovery) winch or stretcher that initial cable system is carried out pull test; Initial cable connects initial cable and the initial end socket of through section submarine pipeline after satisfying the pull test requirement, and pipe laying barge begins to lay through section submarine pipeline A; Starting point and clearing end at the through section pipeline are installed respectively beacon, and the through section submarine pipeline is located under water, and there is nylon rope in each beacon system, so that underwater robot (ROV) reclaims beacon; Carry out pipe abandon after through section submarine pipeline A normal laying is finished, through section submarine pipeline A is placed the seabed, finish the operation of through section undersea pipe-laying, as shown in Figure 5;
Dilatory floating production storage unit system (FPSO) step of passing through of through section pipeline is the dilatory floating production storage unit system of passing through of through section pipeline A of will place the seabed; After the through section undersea pipe-laying is finished, pipe laying barge is located in the initial cable starting end of initial cable and initial anchor connection, utilize under water winch to reclaim initial cable starting end to pipe laying barge 3 decks under the help of robot (ROV) 7, the initial cable starting end that is recycled to the deck is connected with the dilatory point 13 of pipe laying barge, and between initial cable and dilatory point, installs and draw vertical meter 14; The pipe laying barge utilization is connected to the initial cable of through section pipeline and draws operation, carry out Real Time Monitoring by 7 pairs of through section pipelines of a underwater robot (ROV) in the dilatory process, prevent initial cable and through section Pipeline damage floating production storage unit system (FPSO); Utilize winch or loop wheel machine at the terminal mooring anchor 12 of installing of through section submarine pipeline after the dilatory end of job, by connecting line 8 through section pipeline A is connected with mooring anchor 12 under the help of robot (ROV) 7 under water, as shown in Figure 6;
Through section pipe tension test procedure be through section pipeline A pass through floating production storage unit system (FPSO) in place after, utilize initial cable and pulling force display system thereof that through section pipeline A and mooring anchor system are carried out pull test, guarantee to satisfy the undersea pipe-laying requirement; Through section pipeline and mooring anchor system satisfy the pipe laying requirement, and then pull test finishes, and utilize winch to reclaim and are used for dilatory whole initial cable to pipe laying barge 3 decks, as shown in Figure 7;
Lay the submarine pipeline step and be in through section pipeline A and mooring anchor 12 system's pull tests and meet the demands and reclaim initial cable to pipe laying barge 3 decks, utilize under water pipe laying barge (A/R) winch to reclaim initial cable side through section pipeline to the pipe laying barge production line under the help of robot (ROV) 7, begin coastal bottom pipeline design route F and carry out pipelaying work, when spreading submarine pipeline to terminal, carry out the submarine pipeline pipe abandon, pipeline is placed the seabed, finish the undersea pipe-laying operation of floating production storage unit system (FPSO) side; After floating production storage unit system (FPSO) side undersea pipe-laying was complete, pipe laying barge was located in the connecting line 8 and through section pipeline A connection of floating production storage unit system (FPSO) opposite side; Remove under water connecting line 8 under the help of robot (ROV) 7, utilize pipe laying barge (A/R) winch to reclaim through section pipeline A to the pipe laying barge production line, begin coastal bottom pipeline design route F and carry out pipelaying work, finish the operation of whole piece undersea pipe-laying.
