Cased Hole
CRIL — Centraliser Rocker In-Line
Patented Rocker centraliser for in-line connection — perfect centralization in 4-1/2” to 7” casing.
Description
A ground-up analysis of centraliser mechanics and current logging applications led to Petromac’s revolutionary “Rocker” centraliser for cased hole service.
The patented Rocker centraliser incorporates a rocker in each of the arm assemblies which pivots about the centreline. The rocker wheels contact opposing sides of the casing ensuring perfect centralization.
The CRIL (Centraliser Rocker In-Line) is designed for in-line connection within the tool string.
This tool incorporates Petromac’s unique bearing technology which has enabled our family of devices to descend by gravity to world-record deviations
The CRIL Rocker centraliser is configured for centralization in 4.5” to 7” casing sizes and is available in two size configurations, standard and small:
4-1/2”to 7” with a collapse diameter of 3-5/8” (1” wheel)
4-1/2”to 7” with a collapse diameter of 3-3/8” (7/8” wheel).
Standard Kit
Small Kit
Applications
- Centralization of wireline logging tools
- Tool Conveyance on highly deviated wells
Specifications
| Model | CRIL | |
|---|---|---|
| Weight | 65 lbs [29.5 kg] | |
| Length | 3.74ft [1.14m] | |
| Volume | 0.11ft3 | |
| Configurations | Small Kit | Standard |
| Min. Casing size | 4-½” | 4-½” |
| Max. Casing size | 7” | 7” |
| Minimum OD | 3-⅜” | 3-⅝” |
| Connection1 | In-Line with all through wired tools | |
| Max Load Carry Capability | 200 lbs | |
| Drag Coefficient, dynamic | 2% | |
| Drag Force | 6 lbs | |
| Temperature rating | 350°F | |
| Pressure rating | 20,000 psi | |
- 1Fits threaded connections for 31 pins on 3-3/8” and 3-5/8” tools.
| Body | 17-4 PH SS |
|---|---|
| Bearings | Custom Bush Bearing |
| Grease | Lubriplate 930AA |
| Tensile SWL, For fishing | 30,000 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 |
| 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 |