Apparatus and method for arresting the propagation of a buckle in a pipeline
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United States of America Patent
Stats
-
Mar 11, 1997
Grant Date -
N/A
app pub date -
Jun 16, 1995
filing date -
Jun 16, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An underwater pipeline is disclosed that arrests the propagation of a collapse or buckle that may occur as the pipeline is being laid or after the pipeline is in service. The pipeline comprises a plurality of joints of pipe connected end-to-end by a threaded connection. Each connection includes external cylindrical threads of opposite hand on adjacent ends of the pipe joints. A coupling having right and left-hand threads for moving the ends of the pipe joints into abutting position in sealing engagement with a seal ring to seal the connection. The connection provides a physical discontinuity in the pipeline to stop the propagation of a buckle in the pipeline. Additionally, by virtue of the thread profile, the coupling may provide radial support to the pin members to resist collapse.
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