CN111188597B - Safety monitoring system and method for marine riser in soft suspension state - Google Patents
Safety monitoring system and method for marine riser in soft suspension state Download PDFInfo
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Abstract
The invention relates to a riser safety monitoring system and a method in a soft suspension state, wherein the system comprises a riser stress-strain monitoring system, a top flexible joint inclination angle monitoring system, a laser interference monitoring system, an information fusion center and a platform control center; the platform control center sends typhoon early warning instructions to each monitoring system when typhoon or other dangerous conditions exist near the platform; the stress-strain monitoring system of the information marine riser measures the stress-strain parameters of the marine riser in real time; the top flexible joint inclination angle monitoring system measures deflection angle parameters of a flexible joint at the top of the marine riser in real time; the laser interference monitoring system measures the central offset parameter of the marine riser in real time; the information fusion center compares each real-time measurement value with the parameter early warning value, and when the real-time measurement value is greater than the parameter early warning value, the information fusion center sends early warning information to the platform control center; the platform control center adjusts the speed and the direction of the platform. The invention can be widely applied to the petroleum pipeline monitoring field.
Description
Technical Field
The invention belongs to the field of petroleum pipeline monitoring, relates to the theories of sensor measurement, underwater signal detection, underwater sound signal wireless transmission and the like, and particularly relates to a system and a method for monitoring the safety of a marine riser in a soft suspension state.
Background
During drilling operations, the riser connects the drill ship (or floating vessel) to the subsea wellhead. When encountering a typhoon, the drill ship sometimes cannot continue to stay in place. As shown in fig. 1, if the typhoon path can be accurately predicted in advance, the riser can be disconnected from the bottom riser assembly (LMRP) to wellhead blowout preventer (BOP) connection and the upper deck recovered, and then the drilling vessel driven to a safe area. However, in ultra-deep sea areas, it takes several days to drill the well by recovering the entire riser before the typhoon and reconnecting it after the typhoon. Meanwhile, the recovery or lowering operation must be performed under good environmental conditions. And in the conventional platform avoiding mode, all the marine risers are recovered and drive away from a typhoon track, and the platform avoiding preparation time facing deep water, ultra-deep water and typhoon is insufficient. The requirement of ultra-deep water drilling operation is not met. To reduce downtime and reduce operational risks in harsh environments, suspending and evacuating risers on a drilling vessel is currently the main solution.
However, when the platform is evacuated in a soft suspension state, the suspended marine riser needs to be monitored in real time to ensure the safety of the whole platform and the marine riser, but a similar technology does not exist in China at present and needs to be further researched.
Disclosure of Invention
Aiming at the problem of safety monitoring of the soft suspension marine riser of the deepwater drilling well during typhoon, the invention aims to provide a system and a method for monitoring the safety of the marine riser in a soft suspension state, which can solve the problems of real-time monitoring and safe evacuation of the marine riser in the soft suspension state during various dangerous conditions such as typhoon and the like.
In order to achieve the purpose, the invention adopts the following technical scheme: a riser safety monitoring system in a soft suspension state comprises a riser stress-strain monitoring system, a top flexible joint inclination angle monitoring system, a laser interference monitoring system, an information fusion center and a platform control center; the platform control center sends a typhoon early warning instruction to the marine riser stress-strain monitoring system, the top flexible joint inclination angle monitoring system and the laser interference monitoring system when typhoon or other dangerous conditions exist near the drilling platform, so that the drilling platform enters an early warning mode; the stress-strain monitoring system of the marine riser measures the stress-strain parameters of the marine riser in real time and sends the parameters to the information fusion center; the top flexible joint inclination angle monitoring system measures deflection angle parameters of a flexible joint at the top of the marine riser in real time and sends the deflection angle parameters to the information fusion center; the laser interference monitoring system measures the center offset parameter of the marine riser in real time and sends the measured center offset parameter to the information fusion center; the information fusion center is used for comparing each received real-time measurement value with a preset parameter early warning value, and sending early warning information to the platform control center when the real-time measurement value is greater than the parameter early warning value; and the platform control center adjusts the speed and the direction of the drilling platform according to the early warning information.
