CN115095713A - Method for installing distributed optical fiber sensor on vertical pipe of submarine oil pipeline - Google Patents
Method for installing distributed optical fiber sensor on vertical pipe of submarine oil pipeline Download PDFInfo
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- CN115095713A CN115095713A CN202210256686.5A CN202210256686A CN115095713A CN 115095713 A CN115095713 A CN 115095713A CN 202210256686 A CN202210256686 A CN 202210256686A CN 115095713 A CN115095713 A CN 115095713A
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- 238000004873 anchoring Methods 0.000 claims abstract description 23
- 230000000149 penetrating effect Effects 0.000 claims abstract description 11
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/16—Laying or reclaiming pipes on or under water on the bottom
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/20—Accessories therefor, e.g. floats, weights
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
Abstract
The invention discloses a method for installing a distributed optical fiber sensor on a submarine oil pipeline riser, which comprises the following parts: (1) aiming at the position where the vertical pipe is of a single-wall pipe structure, the distributed optical fiber sensor is arranged on the outer side of the pipe wall of the vertical pipe; the method comprises the following steps that a multi-piece type anti-icing protective pipe is welded on the outer side of a vertical pipe of the submarine oil pipeline, the protective pipe is embedded and welded at the joint of the multi-piece type anti-icing protective pipe, and distributed optical fiber sensors are arranged in the protective pipe; (2) aiming at the position that the vertical pipe is of a double-wall heat-preservation pipe structure, the distributed optical fiber sensor is arranged in a gap between the inner pipe wall and the outer pipe wall of the vertical pipe of the submarine oil pipeline, and (3) aiming at the condition that the two sides of the vertical pipe are of single-wall pipe structures and the main part of the vertical pipe is of a double-wall heat-preservation pipe structure, the anchoring part capable of penetrating through optical fibers is adopted to realize the transition between the single-wall pipe structure and the double-wall heat-preservation pipe structure. The invention achieves the purpose of ensuring the safety of the pipeline structure by improving the safety of the pipeline distributed optical fiber sensor in the seabed oil and gas pipeline riser.
Description
Technical Field
The invention relates to the technical field of structural health monitoring and ocean engineering, in particular to a method for installing a distributed optical fiber sensor on a submarine oil pipeline riser.
Background
Since the advent of distributed optical fiber sensors, the distributed optical fiber sensors have been developed in the field of structural health monitoring due to the advantages of high reliability, corrosion resistance, low transmission loss, long transmission distance, no electromagnetic interference and the like. Especially, the linear long-distance measurement characteristic of the optical fiber sensor makes the optical fiber sensor become one of ideal technologies for various pipeline safety monitoring. In the safety monitoring of oil and gas pipelines, the currently used optical fiber sensor technology mainly includes three types: fiber Bragg Grating (FBG) technology, distributed fiber temperature measurement technology, and distributed fiber strain monitoring technology. The Fiber Bragg Grating (FBG) technology can realize high-precision measurement of dynamic strain and temperature, is a relatively mature fiber monitoring technology at present, but still belongs to the traditional point type measurement category, and cannot meet the requirement of distributed monitoring of long-distance submarine pipelines. The distributed optical fiber temperature measurement technology realizes distributed detection and positioning of pipeline leakage by monitoring the abnormity of environmental temperature caused by oil gas leakage along the pipeline, but temperature measurement cannot provide any information of state degradation (such as structural damage, corrosion and the like) of the pipeline structure. The distributed optical fiber strain monitoring technology can provide strain (or stress) information of any position of the whole length of a pipeline, and provides first-hand information for pipeline structure state evaluation and safety early warning, but the technology requires that sensors are necessarily arranged on the structure, and the application of the distributed optical fiber strain monitoring technology in an oil and gas pipeline is still in a starting stage.
