Introducing Matrix LGS - VIV and drag reduction drilling riser buoyancy system
Wednesday, November 4, 2015

Matrix Composites & Engineering Ltd has launched a new riser buoyancy system that is set to make a significant impact on drilling productivity, potentially saving operators millions of dollars per rig every year.

One of the biggest problems in offshore drilling is vortex induced vibration (VIV) and drag on the drill string during high current events. Once the current gets too great, drilling stops and costs mount. The new Matrix LGS (Longitudinal Groove System) has been designed to keep rigs drilling. The secret lies in its revolutionary profile, which reduces the vortices that form around riser strings and, hence, reduces drag.

Intensive tank testing by Matrix's partners, AMOG, showed that based on eddy profiles for the Gulf of Mexico, Matrix LGS will deliver an annual increase of 20% more uptime during eddy current events, saving around $15 million in lost time per annum. Performance features of Matrix LGS include:

  • Significantly reduces VIV and drag when compared with conventionally floated risers
  • 20%-30% increase in raw operable current speeds (in regions of the world investigated), including crabbing advantages
  • VIV fatigue damage rates five to ten times lower
  • Comparable buoyancy and manufacturing costs to conventional modules
  • Easily stacked both vertically and horizontally
  • Can be used with existing riser handling and storage equipment
  • Applicable to both new builds and the aftermarket

Matrix LGS is patented protected and also has none of the disadvantages associated with traditional VIV and drag solutions like fairings, which are slow to install and remove, and easy to damage.

Matrix's engineers are ready to carry out detailed riser VIV analysis to estimate just how much an operation would benefit from using Matrix LGS. Please call your nearest Matrix office for more information.