Page 37: of Marine Technology Magazine (Apr/May 2017)

Subsea View of Inverted

Helical Grooves on Drill

Riser Buoyancy the riser system and the vessel or other are more susceptible to the complica- important issues without increasing various deployed equipment from the tions arising from higher current ve- required equipment and rig operation auxiliary rotary or cranes. Higher ves- locities and the necessities of increased times. Solution-speci? c engineering of sel transiting speeds, with a riser string buoyancy uplift due to the increased the inverted helical module will facili- deployed, are also potentially achievable weight of deployed steel riser joints. tate the ability of drilling vessels around in certain scenarios, as maximum allow- The inverted helical drill riser buoyancy the globe to continue to deliver the en- able velocities, limited by riser stresses module design combats both of these ergy needs of the future.

and the potential of riser clashing, are in- creased. Finally, decreased riser drag can improve riser disconnect performance as horizontal excursion of the riser due to current loading is reduced after discon- nect occurs.

Conclusion

By using advanced software analysis, companies can continue to revolution- ize deepwater drilling and production in increasingly demanding and previously inhospitable environments. Software analysis coupled with the advancement of riser drag reduction and VIV sup- pression technology, provides an inte- grated solution to progressing drilling riser buoyancy and opens the door for resource exploration in areas previously deemed inaccessible. Extended lengths

Ph: (714) 546-3478 | www.secoseals.com | [email protected] of risers in ultra-deepwater applications www.marinetechnologynews.com

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