The submarine pipeline riser is a connection part between a submarine pipeline and a platform pipeline, is also the most complex part of the submarine pipeline, and needs to bear various severe sea conditions such as typhoon, billow, ocean current, sea ice and the like. Meanwhile, the submarine pipeline riser is also a key area for distributed optical fiber strain monitoring for submarine pipeline in-situ monitoring, and a carrier for laying distributed optical fibers from a flat pipe section to an oil-gas platform and a data processing terminal.
In order to ensure that the distributed optical fiber is smoothly laid on the ocean platform from the seabed, a method is adopted to ensure that the distributed optical fiber is safe on a riser and cannot be damaged after being subjected to long-term action of severe environments such as sea ice and the like.
Regarding the arrangement of the distributed optical fiber sensor in the steel riser of the submarine oil pipeline, the current research situation and patent situation at home and abroad can be analyzed, and at present, no patent related to the structure of the submarine oil pipeline riser for installing the distributed optical fiber sensor and the riser optical fiber installation method exists.
Disclosure of Invention
The invention aims to provide a method for installing a distributed optical fiber sensor on a submarine oil pipeline riser, which aims to solve the problems in the prior art and achieve the aim of ensuring the safety of a pipeline structure by improving the safety of the pipeline distributed optical fiber sensor in the submarine oil and gas pipeline riser.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a method for installing a distributed optical fiber sensor on a vertical pipe of a submarine oil pipeline, which comprises the following parts:
(1) aiming at the position where a vertical pipe of the submarine oil pipeline is of a single-wall pipe structure, the distributed optical fiber sensor is arranged on the outer side of the pipe wall of the vertical pipe
Laying ice-resistant section optical fibers of a vertical pipe of the submarine oil pipeline: welding a multi-piece anti-icing protective pipe on the outer side of a vertical pipe of the submarine oil pipeline, burying and welding a protective pipe at the joint of the multi-piece anti-icing protective pipe, and arranging a distributed optical fiber sensor in the protective pipe;
laying non-ice-resistant optical fibers of a vertical pipe of the submarine oil pipeline: the distributed optical fiber sensor is arranged on the outer surface of the submarine pipeline and adopts a closed-cell foam plate for external protection; the part above the ice-resistant section of the submarine oil pipeline riser is fixedly provided with a protective sleeve through bonding and binding bands, and the distributed optical fiber sensor is arranged in the protective sleeve;
(2) aiming at the position that the vertical pipe of the submarine oil pipeline is of a double-wall heat-preservation pipe structure, the distributed optical fiber sensor is arranged in a gap between the inner pipe wall and the outer pipe wall of the vertical pipe of the submarine oil pipeline
Arranging an anchoring piece between the inner wall and the outer wall of the double-wall heat-insulating pipe, wherein the anchoring piece is composed of a casting component which can be simultaneously connected with the inner wall and the outer wall of the double-wall heat-insulating pipe, and the anchoring piece is provided with a through hole for the distributed optical fiber sensor to pass through;
the distributed optical fiber sensor of the double-wall heat-preservation pipe section of the submarine oil pipeline vertical pipe is laid in a space between the inner wall and the outer wall in a bonding mode, and penetrates through the through hole at the position where the anchoring part is arranged to realize connection;
(3) aiming at the problems that two sides of a vertical pipe of the submarine oil pipeline are provided with single-wall pipe structures, the main body part of the vertical pipe of the submarine oil pipeline is provided with a double-wall heat-insulating pipe structure, an anchoring part capable of penetrating through optical fibers is adopted to realize the transition between the single-wall pipe structure and the double-wall heat-insulating pipe structure, a distributed optical fiber sensor is laid in a space between the inner wall and the outer wall of the double-wall heat-insulating pipe in a bonding mode, the position of the anchoring part arranged at the tail end of the double-wall heat-insulating pipe penetrates through a penetrating hole to be connected with the single-wall pipe structure on a platform, and the aim that the distributed optical fibers are laid from a flat pipe section of the submarine oil pipeline to the top of the platform is realized.
