Page 104 - Handbook Of Multiphase Flow Assurance
P. 104
100 5. Flow restrictions and blockages in operations
Progress in subsea remediation time
160
140
Hydrate remediation
Other flowline remediation
120 Linear (hydrate remediation)
Linear (other flowline remediation)
100
Time (days) 80
60
40
20
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Year of work start
FIG. 5.3 Progress in subsea remediation time.
TABLE 5.2 Frequency of hydrate blockage remediations by one service provider
Year 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
Number 6 3 14 7 7 12 14 10 5 11
remediation performed by one technology provider below may be indicative of the overall
frequency of flow assurance blockages.
While the average number of hydrate blockage remediation projects per year is 9 globally
for one service provider as shown in Fig. 5.4, this is a lower estimate. Some blockages remain
Hydrate remediations per year
16
14
12
10
8
6
4
2
0
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
FIG. 5.4 Trend of subsea hydrate remediations by one service provider.
