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Advanced Well Architecture

Enhancing Wellbore Integrity for Intelligent Well Deployment

Welltec® AWA

Welltec's new AWA system (Advanced Well Architecture) is facilitating a paradigm shift in the way multi-zone Intelligent Completions are being deployed globally.
The Welltec® AWA enables deployment of multi-zone intelligent completions, in a stable environment, with the multi zone reservoir fully isolated from wellbore.
  • APPLICATIONS
    Controlled reservoir isolation / access for deployment of Intelligent Well Completions;
    ESP producers; depleted reservoir / losses; deep water

INTRODUCTION

Welltec® AWA comprises of our industry proven WAB® for Zonal Isolation & WFV™ DP for inflow control, ran in combination, across the open hole reservoir section, facilitating full bore, cementless, zonal isolation & control.

The addition of Welltec's new DHA (Downhole Actuator) run on the upper IC tailpipe, engages with and mechanically shifts open the WFV™ DP just prior to landing off the upper completion, providing flow access to the previously isolated zones. 

Thus the Welltec AWA enables safe deployment of intelligent completions in wells with losses.

Inflow from the reservoir via the WFV™ DP can then controlled by hydraulically activated inflow control devices incorporated within the upper completion.
During any potential workover, the DHA will re-engage and shift closed, multiple WFV's, re-isolating the reservoir to the wellbore during well re completion and enable safe retrieval/replacement of inner completion without reservoir damage (no LCM pumping, etc).

ADVANCED WELL ARCHITECTURE 2019 00000

Welltec® Annular Barrier

  • Rugged, all welded, metallic construction
  • Optional isolation of expansion port
  • Expansion assurance in multi-WAB® applications
  • High expansion capability
  • Constant, high pressure ∆p over full expansion range
  • No premature expansion
  • NACE compliant
  • Control line feedthrough optional – to communicate with hydraulically activated devices
  • Rotatable during deployment enabling liner to TD in challenging environments
  • Deployable through milled window for sidetrack & multi laterals
  • Slim OD allows for high rate circulation during deployment
  • Rapid set nature of WAB reduces time to 1st production
  • Full bore – as per casing / tubing

WFV™- DP (Welltec® Flow Valve with Dual Position)

  • Flow areas – up to 110% of casing bore x-sectional area
  • ON - OFF slot design
  • Low profile with minimum impact on ECD
  • Full bore design provides smooth flow area to minimize Delta P loss
  • Coatings to minimize scale deposition
  • Robust seal design for manipulation under Delta P
  • High burst collapse and torque capability
  • All variants can be combined with sand screens
  • Full bore ID maximizes DHA inner string production ID
  • No limitation on the quantity of WFVs
  • Materials to match completion and environment
  • Enabler for cementless completions in combination with the WAB
  • Enables rotation during completion
  • WFV CDP can also be used within AWA system
  • Simple, reliable manipulation via DHA

Welltec® DHA (Downhole Actuator)

  • Debris tolerant design
  • Bi-directional
  • Application load flexibility
  • Emergency release
  • Full bore ID
  • Robust life of well design
  • Multiple WFV open/close capability
  • No reduction in production ID

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