Preferably, the multi-piece ice-resistant protective pipe consists of 2-3 half-tile steel plates, and the wall thickness of the multi-piece ice-resistant protective pipe is 12-19 mm; the steel plate material of the multi-piece type anti-icing protective pipe is a D-grade or E-grade steel plate for the ship according to the conditions of the ground air temperature and the water temperature; the half-watt bending degree and the size of the multi-piece type anti-icing protective pipe are determined according to the outer diameter of a vertical pipe of the submarine oil pipeline.
Preferably, the wall thickness of the protective sleeve is 2-3mm, and the diameter is 10 mm.
Preferably, an insulating layer is filled between the inner wall and the outer wall of the double-wall insulating pipe.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the invention, through the design of the multi-piece type anti-icing protective pipe, the distributed optical fiber vertical pipe, the anchoring part capable of penetrating through the optical fiber and the installation method of the distributed optical fiber of the double-wall heat preservation pipe and the single-wall pipe, the optical fiber sensors are uniformly and safely distributed on the surface of the pipeline vertical pipe in a distributed manner, the safety of the distributed optical fiber sensors in the extreme ocean environment is ensured, the installation reliability of the distributed optical fiber sensors is improved, and thus positive significance is generated on the safety monitoring and early warning of the pipeline.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a riser location for installation of a distributed optical fiber;
FIG. 2 is a schematic view of the multi-piece ice protection tube and distributed fiber optic riser external installation;
FIG. 3 is a schematic diagram of a single-walled tube non-ice-worthy segment riser external distributed optical fiber installation method;
FIG. 4 is a schematic cross-sectional view of a method for installing distributed optical fibers in a riser of a double-walled insulating pipe;
FIG. 5 is a schematic view of an internal cross-over anchor for a double-walled insulating pipe installation distributed optical fiber method;
FIG. 6 is a schematic diagram of the transition between double-walled insulation pipe section internal installation and single-walled pipe section external installation of distributed optical fibers;
FIG. 7 is a schematic view of an anchor that can traverse an optical fiber;
FIG. 8 is a sectional view taken along line A-A of FIG. 7;
in the figure, 1 is a distributed optical fiber sensor; 2, a vertical pipe ice resisting section; 3, anchoring an element; 4, an inner pipe; 5, an anti-icing section lower vertical pipe; 6 riser support legs (or piles); 7, a multi-piece anti-icing protective pipe; 8 protecting the casing; 9 filling groove welding seams; 10 vertical pipes; 11, fixing the binding belt and the anti-collision foam plate layer by using the binding belt; 12 an outer tube; 13 an insulating layer; 14 single wall tube sections; 15 pass through the pores.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention aims to provide a method for installing a distributed optical fiber sensor on a submarine oil pipeline riser, which aims to solve the problems in the prior art and achieve the aim of ensuring the safety of a pipeline structure by improving the safety of the pipeline distributed optical fiber sensor in the submarine oil and gas pipeline riser.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-8, the present embodiment provides a method of installing a distributed fiber optic sensor on a subsea pipeline riser.
Although the distributed optical fiber sensor based on the brillouin scattering principle has sensing and transmission functions, the distributed optical fiber sensor is fragile and vulnerable, and cannot resist impact of loads such as ice load and the like, so that the optical fiber sensor arranged on the pipeline riser is protected through structural design, and is required to be convenient to install. According to the invention, through the structural design of the anti-icing pipe protecting layer of the submarine riser and the combination of the pipe penetrating construction process, the submarine oil pipeline riser structure capable of being provided with the distributed optical fiber sensor is formed, so that the distributed optical fiber can be safely arranged on the submarine oil and gas pipeline riser.
The technical scheme of the invention comprises the following steps:
the submarine pipeline is divided into a single-layer steel pipe submarine pipeline (namely, a single-wall pipe) and a double-layer steel pipe submarine pipeline with a heat-insulating layer added in the middle (namely, a double-wall heat-insulating pipe) due to different purposes, and the technical scheme is divided into a single-wall pipe scheme, a double-wall pipe scheme and an optical fiber integral installation method according to the two structural types.
