Wireline-deployed metal expandable packer for well integrity
The Welltec® Delta Xpander combined with a Welltec Annular Barrier (WDX-WAB) delivers a novel wireline-enabled method for well integrity management, with the ability to deploy and activate multiple metal expandable packers in scenarios where conventional pressure-based activation is not feasible.
The WDX-WAB uses a downhole pump and valve-controlled sequence to enable precise, individual expansion of each metal expandable packer. This method allows for multiple WABs to be run in hole and expanded in place or positioned for future activation.
By decoupling deployment from pressure-based activation, the WDX-WAB unlocks new flexibility in completion design and contingency planning. The result is a highly flexible, wireline-deployed solution for remediation and proactive well integrity management.
Challenges and applications
Benefits
The WDX-WAB is delivered on an integrated wireline toolstring, combining all components needed for deployment and expansion.
Once run in hole, each WAB can be positioned to isolate a zone immediately or left for later expansion, depending on operational needs. This is particularly valuable where conventional pressure-based activation is not feasible.
Expansion is performed hydraulically using well fluid, delivered by the downhole pump in a controlled sequence. Each packer typically takes around 60 minutes to set and is fully monitored in real time via Surface Read Out (SRO) data for setting pressure, downhole pressure, and temperature. A fail-safe shear pin release provides redundancy in the unlikely event of pump malfunction or communication loss.
The result is a wireline-deployed, pressure-independent solution enabling precise, selective expansion of multiple WABs, whether for immediate isolation, staged zonal remediation, or proactive placement for future intervention.
| Applications |
| When conventional pressure-based WAB activation is not feasible |
| Proactive WAB deployment for future activation |
| Uncertain or changing downhole conditions |
| Features |
| Valve-controlled setting sequence |
| Well fluid–driven expansion pressure |
| Selective WAB activation |
| Real-time temperature and pressure monitoring |
| NACE compliant |
| Slim run in hole outer diameter |
| No dedicated seal area required |
| Benefits |
| Cost-effective deployment without the need for coiled tubing or workover rigs |
| Enables setting of multiple packers on a single run |
| Durable packers withstand multiple pressure cycles |
| On-field reconfiguration available to match tally |
| Compatible with other Welltec solutions |
| Facilitates deployment in restricted and narrow wellbores |
| Seals directly within tubing, eliminating need for specialized sealing profile |
| Specifications* | |
| Tool OD | 3-3/8” |
| Minimum well ID | 3.5” |
| Maximum setting ID | 3.9” |
| Maximum activation pressure | 9,000 psi |
| Maximum WAB setting pressure | 7,000 psi |
| Maximum well temperature | 300°F |
| Maximum well pressure | 25,000 psi |
| Tension rating | 42,000 lbs |
| Length* | 40 ft |
| Weight (Min)* | 640 lbs |
| Expansion fluid | Well fluid (except mud) |
Talk to your local expert
At Welltec, our team of specialists is experienced in resolving the unique challenges of well drilling and operations across diverse terrain. Whatever your need, we can help you find a solution.