Allows the cementing of the string in two or three stages despite loss zones.
Challenge
Low-pressure formations, high permeability zones, and very long casing string can make cementing operation difficult with standard cement slurry leading to significant cement losses and no return to the surface and insufficient annular integrity.
Solution
A Steel Packer combined with a Stage Collar is run as part of the casing string. The packer is positioned above the troublesome formation on a competent hole section. Once expanded, the packer provides active support for the cement, circulated through the stage collar up to surface. The robustness of our Steel Packer reduces the risk of damage during RIH, even in slim holes. Rotation of the string while running-in is allowed to ease the operation and the cement placement. The high expansion ratio ensures effective sealing even in washed-out boreholes.
| _ | Xpandable steel ECP-C |
|---|---|
| Mounting | Crimped |
| Valve system | Lock valve closing permanently packer expansion port, and trapping fluid inside packer |
| Sealing System | Deformable corrosion-resistant alloy (CRA) sleeve with elastomer seal |
| Reliability | Life of well valve system |
| Performance | High DeltaP achieved with moderate setting pressures |
| Max DeltaP | Up to 5,000 psi, lower for bigger sizes |
| Max Temp. | 250 degF - 120 degC |
| Qualification | API 19 OH V2 |