Laying process for submarine pipeline traversing floating type production oil-storing device system of the present invention, wherein, this initial anchor 4 is as initial laying immovable point, and this initial anchor 4 is high holding power anchor or suction anchor; Initial anchor 4 connects beacon by the nylon cable, so that initial anchor is located, by underwater robot 7 reclaims beacon after initial anchor is located under water under water; This initial cable passes through the floating production storage unit system and comprises and pass through floating production storage unit mooring system, dynamically cable system, riser systems and floating production storage unit 1; Initial cable passes through the whole process of floating production storage unit system and monitors by underwater robot 7; Initial cable is divided into the initial cable of first paragraph and the initial cable of second segment, the initial cable of first paragraph from initial anchor joint to floating production storage unit 1 one sides, the initial cable of second segment is from floating production storage unit 1 opposite side to beginning to lay through section pipeline A, be that initial cable is punished into two sections at the floating production storage unit body, be convenient to initial cable and pass through the laying of floating production storage unit system, the initial cable of this first paragraph is being connected near floating production storage unit 1 place by socket with the initial cable of second segment; Initial cable paving system test pulling force is 1 to 2 times of maximum initial laying pulling force; 1 to 2 times of the maximum static friction force sum that stern to mud point segment pipe can bear at seabed mud face when through section pipeline and mooring anchor system test pulling force were maximum normal laying pulling force and normal laying; This beacon is the acoustics beacon; Install between initial cable and the dilatory point and draw vertical meter 14, this tensometer 14 has the pulling force real-time display system, so that dilatory force is monitored.
The enforcement of laying process for submarine pipeline traversing floating type production oil-storing device system of the present invention, such as Figure 10, shown in Figure 11:
Approximately 100 meters of 4-2/5-1 oil field, Fanyu depth of waters comprise PY4-2 platform D, PY5-1 platform E and a floating production storage unit (FPSO) 1, and this floating production storage unit (FPSO) 1 is positioned at the neutral position of platform D and platform E.These two platform D link to each other with floating production storage unit 1 with submarine cable by submerged pipeline respectively with E, as shown in figure 10; According to need of production, be parallel to former submarine pipeline C and again lay a submarine pipeline F, new laid pipes F passes through floating production storage unit (FPSO) system.
1, initial anchor is installed, as shown in Figure 1.The initial anchor system that 4-2/5-1 oil field, Fanyu is used for undersea pipe-laying by anchor float, anchor floats cable, beacon and initial anchor 4 form.The connection anchor floats cable and initial cable arrives initial anchor 4.It is 150 meters that anchor floats cable length, and more loose anchor floats cable is convenient to installation and the dismounting that anchor floats, and is conducive to the recovery of initial anchor.Float cable with nylon cable connection beacon and anchor, 7 pairs of beacons of available underwater robot (ROV) reclaim.Beacon mounting point and initial anchor 4 are used for initial anchor 4 is located under water at a distance of 2 meters.Utilize winch slowly to discharge anchor and float cable, initial anchor 4 is installed to the seabed, guarantee that by beacon and underwater robot (ROV) position of initial anchor 4 is positioned on the elongation line of through section pipeline, initial anchor is 1750 meters apart from floating production storage unit (FPSO).Anchor floats the terminal anchor that connects of cable and floats, and anchor is floated cable and anchor float and be discharged in the sea.
2, lay initial cable.Passing through floating production storage unit (FPSO) for the ease of initial cable lays, 4-2/5-1 initial cable in Fanyu is two sections in 1 punishment of floating production storage unit (FPSO) body, be connected by socket, the initial cable 51 of first paragraph is 1750 meters, and the initial cable 52 of second segment is 780 meters.Lay the initial cable 51 of first paragraph that is connecting initial anchor 4 along through section pipeline direction after initial anchor 4 installations.At initial cable and submarine cable B and submarine pipeline C infall protection device for installing, prevent from damaging submarine cable B and submarine pipeline C.The key that initial cable is laid and difficult point be initial cable pass through floating production storage unit (FPSO) and anchor 41, dynamically cable 9, standpipe 10.It is as follows that initial cable passes through laying process:
(1) floating production storage unit body 1 is spacing, as shown in Figure 1.For guaranteeing to spread cable ship and FPSO security of system, reduce operating risk, to carry out spacing to floating production storage unit body 1 before initial cable passes through, adopt three tugboats and towing cable to pull floating production storage unit body 1, carry out the spacing of floating production storage unit body 1, make floating production storage unit body 1 be positioned at initial cable Vertical direction, spacing test is finished and the laggard start of line cable of spacing success passes through operation.
