CA2541542A1 - Composite riser with integrity monitoring apparatus and method - Google Patents

Composite riser with integrity monitoring apparatus and method Download PDF

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Publication number
CA2541542A1
CA2541542A1 CA002541542A CA2541542A CA2541542A1 CA 2541542 A1 CA2541542 A1 CA 2541542A1 CA 002541542 A CA002541542 A CA 002541542A CA 2541542 A CA2541542 A CA 2541542A CA 2541542 A1 CA2541542 A1 CA 2541542A1
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CA
Canada
Prior art keywords
strain
composite
riser
monitoring module
data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002541542A
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French (fr)
Other versions
CA2541542C (en
Inventor
Mamdouh M. Salama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ConocoPhillips Co
Original Assignee
Conocophillips Company
Mamdouh M. Salama
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Conocophillips Company, Mamdouh M. Salama filed Critical Conocophillips Company
Publication of CA2541542A1 publication Critical patent/CA2541542A1/en
Application granted granted Critical
Publication of CA2541542C publication Critical patent/CA2541542C/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/01—Risers

Abstract

An integrity monitoring system for monitoring degradation in a composite riser string. The system includes composite riser structures incorporating strain and vibration sensors to measure changes in the stiffness strain on a first orientation and on a second orientation. The system can also include monitoring modules attached to each individual riser and devices to transfer the data from the monitoring module to the surface controller. Additionally, the monitor system can provide for an alarm when predetermined warning limits are exceeded.

Claims (42)

1. A composite riser assembly comprising:
a surface platform for supporting composite risers;
at least one composite riser supported by said platform, at least one of said one composite risers having a first strain sensor affixed thereto;
a controller located at said surface platform;
said controller being in signal communication with said first strain sensors in said at least one composite riser; and said controller having a signal device capable of transmitting signals to and receiving signals from said first strain sensors in said at least one composite riser.
2. A riser assembly of claim 1 wherein said processor includes an output means to display the measured strain data.
3. A riser assembly of claim 1 wherein said controller has a memory device for storage of strain data.
4. A riser assembly of claim 1 wherein said controller compares measured strain data to a predetermined warning value.
5. A riser assembly of claim 1 wherein said first strain sensor is in a first orientation and further comprising a second strain sensor in at least one of said composite risers, said second sensor being in a second orientation.
6. A riser assembly of claim 1 wherein said strain sensor is selected from the group consisting of fiber optic strain gauges, magnetic strain gauges, vibrational sensors, and electrical resistance strain gauges.
7. A riser assembly of claim 1 wherein said signal communication is provided by a transmission line from said platform to said strain sensors.
8. A riser assembly of claim 1 wherein said signal communication is provided by acoustic modems.
9. A composite structure comprising:
an elongated composite structure defining an axis;
a first strain sensor associated with said composite structure at a first orientation relative to said axis to measure strain in the direction of said first orientation; and a second strain sensor associated with said composite structure at a second orientation relative to said axis to measure strain in the direction of said second orientation.
10. A composite structure of claim 9 wherein said first and second strain sensors are fiber optic.
11. A composite structure of claim 10 wherein said first and second strain sensors are embedded in said composite structure.
12. A composite structure of claim 9 wherein said first and second strain sensors are magnetic.
13. A composite structure of claim 10 wherein said strain sensors are selected from the group consisting of fiber optic strain gauges, magnetic strain gauges, vibrational sensors, and electrical resistance strain gauges.
14. A composite structure of claim 10 wherein said vibrational sensors are mounted to establish changes in the vibration signature in the first and second orientations.
15. A composite structure with monitoring device comprising:
an elongated composite structure defining an axis;
a first strain sensor affixed to said composite structure at a first orientation relative to said axis to measure strain in the direction of said first orientation;

