Roschen DTH Hammer can replace of Atlas Copco's Hammer basis on the
quality.
A QUANTUM LEAP TO WATER
An Roschen QL120 Quantum Leap hammer has successfully been used to
drill a 200 m deep water well in the UK.
The well hole was drilled for an international drinks company in
Gloucestershire by drilling contractor Apex Drilling Services Ltd.
Using the Roschen related QL 120 hammer, the hole was drilled
through a limestone sequence, progressing to the Tintern Sandstone
horizon.
“The phases involved drilling a 625 mm hole to a depth of 25 m.
This was followed by the installation of a 510 mm casing that was
grouted in to seal the borehole and avoid ground contamination from
entering the well. Drilling continued to 220 m at 406 mm,” explains
Mike James, Apex Drilling Manager.
James continues: " We removed the shroud for the second phase and
replaced the 610 mm button bit with a 406 mm button bit. We easily
achieved our target and maintained good flushing."
QL200 General Specifications:
| Description | Standard | Special |
| English | Metric | English | Metric |
| Standard drill pipe connection (see options) | 8-5/8 API reg pin | 8-5/8 API reg pin |
| Outside diameter (inch & mm) | 15.6 | 396 | 15.6 | 396 |
| Length w/o bit shoulder to shoulder (inch & mm) | 65.8 | 1,670 | 72.1 | 1,831 |
| Length with bit extended (inch & mm) | 75.3 | 1,911 | 83.5 | 2,120 |
| Length with bit retracted (inch & mm) | 73.3 | 1,861 | 81.5 | 2,069 |
| Weight w/o bit (lb & kg) | 2,579 | 1,172 | 2,983 | 1,356 |
| Backhead across flats (inch) | Special Wrench/Tongs Required |
| Minimum bit size (inch & mm) | 17.5 | 444 | 28 | 711 |
| Maximum bit size (inch & mm) | 26 | 660 | 36 | 914 |
| Bore (inch & mm) | 12.25 | 311 | 12.25 | 311 |
| Piston weight (lb & kg) | 610 | 277 | 610 | 277 |
| Stroke (inch & mm) | 4 | 102 | 4 | 102 |
| Maximum pressure differential (psig & bar) | 250 | 17 | 250 | 17 |
| Maximum choke diameter (inch & mm) | 0.88 | 22.3 | 0.88 | 22.3 |
| Make-up torque (ft-lb. & N-m) | 18,000 | 24,372 | 18,000 | 24,372 |
| Shank style | QL200 | QL200 |
Air Consumption:
| Description | Standard | Special |
| 100 psi/6,9 bar (scfm & l/s) | 1,584 | 747 | 1,584 | 747 |
| blows per minute | 701 | 701 |
| 150 psi/10,3 bar (scfm & l/s) | 2,470 | 1,165 | 2,470 | 1,165 |
| blows per minute | 807 | 807 |
| 200 psi/13,8 bar (scfm & l/s) | 3,389 | 1,599 | 3,389 | 1,599 |
| blows per minute | 923 | 923 |
| 250 psi/17,2 bar (scfm & l/s) | 4,341 | 2,048 | 4,341 | 2,048 |
| blows per minute | 1,049 | 1,049 |
| 300 psi/20,7 bar (scfm & l/s) | 5,324 | 2,511 | 5,324 | 2,511 |
| blows per minute | 1,185 | 1,185 |
| 350 psi/24,1 bar (scfm & l/s) | 6,340 | 2,991 | 6,340 | 2,991 |
| blows per minute | 1,331 | 1,331 |
| Above specifications/ratings are based on initial factory setting. |
For more information please contact:
ROSCHEN INC.
ROSCHEN GROUP LIMITED
ROSCHEN HOLDINGS LIMITED
Skype: ROSCHEN.TOOL , ROSCHEN_GROUP
WeChat: +86-137 6419 5009 ; +86-135 8585 5390
WhatsApp: +86-137 6419 5009 ; +86-135 8585 5390
Email: roschen@roschen.com ; roschen@roschen.net
Website: http://www.roschen.net ; http://www.roschen.cn
http://www.roschen.com ; http://www.roschengroup.com
