External Casing Packer

Xpandable Steel ECP

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xpandable steel ECP

Xpandable Steel ECP is based on proprietary expandable stainless steel technology. It is designed to set at low pressure and achieve zonal Isolation, for any stage cementing operation, or to prevent annular fluid migration in the annulus.

The stainless steel packer sleeve is expanded between the casing and the borehole, applying pressure in the casing. It conforms to the real wellbore shape. Sealing with the uneven borehole surface is achieved through a patented thin layer of bonded elastomer. 

Sealing lengths are available in 4 and 8ft. The packer is built onto a one-piece mandrel and fixed by crimping or welding. This patented design keeps casing integrity and provides high sealing and anchoring of the packer ends with the base pipe. There is no welding, no machining operation on the base casing, and there is no hidden internal connection. Both ends are fixed and serve as protection to the expandable sleeve while running in the well.

The packer features an expansion valve that closes the expansion port permanently once the packer is installed. The valve is activated by reaching a pre-determined pressure level. The activation pressure value can be modified by replacing a shear pin that is easily accessible. The expansion valve also provides safety if the packer is expanded in front of a wash-out. The valve system is fully-protected during RIH. 

Challenges

  • Robustness during RIH, can be worked in doglegs or tight spots
  • Preserve casing integrity after packer setting
  • Seal effectively in oval, out of gauge or irregular borehole
  • Expansion on demand (no waiting time)
  • Simple setting process. Quick installation time

The stainless steel packer sleeve expands between the casing and the borehole, applying pressure in the casing string. The sealing achieves with a thin layer of elastomer.

Dynamic seals mounted between steel rings can be added to improve sealing capacity.

The patented pressure balanced double sleeve design allows for the application of varying annular differential pressures while cycling the temperature without losing the seal.

The welded end fittings also serve as protection to the expandable sleeve while running in the well. Rotation is possible while running in, full casing characteristics are maintained. The expanded sleeve also acts as a centralizer to the casing string once expanded.