Cased Hole
CX7 — Helix Centraliser
Patented Helix mechanism for 5” to 8-5/8” casing — production and through-tubing centralization in a single run.
Description
The CX7 HELIX centraliser is the latest addition to the FOCUS™ range of precision centralisers. With Petromac’s patented “Helix” mechanism and ultra-low-drag custom bearings, the CX7 delivers unparalleled performance in an in-line configuration for small casing or through tubing operations.
The Helix centraliser boasts robust strength and ensures precise centralization of heavy tool-strings in challenging conditions. Unlike conventional centralizers, the CX7 reduces stick-slip and facilitates smooth gravity descent in high deviation wells.
Designed for casing sizes ranging from 5” up to 8-5/8”, the Helix centraliser enables data acquisition in a single run, saving valuable rig time.
Applications
- Precise centralisation of wireline logging tools in casings from 5” to 8-5/8”
- Production or Througtubing applications
- Gravity descent in highly deviated wells
- Stick-slip elimination
Specifications
| Model | CX7 | |
|---|---|---|
| Weight | 27 lbs | |
| Make up length | 25.5” (0.65m) | |
| Volume | 0.06ft3 | |
| Min. Casing Size | Max. Casing size | |
| Adjustable Casing Range | 5”- #24 (ID 4”) | 8-⁵/8”- #32 (ID 7.921”) |
| Load carry capability range1 | 100 lbs | |
| Drag Coefficient, dynamic | 3% | |
| Drag Force | 6 lbs | |
| Temperature rating | 400°F | |
| Pressure rating | 20,000 psi | |
| Collapsed OD | 3.7” | |
| Centraliser connection | Titan, 1-³⁄₁₆"-12 GO | |
| Electrical specification | 600VDC / 2A | |
- 1. Capability is dependent on temperature and Casing ID.
| Body | 17-4 PH SS, Heat treated H1075 |
|---|---|
| Bearings | Custom Bush Bearing |
| Grease | Lubriplate 930AA |
| Attachment | In-line |
| SWL, Tensile | 63,000 lbs |
Charts & Diagrams
Other models in this family
All Focus™ Centralisers →| Model | Hole size | Bore | Temp | Weight |
|---|---|---|---|---|
| CP12 CP12 — Centering Parallelogram for 12in | 10-1/8″ – 17-1/2″ | 4-1/2″ | 400°F | 45 lbs |
| CP8 CP8 — Co-Pivot Centraliser for 8.5in | 7-1/2″ – 8-1/2″ | 3-5/8″ | 400°F | 39 lbs |
| CA7 CA7 — Centering Adjustable Taxi for 7in | 7″ | 3-5/8″ | 400°F | 15 lbs |
| CRIL CRIL — Centraliser Rocker In-Line | 4-1/2″ – 7″ | — | 350°F | 65 lbs |
| CRU CRU — Centraliser Rocker for USIT | 4-1/2″ – 7″ | — | 400°F | 23 lbs |
| CX9 CX9 — Helix Centraliser | 7″ – 9-5/8″ | 3-5/8″ | 400°F | 40 lbs |
| CX13 CX13 — Helix Centraliser | 7″ – 13-5/8″ | — | 400°F | 45 lbs |