Seal Assemblies

The Seal Assemblies are designed to provide a dependable, leak proof seal between a Techwest Seal Bore Packer and the production string. The Seal Assemblies feature the field proven Chevron seal design in an opposed seal configuration using metal spacer rings.

The Latch Locator Sub is used where it is desirable to latch the Seal Assembly in the packer bore. For example, it is used in cases where upward tubing movement from temperatures or pressure etc. do NOT present a problem.

The Locator Sub is used where it is desirable to allow the seals to move up and down within the packer bore. For example, it is used in cases where upward tubing movement from temperature change and/or pressure change can cause the tubing to contract.

All type of Seal Assemblies are easily converted from one type to another with interchangeable components. Spacer seal units, spacer tubes etc. can be easily added to or deleted from a seal assembly for maximum versatilitiy.

Seal Assembly Materials

Seal assembly components are manufactured from alloy steel meeting N.A.C.E. specification MR-01-75 for H2S Service. When ordered in advance seal assemblies can be supplied in the following materials:

High strength Alloy Steel: For high pressure applications

Not suitable for H2S exposure as hardness exceed R.C. 22

9Cr 1Mo Alloy Steel: Used in containing high percentages of H2S and CO2

Material supplied complies with N.A.C.E. specification

MR-01-75 for H2S Service

Incoloy 925 High Alloy Steel: Used primarily for very severe corrosion environments

Seal Configurations and Materials

STANDARD SEAL STACK

Composed of Nitrile Chevron Seals and metal spacer rings. This seal pack is recommended for temperatures up to 175oF in non H2S environments.

DEBRIS BARRIER SEAL STACK

Similar to the standard seal stack except that Molyglass V Seals are used instead of Nitrile V Seals. This stack is often used as the top two or three stacks on a long KMR Seal Assembly to prevent debris from entering the packer bore. It may also be used as a primary seal stack in environments containing high percentages of oxygen.

PREMIUM A SEAL STACK

Composed of Viton Chevron Seals backed up by Molyglass Chevron Seals. Recommended for use in sour or hostile environments at temperatures up to 200OC (400o F).

PREMIUM B SEAL STACK

Similar to the Premium A Stack except that Alfas V Seals are substituted for the Viton V Seals. Good for temperatures up to 175OC (350OF).

KMR SEAL STACK

Composed of Kalrez V Seals backed up by Molyglass and Ryton V Seals for use in high temperature hositle environments. Good for temperatures up to 260OC (500OF).

Molyglass Trade name for reinforced Teflon

Alfas Trademark of Ashi Glass

Kalrez Trademark of Dupont

Ryton Trademark of Phillips Petroleum Co.

Teflon Trademark of Dupont

Address

Suite 7
4351 – 104 Avenue S. E.
Calgary, Alberta, T2C 5C6, Canada

Telephone / Fax

1.403.252.9230 (T)
1.403.252.9350 (F)

Email

info@protexcis.com