ECP (External Casing Packer)

Continuous Mandrel ECP assemblies are designed with packer elements in 4 Foot (1.22m), 10 Foot (3.05m), and 20 Foot (6.10m) lengths. WORLD OIL TOOLS Tools packer elements soundly conform to irregular or washed-out hole diameters.

Steel reinforcement slats are used within the elements to ensure that the ECP self-centers itself in vertical, deviated, or horizontal wellbores. Tools are available in Standard and Special clearance models. Standard clearance tools are used where higher differential pressures are encountered across the packer element. Special clearance tools are used for applications where restricted hole diameters may occur.


Continuous Mandrel ECP assemblies are typically inflated with cement displacement fluid. An integral screen prevents coarse particles from entering the valve system. The valves are designed with high quality materials, which will not erode when abrasive materials are pumped through the system.


The WORLD OIL TOOLS valve system provides positive closing, after the element has been fully inflated to pre-determined pressure. After the shear valve has shifted to the final closed position, a mechanical locking device ensures that no further movement will occur.

WORLD OIL TOOLS inflatable elements are available with Standard and Advanced elastomer compounds. Standard elastomer compounds may be used for temperatures up to 240° F (115° C). Advanced elastomer compounds are made available for applications in which temperatures reach up to 350° F (180° C).

Features & Benefits
  • The continuous one-piece mandrel eliminates the need for internal threaded connections. Mandrel specifications are identical to the casing used in the well.
  • The Valve system is located above the packer element. Valve operation is not affected by unpredictable pressure changes below the element.
  • Superior anchoring system prevents element rotation, and packer shoe travel, while tools are run into the well.
  • WORLD OIL TOOLS ECP’s are manufactured with high strength steel materials suitable for H2S and CO2 environments.
  • Shear pins in the valves may be easily replaced in the field, allowing the operator greater flexibility when well conditions change.

To Prevent Loss of Cement

External Casing Packers may be positioned in the casing string directly above a lost circulation zone. The packer effectively prevents the loss of high-density cement slurries into the lost circulation zone. For these applications, a second stage cementing operation is normally performed above the ECP, after setting the packer.

To Prevent Gas Migration through Cement Columns

In many wells, gas migration through cement slurry can be prevented by setting an External Casing Packer directly above a high pressure gas zone. Improved cement integrity will be achieved.

To Prevent Unwanted Water Production

An External Casing Packer may be positioned slightly above an oil-water or a gas-water contact, in order to minimize water production from those zones.

To Minimize Damage To Sensitive Formations and Barefoot Completions

In the past, barefoot completions were used to minimize formation damage to production zones. However, today’s technology, using under-balanced drilling methods, allows drilling of the well to the required total depth, and to set External Casing Packers directly above sensitive formations.

For Centering Casing In Horizontal Wells

Several External Casing Packers may be used on horizontal casing strings in order to centralize casing and to ensure even distribution of cement around the casing.

Slotted Liners

External Casing Packers may be positioned at one or more points on slotted liners. These packers may then be set at a later date, using cup-type tools.

For more info please click to view The technical catalogue for the ECP Packer (2.59 MB PDF) to download the catalogue

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