CRT
Hydraulic collet running tool
Run liners and release without rotation—ideal in high-inclination wells.
Xcelis high-performance liner hanger systems
Hydraulic and mechanical set liner hangers and liner top packers
Engineered for the most challenging well environments and exceeding the requirements for their API Spec 19LH qualification
How Xcelis systems improve liner hanger setting operations in a previous casing string
During displacement and hole cleaning, the large bypass area and shorter length reduces equivalent circulating density (ECD). The slip and cone interface has the same effective bypass area in both the unset and set conditions, enabling improved hole cleaning and higher tolerance to debris accumulation.
When setting in the previous casing string, the slip design’s aggressive bite improves hanging capacity with deep host casing engagement to avoid slippage. The rail-free slips uniformly distribute the axial load so as not to jeopardize the host casing’s integrity.
How Xcelis systems enhance primary cement placement and long-term zonal isolation for cemented liner applications
The ECD during cementing operations is reduced due to the compact length and larger bypass area, which both act to reduce pressure drop across the liner hanger system, reducing the risk of poor primary cement placement. Additionally, the Xcelis liner hanger system can be configured with an optional bearing to rotate the liner for optimal cement distribution in the annular space, thereby facilitating long-term zonal isolation and improving well productivity.
After the liner hanger has been set and cemented, the liner packer is set by placing the rotating tamping dog assembly on the tieback receptacle and slacking off the drillstring. Excess cement above the liner top packer can be circulated out after the packer is set.
How Xcelis systems improve well integrity even in high-pressure, high-temperature wells
During run-in-hole, displacement, and cementing operations, liner top packer sealing elements must endure the frictional effects of high-rate fluid circulation and the washing effect of debris carried with the fluid, which can negatively impact its performance. The sealing element for the liner packer is a proprietary design and compound formulation, which has been rigorously flow tested with debris to ensure resilient high-performance setting and sealing, even in high-solid-content mud. The elements are self energizing, meaning that once the packer is set, the sealing performance is sustained despite high-pressure, high-temperature thermal and pressure cycling through the life of a well.
Available as mechanical and hydraulic set liner hanger systems
The liner hanger system is available for mechanical- or hydraulic-set systems that are compatible with our field-proven hydraulic and mechanical setting tools. It is run with the hydraulic collet running tool (CRT) or the mechanical right-hand release tool (RRT).
- For the mechanical-set liner hanger, the slips are set by manipulating the string to engage the slips against the cones. Because of the manipulation of the string to set the hanger, it is recommended to use mechanical hangers in nondeviated wells.
- For the hydraulic-set liner hanger, the slips are set by applying pressure to the string that will actuate the hydraulic piston and will drive the slips against the cone.
In long liners set in vertical sections, this allows the liner hanger system to withstand higher hydraulic fracturing pressures when used with uncemented liners. The liner hanger is available in 125,000-psi [862 MPa] yield material. Other materials are available upon request.
Applications
Extended-reach wells
Highly directional wells
Ream-down operations
Horizontal wells
What else should I know about Xcelis liner hanger systems?
Xcelis high-performance liner hanger systems have been holistically designed to reduce the constraints of your liner casing well construction operations. A digital twin enables combining analytical and numerical analysis for full understanding of system mechanics. Subsequently, rigorous and extensive testing is conducted in compliance with and exceeding requirements for the system's API Spec 19LH qualification. Parametric modeling in close collaboration with your team captures the design intent for your most challenging wells, including features and constraints; it facilitates multiple iterations to deliver an optimal design.
Xcelis systems are available with
- hold-down slips to prevent the liner from floating after cementing, during fracturing operations, and when using light liners
- unibody construction (packer integrated with the liner hanger) or as modular stand-alone packers and liner hangers for increased flexibility
- various pressure and temperature ratings and in multiple sizes.
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