Roller reamer is designed for various reaming operation. It can be used in hard formation or abrasive formation, in order to keep the standard hole size. When the drill bit wears and under the standard size, roller reamer can ream the bottom well and recover to standard hole size. Whether drilling the vertical well or directional well, three-roller reamer can ensure the following drill bit or casing run into the normal hole size. The features of roller reamer are low frictional resistance with well wall, strong abrasive resistance and long service life.
| Model | Working Or mm(inch) | ID mm(ingh | Body OD mm (inch) | OAL mm(ft) | Roller OD mm(inch) | Roller Length mm(inch) | Connection |
| GL149 | 149.2(5-7/8) | 31.8(1-1/4) | 120.7(4-3/4) | 1400(4.6) | 46(1-13/16) | 200(7-7/8) | NC38 |
| GL152 | 152.4(6 | 31.8(1-1/4) | 120.7(4-3/4) | 1400(4.6) | 50.8(2) | 200(7-7/8) | NC38 |
| GL216 | 215.9(8-1/2) | 44.5(1-3/4) | 165(6-1/2 | 1730(5.7) | 71.4(2-13/16) | 200(7-7/8) | NC50 |
| GL311 | 311.15(12-1/4) | 71.4(2-13/16) | 203(8) | 1900(6.2 | 100(3-15/16) | 300(11-13/16) | 6-5/8REG |
| GL444 | 444.5(17-1/2) | 76.2(3 | 229(9 | 2200(7.2) | 140(5-1/2) | 304(12) | 7-5/8REG |
| GL559 | 558.8(22 | 76.2(3 | 241.3(9-1/2) | 2667(8.8) | 158(6-7/32 | 400(15-3/4) | 7-5/8REG |
| GL660 | 660.4(26 | 76.2(3) | 241.3(9-1/2) | 2867(9.4) | 178(7) | 400(15-3/4) | 7-5/8REG |
| GL711 | 711.2(28) | 76.2(3) | 241.3(9-1/2) | 2867(9.4) | 178(7) | 400(15-3/4) | 7-5/8REG |