hollow stem auger for large hole water well drilling
Roschen group limited has an extensive product range for drilling. We can deliver the following as well as many other products:
Drill pipes:
- straight flush drill pipes
- reverse circulation drill pipes
- single-walled and double-walled airlift drill pipes
- counter flush drill pipes
- special drill pipes
Telescopic drill pipes
Casing/percussion drill pipes
Bits in many models
Augers and hollow stem augerse
Threaded/quick connections
Reels for geothermal loops
General drilling rig components/partial installations
Roschen group limited can also supply replacement components and tools for your drilling rig.
| Hollow Stem Augers | ||||
| Inside Diameter (cm) | Model | Flight O.D. | Auger Head Size (hole size) | Center Rod System |
| 2 1/4"(5.7 cm) | standard | 5 5/8"(14.3 cm) | 6 1/4"(15.9 cm) | Drill Rod |
| 2 3/4"(7.0 cm) | standard | 6 1/8"(15.6 cm) | 6 3/4"(17.1 cm) | Drill Rod |
| 3 1/4"(8.3 cm) | standard | 6 5/8"(16.8 cm) | 7 1/4"(18.4 cm) | drill rod or hex rod |
| 3 1/4"(8.3 cm) | H.D. | 6 5/8"(16.8 cm) | 7 1/4"(18.4 cm) | drill rod or hex rod |
| 3 3/4"(9.5 cm) | standard | 7 1/8"(18.1 cm) | 7 3/4"(19.7 cm) | drill rod or hex rod |
| 3 3/4"(9.5 cm) | H.D. | 7 1/8"(18.1 cm) | 7 3/4"(19.7 cm) | drill rod or hex rod |
| 4 1/4"(10.8 cm) | standard | 7 5/8"(19.4 cm) | 8 1/4"(21.0 cm) | drill rod or hex rod |
| 4 1/4"(10.8 cm) | H.D. | 8 1/8"(20.6 cm) | 9"(22.9 cm) | drill rod or hex rod |
| 4 1/4"(10.8 cm) | X.H.D. | 8 1/4"(21.0 cm) | 9"(22.9 cm) | drill rod or hex rod |
| 6 1/4"(15.9 cm) | standard | 9 5/8"(24.4 cm) | 10 1/2"(26.7 cm) | drill rod or hex rod |
| 6 1/4"(15.9 cm) | H.D. | 10 1/4"(26.0 cm) | 11"(27.9 cm) | drill rod or hex rod |
| 6 1/4"(15.9 cm) | X.H.D. | 10 1/4"(26.0 cm) | 11"(27.9 cm) | drill rod or hex rod |
| 7 1/4"(18.4 cm) | X.H.D. | 11 1/4"(28.6 cm) | 12"(30.5 cm) | hex rod |
| 8 1/4"(21.0 cm) | H.D. | 12 1/4"(31.1 cm) | 13"(33.0 cm) | drill rod or hex rod |
| 10 1/4"(26.0 cm) | H.D. | 14"(35.6 cm) | 14 3/4"(37.5 cm) | hex rod |
| 12 1/4"(31.1 cm) | H.D. | 17 1/4"(43.8 cm) | 18 1/2"(47.0 cm) | hex rod |
ROSCHEN@ INC.
ROSCHEN@ GROUP LIMITED
ROBERT ROSCHEN@ LIMITED
ROSCHEN@ HOLDINGS LIMITED
HEFEI ROSCHEN@ TOOL CO., LTD.
ROSCHEN@ GEOLOGICAL TOOL CO.,LTD.
SHANGHAI ROSCHEN@ INTERNATIONAL CO., LTD.
ROSCHEN@ GEOLOGICAL INSTRUMENTS CO., LTD.
EMAIL: roschen@roschen.com ; roschen@roschen.net
Website: http://www.roschendrill.com
http://www.roschenmining.com
http://www.roschendrilling.com
http://www.explorationcoredrilling.com
http://www.roschen.net
http://www.roschen.cn
http://www.roschen.com