Further, the stress-strain monitoring system of the marine riser comprises an optical fiber sensing subsystem and a demodulation subsystem; the optical fiber sensing subsystem comprises 4 FBG strain sensors and 1 FBG compensation sensor, each FBG strain sensor is used for measuring the strain of the marine riser in real time, and the FBG compensation sensors are used for measuring the temperature and the water pressure around the marine riser in real time; the demodulation subsystem comprises a control circuit, a light source, a demodulation module and a three-port circulator; the output end of the light source is connected with the port 1 of the three-port circulator, the port 2 of the three-port circulator is connected with each sensor in the optical fiber sensing subsystem through an optical fiber, the port 3 of the three-port circulator is connected with the input end of the demodulation module, and the output end of the demodulation module is connected with the control circuit.
Furthermore, the sensitive directions of the 4 FBG strain sensors are distributed at intervals of 90 degrees on the outer circumference of the section of the riser along the axial direction of the riser, and the FBG compensation sensors are close to the 4 FBG strain sensors.
Further, the top flexible joint inclination angle monitoring system comprises an inclination angle sensor, an RS232/RS485 converter and an RS485/RS232 converter; the dip angle sensor is arranged at the topmost marine riser in a soft suspension state and used for measuring deflection angle parameters of a flexible joint at the top of the marine riser in real time, and an obtained measurement result is sent to the RS232/RS485 converter; the RS232/RS485 converter converts the measurement data to obtain binary format data and then sends the binary format data to the RS485/RS232 converter; the RS485/RS232 converter sends data to the information fusion center; and the tilt angle sensor is powered by the information fusion center through a power line.
Further, the laser interference monitoring system comprises a distance measuring sensor group and a data processing unit; the distance measurement sensor group comprises first to fourth laser distance measurement sensors which are arranged on the outer wall of the marine riser at intervals, and the first to fourth laser distance measurement sensors are used for measuring the vertical distance between the outer wall of the marine riser and the reference surface of the drilling platform; the first laser ranging sensor, the second laser ranging sensor, the third laser ranging sensor, the fourth laser ranging sensor, the data processing unit and the data processing unit are connected through a communication bus, and a ModBus RTU communication protocol is adopted to communicate with the data processing unit; the data processing unit is integrated in one of the laser ranging sensors, and is used for calculating to obtain a center offset parameter of the marine riser according to the measured vertical distance between the outer wall of the marine riser and the reference surface of the drilling platform and sending the center offset parameter to the information fusion center.
Furthermore, the connecting line of the first laser ranging sensor and the third laser ranging sensor and the connecting line of the second laser ranging sensor and the fourth laser ranging sensor are two mutually orthogonal straight lines passing through the center of the marine riser respectively.
Further, the sampling frequency of each laser ranging sensor is 5 Hz.
In another aspect of the present invention, a monitoring method of a riser safety monitoring system in a soft suspension state is provided, which includes the following steps:
1) starting a typhoon early warning instruction: when typhoon or other dangerous conditions are close to a drilling platform, the platform control center sends a typhoon early warning instruction to a marine riser stress-strain monitoring system, a top flexible joint inclination angle monitoring system and a laser interference monitoring system, and the drilling platform enters an early warning mode;
2) the method comprises the steps that a marine riser stress-strain monitoring system collects marine riser stress-strain data in real time and calculates real-time stress-strain parameters of a marine riser;
3) the top flexible joint inclination angle monitoring system measures deflection angle parameters of a flexible joint at the top of the marine riser in real time to obtain an included angle between the flexible joint at the top of the marine riser and the vertical direction;
4) the laser interference monitoring system measures the vertical distance between the outer wall of the marine riser and the reference surface of the drilling platform in real time, and calculates the central offset parameter of the marine riser according to the real-time measurement result;
5) the marine riser stress-strain monitoring system, the top flexible joint inclination angle monitoring system and the laser interference monitoring system respectively transmit the distance measurement parameters to an information fusion center in real time, and the information fusion center performs early warning judgment according to the received real-time parameter measurement values;
6) and the platform control center adjusts the speed and the direction of the drilling platform according to the received early warning information.
