Precision anchoring and versatile deployment with tieback systems
The Welltec® Expandable Anchor (WEA) for Tieback Liner, qualified for life-of-well, delivers maximum running clearance and minimizes the need for intervention runs, fluid impact during cementing, or delays due to swell time. It also reduces well construction complexity by decreasing subcomponents and ensuring high reliability and efficiency.
Reinstating production of a shut-in well by relining and isolating corroded casing
Discover how Welltec's completion solution using WEA reinstated a shut-in well for Heritage Petroleum Company in Trinidad & Tobago by isolating a corroded casing section.
WEA is a single-piece, machined sleeve, securely welded to a base pipe, ensuring a high level of durability and stability. The WEA's main component is a machined slip that fits over an expansion sleeve, integral to the anchoring system.
The expansion sleeve expands within the casing or liner and the anchor rings grip the inner diameter (ID) of the liner or casing. This grip strengthens as more load is applied. Additional sleeve assemblies can be added to further boost the anchoring capacity.
WEA is fully compatible with metal expandable packers, such as and Welltec® Annular Barrier (WAB®), and Welltec® Isolation Valve (WIV).
| Applications |
| When the cementing of a single long casing is not feasible due to ECDs |
| Features |
| High expansion and bidirectional load capability |
| Rugged, all-welded, metallic construction |
| Design solutions to accommodate various fluid types and hydraulic requirements |
| Load capability in dependent of Delta P |
| Compatible with feedthrough lines |
| NACE compliant |
| Benefits |
| Full bore solution maintains the tie-back ID with minimal running OD |
| Modular and compact design with high modular bidirectional load-carrying capability |
| Hydraulic expansion delivers compliance to damaged or deformed casings |
| Minimizes stress within deformed casing via even distribution of load |
| Enables reciprocation, circulation, and/or rotation during deployment |
| Reduced inventory – higher expansion capability covers multiple casing weights |
| Complies with API 19LH-V1 standard |
| Specifications | |
| Set within a tubular range | 6 5/8” -> 13 5/8” |
| Base-pipe range up to | 4 ½” -> 9 5/8” |
| Expansion range | 5.75" -> 12.38” |
| Maximum running OD | 5.6" -> 11.38” |
| ID | Full bore (as per base-pipe) |
| Qualification | 15-10-2026 |
| Expansion pressure while setting | API 19LH – V1 |
| Anchoring capacity | Up to 80% of the tensile strength of the base pipe |
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.