Aiming at a single-wall pipe structure, a distributed optical fiber sensor 1 is arranged on the outer side of the pipe wall of a vertical pipe 10 and mainly comprises a multi-piece type anti-ice protection pipe 7, a protection pipe 8 and a single-wall submarine pipeline vertical pipe non-anti-ice section optical fiber arrangement method. The protective conduit 8 plays a role of protecting the distributed optical fiber sensor 1 and is arranged between gaps at the joint of the multi-piece type anti-icing protective pipe 7. The multi-piece anti-icing protective pipe 7 protects the protective pipe 8 from being damaged by external loads such as sea ice and the like, and the protective pipe 8 protects the optical fiber from being damaged by external loads such as wind waves and the like. The target that the distributed optical fiber sensor 1 is laid from the submarine pipeline flat pipe section to the top of the platform is achieved by adopting an integral installation scheme.
The submarine oil pipeline riser structure with the distributed optical fiber sensor 1 installed on the single-wall pipe and the integral installation method of riser optical fibers comprise the following parts:
(a) the multi-piece anti-icing protective pipe 7 is composed of 2-3 half-tile steel plates, the wall thickness is 12-19mm, D-grade or E-grade steel plates for ships are selected according to the conditions of local air temperature and water temperature, and the steel plates are uniformly welded on the outer pipe of the submarine pipeline. See figure 2 for details. The half watt bend and specific dimensions are determined by the pipe outside diameter. The multi-piece ice protection tube 7 may function to protect the riser 10 and the protective sleeve 8.
(b) And the protective sleeve 8 is 2-3mm in wall thickness and about 10mm in diameter, and is embedded and welded at the joint of the half-tile type anti-ice protective pipe. See figure 2 for details. Which may serve to protect the operation of the distributed optical fiber sensor 1.
(c) The method for laying the optical fibers of the non-ice-resistant section of the single-wall submarine pipeline riser comprises the steps that the part of the riser from the ice-resistant section 2 to the horizontal section of the submarine pipeline is laid on the outer surface of the submarine pipeline, and a closed-cell foam plate is adopted for external protection; the part above the ice-resistant section of the submarine pipeline riser is fixedly provided with a protective sleeve on the riser 10 through bonding and binding bands, and the distributed optical fiber sensor 1 is arranged in the protective sleeve to prevent collision damage in the construction process and damage to the submarine pipeline by environmental load in the operation process. The goal of laying the distributed optical fiber sensor 1 of the single-wall pipe submarine pipeline from the flat pipe section of the submarine pipeline to the top of the platform is realized through (a), (b) and (c).
Fig. 2 shows a structure diagram of a multi-piece ice-resistant protection pipe of a submarine oil pipeline riser and an external installation structure diagram of the distributed optical fiber riser, wherein the structure diagram is used for installing the distributed optical fiber sensor, the device consists of a multi-piece ice-resistant protection pipe 7 and a protective sleeve 8, and the distributed optical fiber sensor 1 is arranged in parallel along the pipeline by penetrating the protective sleeve 8 and is in close contact with the surface of the pipeline in a pouring mode. FIG. 3 shows a method for installing distributed optical fibers outside a single-wall pipe non-ice-resistant section riser, wherein distributed optical fiber sensors are arranged through a sleeve adhered to the outer surface of a submarine pipeline to realize arrangement along the riser and are in close contact with the surface of the pipeline in a pouring mode. According to protection needs, a closed-cell foam plate or a binding belt (or the closed-cell foam plate and the binding belt can be adopted simultaneously) is selected for external protection, so that collision damage in the construction process and damage to the submarine pipeline by environmental load in the operation process are prevented. The structure and method of fig. 2 and 3 are used to implement the external laying of the single-walled insulating pipe distributed pipeline through the riser 10 to the top of the ocean platform.
Secondly, aiming at the double-wall heat preservation pipe, the distributed optical fiber sensor 1 is arranged in a gap between the inner pipe wall and the outer pipe wall of the vertical pipe 10 and mainly comprises a novel submarine pipeline anchoring part 3 capable of penetrating through optical fibers and a double-wall pipe vertical pipe optical fiber arrangement method.