Further, in step 4), a calculation formula of the center offset parameter of the riser is as follows:
wherein d1, d2, d3 and d4 are the measuring distances of the four laser ranging sensors respectively, R is the radius of the reference surface of the drilling platform, and R is the radius of the marine riser.
Further, in the step 5), the method for performing early warning judgment by the information fusion center according to the received real-time parameter measurement value includes the following steps:
5.1) respectively setting parameter early warning values of a marine riser optical fiber stress strain subsystem, a top corner sensing subsystem and a laser interference subsystem according to the bearing capacity or the safety condition of a drilling platform;
and 5.2) comparing the actual measurement values of the three subsystems with the parameter early warning value, and when the real-time measurement value is greater than the early warning value, the information fusion center sends early warning information to the platform control center.
Due to the adoption of the technical scheme, the invention has the following advantages: the invention provides a riser safety monitoring system in a soft suspension state. The stress condition and various parameters of the marine riser in the soft suspension state can be calculated in real time, and the safety monitoring of the marine riser in the suspension state is realized. The system has a certain feedback effect on the movement control of the platform, and is beneficial to the safe evacuation of the soft suspended marine riser and the drilling platform during typhoon. The development of the safety monitoring system of the marine riser in the soft suspension state can realize real-time monitoring on the state of the soft suspension marine riser, ensure that drilling operation is carried out safely and smoothly, avoid various dangerous conditions such as typhoon and the like, and has important economic and social significance on safe and efficient drilling operation and risk avoidance.
Drawings
FIG. 1 is a schematic view of a soft hang-off riser condition;
FIG. 2 is a block diagram of a riser stress-strain monitoring system according to the present invention;
FIG. 3 is a block diagram of a top flex joint tilt angle monitoring system of the present invention;
FIG. 4a is a laser ranging sensor group communication network of the present invention;
FIG. 4b is a schematic view of the deployment of the laser ranging sensor of the present invention on a riser;
FIG. 5 is a flow chart of the method of the present invention;
FIG. 6 is a cross-sectional view of a laser range sensor cluster of the present invention;
the reference numbers in the figures are as follows: 1. drilling a table surface; 2. hanging a wedge block; 3. a wire rope; 4. a conventional suspension chuck; 5. an inner ring sliding tray; 6. the outer ring is used for fixing the tray; 7. a guide rail; 8. a pulley and a piston rod; 9. a hydraulic cylinder; 10. a shunt housing; 11. a small-sized riser; 12. a single riser joint flange; 13. a conventional riser is single; 14. a downwound joint; 15. a lower riser assembly; 16. a blowout preventer system; 17. a wellhead system; 18. an FBG strain sensor; 19. an FBG compensation sensor; 20. a riser; 21. a control circuit; 22. a light source, 23 and a demodulation module; 24. a circulator; 25. a tilt sensor; 26. an RS232/RS485 converter; 27. an RS485/RS232 converter; 28. a ranging sensor group; 29. a data processing unit.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
The invention provides a riser safety monitoring system in a soft suspension state, which comprises a riser stress-strain monitoring system, a top flexible joint inclination angle monitoring system, a laser interference monitoring system, an information fusion center and a platform control center. The platform control center sends a typhoon early warning instruction to a marine riser stress-strain monitoring system, a top flexible joint inclination angle monitoring system and a laser interference monitoring system when typhoon or other dangerous conditions exist near the drilling platform, and the drilling platform enters an early warning mode; after receiving the typhoon early warning instruction, the stress-strain monitoring system of the marine riser measures the stress-strain parameters of the marine riser in real time and sends the stress-strain parameters to the information fusion center; after receiving a typhoon early warning instruction, the top flexible joint inclination angle monitoring system measures deflection angle parameters of a flexible joint at the top of the marine riser in real time and sends the deflection angle parameters to an information fusion center; after receiving the typhoon early warning instruction, the laser interference monitoring system measures the center offset parameter of the marine riser in real time and sends the measured center offset parameter to the information fusion center; the information fusion center is used for comparing each received real-time measurement value with a preset parameter early warning value, and sending early warning information to the platform control center when the real-time measurement value is greater than the parameter early warning value; and the platform control center adjusts the speed and the direction of the drilling platform according to the early warning information so as to ensure that the marine riser and the drilling platform are safely evacuated in a soft suspension state during typhoon.
