Well repair via high-temperature WAB® to revive geothermal producer
Well typeGeothermal producer
RnewablesWelltec pilot success in renewables market segment
Engineered workoverCost savings of USD 8 mm vs drilling of new well
High temperature applicationTo sustain up to 550°F at full production
The 1214WAB would also offer anchoring support to the casing string in the event of thermal contraction or expansion during production or shut-down operations.
During deployment, water flooded the well to keep temperatures ≤ 212°F – full production temperatures would be 600°F. The 1214WAB supported the cement column during curing and prevented free-water/acid from contaminating the cement or reaching the surface.
To drill a new well would have cost the client between USD 9 million and USD 12 million.
Welltec’s solution enabled the client to execute life-of-well, CAPEX-effective well-rejuvenation measures, proving the value of engineered well remediation techniques.
WAB assembly was adapted to incorporate a high-temp sealing system, non-elastomeric isolation valves and incorporated burst discs to bleed off high-pressure steam within an application that will reach 600°F at full production.
Incorporating the high temperature WAB simplified the installation process when compared to alternative products with far more complex setting procedures.
Our ISO 14310 rated, steel expandable WAB® (Welltec Annular Barrier) is expanded between the base pipe and the casing or the borehole by applying pressure in the casing. It conforms to the actual well bore geometry.