ISOPAX Feed-Thru Packer
The ISOPAX Feed-Thru Packer is a compact, hydraulic-set, retrievable production packer that lets multiple control lines, chemical injection lines or gas vent valves bypass the packer. It is available for 4-1/2" to 13-3/8" casing, up to 10,000 psi working pressure, with standard sizes from 4-1/2" to 9-5/8" casing.
Key specifications
- Packer type
- Hydraulic-set, retrievable, feed-through
- Application
- Smart well completions, flow assurance, zonal isolation
- Working pressure
- Up to 10,000 psi
- Casing sizes
- 4-1/2" to 13-3/8" (standard table: 4-1/2" to 9-5/8")
- Feed-through options
- 1/4", 3/8" and 1/2" control and chemical injection lines; 3/4", 1" and 1-1/2" gas vent valves
- Release
- Straight pull, cut, control line or shift sleeve
- Materials
- Low alloy steel standard; other alloys on request
- Manufactured
- Jebel Ali Free Zone, Dubai, UAE
Sizes and dimensions
| Casing size (in) | Casing size (mm) | Casing weight (lb/ft) | Casing ID min (in) | Casing ID min (mm) | Casing ID max (in) | Casing ID max (mm) | Max gauge OD (in) | Max gauge OD (mm) | Min ID through packer, in (mm) |
|---|---|---|---|---|---|---|---|---|---|
| 4-1/2 | 114.30 | 11.6 - 12.6 | 3.894 | 98.91 | 4.068 | 103.33 | 3.864 | 98.15 | 1.968 (49.99) |
| 4-1/2 | 114.30 | 13.5 | 3.852 | 97.84 | 3.992 | 101.40 | 3.822 | 97.08 | 1.968 (49.99) |
| 5 | 127.00 | 13.0 - 15.0 | 4.337 | 110.16 | 4.567 | 116.00 | 4.307 | 109.40 | 2.500 (63.50) |
| 5 | 127.00 | 15.0 - 18.0 | 4.194 | 106.53 | 4.486 | 113.94 | 4.164 | 105.77 | 2.500 (63.50) |
| 5 | 127.00 | 18.0 - 20.8 | 4.063 | 103.20 | 4.360 | 110.74 | 4.033 | 102.44 | 2.500 (63.50) |
| 5-1/2 | 139.70 | 14.0 - 15.5 | 4.881 | 123.98 | 5.089 | 129.26 | 4.770 | 121.16 | 2.688 (68.28) |
| 5-1/2 | 139.70 | 17.0 - 23.0 | 4.577 | 116.26 | 4.975 | 126.37 | 4.490 | 114.05 | 2.688 (68.28) |
| 6-5/8 | 168.28 | 32.0 | 5.567 | 141.40 | 5.786 | 146.96 | 5.437 | 138.10 | 3.250 (82.55) |
| 6-5/8 | 168.28 | 24.0 - 28.0 | 5.693 | 144.60 | 6.020 | 152.91 | 5.625 | 142.88 | 3.250 (82.55) |
| 7 | 177.80 | 38.0 | 5.799 | 147.29 | 6.042 | 153.47 | 5.625 | 142.88 | 3.250 (82.55) |
| 6-5/8 | 168.28 | 20.0 - 24.0 | 5.834 | 148.18 | 6.142 | 156.01 | 5.750 | 146.05 | 3.250 (82.55) |
| 7 | 177.80 | 35.0 - 38.0 | 5.799 | 147.29 | 6.121 | 155.47 | 5.750 | 146.05 | 3.250 (82.55) |
| 6-5/8 | 168.28 | 20.0 | 5.972 | 151.69 | 6.142 | 156.01 | 5.812 | 147.62 | 3.250 (82.55) |
| 7 | 177.80 | 35.0 | 5.891 | 149.63 | 6.121 | 155.47 | 5.812 | 147.62 | 3.250 (82.55) |
| 6-5/8 | 168.28 | 17.0 | 6.057 | 153.85 | 6.215 | 157.86 | 5.940 | 150.88 | 3.250 (82.55) |
| 7 | 177.80 | 29.0 - 32.0 | 5.988 | 152.10 | 6.292 | 159.82 | 5.940 | 150.88 | 3.250 (82.55) |
| 7 | 177.80 | 26.0 - 29.0 | 6.089 | 154.66 | 6.379 | 162.03 | 6.000 | 152.40 | 3.250 (82.55) |
| 7 | 177.80 | 23.0 - 26.0 | 6.186 | 157.12 | 6.465 | 164.21 | 6.100 | 154.94 | 3.250 (82.55) |
| 7 | 177.80 | 17.0 - 23.0 | 6.283 | 159.59 | 6.629 | 168.38 | 6.180 | 156.97 | 3.250 (82.55) |