Further, as shown in fig. 2, the riser stress-strain monitoring system includes a fiber optic sensing subsystem and a demodulation subsystem. The optical fiber sensing subsystem comprises 4 FBG strain sensors 18 and 1 FBG compensation sensor 19 which are sequentially connected in series, each FBG strain sensor 18 is used for measuring the strain of the marine riser 20 in real time, and each FBG compensation sensor 18 is used for measuring the temperature and the water pressure near the marine riser 20 in real time; the demodulation subsystem comprises a control circuit 21, a light source 22, a demodulation module 23 and a three-port circulator 24; the output end of the light source 22 is connected with the port 1 of the circulator 24, the port 2 of the circulator 24 is connected with the optical fiber sensing subsystem through an optical fiber, the port 3 of the circulator 24 is connected with the input end of the demodulation module 23, and the output end of the demodulation module 23 is connected with the control circuit 21. The demodulation module 23 performs detection, and obtains the center wavelength of each reflection spectrum by sampling the 5 FBG reflection spectra and performing corresponding signal processing and data analysis, thereby obtaining the wavelength drift amount of each sensor and further calculating the stress-strain parameter of the marine riser.
Furthermore, in the optical fiber sensing subsystem, the sensitive directions of the 4 FBG strain sensors 18 are distributed at intervals of 90 degrees on the outer circumference of the cross section of the riser 20 along the axial direction of the riser 20, and the FBG compensation sensors 19 are arranged close to the 4 FBG strain sensors 18.
Further, as shown in fig. 3, the top flexible joint inclination monitoring system comprises an inclination sensor 25, an RS232/RS485 converter 26 and an RS485/RS232 converter 27. The dip angle sensor 25 is arranged at the topmost marine riser in a soft suspension state and used for measuring deflection angle parameters of a flexible joint at the top of the marine riser in real time, and the obtained measurement result is sent to the RS232/RS485 converter 26; the RS232/RS485 converter 26 converts the measurement data to obtain data in binary format, and sends the data to the RS485/RS232 converter 27; the RS485/RS232 converter 27 sends the data to the information fusion center; the information fusion center supplies power to the tilt sensor 25 through a power line. The RS232/RS485 converter 26 and the RS485/RS232 converter 27 are arranged, so that long-distance information transmission is realized through format conversion, the reliability of information transmission is improved, and the device is more suitable for a drilling platform with a larger space.
Further, as shown in fig. 4a and 4b, the laser interference monitoring system includes a ranging sensor group 28 and a data processing unit 29. The ranging sensor group 28 comprises four laser ranging sensors, namely a first laser ranging sensor, a second laser ranging sensor and a third laser ranging sensor, which are arranged on the outer wall of the marine riser 20 at intervals, wherein each laser ranging sensor is used for measuring the vertical distance between the outer wall of the marine riser and the reference surface of the drilling platform; each laser ranging sensor is connected with the data processing unit through a communication bus and is communicated with the data processing unit by adopting a ModBus RTU communication protocol; the data processing unit 29 is integrated with one of the laser ranging sensors, and is configured to calculate a riser center offset parameter according to a measured vertical distance between the outer wall of the riser and a drilling platform reference surface, and transmit the riser center offset parameter to the information fusion center through the communication bus.