(2) the signal cable passes through floating production storage unit body 1, as shown in Figure 2.Utilize the winch that spreads on the cable ship to discharge respectively first signal line 61 and secondary signal line 62 from floating production storage unit body 1 both sides, under the assistance of robot (ROV) 7 the second secondary signal cable 62 that spreads 22 releases of cable ship is passed through floating production storage unit body 1 under water, and be connected under water with the first first signal cable 61 that spreads 21 releases of cable ship.Monitor under water by underwater robot 7, the anchor of anti-stop signal cable and floating production storage unit system floats cable 41, dynamically cable 9 and standpipe 10 windings.
(3) initial cable passes through the floating production storage unit system, as shown in Figure 3, Figure 4.By the winch that passes through on floating production storage unit body 1 first signal cable 61 and secondary signal cable 62 and the first shop cable ship 21 the initial cable 52 of second segment is drawn to the first shop cable ship 21, on cable ship 21 decks, the first shop, the initial cable 51 of first paragraph is linked to each other with the initial cable 52 of second segment, make two sections initial cables pass through floating production storage unit (FPSO) system, first spreads cable ship 21 slowly places the seabed by the release cable 11 that is connected to winch with the initial cable 51 of first paragraph, the second shop cable ship 22 slowly reclaims the initial cable 52 of second segment by the winch of this ship simultaneously, after the first shop cable ship 21 release cables 11 relax, underwater robot 7 (ROV) is cut off under water and is discharged the initial cable 52 of cable 11, the second shop cable ships, 22 laying second segments.Pass through the whole process of floating production storage unit system by the initial cable of underwater robot 7 (ROV) monitoring, avoid the anchor hawser 41 of initial cable and floating production storage unit system, dynamically cable 9 and standpipe 10 windings.
(3) lay the through section pipeline, such as Fig. 5, Fig. 6, shown in Figure 7.
The step of laying through section pipeline A is after initial cable laying is finished, pipe laying barge 3 is located in initial cable 52 ends of second segment, utilize underwater robot 7 (ROV) to reclaim initial cable end to pipe laying barge 3, connect initial cable and the initial end socket of submarine pipeline at pipe laying barge 3 sterns, by the submarine pipeline of the initial end socket of pipe laying barge stretcher clamping band, make initial submarine pipeline keep fixing with respect to pipe laying barge 3.Along through section pipeline route slow mobile pipe laying barge 3 forward, see by the stretcher terminal display system of this pipe laying barge 3 and to wipe initial cable pulling force, and note down in real time.Whether when initial cable pulling force reaches 56 tons (initial laying maximum pull 80%), stablize pipe laying barge 3, observing initial cable pulling force has significant change.If initial anchor, continues slow mobile pipe laying barge 3 without obvious slippage, increase initial cable pulling force to 70 ton (100% maximum initial laying pulling force), stablize pipe laying barge 3, whether observe initial cable pulling force has significant change.If initial anchor, continues slow mobile pipe laying barge 3 without obvious slippage, increase initial cable pulling force to 84 ton (maximum initial laying pulling force 1.2 times), stablize pipe laying barge 3, observe initial cable tension variations.After initial cable pulling force is stable, keep 84 tons of pulling force to be no less than 30 minutes.Initial cable connects initial cable and the initial end socket of through section submarine pipeline A after satisfying the pull test requirement, and pipe laying barge 3 begins to lay through section submarine pipeline A.1615 meters of through section submerged pipeline total lengths.For the through section submerged pipeline is monitored, in crossline starting point, termination section one piece of beacon is installed respectively, the through section submerged pipeline to be located under water, there is nylon rope in each beacon system, so that underwater robot 7 (ROV) reclaims beacon.Carry out pipe abandon after through section submarine pipeline A normal laying is finished, through section submarine pipeline A is placed the seabed, finish the operation of through section undersea pipe-laying.
(4) dilatory through section Pipeline Crossing Program floating production storage unit system is such as Fig. 6, Fig. 7, Fig. 8, shown in Figure 9.