(a) The anchoring piece 3 capable of passing through the optical fiber consists of a casting component which can be simultaneously connected with the inner wall and the outer wall of the submarine pipeline, and a passing hole 15 is arranged between the connection of the inner wall and the outer wall of the submarine pipeline, so that the distributed optical fiber sensor 1 can realize the passing through of the anchoring piece of the double-walled pipe and the transition from the riser of the submarine pipeline to the installation position of the single-walled pipe of the near-platform section.
(b) The double-wall pipe riser optical fiber laying method is characterized in that the double-wall pipe section optical fiber of the submarine pipeline riser is laid in a space between the inner wall and the outer wall in a bonding mode, passes through the double-wall pipe section of the submarine pipeline riser through an anchoring part 3 capable of passing through the optical fiber and is connected with the single-wall pipe submarine pipeline on a platform. The aim of laying the distributed optical fiber from the submarine pipeline flat pipe section to the top of the platform is fulfilled.
Fig. 4 shows a method for installing the distributed optical fiber sensor 1 in the conventional section of the double-wall thermal insulation pipe riser, which utilizes the gap between the inner pipe 4 and the outer pipe 12, the protective sleeve 8 is fixed on the outer wall of the inner pipe 4 by bonding, the thermal insulation layer 13 is filled or wrapped between the inner pipe and the outer pipe, the distributed optical fiber sensor 1 is arranged in parallel along the pipeline by penetrating the protective sleeve and is in close contact with the surface of the inner pipe of the pipeline by filling, and finally reaches the top of the ocean platform through the riser 10. In order to limit the displacement between the inner pipe and the outer pipe of the double-wall heat-insulating pipe and realize heat insulation and separation, the double-wall pipe vertical pipe of the submarine pipeline needs to be provided with an anchoring part at a specific position, and the attached drawings 5, 6 and 7 show a method for installing the distributed optical fiber by the double-wall heat-insulating pipe and penetrating through the anchoring part 3 inside, so that the distributed optical fiber is communicated between the whole vertical pipe, and the comprehensive utilization of the method for installing the distributed optical fiber by using the transition type anchoring parts of the single-wall heat-insulating pipe and the double-wall heat-insulating pipe can be realized.
For the submarine pipeline with single-wall pipes on two sides of the vertical pipe 10 and the main part of the vertical pipe 10 being double-wall heat-insulating pipes, a first method and a second method can be comprehensively adopted, and the anchoring part 3 capable of passing through optical fibers is adopted to realize the transition between the two installation methods, which is shown in the detailed diagram of the transition of distributed optical fibers installed inside the double-wall heat-insulating pipe section and outside the single-wall pipe section in the attached figure 6; figure 1 shows a general arrangement and a partial schematic of a subsea pipeline riser installation distributed optical fibre. The distributed optical fiber is connected to the upper structures such as an ocean platform and the like through the submarine pipeline riser and finally reaches the terminal processor from the submarine pipeline flat section to the submarine pipeline vertical section, so that the submarine pipeline is monitored in place.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims should not be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; also, it will be apparent to those skilled in the art that variations may be made in the embodiments and applications without departing from the spirit of the invention. In view of the foregoing, the description should not be construed as limiting the invention.