Furthermore, the connecting line of the first laser ranging sensor and the third laser ranging sensor and the connecting line of the second laser ranging sensor and the fourth laser ranging sensor are two mutually orthogonal straight lines passing through the center of the marine riser respectively.
Further, the sampling frequency of each laser ranging sensor is 5 Hz.
As shown in fig. 5, based on the above-mentioned riser safety monitoring system in the soft suspension state, the present invention further provides a riser safety monitoring method in the soft suspension state, which includes the following steps:
1) starting a typhoon early warning instruction: when typhoon or other dangerous conditions are close to a drilling platform, the platform control center sends a typhoon early warning instruction to the marine riser stress-strain monitoring system, the top flexible joint inclination angle monitoring system and the laser interference monitoring system, the drilling platform enters an early warning mode, and the drilling platform can be in a soft suspension state to evacuate a typhoon water area.
2) The stress-strain monitoring system of the marine riser collects stress-strain data of the marine riser in real time and calculates to obtain a real-time accurate stress-strain parameter F of the marine riser.
Specifically, the method comprises the following steps:
2.1) each FBG strain sensor respectively collects the wavelength data of the reflected narrow-band light wave as an initial wavelength, and preliminarily calculates the maximum stress and bending moment of the marine riser according to the initial wavelength drift amount, wherein the calculation method is a method known by persons skilled in the art, and the method is not repeated herein;
and 2.2) carrying out temperature and pressure compensation on the 4 FBG strain sensors according to the wavelength drift amount acquired by the compensation sensor, and calculating to obtain a real-time accurate stress-strain parameter F of the marine riser.
3) And the top flexible joint inclination angle monitoring system measures deflection angle parameters of the flexible joint at the top of the marine riser in real time to obtain an included angle theta between the flexible joint at the top of the marine riser and the vertical direction.
During typhoon, the drilling platform is in a moving state, so that the flexible joint at the top of the marine riser is greatly inclined, and the included angle theta between the flexible joint at the top of the marine riser and the vertical direction is measured by the inclination angle sensor.
4) And the laser interference monitoring system measures the vertical distance between the outer wall of the marine riser and the reference surface of the drilling platform in real time, and calculates the central offset parameter of the marine riser according to the real-time measurement result.
Fig. 6 is a cross-sectional view of a laser range sensor array. From the figure, the calculation formula of the offset of the marine riser from the vertical center is as follows:
wherein d1, d2, d3 and d4 are the measuring distances of the four laser ranging sensors respectively, R is the radius of the reference surface of the drilling platform, and R is the radius of the marine riser.
5) The marine riser stress-strain monitoring system, the top flexible joint inclination angle monitoring system and the laser interference monitoring system respectively transmit the distance measurement parameters to the information fusion center in real time, and the information fusion center performs early warning judgment according to the received real-time parameter values.
The optical fiber stress-strain subsystem transmits the calculated stress-strain parameter value F of the marine riser to the information fusion center in real time by adopting underwater acoustic communication, and the top corner sensing system and the laser interference subsystem both transmit the measured angle theta and the offset x and y to the information fusion center through cables by adopting an RS485 protocol. The information fusion center carries out early warning judgment according to the received real-time parameter measured value, and the judgment method comprises the following steps:
5.1) respectively setting parameter early warning values of a marine riser optical fiber stress strain subsystem, a top corner sensing subsystem and a laser interference subsystem according to the bearing capacity or the safety condition of a drilling platform;
and 5.2) comparing the actual measurement values of the three subsystems with the parameter early warning value, and when the real-time measurement value is greater than the early warning value, the information fusion center sends early warning information to the platform control center.
6) The information fusion center sends the early warning information to the platform control center, and the platform control center adjusts the speed and the direction of the drilling platform according to the received data, so that the occurrence of marine riser collision and other accidents is avoided.