Fanyu 4-2/5-1 undersea pipe-laying is that the domestic submerged pipeline that carries out first passes through the floating production storage unit system job, and submarine pipeline is drawn and passed through floating production storage unit and anchoring thereof, dynamically cable, riser systems are key and the difficult points that Fanyu 4-2/5-1 submerged pipeline is laid.After the through section submerged pipeline was laid and finished, pipe laying barge 3 utilized the initial cable that is connected to crossing pipeline to draw operation:
At first, after 1615 meters through section submerged pipelines were laid and finished, cloth anchor tugboat reclaimed initial anchor system.
Then, carry out spacing to floating production storage unit body 1 before crossline is dilatory, adopt three tugboats to carry out the spacing of floating production storage unit body 1, make floating production storage unit body 1 be positioned at initial cable Vertical direction, spacing test finish and spacing success after draw and pass through operation.
Secondly, pipe laying barge 3 is located in initial anchor 4 places, reclaim under water the starting end of the first beginning cable 51 under the help of robot 7, the first initial cable 51 is connected with the dilatory point 13 of pipe laying barge 3, and between dilatory point 13 and initial cable 51, tensometer is installed, show in real time the pulling force size, pulling force is monitored.
Then, after by underwater robot 7 (ROV) the underwater drawing system being finished inspection, pipe laying barge 3 slowly moves forward, begin to draw operation, in the dilatory process, the standpipe 10 of 7 pairs of floating production storage unit systems of underwater robot, dynamic cable 9 are monitored, and prevent that dilatory cable from damaging the floating production storage unit system.Through section submarine pipeline A stops to draw during near the final position, slowly reduces pulling force.The for the first time dilatory end of job, 1361 meters of dilatory submerged pipelines.
At last, the beacon that utilizes through section submarine pipeline A to install positions through section submarine pipeline A, determines that through section submarine pipeline A is apart from the distance of final position.At the terminal mooring anchor 12 of installing of through section submarine pipeline A, determine to be connected and fixed the connecting line length of anchor 12 and through section submarine pipeline A apart from the distance of final position according to the position relationship of mooring anchor 12 and through section submarine pipeline A and through section submarine pipeline A.After the connecting line installation, finally draw in placely, make through section submarine pipeline A arrive the final position, as shown in figure 11.
5, through section submarine pipeline A and mooring anchor pull test.
Through section submarine pipeline A pass through the floating production storage unit system in place after, through section submarine pipeline A and mooring anchor 12 are carried out pull test, guarantee to satisfy submerged pipeline and lay requirement.Slowly increase pulling force to 120 ton, kept pulling force 30 minutes, monitor by 7 pairs of mooring anchors 12 of underwater robot.Suction anchor satisfies the pipe laying requirement, and then pull test finishes, and reclaims whole initial cables.
6, normal laying submerged pipeline.
After through section submarine pipeline A was in place, pull test met the demands, and then reclaimed submerged pipeline, carried out normal pipelaying work.The A/R winch that utilizes pipe laying barge is recycled to the pipe laying barge production line with the through section submarine pipeline of initial cable side, and welded pipe line then is along design route pipeline installation to PY4-2 platform place.The place carries out pipe abandon at the PY4-2 platform, and submerged pipeline is routed to design attitude, finishes floating production storage unit to the undersea pipe-laying of PY4-2 platform.
After the PY4-2 platform is complete to the undersea pipe-laying between the floating production storage unit body 1, pipe laying barge 3 is located in mooring anchor 12 places, remove under water connecting line 8 under the help of robot (ROV), the through section submarine pipeline A that utilizes pipe laying barge (A/R) winch to reclaim to be connected with mooring anchor 12 is to the pipe laying barge production line, carry out the operation of normal laying submarine pipeline, submarine pipeline spreads the platform to PY5-1.The place carries out pipe abandon at the PY5-1 platform, and submerged pipeline is routed to design attitude.Finish pass through the floating production storage unit system the PY4-2 platform to PY5-1 platform undersea pipe-laying.