| 7-5/8 | 193.68 | 33.7 - 39.0 | 6.509 | 165.33 | 6.881 | 174.78 | 6.440 | 163.58 | 3.250 (82.55) |
| 7-5/8 | 193.68 | 24.0 - 29.7 | 6.780 | 172.21 | 7.129 | 181.08 | 6.690 | 169.93 | 3.250 (82.55) |
| 8-5/8 | 219.08 | 44.0 - 49.0 | 7.381 | 187.48 | 7.758 | 197.05 | 7.250 | 184.15 | 3.875 (98.43) |
| 8-5/8 | 219.08 | 36.0 - 40.0 | 7.613 | 193.37 | 7.948 | 201.88 | 7.437 | 188.90 | 3.875 (98.43) |
| 8-5/8 | 219.08 | 24.0 - 32.0 | 7.825 | 198.76 | 8.207 | 208.46 | 7.687 | 195.25 | 3.875 (98.43) |
| 9-5/8 | 244.48 | 47.0 - 53.5 | 8.403 | 213.44 | 8.821 | 224.05 | 8.320 | 211.33 | 4.750 (120.65) |
| 9-5/8 | 244.48 | 43.5 - 47.0 | 8.561 | 217.45 | 8.891 | 225.83 | 8.470 | 215.14 | 4.750 (120.65) |
| 9-5/8 | 244.48 | 36.0 - 40.0 | 8.727 | 221.67 | 9.049 | 229.84 | 8.620 | 218.95 | 4.750 (120.65) |
Additional ports and bypasses
- Additional bypass as required, typically for 1/4", 3/8" and 1/2" control lines and chemical injection lines, or for 3/4", 1" and 1-1/2" gas vent valves.
Features
- Allows multiple control lines to bypass the packer.
- Compact design.
- No movement between tubing and casing during setting.
- Available with multiple size combinations for casing and tubing.
- Hydraulically set against a plugging device in the tubing below the packer; no packer movement relative to control lines or power cable while setting or retrieving.
- Anti-preset function prevents accidental setting while running in hole; once released, the packer locks in the release position and cannot reset while pulling out.
- Single-piece mandrel with no leak paths.
- Optional release methods: straight pull, cut, control line or shift sleeve.
- Low alloy steel as standard; 13Cr, nickel alloys and other materials to suit the well environment.
Applications
- Smart well completions
- Flow assurance (chemical injection)
- Retrievable production annulus pressure barrier
- Zonal isolation tying production tubing to production casing
Need a size, rating or metallurgy not listed?
Bespoke design is a WellBoss specialty. Our engineers design packers and completion tools to your specification: casing and tubing, pressure and temperature, ports and feed-throughs, connections, metallurgy and API 11D1 / ISO 14310 validation grade. Designs are built and tested in our Dubai facility.
Questions buyers ask
Does WellBoss make a feed-through packer for 5-1/2 inch casing?
Yes. The ISOPAX Feed-Thru Packer covers 5-1/2" 14.0-15.5 lb/ft (max gauge OD 4.770") and 17.0-23.0 lb/ft (max gauge OD 4.490"), with a 2.688" (68.28 mm) minimum ID.
How many control lines can bypass the packer?
Multiple. Bypass ports are configured to suit 1/4", 3/8" and 1/2" control and chemical injection lines, or 3/4" to 1-1/2" gas vent valves.
Can the feed-through layout be customized?
Yes. Port count, sizes and metallurgy are configured per well, and bespoke feed-through designs are a WellBoss specialty.
Source: WellBoss 2026 Product Catalog, pages 11-12. Ratings are from WellBoss published data; confirm the final rating for your well conditions with WellBoss engineering when you request a quote.