A specific embodiment is given above, but the invention is not limited to the described embodiment. The basic idea of the present invention lies in the above solution, and it is obvious to those skilled in the art that it is not necessary to spend creative efforts to design various modified models, formulas and parameters according to the teaching of the present invention. Variations, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.
Claims (10)
1. The utility model provides a riser safety monitoring system under soft suspension state which characterized in that: the system comprises a marine riser stress-strain monitoring system, a top flexible joint inclination angle monitoring system, a laser interference monitoring system, an information fusion center and a platform control center;
the platform control center sends a typhoon early warning instruction to the marine riser stress-strain monitoring system, the top flexible joint inclination angle monitoring system and the laser interference monitoring system when typhoon or other dangerous conditions exist near the drilling platform, so that the drilling platform enters an early warning mode;
the stress-strain monitoring system of the marine riser measures the stress-strain parameters of the marine riser in real time and sends the parameters to the information fusion center;
the top flexible joint inclination angle monitoring system measures deflection angle parameters of a flexible joint at the top of the marine riser in real time and sends the deflection angle parameters to the information fusion center;
the laser interference monitoring system measures the center offset parameter of the marine riser in real time and sends the measured center offset parameter to the information fusion center;
the information fusion center is used for comparing each received real-time measured value with each corresponding preset parameter early warning value, and sending early warning information to the platform control center when the real-time measured value is greater than the parameter early warning value;
and the platform control center adjusts the speed and the direction of the drilling platform according to the early warning information.
2. The system of claim 1, wherein the riser safety monitoring system is in a soft-hang condition: the marine riser stress-strain monitoring system comprises an optical fiber sensing subsystem and a demodulation subsystem;
the optical fiber sensing subsystem comprises 4 FBG strain sensors and 1 FBG compensation sensor, each FBG strain sensor is used for measuring the strain of the marine riser in real time, and the FBG compensation sensors are used for measuring the temperature and the water pressure around the marine riser in real time;
the demodulation subsystem comprises a control circuit, a light source, a demodulation module and a three-port circulator; the output end of the light source is connected with the port 1 of the three-port circulator, the port 2 of the three-port circulator is connected with each sensor in the optical fiber sensing subsystem through an optical fiber, the port 3 of the three-port circulator is connected with the input end of the demodulation module, and the output end of the demodulation module is connected with the control circuit.
3. The system of claim 2, wherein the riser safety monitoring system is in a soft-hang condition: the sensitive direction of 4 FBG strain sensor is along riser axis direction, and the interval 90 degrees are arranged on the circumference of the cross-section of riser, FBG compensation sensor is close to 4 FBG strain sensor arranges.
4. The system of claim 1, wherein the riser safety monitoring system is in a soft-hang condition: the top flexible joint inclination angle monitoring system comprises an inclination angle sensor, an RS232/RS485 converter and an RS485/RS232 converter;
the dip angle sensor is arranged at the topmost marine riser in a soft suspension state and used for measuring deflection angle parameters of a flexible joint at the top of the marine riser in real time, and an obtained measurement result is sent to the RS232/RS485 converter;
the RS232/RS485 converter converts the measurement data to obtain binary format data and then sends the binary format data to the RS485/RS232 converter;
the RS485/RS232 converter sends data to the information fusion center;
and the tilt angle sensor is powered by the information fusion center through a power line.
5. The system of claim 1, wherein the riser safety monitoring system is in a soft-hang condition: the laser interference monitoring system comprises a distance measuring sensor group and a data processing unit;
the distance measurement sensor group comprises first to fourth laser distance measurement sensors which are arranged on the outer wall of the marine riser at intervals, and the first to fourth laser distance measurement sensors are used for measuring the vertical distance between the outer wall of the marine riser and the reference surface of the drilling platform;
the first laser ranging sensor, the second laser ranging sensor, the third laser ranging sensor, the fourth laser ranging sensor, the data processing unit and the data processing unit are connected through a communication bus, and a ModBus RTU communication protocol is adopted to communicate with the data processing unit; the data processing unit is integrated in one of the laser ranging sensors, and is used for calculating to obtain a center offset parameter of the marine riser according to the measured vertical distance between the outer wall of the marine riser and the reference surface of the drilling platform and sending the center offset parameter to the information fusion center.