The advantage of laying process for submarine pipeline traversing floating type production oil-storing device system of the present invention:
1, need not remove the floating production storage unit system and just can carry out undersea pipe-laying, can pass through under the normal condition of producing of floating production storage unit system not affecting submarine pipeline, finish and pass through the submarine pipeline that submarine pipeline passes through the floating production storage unit system and spread.2, operating procedure is simple, and reliability is high, and operating risk is low, and practicability is good.3, being applicable to submarine pipeline passes through submarine pipeline fully and passes through floating production storage unit system, submarine pipeline one end and pass through that submarine pipeline passes through the floating production storage unit system and the submarine pipeline end is positioned at the situation that submarine pipeline passes through the floating production storage unit system side.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment does.
Claims (9)
1. laying process for submarine pipeline traversing floating type production oil-storing device system, it is characterized in that, comprise initial anchor be installed, laid initial cable, laying through section submarine pipeline, the through section submarine pipeline is dilatory passes through floating production storage unit system, through section submarine pipeline pull test and lay the submarine pipeline step; Wherein:
It is that initial laying immovable point is installed in the seabed that initial anchor step is installed, this immovable point is positioned on the through section submarine pipeline routing elongation line, adopt initial anchor (4) as initial laying immovable point, utilize winch or loop wheel machine that initial anchor is placed the seabed by cloth anchor ship or pipe laying barge;
Laying initial cable step is after initial anchor (4) installation as immovable point, lay the initial cable that is connecting initial anchor along through section submarine pipeline routing direction, this step comprises: the first step utilizes tugboat and towing cable to pull floating production storage unit (1), floating production storage unit (1) is carried out spacing, make floating production storage unit (1) be positioned at initial cable Vertical direction; Second step carries out the initial cable of first paragraph (51) and lays operation, and first spreads cable ship (21) lays the initial cable of first paragraph (51) near floating production storage unit (1) from initial anchor (4) beginning along through section submarine pipeline routing direction; The 3rd step carried out the signal cable and passes through the floating production storage unit system job, utilize winch to discharge respectively two signal cables from floating production storage unit (1) both sides, under the assistance of robot (7) the secondary signal cable (62) of floating production storage unit (1) one side is passed through the floating production storage unit system under water, and be connected under water with the first signal cable (61) of floating production storage unit (1) opposite side; The 4th stepping start of line cable passes through the floating production storage unit system job, by the signal cable that passes through the floating production storage unit system and the first winch that spreads on the cable ship that is positioned at floating production storage unit one side the initial cable of second segment (52) that second of floating production storage unit opposite side spreads on the cable ship is drawn to the first shop cable ship, on this cable boat deck, the first shop, the initial cable of first paragraph (51) is linked to each other with the initial cable of second segment (52), make two sections initial cables pass through the floating production storage unit system, first spreads the cable ship slowly places the seabed by the release cable that is connected to winch with the initial cable of first paragraph (51), the the second shop cable ship that is positioned at simultaneously the floating production storage unit opposite side slowly reclaims the initial cable of second segment (52) by winch, after the first shop cable ship release cable is lax, underwater robot (7) is cut off the release cable under water, and second spreads the cable ship continues to lay initial cable; The 5th step carried out the initial cable of second segment (52) and lays operation, and second spreads the cable ship from floating production storage unit (1), lays and the initial cable of the joining second segment of the initial cable of first paragraph (52) along through section submarine pipeline routing direction;
