RLWI Solutions

RLWI solutions

RLWI SOLUTIONS

Subsea well optimization made cost effective through our downhole,
e-line solutions for RLWI interventions

  • Deployment Solutions
  • Mechanical Solutions
  • Clean-out Solutions
  • Milling Solutions

RLWI SOLUTIONS

Easy oil is in decline and operators are looking further and further offshore for production. However, subsea wells consistently under perform when it comes to total recovery.

Research has demonstrated there exists a gap of ~ 30-40% in recovery from subsea fields compared to land based fields. It has also shown that recovery can be increased with more frequent interventions to positively impact production. As more and more subsea wells are constructed, methods to increase total production must be adapted. Welltec is a key enabler of the technology required to boost subsea recovery.

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Well Cutter for MECHANICAL SOLUTIONS
Welltec Pressure Tempurature for DIAGNOSTICS

DEPLOYMENT OPTIONS

Traditionally, semi-submersibles have been used to perform interventions on subsea wells. However these vessels can be expensive and require long lead times. RLWI changes the game.

A true breakthrough came with the courage to run e-line through open water to intervene in a subsea well for the first time. From that moment onward a new business was begun. Capitalizing on existing, more readily available equipment to accomplish interventions, RLWI can be accomplished with purpose built vessels or a vessel of opportunity. No rig required.

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There are three standard classes of vessels from which to perform subsea intervention work:

1. Riserless Light Well Intervention (RLWI) vessel (CAT-A)
2. Heavy intervention vessel with lightweight high pressure riser system (CAT-B)
3. Semi-submersible rig with low pressure marine riser (CAT-C)

Welltec can provide services and solutions from all three but where we deliver distinct value is in combination with the first class, RLWI.


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FEATURES

  • Inherently safer
  • Less equipment, fewer people
  • No need for a rig
  • E-line operations
  • Flexible
  • Universal
  • Reliable

BENEFITS

  • Fewer lifts, clear roles and responsibilities
  • Reduced footprint, higher sustainability
  • Required vessels are available
  • Fast, efficient
  • Can work in any water depth
  • Global experience and suppliers
  • Proven track record of successes

Track records

Welltec® Annular Barrier replaces cement as a primary well barrier

TYPICAL APPLICATIONS FOR SUBSEA WELLS

  • Scale and metal milling
  • Shifting sliding sleeves and valves
  • Sand/debris clean out
  • Production enhancement services
  • Crown plug pulling
  • Downhole snubbing capability
  • Swaging of deformed tubing/pipe
  • Nipple profile milling
  • Fishing with DH snubbing unit
  • Installing and pulling plugs, straddles and patches
  • Data gathering (PLT, CBL, PNL)
  • Perforating / re-perforation
  • Zone isolation (plug/straddle)
  • Inspection/repair/installation of insert DHSV
  • Milling of short scale bridges
  • Camera runs
  • Scale treatment placement
  • Selective tracer injection or sampling
  • Change-out of gas lift valves
  • Cutting tubulars

Tools applied

  • WELL STROKER® 318
  • WELL TRACTOR® 318 XR
  • WELLTEC RELEASE DEVICE®