CN117722536A - Dynamic hose laying method when FPSO is out of place - Google Patents
Dynamic hose laying method when FPSO is out of place Download PDFInfo
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- CN117722536A CN117722536A CN202311730522.2A CN202311730522A CN117722536A CN 117722536 A CN117722536 A CN 117722536A CN 202311730522 A CN202311730522 A CN 202311730522A CN 117722536 A CN117722536 A CN 117722536A
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- dynamic flexible
- vertical pipe
- flexible vertical
- pontoon
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000725 suspension Substances 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 230000009189 diving Effects 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 239000003112 inhibitor Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 6
- 238000005452 bending Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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Abstract
The invention discloses a dynamic hose laying method when an FPSO is out of place, which comprises the following steps: paving the head end of the dynamic flexible vertical pipe, and synchronously installing the floats; the ROV is used for assisting in connecting the head end of the dynamic flexible vertical pipe with the balancing weight; the operation ship moves to the side position of the pontoon, and the temporary suspension rigging is arranged at the tail end of the dynamic flexible vertical pipe; the ROV performs temporary suspension of the dynamic flexible riser; the crane lifts the dynamic flexible vertical pipe through the mouth of the protecting pipe of the pontoon, the diver completes the assembly of the end flange of the dynamic flexible vertical pipe on the top end suspension flange of the mouth of the protecting pipe of the pontoon, the top suspension of the pontoon of the dynamic flexible vertical pipe is completed, and the laying of the dynamic flexible vertical pipe when the whole FPSO is out of place is completed. The invention only needs to use a single operation ship, and the whole construction flow is safer due to small limiting factors such as weather windows and FPSO, and the offshore construction efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of ocean engineering, in particular to a dynamic hose laying method when an FPSO is out of place.
Background
The dynamic flexible vertical pipe is a pipeline for connecting an underwater manifold and an FPSO, is usually connected with the head end of the dynamic flexible vertical pipe under water by using an FPSO winch, is laid after being pulled, is laid on a float section of the dynamic flexible vertical pipe after being laid to a certain length, is finally placed at a target position by using a mode of connecting a balancing weight at the tail end of the dynamic flexible vertical pipe, is finally connected back to the underwater manifold by using a saturated diver, is mainly applied to the scene of the FPSO in place, and is also a more mainstream dynamic flexible vertical pipe installation method,
according to the traditional dynamic flexible riser laying method, the FPSO is laid in the direction from the FPSO to the water in most cases, a plurality of ships are used for limiting the FPSO, the auxiliary ships are used for carrying out head-end pulling transfer on the dynamic flexible riser, after pulling, an air diver is used for underwater installation of a bottom pipe protection port of the FPSO on a bending prevention device of the dynamic flexible riser, therefore, the requirements on a weather window for continuous operation and safety level for operation around the FPSO are high in the traditional method, and the method also becomes an important factor for affecting the overall installation efficiency of the dynamic flexible riser due to the mode of cooperation and common operation of the plurality of ships.
Disclosure of Invention
The invention aims to provide a dynamic hose laying method when an FPSO is out of place, and only a single operation ship is needed, so that the whole construction flow is safer due to small limiting factors such as weather windows and FPSO limit, and the offshore construction efficiency is greatly improved.
