Formation Testing
Formation Tester Taxis TTB-S75 & TTB-S85
Slip-over taxis for pressure and sampling tools — carry heavy formation-testing strings fully on wheels.
Description
Tool Taxi specifically designed for Pressure and Sampling tools.
TTB-S 75 / 85 are slip-over tool taxis that lock securely onto 4.75”-5.25” tool housings and allow the heavy formation testing tool string to be fully carried on wheels.
Taxi wheels run on ball bearings in a sealed, pressure compensated, lubricant bath providing the lowest friction in class.
Applications
- Proven gravity logging up to 80° well deviation using a slip-over wheel design
- Orient probe in the desired direction for optimal pressure measurements and samples
- 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
- Robust design with a very low maintenance requirement
Specifications
| Model | TTB-S 75 | TTB-S 85 |
|---|---|---|
| Weight | 22 lbs | 32 lbs |
| Length | 9.5” | 10.5 |
| Volume | 0.04ft3 | 0.06ft3 |
| Min. Hole Size | 8-¼” | 9½” |
| Max. Hole size | 14.75” | 22” |
| Drag Coefficient, dynamic | 2% | |
| Drag Coefficient, Static | 4% | |
| Temperature rating | 350°F | |
| Pressure rating | 30,000 psi | |
| Taxi OD | 7-½” | 8-½” |
| Wheel diameter | 6” | 6-1/4” |
| Taxi Bore1 | 4-¾” | 5” |
- 1Custom TTB-S85 with 5.25” bore (TTB-MDT-S85) is also available for Ultra-High pressure 30KPsi tools. TTB-S75 can be sleeved down to run 4.5” and 4.44”, TTB-S85 can be sleeved down to 4.75” and 4.5”
| 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 Screws1 | 8,500 lbs |
- 1Up to 12,700lb depending on tool modules used.
| Bit Size | Tool Housing OD: | ||
|---|---|---|---|
| 4-3/4” | 4-1/2” | 4.44” | |
| 8 1/2” | 0.8” | 0.9” | 0.9” |
| 12 1/4” | 0.5” | 0.6” | 0.6” |
| 14 3/4” | 0.4” | 0.5” | 0.55” |
| 17 1/2” | 0.3” | 0.4” | 0.47” |
| Bit Size | Tool Housing OD: | |||
|---|---|---|---|---|
| 4-3/4” | 4-1/2” | 4.44” | 5” | |
| 10 5/8” | 1.2” | 1.3” | 1.4” | 1.1” |
| 12 1/4” | 1” | 1.2” | 1.2” | 0.9” |
| 14-3/4” | 0.9” | 1” | 1.1” | 0.8” |
| 17 1/2” | 0.8” | 0.9” | 1” | 0.7” |
The TTB-S75U is a variant of the TTB-S75 with a 5-¼” bore instead of 4-¾”, sized for the physically larger ultra-high-pressure (30,000 psi) sampling tools. It weighs 19.8 lbs and is 9.9” long. Every other specification, including the 30,000 psi pressure rating, is as listed above.
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-X-515 Centering Taxi TTB-X-515 | Centre | Type B (ball) | 8-1/2″ – 24″ | 3-5/8″ | 350°F | 28 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 |