NL2030951B1 - Rapid fixing device of optical fiber sensor for deep-sea mixed transportation riser and laying method - Google Patents
Rapid fixing device of optical fiber sensor for deep-sea mixed transportation riser and laying method Download PDFInfo
- Publication number
- NL2030951B1 NL2030951B1 NL2030951A NL2030951A NL2030951B1 NL 2030951 B1 NL2030951 B1 NL 2030951B1 NL 2030951 A NL2030951 A NL 2030951A NL 2030951 A NL2030951 A NL 2030951A NL 2030951 B1 NL2030951 B1 NL 2030951B1
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- NL
- Netherlands
- Prior art keywords
- optical fiber
- sensor
- riser
- clamp
- fiber sensor
- Prior art date
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000009434 installation Methods 0.000 claims abstract description 19
- 238000003825 pressing Methods 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 14
- 239000000835 fiber Substances 0.000 claims description 5
- 230000008093 supporting effect Effects 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000012544 monitoring process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/4471—Terminating devices ; Cable clamps
- G02B6/44785—Cable clamps
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2/00—Friction-grip releasable fastenings
- F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
- F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/3537—Optical fibre sensor using a particular arrangement of the optical fibre itself
- G01D5/35374—Particular layout of the fiber
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/50—Flanged connections
- F16B2200/506—Flanged connections bolted or riveted
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
UITTREKSEL A rapid fixing device of an optical fiber sensor for a deep—sea mixed transportation riser and a laying method are provided. The laying method comprises three stages: preparation before installation, rapid installation, and integrated laying; 5 specifically as follows: firstly determining positions and spacings of optical fiber sensors according to a sea trial scheme, burning stress or vibration sensor grating points at the corresponding positions of an optical fiber cable, and fixing the sensors to clamp fixing devices through sensor fixing devices; 10 secondly, hoisting a riser, and rapidly fixing two clamps to the mixed transportation riser through bolted connection; and finally, integrally lowering the riser and the sensor devices. (+ Fig. l) 15
Description
P1125/NLpd
RAPID FIXING DEVICE OF OPTICAL FIBER SENSOR FOR DEEP-SEA MIXED
TRANSPORTATION RISER AND LAYING METHOD
The present disclosure relates to a rapid fixing device of an optical fiber sensor for a deep-sea mixed transportation riser and a laying method, which can achieve installation and recovery of the optical fiber sensor and effectively improve the overall in- stallation efficiency.
Among the globally proven offshore oil-gas resources, there are huge resource reserves in deep-water/ultra-deep-water sea are- as, which has prompted offshore oil-gas development to move to- wards deep water/ultra-deep water. For example, oil and gas re- sources in the seabed at water depths of over 1,000 meters account for more than 90% of the total reserves. As a critical facility for deep-water oil-gas development, in addition to being affected by severe environments such as complex currents, seawater corro- sion and typhoon and the like for a long time, the deep water mixed transportation riser also needs to resist ultra-high water pressure, which is extremely prone to fatigue accumulated damage during operation; once the structure is damaged, huge economic damage is inevitably caused, and the safety of operating personnel is seriously affected, thus the health monitoring problem of the deep-sea mixed transportation riser has gradually attracted the attention of the industry.
In recent years, due to the advantages of high linearity, high sensitivity and long-distance signal transmission, the dis- tributed optical fiber technology is extensively applied into tem- perature, strain/strain monitoring of the practical engineering structures, and also provides reliable technical support for the health monitoring of the deep-sea mixed transportation equipment.
By arranging strain, vibration and other optical fiber sensors on a deep-sea mixed transportation riser, dynamic characteristic re-
sponse of the riser structure in the deep-sea mining process can be displayed in real time, and state monitoring/early warning of the deep-sea mixed transportation riser can be achieved by con- structing a related state monitoring/early-warning technology.
Deep-water/ultra-deep-water sea areas are severe in marine envi- ronment and short in sea trial window period, and thus, how to achieve rapid installation and laying of optical fiber sensors is a major problem limiting the monitoring of the deep-sea mixed transportation riser.
An existing fiber optic sensor is fixed by being adhered to the surface of the structure and pre-embedded inside the struc- ture. Such method has the defect that the test transmission of the whole optical fiber cable is directly affected when a certain op- tical fiber sensor fails, resulting to the failure of the whole test equipment. Meanwhile, such method has extreme difficulty in maintenance and replacement of the sensor. There is an urgent need to provide a rapid and efficient fixing and laying scheme of the optical fiber sensor to achieve rapid laying and recovery of the deep-sea mixed transportation riser, thus guaranteeing the safety of the optical fiber sensor, and improving fixation and laying ef- ficiency.