In order to achieve the object of the present invention, the present invention provides a dynamic hose laying method when an FPSO is out of place, comprising the steps of:
s1, paving the head end of a dynamic flexible vertical pipe, and installing a floater on the dynamic flexible vertical pipe when the dynamic flexible vertical pipe is released to the position of a first floater mark;
s2, continuously releasing the dynamic flexible vertical pipe, and synchronously installing the floats;
s3, the working ship lowers the balancing weight into water, and the ROV is used for auxiliary connection of the head end of the dynamic flexible vertical pipe and the balancing weight;
s4, continuing to install the residual floats until the float sections of the dynamic flexible risers are installed, and moving the operation ship to the floating barrel position;
s5, the operation ship moves to the side position of the pontoon, the crane lifts the tail end traction head of the dynamic flexible vertical pipe into water, and the tail end traction head of the dynamic flexible vertical pipe is provided with a temporary suspension rigging;
s6, connecting the temporary suspension rigging to the bottom end of the pontoon for temporary suspension of the dynamic flexible vertical pipe by ROV underwater operation;
s7, the crane lifts the dynamic flexible vertical pipe to pass through the pipe protection port of the pontoon, the diver completes the assembly of the end flange of the dynamic flexible vertical pipe and the suspension flange at the top end of the pipe protection port of the pontoon, the suspension of the top of the pontoon of the dynamic flexible vertical pipe is completed, and the laying of the dynamic flexible vertical pipe when the whole FPSO is out of place is completed.
As a preferable technical scheme of the invention, in the step S1, a corrosion inhibitor is required to be added before the dynamic flexible vertical pipe is paved, water is injected in advance on land, and the wet storage condition of the dynamic flexible vertical pipe after paving is ensured.
In step S3, when the head end of the dynamic flexible riser reaches the depth of the ROV operable water, the crane needs to release the balancing weight from the working vessel, the balancing weight maintains the overall configuration of the dynamic flexible riser after the water is filled, and the laying operation of the dynamic flexible riser is suspended until the ROV completes the connection operation of the head end of the dynamic flexible riser and the balancing weight.
As a preferred embodiment of the present invention, in step S6, the temporary suspension operation of the dynamic flexible riser includes: s61, observing the reserved rigging position of the pontoon in water by an ROV, and lifting the tail end of the dynamic flexible vertical pipe to the reserved rigging by a crane, wherein the ROV is connected with the reserved rigging and the temporary suspension rigging; s62, slowly releasing the crane, and observing the reading by a crane operator until the force of the dynamic flexible vertical pipe is completely transferred to the reserved rigging; and S63, after the reserved rigging is completely stressed, the ROV releases the connection between the crane and the tail end of the dynamic flexible vertical pipe, and the dynamic flexible vertical pipe is temporarily suspended at the bottom of the pontoon.
As a preferred solution of the invention, in step S7, the dynamic flexible riser buoy top suspension work comprises: s71, a steel wire rope of the crane of the operation ship is lowered from the opening of the pontoon protection pipe to the bottom position, and an ROV is connected with the steel wire rope of the crane and the tail end dragging head of the dynamic flexible vertical pipe; s72, the ROV releases the connection between the reserved rigging and the temporary suspension rigging, and a crane steel wire rope starts to bear force; s73, maintaining the height of the crane, enabling an empty diving personnel to reach the bottom position of the pontoon, connecting the bottom of the pontoon with the dynamic flexible vertical pipe by using three groups of chain blocks, and transferring the force of the dynamic flexible vertical pipe to a chain block of the chain blocks; s74, transferring the temporary suspension rigging to the position of a mouth of a pipe at the top of the pontoon by an empty diving personnel, and starting to pull the dynamic flexible vertical pipe upwards by the crane; and S75, after the tail end of the dynamic flexible vertical pipe extends out of the pontoon protecting pipe orifice completely, assembling the suspension flange by a diver to complete the suspension of the top of the pontoon of the dynamic flexible vertical pipe.
As the preferable technical scheme of the invention, after the force of the dynamic flexible vertical pipe is transferred to the chain block chain, a diver operates the chain block chain under water, adjusts the relative position of the bending prevention device at the tail end of the dynamic flexible vertical pipe and the pipe protection port at the bottom of the pontoon, aligns the bending prevention device connector to the guide pipe flange and installs bolts, and the diver uses a hydraulic tensioner under water to fasten all the bolts according to the fastening value.
