Oceaneering International, Inc.
Subsea Flowline Blockage Remediation Using Internal Heating Device

Abstract:

Coiled tubing may be placed inside a subsea flowline, such as with a subsea insertion tool, to remediate blockages in the flowline subsea. In embodiments, the subsea insertion tool is used to unspool a length of coiled tubing string from a coiled tubing reel and insert the unspooled coiled tubing string subsea into flowline to where a jetting nozzle is positioned proximate a blockage in flowline 120. Fluid is provided, e.g. pumped, from chemical pumping unit 80 to coiled tubing string 100 through to jetting nozzle 110 to remediate the blockage in flowline 120.