Laying through section submarine pipeline step is after initial cable laying is finished, pipe laying barge is located in the initial cable of second segment (52) end, reclaim the initial cable of second segment (52) by underwater robot (7) terminal to pipe laying barge, utilize the pipe abandon of pipe laying barge/recovery winch or stretcher that initial cable system is carried out pull test; Initial cable connects initial cable and the initial end socket of through section submarine pipeline after satisfying the pull test requirement, and pipe laying barge begins to lay through section submarine pipeline (A); Starting point and clearing end at the through section submarine pipeline are installed respectively beacon, and the through section submarine pipeline is located under water, and there is nylon rope in each beacon system, so that underwater robot (7) reclaims beacon; Carry out pipe abandon after through section submarine pipeline (A) normal laying is finished, through section submarine pipeline (A) is placed the seabed, finish the operation of through section undersea pipe-laying;
The dilatory floating production storage unit system step of passing through of through section submarine pipeline is with the dilatory floating production storage unit system of passing through of the through section submarine pipeline (A) of placing the seabed; After the through section undersea pipe-laying is finished, pipe laying barge is located in the initial cable starting end of initial cable and initial anchor connection, utilize under water winch to reclaim initial cable starting end to pipe laying barge (3) deck under the help of robot (7), the initial cable starting end that is recycled to the deck is connected with the dilatory point (13) of pipe laying barge, and between initial cable and dilatory point, tensometer (14) is installed; The pipe laying barge utilization is connected to the initial cable of through section submarine pipeline and draws operation, by a underwater robot (7) the through section submarine pipeline is carried out Real Time Monitoring in the dilatory process, prevent that initial cable and through section submarine pipeline from damaging the floating production storage unit system; Utilize winch or loop wheel machine at the terminal mooring anchor (12) of installing of through section submarine pipeline after the dilatory end of job, by connecting line (8) through section submarine pipeline (A) is connected with mooring anchor (12) under the help of robot (7) under water;
Through section submarine pipeline pull test step be through section submarine pipeline (A) pass through the floating production storage unit system in place after, utilize initial cable and pulling force display system thereof that through section submarine pipeline (A) and mooring anchor system are carried out pull test, guarantee to satisfy the undersea pipe-laying requirement; Through section submarine pipeline and mooring anchor system satisfy the pipe laying requirement, and then pull test finishes, and utilize winch to reclaim and are used for dilatory whole initial cable to pipe laying barge (3) deck;
Lay the submarine pipeline step and be in through section submarine pipeline (A) and mooring anchor (12) system pull test and meet the demands and reclaim initial cable to pipe laying barge (3) deck, utilize under water the pipe abandon of pipe laying barge/recovery winch to reclaim initial cable side through section submarine pipeline to the pipe laying barge production line under the help of robot (7), begin coastal bottom pipeline route (F) and carry out pipelaying work, when spreading submarine pipeline to terminal, carry out the submarine pipeline pipe abandon, pipeline is placed the seabed, finish the undersea pipe-laying operation of floating production storage unit system one side; After floating production storage unit system one side undersea pipe-laying was complete, pipe laying barge was located in the connecting line (8) and through section submarine pipeline (A) connection of floating production storage unit system opposite side; Remove connecting line (8) under the help of robot (7) under water, utilize the pipe abandon of pipe laying barge/recovery winch to reclaim through section submarine pipeline (A) to the pipe laying barge production line, begin coastal bottom pipeline route (F) and carry out pipelaying work, finish the operation of whole piece undersea pipe-laying.
2. described laying process for submarine pipeline traversing floating type production oil-storing device system according to claim 1 is characterized in that, described initial anchor (4) is as initial laying immovable point, and this initial anchor (4) is high holding power anchor or suction anchor.
3. described laying process for submarine pipeline traversing floating type production oil-storing device system according to claim 1, it is characterized in that, described initial anchor (4) connects beacon by the nylon cable, so that initial anchor is located, by underwater robot (7) reclaims beacon after initial anchor is located under water under water.
4. described laying process for submarine pipeline traversing floating type production oil-storing device system according to claim 1, it is characterized in that, described initial cable passes through the floating production storage unit system and comprises and pass through floating production storage unit mooring system, dynamically cable system, riser systems and floating production storage unit (1); Initial cable passes through the whole process of floating production storage unit system and monitors by underwater robot (7).