Compared with the prior art, the invention provides a dynamic hose laying method when an FPSO is out of place, which has the following beneficial effects:
the invention can independently complete the laying of the dynamic flexible stand pipes in a mode of not adding other auxiliary vessels, and the laying direction is from underwater to the direction of the pontoon. The method mainly completes the submarine wet storage at the head end of the dynamic flexible vertical pipe by using a balancing weight. And after the dynamic flexible vertical pipe is configured, hanging the dynamic flexible vertical pipe at the bottom of the pontoon. The operation ship and the air diver cooperate to complete the suspension of the tail end of the dynamic flexible vertical pipe at the top of the pontoon, the laying of the dynamic flexible vertical pipe when the whole FPSO is out of place is completed, and only the independent operation ship is needed, so that the whole construction process is safer due to small limiting factors such as weather windows and FPSO limit, and the offshore construction efficiency is greatly improved.
Drawings
FIG. 1 is a schematic flow chart of the present invention;
FIG. 2 is a schematic representation of the dynamic flexible riser laying process of the present invention;
FIG. 3 is a schematic view of the dynamic flexible riser connection buoy of the present invention.
The dynamic flexible vertical pipe is 1, the balancing weight is 2, the pontoon is 3, the temporary suspension rigging is 4, and the chain block is 5.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, an embodiment of the present invention provides a method for dynamically laying a hose when an FPSO is not in place, comprising the steps of:
s1, paving the head end of a dynamic flexible vertical pipe 1, and installing a floater on the dynamic flexible vertical pipe 1 when the dynamic flexible vertical pipe 1 is released to the position of a first floater mark;
s2, continuously releasing the dynamic flexible vertical pipe 1, and synchronously installing floats;
s3, the working ship lowers the balancing weight 2 into water, and the ROV is used for assisting in connecting the head end of the dynamic flexible vertical pipe 1 with the balancing weight 2;
s4, continuing to install the residual floats until the float section of the dynamic flexible vertical pipe 1 is installed, and moving the operation ship to the position of the pontoon 3;
s5, the operation ship moves to the side edge position of the pontoon 3, the crane lifts the tail end pulling head of the dynamic flexible vertical pipe 1 into water, and the tail end pulling head of the dynamic flexible vertical pipe 1 is provided with a temporary suspension rigging 4;
s6, connecting the temporary suspension rigging 4 to the bottom end of the pontoon 3 for temporary suspension of the dynamic flexible vertical pipe by ROV underwater operation;
s7, the crane lifts the dynamic flexible vertical pipe 1 to pass through the pipe protection port of the pontoon 3, the diver completes the assembly of the end flange of the dynamic flexible vertical pipe 1 and the suspension flange at the top end of the pipe protection port of the pontoon 3, the suspension of the top of the pontoon of the dynamic flexible vertical pipe is completed, and the laying of the dynamic flexible vertical pipe when the whole FPSO is out of place is completed.
In one embodiment of the present invention, in step S1, a corrosion inhibitor is required to be added before the dynamic flexible riser 1 is laid, and water is injected in advance on land, so as to ensure the wet condition of the dynamic flexible riser 1 after the laying.
In one embodiment of the present invention, in step S3, when the head end of the dynamic flexible riser 1 reaches the depth of the ROV operable water during the process of installing the float on the dynamic flexible riser 1, the crane needs to release the balancing weight 2 from the working vessel, the balancing weight 2 maintains the overall configuration of the dynamic flexible riser 1 after the water is filled into the water, and the laying operation of the dynamic flexible riser 1 is suspended until the ROV completes the connection operation of the head end of the dynamic flexible riser 1 and the balancing weight 2.
