Conveyance Taxis
Conveyance Taxis TTA-515 & TTB-515
Slip-over conveyance taxis with 1.5” standoff in an 8.5” wellbore for hole sizes up to 24”.
Description
The 515 series conveyance taxis provide 1.5” standoff in an 8.5” wellbore and run in hole sizes up to 24”. Two bearing options are available: the TTA-515 with tungsten carbide bush bearings (gravity logging to 70° deviation) and the TTB-515 with sealed ball bearings (to 80° deviation).
Taxis lock securely onto the tool housings or into c-spanner recess holes and fit both 3 5/8” and 3 3/8” logging tool housings.
Applications
- Gravity logging in high deviation wells using a slip-over wheel design
- Orient logging tool sensors, cores, pressure measurements and samples without the need for standoffs, bow springs, tool turners etc.
- Stick-slip and cable tension reduction
- Eliminate risk of tool differential sticking by offsetting tools from the wellbore wall
- Robust design. Very low maintenance requirement.
Specifications
| Model | TTA-515 | TTB-515 |
|---|---|---|
| Weight | 26 lbs | 27 lbs |
| Length | 10.4” | |
| Volume | 0.05ft3 | |
| Min. Hole Size | 8” | |
| Max. Hole size | 24” | |
| Drag Coefficient, dynamic | 5% | 2% |
| Drag Coefficient, Static | 12% | 4% |
| Temperature rating | 350°F | |
| Pressure rating | 30,000 psi | |
| Taxi OD | 7-¼” | |
| Wheel diameter | 6” | |
| Taxi Bore1 | 3-⅝” | |
| Standoff in 8.5” Wellbore2 | 1.5” | |
- 1Fits a 3-5/8” logging tool and a 3-3/8” tool housing via a reducing sleeve. Other version , TTA-715 is available with a 3.7” bore.
- 2Set Standoff parameters to appropriate offset, see next page.
| Body | 17-4 PH SS | |
|---|---|---|
| Bearings1 | Tungsten Carbide composite | Custom ball bearing |
| Lubrication | Passive | Active Diaphragm: Nitrile < 230°F 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 | |
- 1Tungsten carbide must not be subjected to shock loadings, Do not hit with a hammer or use gas torch
| Bit Size | Tool Housing OD: | |
|---|---|---|
| 3-3/8” | 3-5/8” | |
| 8 1/2” | 1.6” | 1.5” |
| 9 7/8” | 1.5” | 1.4” |
| 12 1/4” | 1.4” | 1.3” |
| 17 1/2” | 1.3” | 1.2” |
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 |
| 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 |
| TTB-S75, TTB-S75H, TTB-S75U, TTB-S85 Formation Tester Taxis TTB-S75 & TTB-S75H | Formation testing | Type B (ball) | 8-1/4″ – 14-3/4″ | 5″ | 350°F | 23 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 |
| TTB-S52 In-line Tool Taxi for ORA — TTB-S52 | In-line formation testing | Type B (ball) | 5-7/8″ – 6-3/4″ | 0.3″ | 350°F | 64 lbs |
| TTB-ILHO In-line Orienting Tool Taxi — TTB-ILHO (DITS / LOGIQ) | In-line orient | Type B (ball) | 5-7/8″ – 8-1/2″ | — | 350°F | 47.4 lbs |
| TTB-ILHC, TTB-IQC In-line Conveyance Tool Taxi — TTB-ILHC (DITS / LOGIQ) | In-line convey | Type B (ball) | 5-7/8″ – 8-1/2″ | — | 350°F | 47.4 lbs |
| TTB-J75 Jar Wheels — TTB-J75 (Thor Jar Taxi) | Jar wheels (Thor) | Type B (ball) | 8-1/4″ – 14-3/4″ | 4-1/8″ | 400°F | 33 lbs |
| W180 W180 — 180 lbf Weight Bar | Weight bar | — | 5″ | — | 350°F | 186 lbs |