For overcoming the defects existing in adhering or pre- embedding a sensor in the prior art, a fixing device of an optical fiber sensor for a deep-sea mixed transportation riser is provid- ed.
The present disclosure is achieved by adopting the following technical solutions: a rapid fixing device of an optical fiber sensor for a deep-sea mixed transportation riser comprises an op- tical fiber cable provided with the optical fiber sensor, a sensor fixing device, and a clamp fixing device; the sensor fixing device comprises a lower supporting block and an upper pressing block, and the lower supporting block is fixed to the outer arc surface of the clamp fixing device; the lower supporting block and the upper pressing block are respectively provided with a lower supporting block groove and an upper pressing block groove, and inner surfaces of the lower sup- porting block groove and the upper pressing block groove are closely attached to the outer surface of the optical fiber cable.
Further, the clamp fixing device comprises two semi-circular metal clamps, an edge of the semi-circular metal clamp is provided with a flange in which screw holes are formed, and fixed connec- tion of the two metal clamp fixing devices is achieved through high-strength bolts.
Further, the lower supporting block and the upper pressing block are provided with corresponding screw holes, and rapid fixa- tion of the optical fiber sensor is achieved through bolted con- nection.
Further, one side of the metal clamp fixing device is con- nected through a hinge, and the other side of the metal clamp fix- ing device is connected through a lock catch structure.
The present disclosure further provides a laying method of a rapid fixing device of an optical fiber sensor for a deep-sea mixed transportation riser, which comprises the following steps: (1) the stage of preparation before installation: determining positions, spacings and types of optical fiber sensors of a sea trial scheme, burning optical fiber sensor grating points of strain or vibration or other designated types at corresponding po- sitions of the optical fiber cable, and fixing the sensors to clamp fixing devices through the sensor fixing devices; {2) the stage of rapid installation: rapidly fixing the clamp fixing device to the mixed transportation riser through bolted connection; (3) the stage of integrated laying: integrally lowering the mixed transportation riser and the sensor fixing device.
Compared with the prior art, the solution provided by the present disclosure has the advantages and beneficial effects that: the optical fiber cable with the optical fiber sensors is fixed to the riser through the clamp fixing devices and the sensor fixing devices to achieve rapid installation and fixation of the optical fiber sensors, the problems that the operation time of ad- hering the sensors on a sea trial site is long, and pre-embedded optical fiber sensors are prone to being damaged are solved. Mean-
while, the design of the structure and the laying method not only can achieve rapid installation, fixation and integrated laying and recovery of the optical fiber sensors, but also can effectively reduce construction difficulty, improve construction efficiency, and guarantee the safety of the constructors.
FIG. 1 is a diagram of a laying process in accordance with an embodiment of the present disclosure;
FIG. 2 is a diagram of a stage of preparation before instal- lation in the laying process in accordance with an embodiment of the present disclosure;
FIG. 3 is a diagram of a stage of rapid installation in the laying process in accordance with an embodiment of the present disclosure;
FIG. 4 is a diagram of a stage of integrated lowering in ac- cordance with an embodiment of the present disclosure;
FIG. 5 is an installation diagram of an optical fiber sensor fixing device and a clamp fixing device in accordance with an em- bodiment of the present disclosure;
FIG. 6 is a diagram of the optical fiber sensor fixing device in accordance with an embodiment of the present disclosure;
FIG. 7 is a diagram of a lower supporting block in FIG. 5;
FIG. 8 is a diagram of an upper pressing block in FIG. 5;
FIG. 9 is a diagram of the clamp fixing device in accordance with an embodiment of the present disclosure;
In the drawings, l-optical fiber cable; 2-sensor fixing de- vice; 3-clamp fixing device; 4-lower supporting block; 22-upper pressing block; 211-lower supporting block groove; 221-upper pressing block groove.
To understand the objective, the features and the advantages of the present disclosure more clearly, the present disclosure is further described below in conjunction with the accompanying draw- ings and the embodiments. While numerous specific details are set forth in the following description to provide a thorough under-
standing of the present disclosure, the present disclosure may be implemented otherwise than as described herein, and the solution is therefore not limited to the specific embodiments disclosed be- low. 5 Embodiment 1, the embodiment provides a rapid fixing device of an optical fiber sensor for a deep-sea mixed transportation riser, as shown in FIG. 5 and FIG. 6, which comprises an optical fiber cable 1, a sensor fixing device 2, and a clamp fixing device 3; grating points (optical fiber sensors) are burnt in the optical fiber cable 1 to measure strain/strain data of the mixed transpor- tation riser; the sensor fixing device 2 comprises a lower sup- porting block 21 and an upper pressing block 22, and the lower supporting block 21 is fixed to the outer arc surface of the clamp fixing device 3; as shown in FIG. 7 and FIG. 8, the lower support- ing block 21 and the upper pressing block 22 are respectively pro- vided with a lower supporting block groove 211 and an upper press- ing block groove 221, and inner surfaces of the lower supporting block groove 211 and the upper pressing block groove 221 are closely attached to the outer surface of the optical fiber cable 1; and the lower supporting block 21 and the upper pressing block 22 are provided with corresponding screw holes, and rapid fixation of the optical fiber sensor is achieved through bolted connection.