In one embodiment of the invention, in step S6, the temporary suspension operation of the dynamic flexible riser comprises: s61, observing the reserved rigging position of the pontoon 3 in water by an ROV, and lifting the tail end of the dynamic flexible vertical pipe 1 to the reserved rigging by a crane, wherein the reserved rigging and the temporary suspension rigging 4 are connected by the ROV; s62, slowly releasing the crane, and observing the reading by a crane operator until the force of the dynamic flexible vertical pipe 1 is completely transferred to the reserved rigging; and S63, after the reserved rigging is completely stressed, the ROV releases the connection between the crane and the tail end of the dynamic flexible vertical pipe 1, and the dynamic flexible vertical pipe is temporarily suspended at the bottom of the pontoon.
In one embodiment of the invention, in step S7, the dynamic flexible riser buoy top suspension operation comprises: s71, a steel wire rope of the crane of the operation ship is lowered from a pipe protection port of the pontoon 3 to a bottom position, and an ROV is connected with the steel wire rope of the crane and a tail end pulling head of the dynamic flexible vertical pipe 1; s72, the ROV releases the connection between the reserved rigging and the temporary suspension rigging 4, and a crane steel wire rope starts to bear force; s73, maintaining the height of the crane, enabling an empty diving personnel to reach the bottom position of the pontoon 3, connecting the bottom of the pontoon 3 with the dynamic flexible vertical pipe 1 by using three groups of chain blocks 5, and transferring the force of the dynamic flexible vertical pipe 1 to the chain blocks of the chain blocks 5; s74, transferring the temporary suspension rigging 4 to the position of a top pipe protection port of the pontoon 3 by an empty diving personnel, and starting to pull the dynamic flexible vertical pipe 1 upwards by the crane; and S75, after the tail end of the dynamic flexible vertical pipe 1 completely extends out of the pipe protection port of the pontoon 3, assembling a suspension flange by a diver to complete the suspension of the top of the pontoon of the dynamic flexible vertical pipe.
In one embodiment of the invention, after the force of the dynamic flexible riser 1 is transferred to the chain block 5 chain block, a diver operates the chain block 5 chain block under water, adjusts the relative position of the end bending stopper of the dynamic flexible riser 1 and the bottom pipe protection port of the pontoon 3, aligns the bending stopper connector to the guide pipe flange and installs bolts, and the diver uses the underwater hydraulic stretcher to fasten all the bolts according to the fastening value.
The present invention is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed within the scope of the present invention.
Claims (6)
1. A method of dynamic hose laying when an FPSO is not in place, comprising the steps of:
s1, paving the head end of a dynamic flexible vertical pipe (1), and installing a floater on the dynamic flexible vertical pipe (1) when the dynamic flexible vertical pipe (1) is released to the position of a first floater mark;
s2, continuously releasing the dynamic flexible vertical pipe (1), and synchronously installing floats;
s3, the working ship lowers the balancing weight (2) into water, and the ROV is used for assisting in connecting the head end of the dynamic flexible vertical pipe (1) with the balancing weight (2);
s4, continuing to install the residual floats until the float sections of the dynamic flexible vertical pipes (1) are installed, and moving the operation ship to the position of the pontoon (3);
s5, the operation ship moves to the side position of the pontoon (3), the crane lifts the tail end dragging head of the dynamic flexible vertical pipe (1) to enter water, and the temporary suspension rigging (4) is arranged on the tail end dragging head of the dynamic flexible vertical pipe (1);
s6, connecting the temporary suspension rigging (4) to the bottom end of the pontoon (3) for temporary suspension of the dynamic flexible vertical pipe by ROV underwater operation;
s7, the crane lifts the dynamic flexible vertical pipe (1) through the pipe protection port of the pontoon (3), the diver completes the assembly of the end flange of the dynamic flexible vertical pipe (1) on the top end suspension flange of the pipe protection port of the pontoon (3), the top suspension of the pontoon of the dynamic flexible vertical pipe is completed, and the laying of the dynamic flexible vertical pipe when the whole FPSO is out of place is completed.
2. A method of dynamic hose laying when an FPSO is out of place according to claim 1, wherein:
in the step S1, corrosion inhibitors are needed to be added before the dynamic flexible vertical pipes (1) are paved, water is injected in advance on land, and the wet storage condition of the dynamic flexible vertical pipes (1) after paving is ensured.