6. The system of claim 5, wherein the riser safety monitoring system is in a soft-hang condition: and the connecting line of the first laser ranging sensor and the third laser ranging sensor and the connecting line of the second laser ranging sensor and the fourth laser ranging sensor are two mutually orthogonal straight lines passing through the center of the marine riser respectively.
7. The system of claim 5, wherein the riser safety monitoring system is in a soft-hang condition: the sampling frequency of each laser ranging sensor is 5 Hz.
8. A riser safety monitoring method using the riser safety monitoring system in a soft-suspended state according to any one of claims 1 to 7, comprising the steps of:
1) starting a typhoon early warning instruction: when typhoon or other dangerous conditions are close to a drilling platform, the platform control center sends a typhoon early warning instruction to a marine riser stress-strain monitoring system, a top flexible joint inclination angle monitoring system and a laser interference monitoring system, and the drilling platform enters an early warning mode;
2) the method comprises the steps that a marine riser stress-strain monitoring system collects marine riser stress-strain data in real time and calculates real-time stress-strain parameters of a marine riser;
3) the top flexible joint inclination angle monitoring system measures deflection angle parameters of a flexible joint at the top of the marine riser in real time to obtain an included angle between the flexible joint at the top of the marine riser and the vertical direction;
4) the laser interference monitoring system measures the vertical distance between the outer wall of the marine riser and the reference surface of the drilling platform in real time, and calculates the central offset parameter of the marine riser according to the real-time measurement result;
5) the method comprises the steps that a stress-strain monitoring system of a marine riser, a top flexible joint inclination angle monitoring system and a laser interference monitoring system respectively transmit real-time stress strain parameters of the marine riser, an included angle between a flexible joint at the top of the marine riser and the vertical direction and central offset parameters of the marine riser to an information fusion center in real time, and the information fusion center carries out early warning judgment according to received real-time parameter measured values;
6) and the platform control center adjusts the speed and the direction of the drilling platform according to the received early warning information.
9. The riser safety monitoring method of claim 8, wherein: in step 4), a calculation formula of the central offset parameter of the riser is as follows:
wherein d1, d2, d3 and d4 are the measuring distances of the four laser ranging sensors respectively, R is the radius of the reference surface of the drilling platform, and R is the radius of the marine riser.
10. The riser safety monitoring method of claim 8, wherein: in step 5), the method for performing early warning judgment by the information fusion center according to the received real-time parameter measurement value comprises the following steps:
5.1) respectively setting parameter early warning values of a marine riser optical fiber stress strain subsystem, a top corner sensing subsystem and a laser interference subsystem according to the bearing capacity or the safety condition of a drilling platform;
