The STAC Retrievable Hydrostatic Packer is a versatile and reliable solution designed for production, injection, and zonal isolation applications. It can be deployed in single or multiple-zone installations and is particularly recommended for deviated wells, where mechanical or wireline-set packers may not be suitable. This packer is hydraulically activated and hydrostatically set, requiring no tubing movement during setting. Once engaged, it is securely locked in place using one-piece no-directional slips, ensuring high differential pressure holding capability. The packer can be easily retrieved with a straight pull. It is available for 4 1/2” through 9 5/8” casing sizes.
✔ Secure setting – Performs reliably in all casing hardness, including premium grades.
✔ Simple operation – Designed for ease of installation and retrieval.
✔ Hydraulically activated, hydrostatic set – No tubing movement required for setting.
✔ Built-in unloader and bypass – Facilitates pressure equalization and efficient retrieval.
✔ Mechanically locked packoff – Constantly reinforced by hydrostatic pressure for superior sealing.
✔ Triple-seal multi-durometer elements – Provides enhanced sealing performance under various well conditions.
✔ No mandrel movement during setting – Ideal for stacked packer applications.
✔ Straight pull release – Enables quick and efficient retrieval.
✔ Field-proven design – Tested and validated for reliability in demanding well environments.
🔹 Production & Injection Wells – Provides effective zonal isolation for optimizing well performance.
🔹 Deviated & Horizontal Wells – Suitable where mechanical or wireline-set packers are impractical.
🔹 High-Pressure & High-Temperature Wells (HPHT) – Ensures secure sealing in extreme conditions.
🔹 Well Stimulation & Intervention – Used for fracturing, acidizing, and pressure isolation.
🔹 Stacked Packer Installations – Allows for multiple packers in the same wellbore without mandrel movement.
Packer Specifications
Packer Specifications
| Casing OD |
Casing WT |
Setting Range Min ID |
Setting Range Max ID |
Tool ID |
Tool OD |
Threads |
| 4 1/2 | 9.5-13.5 | 3.91 | 4.09 | 1.93 | 3.771 | 2-3/8EU 8RD |
| 5 | 15.0-18.0 | 4.25 | 4.408 | 1.93 | 4.125 | 2-3/8EU 8RD |
| 5 1/2 | 20.0-23.0 | 4.625 | 4.778 | 1.995 | 4.5 | 2-7/8EU 8RD |
| 5 1/2 | 15.5-20.0 | 4.778 | 4.95 | 1.995 | 4.641 | 2-7/8EU 8RD |
| 6 | 20.0-23.0 | 5.195 | 5.391 | 1.995 | 5.062 | 2-7/8EU 8RD |
| 6 | 15.0-18.0 | 5.391 | 5.56 | 1.995 | 5.156 | 2-7/8EU 8RD |
| 6 5/8 | 34 | 5.609 | 5.84 | 1.995 | 5.406 | 2-7/8EU 8RD |
| 6 5/8 | 28.0-32.0 | 5.61 | 5.791 | 1.995 | 5.484 | 2-7/8EU 8RD |
| 7 | 26.0-29.0 | 6.279 | 6.456 | 2.416 | 5.968 | 2-7/8EU 8RD |
| 7 | 20.0-26.0 | 6.279 | 6.456 | 2.416 | 6.078 | 2-7/8EU 8RD |
| 7 | 17.0-20.0 | 6.456 | 6.578 | 2.416 | 6.266 | 2-7/8EU 8RD |
| 7 5/8 | 37.3-39.0 | 6.579 | 6.797 | 2.416 | 6.453 | 2-7/8EU 8RD |
| 7 5/8 | 24.0-29.7 | 6.797 | 7.025 | 2.416 | 6.672 | 2-7/8EU 8RD |
| 7 5/8 | 20.0-24.0 | 7.025 | 7.125 | 2.416 | 6.812 | 2-7/8EU 8RD |
| 8 5/8 | 44.0-49.0 | 7.312 | 7.531 | 3 | 7.312 | 3-1/2EU 8RD |
| 8 5/8 | 32.0-40.0 | 7.688 | 7.921 | 3 | 7.531 | 3-1/2EU 8RD |
| 8 5/8 | 32.0-40.0 | 7.922 | 8.128 | 3 | 7.781 | 3-1/2EU 8RD |
| 9 5/8 | 47.0-53.5 | 8.538 | 8.681 | 3 | 8.128 | 3-1/2EU 8RD |
| 9 5/8 | 40.0-47.0 | 8.681 | 8.835 | 3 | 8.437 | 3-1/2EU 8RD |
| 9 5/8 | 29.3-36.0 | 8.921 | 9.063 | 3 | 8.593 | 3-1/2EU 8RD |
