Diverless pipeline-repair system passes tests for 20-in. pipe
- Elf Aquitaine, Pau (FR)
- British Gas PLC, Newcastle upon Tyne (UK)
Full-scale tests of a diverless pipeline repair system have shown its effectiveness for repairing subsea pipelines of up to 20 in. in diameter. The repair principle is based upon a metal-to-metal seal. The pipe end is cold forged to form a flare. The metal-to-metal seal is located on a cone which is part of the mechanical hydraulically actuated connector. The cone is advanced and the metal-to-metal seal is compressed between the cone and the inside diameter of the flare, forming a high integrity pipeline seal. A set of remotely controlled modules was constructed to perform the repair operations, including pipe flaring. A series of onshore and shallow water trials have demonstrated the practicability of these modules and the feasibility of the new tie-in concept for a diverless pipeline repair. A second set of tools has also been designed for pipeline tie-ins which works with the pipeline-repair spread.
- OSTI ID:
- 6744322
- Journal Information:
- Oil and Gas Journal; (USA), Journal Name: Oil and Gas Journal; (USA) Vol. 88:21; ISSN OIGJA; ISSN 0030-1388
- Country of Publication:
- United States
- Language:
- English
Similar Records
Diverless tie-in tool gets first test on deepwater line
Diverless hard-pipe connection systems for subsea pipelines and flowlines
Related Subjects
022000* -- Petroleum-- Transport
Handling
& Storage
03 NATURAL GAS
032000 -- Natural Gas-- Transport
Handling
& Storage
42 ENGINEERING
420205 -- Engineering-- Transport & Storage Facilities-- (1980-)
423000 -- Engineering-- Marine Engineering-- (1980-)
CONTROL
DESIGN
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
EUROPE
NATURAL GAS WELLS
OFFSHORE OPERATIONS
OIL WELLS
PIPELINES
PIPES
REMOTE CONTROL
REPAIR
RESEARCH PROGRAMS
TOOLS
UNITED KINGDOM
WELLS
WESTERN EUROPE