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Technology
Assessment & Research (TA&R) Program
| Project Number |
558 |
| Date of Summary |
September 12, 2007 |
| Subject |
Composite Repair Methods
for Steel Pipes |
| Performing Activity |
Offshore Technology Research Center (sub contracted to Stress Engineering
Services) |
| Principal Investigator |
Dr. Ochoa (OTRC), Chris Alexander (SES) |
| Contracting Agency |
Minerals Management Service |
| Estimated Completion |
Completed |
| Description |
The primary purpose of this program is to assess the existing technologies
and practices of using composite materials to repair offshore corroded
sections of risers above mean water level, and to explore improvement and
extensions to the existing technologies. The project will include the
technical evaluation and full-scale testing of existing repair systems under
realistic loads. Finite element analyses will be completed to illustrate and
assess the reinforcement provided by particular composite systems.
Furthermore, a hybrid glass-carbon fiber reinforcement system will be
evaluated to as a means of providing a robust underwater repair system. The
testing program and procedures are being developed for riser application
scenarios to develop a realistic set of test loads. |
| Progress |
In a joint research effort between OTRC and Stress
Engineering Services (SES), the full-scale test program to assess individual
repair systems of four (4) manufactured products. The four
manufacturers prepared their composite repair system at the SES test center
in Houston, Tx under the close observation of SES staff. In preparation,
8-inch diameter pipe was machined to simulate a corroded riser section
and then the composite repair systems are applied by the manufacturers to
the machined area to simulate an in-field repair. The repaired pipe was then
tested to failure under realistic loads including; 1) Internal pressure, 2)
Internal pressure and axial tension, and 3) Internal pressure, axial
tension, and bending. The study was completed in September 2007. See
presentations and final reports below. |
| Report |
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AA (845
KB; 20 pages) |
Presentation
entitled Assessing the Use of Composite Materials in Repairing and
Reinforcing Offshore Riser Pipes,
September 19, 2006, by Chris
Alexander of Stress
Engineering Services, Houston,
Texas. |
|
AB
(3009 KB; 104 pages) |
Final Guidelines entitled Composite Repair Methods for Steel Pipe,
June 2007 by Dr. Ozden O. Ochoa, Department of Mechanical Engineering, Texas
A&M University, College Station, Texas and Chris Alexander of Stress
Engineering Services, Houston, Texas. |
|
AC (701 KB;
23 pages) |
Supplemental Report entitled Composite Repair Methods for Steel Pipe
Research Activities Summary, June 2007 by Dr. Ozden O. Ochoa, Department
of Mechanical Engineering, Texas A&M University, College Station, Texas and
Chris Alexander of Stress Engineering Services, Houston, Texas. |
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