Dorsal Centralizers

The issue of excessive conductor movement is well known within the offshore industry. There are multiple approaches to solving this challenge such as restricting the annulus, chocking/shimming and the use of steel centralizers. These approaches have their own drawbacks:

  • Fretting of tubulars
  • Allowing impact damage to occur – cracking of welds on stubs guides
  • Allowing vibration to migrate to other parts of the structure or flowlines
  • Require periodic inspection, maintenance and repair/replacement
  • Poor fitment resulting in costly maintenance and additional repair activities

Mako have developed the Dorsal conductor centralizer in response to the unmet needs of offshore operators. Dorsal uses elastic polyurethane which creates a vibration damping stress absorbent centralizer. The centralizer is designed to last up to 25 years and extends the life of tubulars, guideframes, wellheads, XTrees and associated flowlines.

Dorsal centralizers provide:

Reduced Cost of Asset Ownership

  • Extend Tubular, Guideframe, Xmas Tree and Ancillaries lifespan
  • Eliminate centralizer inspection and maintenance
  • Life of field centralizer system

Improved Asset Integrity Assurance

  • Prevent further corrosion
  • Prevent further coating breakdown
  • Reduce dynamic loading
  • Reduce vibration migration to structure and ancillaries
  • Eliminate point loads through full guideframe utilisation for support

Efficient Installation

  • Rope Access Team installation – Topside
  • ROV or Diver installation – Subsea
  • No requirement for tubular and guide concentricity during install
  • Rapid installation

Patent Application Number: 1915215.6