Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.
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Construction, Foundation Drilling, Oil and Gas, Water well Drilling DTH Hammmer with OD 220MM-650MM
"Down The Hole" (DTH) hammers offers an extensive range of DTH hammers suitable for a wide variety of drilling techniques and environments.
Our designed for drilling piles in complex conditions with rock layers and hard boulders including hardest bed rock.
1. Advantages of construction method
Use:DTH Hammer drilling is a good way to drill through cave formation and avoid stuck problem
Cave:When encountering caves,drill bit inclines to the cave.The stabilizer ensures the hole straightness
Bit stuck；One reason is cave encounter,the drill bit deviates,and the entire set of drilling tools inclines in the hole.The other,is hole collapse.A large number of rock or clay catch the drill pipe,resulting in bit stuck.Steel casing and stabilizer can resolve this problem.
2. Detailed structure information
| TH10/NUMA100/SD10 | SD12/NUMA120/QL120/DHD112/ | NUMA125/TSW14H | TH18/NUMA180 | TH24/NUMA240 | TH28/NUMA280 | |
| Length(less bit) | 1683mm | 1938mm | 1920mm | 2425mm | 2495mm | 2610mm |
| Weight (less bit) | 320kg | 675kg | 850kg | 1530kg | 2540kg | 4236kg |
| External diameter | 220mm | 275mm | 330mm | 406mm | 525mm | 650mm |
| Bits shank | TH10/NUMA100/SD10 | SD12/NUMA120/QL120/DHD112/ | SD12/NUMA120/QL120/DHD112/ | TH18/NUMA180 | TH24/NUMA240 | TH28/NUMA280 |
| Bits diameter | 240mm-311mm | 311mm-445mm | 311mm-445mm | 500mm-700mm | 600-800MM | 800-1000MM |
| Connection thread | API 5 1/2"Reg Pin | API 6 5/8"Reg Pin | API 7 5/8"Reg Pin | 273mm or 320mm Hexagonal | 320mm Hexagonal | 320mm Hexagonal |
| Air pressure | 1.7-2.4Mpa | 1.7-2.5Mpa | 1.7-2.5Mpa | 1.7-2.5Mpa | 1.7-2.5Mpa | 1.7-2.5Mpa |
* Hammers without footvalve are available.
* External diameter of hammer is adjustable according to customers' requests.
* Shock absorbers and Hexagonal Joints are available.
3. Product Application
4. Photos