5. according to claim 1 or 4 described laying process for submarine pipeline traversing floating type production oil-storing device systems, it is characterized in that, described initial cable is divided into the initial cable of first paragraph and the initial cable of second segment, the initial cable of first paragraph from initial anchor joint to floating production storage unit (1) one side, the initial cable of second segment is from floating production storage unit (1) opposite side to beginning to lay through section submarine pipeline (A), and the initial cable of this first paragraph is being connected near floating production storage unit body place by socket with the initial cable of second segment.
6. described laying process for submarine pipeline traversing floating type production oil-storing device system according to claim 1 is characterized in that, described initial cable paving system test pulling force is 1 to 2 times of maximum initial laying pulling force.
7. described laying process for submarine pipeline traversing floating type production oil-storing device system according to claim 1, it is characterized in that 1 to 2 times of the maximum static friction force sum that stern to mud point segment pipe can bear at seabed mud face when described through section submarine pipeline and mooring anchor system test pulling force were maximum normal laying pulling force and normal laying.
8. described laying process for submarine pipeline traversing floating type production oil-storing device system according to claim 1 is characterized in that, described beacon is the acoustics beacon.
9. described laying process for submarine pipeline traversing floating type production oil-storing device system according to claim 1, it is characterized in that, between described initial cable and the dilatory some tensometer (14) is installed, this tensometer (14) has the pulling force real-time display system, so that dilatory force is monitored.
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| CN102588675B (en) * | 2012-03-14 | 2014-02-05 | 中国海洋石油总公司 | Method for protectively recovering flexible tube from deep water |
| CN103574288A (en) * | 2012-07-19 | 2014-02-12 | 罗晓晖 | Submarine ring expanding mutual-assistance type concealedly-distributed pipeline system |
| CN105805415B (en) * | 2016-04-26 | 2017-11-17 | 中国海洋石油总公司 | The laying method of deep-water subsea pipeline starting |
| CN107013743A (en) * | 2017-04-24 | 2017-08-04 | 海洋石油工程股份有限公司 | Deep water hydrocarbon platform steel catenary riser installation method |
| CN108820151B (en) * | 2018-07-27 | 2020-03-27 | 海洋石油工程股份有限公司 | Method for distributing anchor of offshore ship |
| CN108808568A (en) * | 2018-08-02 | 2018-11-13 | 江苏海上龙源风力发电有限公司 | A kind of offshore wind turbine buoyant foundation output dynamic extra large cable mounting process |
| CN109747789A (en) * | 2019-01-14 | 2019-05-14 | 海洋石油工程股份有限公司 | The method of floating type production, storage and offloading device is avoided when submerged pipeline is laid with |
| CN112709865A (en) * | 2020-12-09 | 2021-04-27 | 海洋石油工程股份有限公司 | Method for initial laying of ultra-deep water sea pipe by using gravity anchor |
| CN112989670B (en) * | 2021-04-07 | 2023-03-17 | 中海油（天津）管道工程技术有限公司 | Dragging head for submarine pipeline restoration and finite element analysis design method |
| CN114739328A (en) * | 2022-04-11 | 2022-07-12 | 莱赛激光科技股份有限公司 | Sensing device for measuring ground fluctuation and floor flatness measuring robot |
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| US20070081862A1 (en) * | 2005-10-07 | 2007-04-12 | Heerema Marine Contractors Nederland B.V. | Pipeline assembly comprising an anchoring device and method for installing a pipeline assembly comprising an anchoring device |
| CN2897816Y (en) * | 2006-03-21 | 2007-05-09 | 中国海洋石油总公司 | Floating oil-storing and producing apparatus |
| GB0704411D0 (en) * | 2007-03-07 | 2007-04-18 | Saipem Spa | Undersea pipe-laying |
| WO2011028432A2 (en) * | 2009-08-26 | 2011-03-10 | Deepflex Inc. | Flexible catenary riser having distributed sag bend ballast |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: Offshore Oil Engineering Co., Ltd. Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: Offshore Oil Engineering Co., Ltd. Patentee before: China National Offshore Oil Corporation |
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