HERO Tieback Liner
HERO Tieback Liner

Welltec® Expandable Anchor (WEA) for Tieback Liner

Anchoring in cased hole


The Welltec® Expandable Anchor (WEA) for Tieback Liner is qualified for life-of-well, delivers maximum running clearance, and eliminates the need for further intervention runs, cementing, or waiting on swell time. Surface-controlled hydraulic expansion ensures bidirectional anchoring and sealing.

The solution is qualified in accordance with the highest-level API 19LH-V1 standard.

The development of the WEA as a Tieback Liner minimizes subcomponents, ensuring reliability and efficiency while simplifying well construction. The WEA enables reciprocation, circulation, and/or rotation during deployment.

The Welltec Expandable Anchor (WEA) for Tieback Liner can be run standalone or in combination with a Metal Expandable Packer (MEP), the proven hydraulic expansion sleeve. The rapid application of surface-controlled pressure simultaneously expands the WEA and the MEP system, offering an efficient alternative to conventional tieback solutions. The expansion sleeve hydraulically expands the bidirectional anchors, which uniformly engage with the ID of the outer casing. Increased loading/anchoring capacity is achieved via the modular addition of WEA sleeves. The slim running OD maximizes clearance to have minimal impact on ECD during fluid circulation of cementing operations.

WEA Tieback 360 0000 (1)

Case highlight

An onshore well in Trinidad & Tobago had to be shut in due to a corroded 6-5/8” production casing at 355 ft, and as a consequence, Heritage Petroleum Company lost production from the asset...

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The WEA is a single-piece machined sleeve, fully welded to a base pipe. The main anchor section is a machined slip that is mounted over the expansion sleeve.

The functionality and characteristics of the expansion sleeve are similar to that of Welltec’s metal expandable packer range. As the sleeve expands, the anchor rings engage with and grip the liner/casing ID. As the load is applied, the grip is increased, and increased load anchoring can be provided via additional sleeve assemblies.

The WEA range is fully compatible with Welltec® Metal Expandable Packers and WIV® technologies.

* Custom specifications and control line feedthrough options available on request.

Hori Tieback Liner


  • When the cementing of a single long casing is not feasible due to ECDs


  • 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


  • 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


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 API 19LH – V1
Expansion pressure while setting 4,500 psi 5,000 psi
Anchoring capacity Up to 80% of the tensile strength of the base pipe
Differential pressure 10,000 psi
Temperature range °C 30°C 130°C
Compatible with Metal Expandable Packers
*Custom specification and control line feedthrough options available on request