3. A method of dynamic hose laying when an FPSO is out of place according to claim 1, wherein:
in step S3, in the process of installing the float on the dynamic flexible riser (1), when the head end of the dynamic flexible riser (1) reaches the depth of water at which the ROV can operate, the crane needs to release the balancing weight (2) from the operation ship, the balancing weight (2) maintains the overall configuration of the dynamic flexible riser (1) after water is filled into the balancing weight (2), and the laying operation of the dynamic flexible riser (1) is suspended until the ROV completes the connection operation of the head end of the dynamic flexible riser (1) and the balancing weight (2).
4. A method of dynamic hose laying when an FPSO is out of place according to claim 1, wherein:
in step S6, the temporary suspension operation of the dynamic flexible riser comprises: s61, observing the reserved rigging position of the pontoon (3) in water by an ROV, and lifting the tail end of the dynamic flexible vertical pipe (1) to the reserved rigging by a crane, wherein the reserved rigging and the temporary suspension rigging (4) are connected by the ROV; s62, slowly releasing the crane, and observing the reading by a crane operator until the force of the dynamic flexible vertical pipe (1) is completely transferred to the reserved rigging; and S63, after the reserved rigging is completely stressed, the ROV releases the connection between the crane and the tail end of the dynamic flexible vertical pipe (1) to complete temporary suspension of the dynamic flexible vertical pipe at the bottom of the pontoon.
5. A method of dynamically hose laying when an FPSO is not in place, according to claim 4, wherein:
in step S7, the dynamic flexible riser buoy top suspension operation comprises: s71, a steel wire rope of the crane of the operation ship is lowered from a pipe protection port of the pontoon (3) to a bottom position, and an ROV is connected with the steel wire rope of the crane and a tail end tractor of the dynamic flexible vertical pipe (1); s72, the ROV releases the connection between the reserved rigging and the temporary suspension rigging (4), and a crane steel wire rope starts to bear force; s73, maintaining the height of the crane, enabling an empty diving person to reach the bottom position of the pontoon (3), connecting the bottom of the pontoon (3) with the dynamic flexible riser (1) by using three groups of chain blocks (5), and transferring the force of the dynamic flexible riser (1) to the chain block of the chain blocks (5); s74, transferring the temporary suspension rigging (4) to the position of a pipe protection port at the top of the pontoon (3) by an empty diving personnel, and starting the crane to pull the dynamic flexible vertical pipe (1) upwards; and S75, after the tail end of the dynamic flexible vertical pipe (1) extends out of the pipe protection port of the pontoon (3), assembling a suspension flange by a diver to complete the top suspension of the pontoon of the dynamic flexible vertical pipe.
6. A method of dynamically hose laying when an FPSO is not in place, according to claim 5, wherein:
after the force of the dynamic flexible vertical pipe (1) is transferred to the chain block (5), a diver operates the chain block (5) under water, adjusts the relative position of the end bending-preventing device of the dynamic flexible vertical pipe (1) and the bottom pipe protection port of the pontoon (3), aligns the bending-preventing device connector to the guide pipe flange and installs bolts, and the diver uses the underwater hydraulic stretcher to fasten all the bolts according to the fastening value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311730522.2A CN117722536A (en) | 2023-12-15 | 2023-12-15 | Dynamic hose laying method when FPSO is out of place |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311730522.2A CN117722536A (en) | 2023-12-15 | 2023-12-15 | Dynamic hose laying method when FPSO is out of place |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117722536A true CN117722536A (en) | 2024-03-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311730522.2A Pending CN117722536A (en) | 2023-12-15 | 2023-12-15 | Dynamic hose laying method when FPSO is out of place |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117722536A (en) |
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2023
- 2023-12-15 CN CN202311730522.2A patent/CN117722536A/en active Pending
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