Reverse circulation junk baskets
Note: Reverse circulation junk basket is used to retrieve all types of small junk objects such as cone,cutter,hand tool and junks from the bottom hole.During drilling operation,it produces a local reverse circulation of fluid at well core so as to effect a complete recovery of junk in the junk basket .Especially when PDC bit is used ,cleaning bottom well by the tool becmes very necessary to ensure the bit with a normal application.The reverse circulation junk basket therefore becomes an essential tool in oil ,geology exploration and drilling engineering.
Technical specifications and parameters
Barrel O.D. (mm) | Mill Shoe O.D. (mm) | Max.Fish O.D. (mm) | Ball Dia. (mm) | Connection | Hole Size (mm) |
381 | 386 | 282 | 55 | 7 5/8 REG | 406-444 |
318 | 324 | 248 | 55 | 6 5/8 REG | 349-406 |
286 | 292 | 217 | 55 | 6 5/8 REG | 320-346 |
279 | 286 | 211 | 55 | 6 5/8 REG | 300-341 |
254 | 260 | 195 | 55 | 6 5/8 REG | 275-295 |
245 | 252 | 192 | 50 | NC50 | 275-295 |
232 | 239 | 179 | 50 | NC50 | 255-270 |
206 | 210 | 159 | 45 | NC50 | 223-241 |
195 | 202 | 149 | 42 | NC50 | 215-241 |
178 | 184 | 130 | 42 | NC50 | 198-209 |
168 | 174 | 123 | 42 | NC50 | 190-209 |
130 | 136 | 94 | 40 | NC31 | 155-165 |
121 | 126 | 90 | 35 | NC31 | 142-152 |
114 | 121 | 82 | 35 | NC31 | 130-140 |
97 | 103 | 62 | 30 | NC26 | 117-127 |
89 | 94 | 55 | 30 | NC26 | 108-114 |