Referring to FIG. 9, in the embodiment, the clamp fixing de- vice 3 comprises two semi-circular metal clamps; the edge of the semi-circular metal clamp is provided with a flange in which screw holes are formed, and fixed connection of the two metal clamp fix- ing devices is achieved through high-strength bolts.
In additional to above bolted connection mode, one side of each of the two semicircular metal clamps of the metal clamp fix- ing device 3 can also be connected by adopting other connecting modes, for example, one side of the clamp fixing device is hinged through a hinge and other connecting structures, and the other side of the clamp fixing device is rapidly fixed through a lock catch structure and the like; and the lock catch structure and the hinge are directly purchased products, which are extensively ap- plied in the prior art and will not be described in detail here.
Similarly, for the lower supporting block 21 and the upper press-
ing block 22, in addition to the bolted connection mode, other modes can also be used for the connection, for example, one side of the lower supporting block 21 and one side of the upper press- ing block 22 are hinged, the other side of the lower supporting block and the other side of the upper pressing block can be opened, and then the lower supporting block 21 and the upper pressing block 22 can be fixed after the optical fiber cable 1 is positioned.
Embodiment 2, for the rapid fixing device of the optical fi- ber sensor provided by the embodiment 1, the further description is made below in conjunction with the laying process of the fixing device. As shown in FIG. 1 to FIG. 4, the laying process comprises three stages: preparation before installation, rapid installation, and integrated laying: (1) the stage of preparation before installation: determining positions, spacings and types of the optical fiber sensors accord- ing to a sea trial scheme, burning optical fiber sensor grating points of strain or vibration and other designated types at corre- sponding positions of the optical fiber cable, and fixing the sen- sors to the clamp fixing devices through the sensor fixing devic- es; during operation, driving a ship for installation to an oper- ation sea area, and mooring and positioning; installing a quick connector of the riser at a preset height above a deck through hole of the ship for installation; hoisting the riser through a deck crane to make the axis of the riser and the axis of an in- stalling hole of a guick coupling device be located on the same vertical line, slowly lowering the riser, and stopping lowering until a lower connector of a to-be-installed riser is just in butt joint with an upper connector of the installed riser, and starting the quick coupling device to achieve rapid connection of the to- be-installed riser and the installed riser; (2) the stage of rapid installation: rapidly fixing two clamps (3) to the mixed transportation riser through bolted con- nection; and (3) the stage of integrated laying: integrally laying the riser and the sensor fixing device; lowering the riser by using the deck crane, wherein the optical fiber cable is lowered along with the riser; and stopping lowering when the upper connector of the riser is lowered to a preset height distancing from the deck, evacuating the deck crane and restoring to a position before in- stallation, thus preparing for the laying of the next riser and the fixing device.
The above is only a preferred embodiment of the present dis- closure and is not intended to limit the present disclosure in other forms, and any skilled person familiar with the present dis- closure may utilize the above disclosed technical content to change or modify an equivalent embodiment with equivalent changes to be applied to other fields. However, without departing from the content of the technical scheme of the present disclosure, any simple modifications, equivalent changes, and adaptations to the above embodiments according to the technical essence of the pre- sent disclosure still belong to the scope of protection of the technical solution of the present disclosure.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2030951A NL2030951B1 (en) | 2022-02-15 | 2022-02-15 | Rapid fixing device of optical fiber sensor for deep-sea mixed transportation riser and laying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2030951A NL2030951B1 (en) | 2022-02-15 | 2022-02-15 | Rapid fixing device of optical fiber sensor for deep-sea mixed transportation riser and laying method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL2030951B1 true NL2030951B1 (en) | 2023-08-21 |
Family
ID=87654427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2030951A NL2030951B1 (en) | 2022-02-15 | 2022-02-15 | Rapid fixing device of optical fiber sensor for deep-sea mixed transportation riser and laying method |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL2030951B1 (en) |
-
2022
- 2022-02-15 NL NL2030951A patent/NL2030951B1/en active
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