| 摘要 |
<p>A method of controlling occurrence of severe slugging in a riser (6) of a pipeline arrangement (2) comprising a riser base (8) and pipeline (4) conveying a multiphase fluid system in which the gas phase may be natural gas. A valve (14) regulates the velocity of gas along the pipeline towards the riser. A pressure sensor (34) observes the gas pressure in the riser base (8) and if the observed pressure exceeds a pre-determined control pressure value a three term pressure indication control (38) causes the valve (14) to be operated to open to an extent which increases the gas outflow through the pipe (12) and thus increases the velocity of gas in the pipeline to avoid occurrence of severe slugging in the riser.</p> |