and 5.2) comparing the measured values of the three subsystems with the parameter early warning value, and when the measured values are greater than the early warning value, the information fusion center sends early warning information to the platform control center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911405768.6A CN111188597B (en) | 2019-12-31 | 2019-12-31 | Safety monitoring system and method for marine riser in soft suspension state |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162769A (en) * | 2011-01-05 | 2011-08-24 | 中国海洋石油总公司 | Fatigue multi-point wireless monitoring system of marine riser |
| CN102901560A (en) * | 2012-10-24 | 2013-01-30 | 天津亿利科能源科技发展股份有限公司 | Safe comprehensive monitoring system for structure of offshore jacket platform |
| CN203097850U (en) * | 2012-12-25 | 2013-07-31 | 中国海洋石油总公司 | Emergency release device of deep water drilling riser |
| CN105259017A (en) * | 2015-11-03 | 2016-01-20 | 西南石油大学 | Deepwater drilling soft hanging riser typhoon-avoidance mechanical behavior test system and test method thereof |
| CN105424389A (en) * | 2015-11-03 | 2016-03-23 | 西南石油大学 | Mechanical typhoon avoidance behavior simulated test device and method for hard suspended marine riser of deepwater drilling platform |
| CN109094747A (en) * | 2018-08-02 | 2018-12-28 | 中国海洋石油集团有限公司 | The efficient anti-method of deepwater drilling platform |
| CN109307584A (en) * | 2018-11-28 | 2019-02-05 | 西南石油大学 | A kind of device for simulating marine riser stress when deepwater drilling platform keeps away platform |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002088516A1 (en) * | 2001-04-30 | 2002-11-07 | Shell Internationale Research Maatschappij B.V. | Subsea drilling riser disconnect system and method |
| US20090078425A1 (en) * | 2007-09-25 | 2009-03-26 | Seahorse Equipment Corp | Flexible hang-off arrangement for a catenary riser |
| NO333849B1 (en) * | 2010-04-28 | 2013-09-30 | Statoil Petroleum As | Safety device and method for protecting the well barrier. |
| WO2015168432A1 (en) * | 2014-04-30 | 2015-11-05 | Seahorse Equipment Corp | Bundled, articulated riser system for fpso vessel |
| US10168253B2 (en) * | 2014-05-30 | 2019-01-01 | General Electric Company | Marine riser management system including subsea acoustic monitoring platform and an associated method |
| CN107614824B (en) * | 2014-12-16 | 2021-04-02 | 阿斯平肯普控股公司 | Anti-recoil control design using hybrid riser tension adjustment system in deepwater drilling |
| WO2017065961A1 (en) * | 2015-10-15 | 2017-04-20 | Schlumberger Technology Corporation | Intelligent drilling riser |
-
2019
- 2019-12-31 CN CN201911405768.6A patent/CN111188597B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162769A (en) * | 2011-01-05 | 2011-08-24 | 中国海洋石油总公司 | Fatigue multi-point wireless monitoring system of marine riser |
| CN102901560A (en) * | 2012-10-24 | 2013-01-30 | 天津亿利科能源科技发展股份有限公司 | Safe comprehensive monitoring system for structure of offshore jacket platform |
| CN203097850U (en) * | 2012-12-25 | 2013-07-31 | 中国海洋石油总公司 | Emergency release device of deep water drilling riser |
| CN105259017A (en) * | 2015-11-03 | 2016-01-20 | 西南石油大学 | Deepwater drilling soft hanging riser typhoon-avoidance mechanical behavior test system and test method thereof |
| CN105424389A (en) * | 2015-11-03 | 2016-03-23 | 西南石油大学 | Mechanical typhoon avoidance behavior simulated test device and method for hard suspended marine riser of deepwater drilling platform |
| CN109094747A (en) * | 2018-08-02 | 2018-12-28 | 中国海洋石油集团有限公司 | The efficient anti-method of deepwater drilling platform |
| CN109307584A (en) * | 2018-11-28 | 2019-02-05 | 西南石油大学 | A kind of device for simulating marine riser stress when deepwater drilling platform keeps away platform |
Non-Patent Citations (5)
| Title |
|---|
| 南海深水钻井平台悬挂隔水管撤离防台分析;许亮斌;《中国海上油气》;20151117;全文 * |
| 台风应急期间深水钻井隔水管悬挂撤离安全分析;盛磊祥;《石油钻探技术》;20150725;全文 * |
| 基于隔水管受力分析的深水钻井平台防台风措施优选;宋宇;《石油钻采工艺》;20150120;全文 * |
| 深水钻井隔水管关键技术研究进展;周建良;《中国海上油气》;20180822;全文 * |
| 超深水钻井隔水管设计影响因素;畅元江;《石油勘探与开发》;20090823;全文 * |
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