Well Construction & Integrity

CAPEX Effective, Life of Well Solutions

Well Construction & Integrity

Sustained Annular Pressure (SAP) affects (>30%) wells globally and is present within multiple annuli. Since 2009, well integrity has cost operators over USD 75 billion. This has provided the impetus for the industry to focus on and rework international standards on well integrity management.
  • APPLICATIONS
    Gas tight barrier for SAP prevention

Well Construction and Integrity

At Welltec®, we design and test our WAB® (Welltec® Annular Barrier) range in accordance to IS0 14310, the industry standard which defines packer design validation grades. 

Our V0* WAB range for cased hole SAP barrier has been tested to IS01410 V0*, the highest validation level within this industry standard, and provides, a verifiable, life of well barrier against SAP (Sustained Annular Pressure).

The steel packer expandable sleeve is expanded between the casing and the parent casing by applying pressure in the casing. Primary sealing with the casing is achieved through a patented series of V0* elastomer seals, optimized along the length of the steel sleeve, backed up by a series of metal fins that provide metal to metal contact within the casing.

Our V3* WAB range for open hole isolation, has been tested to IS01410 V3*, the highest fluid validation level within this industry standard, and provides, life of well, V3* isolation assurance, standalone within the open hole section, set within cement or used in combination with 2nd stage cement systems to support HP columns of cement, to prevent SAP or production of unwanted gas or water.

* Leak rate criteria

Case Highlight

CHALLENGE
Well construction & integrity

An IOC, had an appraisal well application, in the Norwegian Barents Sea, that required a number of solutions, to allow them to construct and complete the well to their high standards.

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The steel packer expandable sleeve

The steel packer expandable sleeve is expanded between the casing and the borehole by applying pressure in the casing. It conforms to the actual wellbore shape. Primary sealing with the borehole is achieved through a patented series of V3 rated elastomer seals, optimized along the length of the steel sleeve, backed up by a series of metal fins that provide metal to rock contact, and high strength anchoring capability.

The WAB can be mounted and welded onto any base casing in a simple and cost-effective way. Both ends are therefore fixed and provide life of well protection to the expanded WAB sleeve.

WAB® FOR WELL CONSTRUCTION & INTEGRITY

APPLICATIONS

FEATURES
  • IS0 14310 V0* cased hole SAP barrier
  • IS0 14310 V3* open hole SAP cement assurance
  • IS0 14310 V3* standalone open hole SAP isolation     
  • Platform for 2nd stage cement
  • Cross flow isolation
  • Open hole fault isolation plug
  • Casing hanger
  • Future-proof cap rock P&A
  • WAB can be incorporated within open hole, cased hole and hostile environment
  • *IS014130 leak rate criteria - V0, V3
  • Verified isolation at installation when coupled with WDMTM (Welltec® Data Monitor)
  • Rugged, all welded, metallic construction
  • High expansion capability
  • Slim RIH OD
  • Full bore - as per casing / tubing
  • Rapid, surface controlled setting
  • Integrity protection as standard
BENEFITS  
  • Life of well isolation
  • Constant, high pressure ∆p over full expansion range
  • High rate circulation capability during deployment
  • Removes channels or leak paths at set depth
  • Rapid set WAB expedites time to next hole section
  • Sour service / NACE compliant
  • No premature expansion
  • No slumping of primary or secondary cement during curing
  • Provides confirmed foundation for placement of P&A cement plugs
  • Designed for rotation during deployment enhancing primary cementing

Products applied