Open Hole
CP12 — Centering Parallelogram for 12in
The first ever roller centraliser for open hole — centres wireline tools in 12-1/4” boreholes.
Description
The CP12 is the first ever Roller Centraliser for use in open hole. It is designed to centre wireline tools in 12-1/4” boreholes.
A ground-up analysis of centralization mechanics and consideration of logging challenges led to the revolutionary architecture of the CP12.
The patented suspension mechanism and low friction bearings eliminate wellbore drag, ensuring optimum data quality from hi-tech imaging and sonic tool.
The CP12 is compact (16in, 45lbf) which makes it easier to handle, minimizes tool-string weight and allows it to be attached in numerous positions.
Applications
- Centralization of wireline logging tools
- Tool Conveyance on highly deviated wells
- Reduction of Stick & Slip
Specifications
| Bit Size: | ||||
| 12-1/4” | 14-3/4” | 16” | 17-1/2” | |
| Distance from Centre of Borehole | 0.3” | 1.6” | 2.3” | 3.1” |
| Tool housing OD: | ||||
| 3-5/8” | 4.44” | 5” | 5-1/4” | |
| Standoff | 4” | 3.6” | 3.3” | 3.2” |
| Model | CP12 | |
|---|---|---|
| Weight | 45 lbs | |
| Length | 16” | |
| Volume | 0.05ft3 | |
| Maximum OD | 11-¾” | |
| Minimum Hole Size | Open Hole | Cased hole |
| 10-⅝" | 10-1/8" | |
| Collapsed OD | 9.8" | |
| Max Load Carry Capability1 | 500 lbs | |
| Drag Coefficient, dynamic | 5% | |
| Drag Coefficient, Static | 12% | |
| Temperature rating | 400°F | |
| Pressure rating | 30,000 psi | |
| Taxi Bore2 | 4-½” | |
- 1Load capacity can be set by adjusting spring pack, this allows to optimize toolstring design.
- 2Reducing Adapter sleeves are available to fit 4" and 3-5/8” tools.
| Body | 17-4 PH SS |
|---|---|
| Bearings | Custom Carbide Bush Bearing |
| Grease | Lubriplate 930AA |
| Attachment | Alloy Steel grub Screw , 1/4” hex, UNC Thread, Dog end type |
| SWL, Shear set screws | 8,500 lbs |
Charts & Diagrams
Other models in this family
All Focus™ Centralisers →| Model | Hole size | Bore | Temp | Weight |
|---|---|---|---|---|
| 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 |