XCELIS High-Performance Liner Hanger Systems

How XCELIS liner hanger system improves production liner and intermediate liner casing run-in-hole operations

When running the liner string, whether it is a production liner or an intermediate liner casing string, the compact length and large bypass area reduces the surge-pressure risk of lost circulation, allowing for faster descent speeds and reducing rig time. The patented interlocking pocket slip, cone, and retention ring design prevent presetting due to friction and avoids loosening or loss of slips while running in the hole.

The high operational torque capacity enables rotation to overcome ledges and hole collapse or reduce friction of longer liners to reach target depth. The liner hanger system can be floated or, to limit buoyancy, can be used with modified floatation equipment to use the mud-over-air method.

How XCELIS improves 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 enhances 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, 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 improves well integrity even in high temperature high pressure 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.