Down it gat dth sd missy 6 "hammer en bit priis
Yn oare tapassingen, lykas stiftingsboarjen, kinne DTH-hammers wurde brûkt mei ien bit yn gatgrutte oant .750 mm (30 inch).Mei meardere hammer-ienheden CD (Cluster drills) boarje gatten oant 70″ of 1778 mm.
As thumbregel is de lytste gatdiameter dy't in DTH-hammer kin boarje, de nominale grutte.In 4 inch hammer sil in 4 inch (102 mm) gat boarje.De beheinende faktor is de bûtendiameter fan 'e hammer, om't, as gatdiameter fermindert, luchtstream beheind is.Maksimale gatgrutte foar produksjeboarring is de nominale hammergrutte plus 1 inch, dus foar in 4 inch hammer is de maksimale gatgrutte 5 inch (127–130 mm).
Kieze fan de rjochter hammer wurdt foar in grut part bepaald troch gat grutte en type rock formaasje.Ideal, de grutte fan 'e hammer moat oerienkomme mei de fereaske gat diminsje sa nau mooglik, wêrtroch krekt genôch romte foar stekken te evakuearjen it gat.
Model | Thread Connection | OD (mm) | Rec.Hole Grutte | Shank Style | Wurkdruk (Bar) |
CD35 | API 2 3/8" Reg | φ82mm | φ90-φ105 | DHD3.5 CD35 | 1.0-1.5Mpa |
CD45 | API 2 3/8" Reg | φ99mm | φ110-φ135 | Cop44 DHD340 CD45 | 1.0-2.5Mpa |
CSD4 | API 2 3/8" Reg | φ99mm | φ110-φ135 | SD4 CSD4 | 1.0-2.5Mpa |
CQL40 | API 2 3/8" Reg | φ99mm | φ110-φ135 | QL40 CQL40 | 1.0-2.5Mpa |
CD55 | API 2 3/8" Reg API 3 1/2" Reg | φ125 mm | φ135-φ155 | Cop54 DHD350R CD55 | 1.0-2.5Mpa |
CSD5 | API 3 1/2" Reg | φ125 mm | φ135-φ155 | SD5 CSD5 | 1.0-2.5Mpa |
CQL50 | API 3 1/2" Reg | φ125 mm | φ135-φ155 | Cop54 QL50 CQL50 | 1.0-2.5Mpa |
CD65 | API 3 1/2" Reg | φ148mm | φ155-φ190 | Cop64 DHD360 CD65 | 1.0-2.5Mpa |
CSD6 | API 3 1/2" Reg | φ148mm | φ155-φ190 | SD6 CSD6 | 1.0-2.5Mpa |
CQL60 | API 3 1/2" Reg | φ148mm | φ155-φ190 | Cop64 QL60 CQL60 | 1.0-2.5Mpa |
CD85 | API 4 1/2" Reg | φ185 mm | φ195-φ254 | Cop84 DHD380 CD85 | 1.0-2.5Mpa |
CSD85 | API 4 1/2" Reg | φ185 mm | φ195-φ254 | SD8 CSD8 | 1.0-2.5Mpa |
CQL80 | API 4 1/2" Reg | φ185 mm | φ195-φ254 | QL80 CQL80 | 1.0-2.5Mpa |
CSD10 | API 4 1/2" Reg API 5 1/2" Reg API 6 5/8" Reg | φ225 mm | φ254-φ311 | SD10 CSD10 | 1.0-2.5Mpa |
CN100 | API 6 5/8" Reg | φ225 mm | φ254-φ311 | NUMA100 CN100 | 1.0-2.5Mpa |
CSD12 | API 6 5/8" Reg | φ275 mm | φ305-φ445 | SD12 CSD12 | 1.0-2.5Mpa |