Description
Junk Sub (Fishing Cup) is normally used to catch and remove junks that are too heavy to be circulated preventing them from settling at the bottom of the well-bore. Typical junks are shivers and fallen objects such as carbide tooth, drill bit and bearings which are too heavy to be removed from the well- hole through conventional fluid circulation. Junk Sub’s main function is to keep well bottom clean to increase bit service life, reduce and prevent drill bit from unexpected damage.
Specifications:
| Model | Bottom Conn. × Top Conn | OD of cup(mm) | OD of upper end | ID (mm) | L of cup(mm) | OAL(mm) | Hole size(mm) |
|---|---|---|---|---|---|---|---|
| LB79 | 2 3/8REG B*2 3/8REG P | 79 | 79 | 19 | 250 | 845 | 88.9～98.4 |
| LB89 | 2 3/8REG B*2 3/8REG P | 89 | 78 | 19 | 250 | 845 | 108～117.5 |
| LB94 | 2 3/8REG B*2 3/8REG P | 94 | 79 | 19 | 250 | 850 | 108～117.5 |
| LB102 | 2 7/8REG B*2 7/8REG P | 102 | 93.5 | 31.8 | 250 | 850 | 117.5～124 |
| LB114 | 3 1/2REG B*3 1/2REG P | 115 | 105.5 | 38.1 | 250 | 915 | 130～149 |
| LB127 | 3 1/2REG B*3 1/2REG P | 127 | 108 | 38.1 | 250 | 850 | 152.4～162 |
| LB133 | 3 1/2REG B*3 1/2REG P | 133 | 108 | 38.1 | 250 | 875 | 152.4～162 |
| LB140 | 3 1/2REG B*3 1/2REG P | 140 | 108 | 38.1 | 250 | 875 | 165～190.5 |
| LB146 | 3 1/2REG B*3 1/2REG P | 146 | 108 | 38.1 | 250 | 875 | 168～190.5 |
| LB165 | 4 1/2REG B*4 1/2REG P | 165 | 140 | 57.2 | 250 | 915 | 190.5～216 |
| LB168 | 4 1/2REG B*4 1/2REG P | 168 | 140 | 57.2 | 250 | 915 | 190.5～216 |
| LB178 | 4 1/2REG B*4 1/2REG P | 178 | 146 | 57.2 | 250 | 915 | 219～244.5 |
| LB194 | 4 1/2REG B*4 1/2REG P | 194 | 146 | 57.2 | 250 | 950 | 229～273 |
| LB200 | 4 1/2REG B*4 1/2REG P | 200 | 146 | 57.2 | 250 | 950 | 229～273 |
| LB219 | 6 5/8REG B*6 5/8REG P | 219 | 197 | 76.2 | 250 | 950 | 244～289 |
| LB241 | 6 5/8REG B*6 5/8REG P | 241 | 197 | 76.2 | 250 | 950 | 292～330 |
| LB245 | 6 5/8REG B*6 5/8REG P | 245 | 203 | 76.2 | 250 | 950 | 292～330 |
| LB245 | 6 5/8REG B*6 5/8REG P | 245 | 197 | 88.9 | 250 | 940 | 292～330 |
| LB273 | 6 5/8REG B*6 5/8REG P | 273 | 203 | 76.2 | 250 | 950 | 330～375 |
| LB286 | 6 5/8REG B*6 5/8REG P | 286 | 203 | 76.2 | 250 | 1000 | 330～375 |
| LB327 | 7 5/8REG B*7 5/8REG P | 327 | 241.3 | 76.2 | 250 | 1050 | 375～444.5 |
| LB327 | 7 5/8REG B*7 5/8REG P | 327 | 225.4 | 102 | 250 | 1000 | 375～444.5 |
| LB340 | 7 5/8REG B*7 5/8REG P | 340 | 225.4 | 76.2 | 250 | 1080 | 381～444.5 |
| LB381 | 7 5/8REG B*7 5/8REG P | 381 | 241.3 | 76.2 | 250 | 1065 | 432～508 |
| LB473 | 7 5/8REG B*7 5/8REG P | 473 | 241.3 | 76.2 | 250 | 1120 | 508～559 |
Drawing：