a first strain monitoring module in signal communication with said first strain gauge for measuring strain;
said first strain monitoring module associated with said first strain sensors having~
a power source, a central processor unit, a signal device, and a communication device.
16. ~A composite structure of claim 15 wherein said module includes a storage means for storing strain data.
17. ~A monitoring module for use with a composite riser comprising:
an input means for inputting strain measurements from a first strain sensor;
a processor means for receiving said strain measurement data; and a communication means for transmitting the recorded strain data to a receiving unit.
18. ~A monitoring module for use with a composite riser comprising:
an input means for inputting strain measurements from a first strain sensor in a first orientation and from a second strain sensor in a second orientation;
a processor unit for recording said strain measurements from said strain gauges;
and communication means for outputting said recorded strain measurements.
19. ~A monitoring module of claim 18 wherein said processor unit includes a means to compare said strain measurement data to one or more predetermined warning limit.
20. ~A monitoring module of claim 18 wherein said processor unit includes a means to compute the ratio of the strain measurement data in either said first or second~
orientation to that in the other orientation.
21. ~A monitoring module of claim 20 wherein said processor unit includes a means to compare said strain measurement data to one or more predetermined warning limit.
22. ~A monitoring device for monitoring strain in a composite riser having at least one strain sensor in operative association therewith comprising:
means to receive strain measurements from at least one strain sensor;
means to store said strain measurement data and the time of measurement; and means to communicate said strain measurement data to a receiver.
23. ~A monitoring module of claim 22 further comprising:
means to compare said strain measurement data with a predetermined warning value; and means to transmit an alarm signal when said predetermined warning value is exceeded.
24. ~A system for monitoring strain in a composite riser having at least one strain associated therewith comprising:
a submersible vehicle having a recorder mounted thereon;
said recorder comprising a central processing unit, a communication means, a means to receive and record strain data received from said strain sensors associated with said composite riser.
25. ~A system of claim 24 further comprising:
a means to storage strain data in said recorder.
26. ~A system of claim 25 further comprising:
a means to generate a signal for transmission to said strain sensors in order to measure strain.
27. ~A method of monitoring strain in an underwater composite riser comprising:

providing a submersible vehicle with a recorder device;
sending a signal to a strain sensor attached to a composite riser from the recorder of said submersible vessel; and recording the response to said signal in said recorder device.
28. ~A method of monitoring strain is an underwater composite riser comprising:
sending a signal to a strain sensor in operative association with a composite riser;
receiving the response to the signal; and storing the response to the signal.
29. ~A method of claim 21 further comprising outputting of said response.
30. ~A method of monitoring strain in composite riser comprising:
providing a strain sensor in association with a composite riser;
providing a monitoring module on said composite riser;
placing said monitoring module in signal communication with said strain sensor;
and sending a strain measuring signal to said strain sensor.
31. ~A method of claim 30 further comprising:
transmitting the strain data from said monitoring module to the a surface receiver.
32. ~A method of claim 30 further comprising:
acoustically transmitting the strain data from said monitoring module to a surface receiver.
33. ~A method of claim 30 further comprising:
transmitting the strain data from said monitoring module to a submersible vehicle.
34. ~A monitoring module for use with a composite riser comprising:
a housing;

a mounting device adapted to mount said housing on a composite riser;
at least one strain gauge interface for providing a data interface for a strain gauge;
a processing device, disposed in said housing, for receiving data obtained from a strain gauge and for processing that received data in accordance with predetermined principles;
a storage device, connected to said processing device, for storing at least one of data obtained from a strain gauge and data processed by said processing device;
a communications interface, connected to said processing device, for transmitting data from said monitoring module to a receiver; and a power interface for receiving power from a power source.
35. A monitoring module of claim 34 further comprising a memory for storing instructions for controlling an operation of said processing device.
36. A monitoring module of claim 34 further comprising a command interface for transmitting and receiving command communications for controlling said monitoring module.
37. A monitoring module of claim 34 wherein said monitoring module comprises at least two strain gauge interfaces, each strain gauge interface for providing a data interface for a corresponding strain gauge.
38. A monitoring module of claim 35 wherein said memory additionally stores strain threshold data and wherein said instructions for controlling an operation of said processing device include instructions for controlling said processing device to compare strain data received via said at least one strain gauge interface to said strain threshold.
39. A monitoring module of claim 35 wherein said memory stores instructions for controlling an operation of said processing device.
40. A riser assembly of claim 1 wherein said composite riser has an elastic axial module of from 5 to 15 million pounds per square inch.
41. A composite structure of claim 9 wherein said elongated composite structure has an elastic axial module of from 5 to 15 million pounds per square inch.
42. A composite structure of claim 14 wherein said elongated composite structure has an elastic axial module of from 5 to 15 million pounds per square inch.
CA2541542A 2003-11-07 2004-11-02 Composite riser with integrity monitoring apparatus and method Expired - Fee Related CA2541542C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/704,079 US20050100414A1 (en) 2003-11-07 2003-11-07 Composite riser with integrity monitoring apparatus and method
US10/704,079 2003-11-07
PCT/US2004/036513 WO2005047641A1 (en) 2003-11-07 2004-11-02 Composite riser with integrity monitoring apparatus and method

Publications (2)

Publication Number Publication Date
CA2541542A1 true CA2541542A1 (en) 2005-05-26
CA2541542C CA2541542C (en) 2011-07-19

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US (2) US20050100414A1 (en)
CA (1) CA2541542C (en)
GB (1) GB2424436B (en)
NO (1) NO333789B1 (en)
WO (1) WO2005047641A1 (en)

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US7721611B2 (en) 2010-05-25
CA2541542C (en) 2011-07-19
US20080249720A1 (en) 2008-10-09
NO20062604L (en) 2006-08-07
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NO333789B1 (en) 2013-09-16
GB2424436B (en) 2007-10-24

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