Claims (4)
1. A method for installing a distributed optical fiber sensor on a riser of a submarine oil pipeline is characterized by comprising the following parts:
(1) aiming at the position where a vertical pipe of the submarine oil pipeline is of a single-wall pipe structure, the distributed optical fiber sensor is arranged on the outer side of the pipe wall of the vertical pipe
Laying ice-resistant section optical fibers of a vertical pipe of the submarine oil pipeline: welding a multi-piece anti-icing protective pipe on the outer side of a vertical pipe of the submarine oil pipeline, burying and welding a protective pipe at the joint of the multi-piece anti-icing protective pipe, and arranging a distributed optical fiber sensor in the protective pipe;
laying non-ice-resistant optical fibers of a vertical pipe of the submarine oil pipeline: the distributed optical fiber sensor is arranged on the outer surface of the submarine pipeline and adopts a closed-cell foam board for external protection; the part above the ice-resistant section of the submarine oil pipeline riser is fixedly provided with a protective sleeve through bonding and binding bands, and the distributed optical fiber sensor is arranged in the protective sleeve;
(2) aiming at the position of a submarine oil pipeline vertical pipe with a double-wall heat-preservation pipe structure, a distributed optical fiber sensor is arranged in a gap between the inner pipe wall and the outer pipe wall of the submarine oil pipeline vertical pipe
Arranging an anchoring piece between the inner wall and the outer wall of the double-wall heat-insulating pipe, wherein the anchoring piece is composed of a casting component which can be simultaneously connected with the inner wall and the outer wall of the double-wall heat-insulating pipe, and the anchoring piece is provided with a through hole for the distributed optical fiber sensor to pass through;
the distributed optical fiber sensor of the double-wall heat-preservation pipe section of the submarine oil pipeline vertical pipe is laid in a space between the inner wall and the outer wall in a bonding mode, and penetrates through the through hole at the position where the anchoring part is arranged to realize connection;
(3) aiming at the condition that two sides of a vertical pipe of the submarine oil pipeline are provided with single-wall pipe structures and the main body part of the vertical pipe of the submarine oil pipeline is provided with a double-wall heat-insulating pipe structure, an anchoring part capable of penetrating through optical fibers is adopted to realize the transition between the single-wall pipe structure and the double-wall heat-insulating pipe structure, a distributed optical fiber sensor is laid in a space between the inner wall and the outer wall of the double-wall heat-insulating pipe in a bonding mode, the anchoring part arranged at the tail end of the double-wall heat-insulating pipe penetrates through a penetrating hole and then is installed on the outer wall of the single-wall pipe structure on a platform, and the purpose that the distributed optical fiber sensor is laid from a flat pipe section of the submarine oil pipeline to the top of the platform is realized.
2. The method of installing a distributed fiber optic sensor on a subsea pipeline riser according to claim 1, wherein: the multi-piece anti-icing protective pipe consists of 2-3 half tile type steel plates, and the wall thickness of the multi-piece anti-icing protective pipe is 12-19 mm; the steel plate material of the multi-piece type anti-icing protective pipe is a D-grade or E-grade steel plate for the ship according to the conditions of the ground air temperature and the water temperature; the half-watt bending degree and the size of the multi-piece type anti-icing protective pipe are determined according to the outer diameter of a vertical pipe of the submarine oil pipeline.
3. The method of installing a distributed fiber optic sensor on a subsea pipeline riser according to claim 1, wherein: the wall thickness of the protective sleeve is 2-3mm, and the diameter of the protective sleeve is 10 mm.
4. The method of installing a distributed fiber optic sensor on a subsea pipeline riser according to claim 1, wherein: and an insulating layer is filled between the inner wall and the outer wall of the double-wall insulating pipe.
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| CN202210256686.5A CN115095713B (en) | 2022-03-16 | 2022-03-16 | Installation method of distributed optical fiber sensor on submarine oil pipeline riser |
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| CN202210256686.5A CN115095713B (en) | 2022-03-16 | 2022-03-16 | Installation method of distributed optical fiber sensor on submarine oil pipeline riser |
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| CA2775764A1 (en) * | 2009-10-05 | 2011-04-14 | Nkt Flexibles I/S | A flexible unbonded oil pipe system with an optical fiber sensor inside |
| CN207864792U (en) * | 2018-02-05 | 2018-09-14 | 邢台市焱森防腐保温工程有限公司 | A kind of direct-buried thermal insulation pipe with temperature monitoring |
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2022
- 2022-03-16 CN CN202210256686.5A patent/CN115095713B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050988A (en) * | 2007-05-18 | 2007-10-10 | 中国科学院上海光学精密机械研究所 | Distributive optical fiber oil leakage sensor system |
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