Centering
Centering Taxi TTB-X-515
Centralises tool strings in an 8.5” wellbore and 9-5/8” casing with < 0.01” eccentricity.
TTB-X-515
Description
TTB-X-515 Taxis are used to centralise tool strings in an 8.5” wellbore.
Taxis lock securely onto the housings or into c-spanner recess holes. Taxi wheels run on ball bearings in a sealed, pressure compensated, lubricant bath providing the lowest friction in class.
Applications
- Tool centralization without the need for inefficient drag-inducing centralisers
- Cement evaluation services centralization in 9 5/8” CSG.
- Gravity logging up to 80 degrees well deviation
- Stick-slip and cable tension reduction
- Eliminate risk of tool differential sticking by offsetting tools from the borehole without the need for additional tool body standoffs
Specifications
| Model | TTB-X-515 |
|---|---|
| Weight | 28 lbs |
| Length | 11.6” |
| Volume | 0.06ft3 |
| Min. Hole Size | 8.5” |
| Max. Hole size | 24” |
| Drag Coefficient, dynamic | 2% |
| Drag Coefficient, Static | 4% |
| Temperature rating | 350°F |
| Pressure rating | 30,000 psi |
| Taxi OD | 7.7” |
| Taxi Bore1 | 3-⅝” |
| Eccentricity in 8.5” Wellbore2 | < 0.01” |
- 1Fits a 3-5/8” logging tool and a 3-3/8” tool housing via a reducing sleeve.
- 2See next page for examples on different casing sizes
| Body | 17-4 PH SS, Heat treated H1150 |
|---|---|
| Bearings | Custom ball bearing |
| Lubrication | Active Diaphragm, Nitrile < 230°F Active Diaphragm, Viton < 480°F |
| Grease | Lubriplate 930AA |
| Fastening | 304 Stainless Steel Cap Screws 1/4”, 3/16” hex UNC thread |
| Attachment | Alloy Steel grub Screw , 1/4” hex, UNC Thread, Dog end type |
| SWL for fishing | 50,000 lbs |
| SWL Shear Set Screws | 8,500 lbs |
Charts & Diagrams
Other models in this family
All Tool Taxis →| Model | Role | Bearing | Hole size | Bore | Temp | Weight |
|---|---|---|---|---|---|---|
| TTA-505, TTB-505 Orienting Taxis TTA-505 & TTB-505 | Orient | Type A (carbide) / Type B (ball) | 8″ – 17-1/2″ | 3-5/8″ | 350°F | 26 lbs |
| TTA-515, TTB-515 Conveyance Taxis TTA-515 & TTB-515 | Convey | Type A (carbide) / Type B (ball) | 8″ – 24″ | 3-5/8″ | 350°F | 26 lbs |
| TTB-715 Conveyance Taxi TTB-715 | Convey | Type B (ball) | 8-1/2″ – 24″ | 3-7/8″ | 350°F | 28 lbs |
| TTB-S75, TTB-S75U, TTB-S85 Formation Tester Taxis TTB-S75 & TTB-S85 | Formation testing | Type B (ball) | 8-1/4″ – 22″ | 5″ | 350°F | 22 lbs |
| TTC-IL6O, TTB-IL6O In-line Orienting Tool Taxi TTB/TTC-IL6O | In-line orient | Type B (ball) | 5-7/8″ – 8-1/2″ | — | 350°F | 32.8 lbs |
| TTB-IL6C In-line Conveyance Tool Taxi TTB-IL6C | In-line convey | Type B (ball) | 5-7/8″ – 8-1/2″ | — | 350°F | 32.8 lbs |