A Choice of Packer Types

TAM offers three distinct inflatable element designs to accommodate the wide range of applications in hole

sizes, applied differential pressure, bottom hole temperature and project economics.

An inflatable packer can achieve higher expansion than conventional packers and is designed with a long

seal length for open hole applications. The inflatable packer does not contain "slips" and therefore can be

used to seal in PVC and stainless casing without marring the inside diameter.

SD Inflatable Packers
The SD product line is the most economical tool available and is used in well conditions where the applied

differential pressure is less than 500 psi (34 bar).

LI Inflatable Packers
The LI product line is rated for use in applications where applied differential pressure is less than 1,000 psi

(69 bar).

HD Inflatable Packers
The HD product line is rated for well applications requiring high differential pressure capacity. Standard models

are rated at 5,000 psi (345 bar) maximum applied differential pressure.

Selection Criteria

Packer Size:
In general, the largest packer that can be run in the hole should be used. The lower the expansion ratio (Inflated

O.D./Run-in O.D.), the higher the differential pressure rating as shown in the specific charts for each product line.

The charts provided do not take into account the effects of elevated temperature nor is the differential pressure rating

based onthe packer’s ability to resist movement, but rather its ability to seal at the rated pressure. TAM recommends

that eachapplication be reviewed by an experienced TAM specialist to assure the proper selection of the packer size

and product type.

Inflation Medium:
TAM inflatable packers are designed to be inflated with either gas or liquid. The optimum inflation medium to use

depends onthe nature of the operations and resources available.  Gas inflation is often used in deep, dry or low fluid

level holes. Even without hydrostatic pressure on the exterior of the packer element, once the gas pressure is

released the inflation element will deflate. Gas is also used as the inflation medium in applications where large

temperature fluctuations are expected. Another advantage is gas inflation simplifies most operations.

Application Information Required:
In order for TAM to assist in the proper selection of an inflatable packer type and size, the following information is required.

1. Hole diameter at the proposed setting depth
2. Minimum restriction above setting depth
3. Expected differential pressure and temperature
4. Work string connection