Mechanical subsea tie-in made in 825 feet of water

Journal Article · Fri Jul 01 04:00:00 EDT 1983 · Pipe Line Ind.; (United States)

OSTI ID:6835393

Cameron Iron Works has designed and installed the deepest mechanical subsea tie-in to date. The deepest of three mechanical connections on a natural gas line was in 251 m of water in the Santa Barbara Channel off the California coast. The installation was tested at 155 bars (2,220 psi) after installation. The Pacific Offshore Pipeline Co. (Popco) underwater natural gas transmission line is an 11-km, 305mm (7 mi, 12-in.), ANSI 900 system that links Exxon's Hondo platform with Popco's El Capitan gas processing plant. The subsea pipe line was laid in water depths of up to 259 m (850 ft). Cameron's collet connection system, under design for several months for this installation, connects the Popco system in three separate locations--one in 107 m (350 ft) of water, one at 171 m depth and the other at 825 ft. The pipe line is laid in a subsea right of way which required Popco to lay around an existing single anchor leg mooring. The seabed dropped more than 183 m in 6.4 km, (600 ft in 4 mi). To meet this need, Cameron proposed its inline tie-in system, trimmed to meet the sour gas service into which they were to be installed.

• OSTI ID: 6835393
• Journal Information: Pipe Line Ind.; (United States), Journal Name: Pipe Line Ind.; (United States) Vol. 59:1; ISSN PLINA
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
032000* -- Natural Gas-- Transport
Handling
& Storage
ANCHORS
CALIFORNIA
DEPTH
DIMENSIONS
ENERGY SOURCES
ENERGY SYSTEMS
FABRICATION
FASTENING
FEDERAL REGION IX
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
INSTALLATION
JOINING
MORPHOLOGY
NATURAL GAS
NATURAL GAS DISTRIBUTION SYSTEMS
NORTH AMERICA
OFFSHORE OPERATIONS
PIPELINES
SEA BED
USA