Development of a COLD TAPPING pipeline repair system
Conference
·
OSTI ID:5351647
The COLD TAPPING technique provides a system that avoids flooding of a subsea pipeline during modifications, such as adding a connecting tee, or repair of the line. Pipeline pressure is equalised with the hydrostatic pressure of the seawater. A tap is performed on each side of the line to be modified. Plugs are inserted and inflated. Conventional hyperbaric welding is employed to effect the modifications or insertion of a new pipeline section. The plugs are removed by pigging and a clean line is restored without protrusions or weak points. Deep water trial have shown that the COLD TAPPING operation can be accomplished in under two days.
- OSTI ID:
- 5351647
- Report Number(s):
- CONF-850941-
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
022000* -- Petroleum-- Transport
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& Storage
03 NATURAL GAS
032000 -- Natural Gas-- Transport
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& Storage
42 ENGINEERING
420205 -- Engineering-- Transport & Storage Facilities-- (1980-)
423000 -- Engineering-- Marine Engineering-- (1980-)
CLOSURES
CONTROL
ENERGY SOURCES
EQUIPMENT
FABRICATION
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROGEN COMPOUNDS
HYDROSTATICS
JOINING
JOINTS
MATERIALS HANDLING EQUIPMENT
MODIFICATIONS
NATURAL GAS
OFFSHORE SITES
OXYGEN COMPOUNDS
PETROLEUM
PIPE JOINTS
PIPELINES
PRESSURE CONTROL
REMOTE HANDLING
REMOTE HANDLING EQUIPMENT
REPAIR
SEAWATER
TRANSPORT
UNDERWATER OPERATIONS
WATER
WELDING
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-)
CLOSURES
CONTROL
ENERGY SOURCES
EQUIPMENT
FABRICATION
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROGEN COMPOUNDS
HYDROSTATICS
JOINING
JOINTS
MATERIALS HANDLING EQUIPMENT
MODIFICATIONS
NATURAL GAS
OFFSHORE SITES
OXYGEN COMPOUNDS
PETROLEUM
PIPE JOINTS
PIPELINES
PRESSURE CONTROL
REMOTE HANDLING
REMOTE HANDLING EQUIPMENT
REPAIR
SEAWATER
TRANSPORT
UNDERWATER OPERATIONS
WATER
WELDING