Blast Hole Drill Pipe
Ko te putorino he paipa maitai kaha teitei e whakamahia ana mo te keri.I runga i te tikanga keri me te kaupapa o te keri, he rereke te matotoru me te roa o nga paipa, ko te roa o te nuinga he 3-10 mita.Ka honoa nga paipa drill tetahi ki tetahi i te wa e hohonu haere ana te drill ki roto i te toka.Ka noho tahi nga paipa hei aho wiri, ka taea te toro atu i etahi kiromita ki raro ki te whenua.
E toru nga wahanga o ia paipa drill, he wahanga o waenganui me nga pito e rua.Kei roto i te pito o te pito he miro tane (“pine”) he miro wahine (“pouaka”) ranei, e taea ai te honohono o nga paipa drill e rua.Ko te aho drill katoa ka tukuna ki nga kawenga tino nui i te wa e keri ana, a ko te miro te waahanga tino nui i ia putorino.Mena he take karekau te miro tane me te miro uwha e tino uru ki a raua, ka pakaru pea te miro ka ngaro katoa to aho wiri.
| Rahi | Papatipu ingoa Lb/ft | Momo taumaha kua tatauhia | Te matotoru o te pakitara | |||
| i roto. | mm | lb/ft | kg/m | i roto. | mm | |
| 2 3/8 | 60.3 | 6.65 | 6.26 | 9.32 | 0.28 | 7.11 |
| 2 7/8 | 73 | 10.4 | 9.72 | 14.48 | 0.362 | 9.19 |
| 3 1/2 | 88.9 | 9.5 | 8.81 | 13.12 | 0.254 | 6.45 |
| 3 1/2 | 88.9 | 13.3 | 12.31 | 18.34 | 0.368 | 9.35 |
| 3 1/2 | 88.9 | 15.5 | 14.63 | 21.79 | 0.449 | 11.4 |
| 3 1/2 | 88.9 | 15.5 | 14.63 | 21.79 | 0.449 | 11.4 |
| 4 | 101.6 | 14 | 12.93 | 19.26 | 0.33 | 8.38 |
| 4 1/2 | 114.3 | 13.75 | 12.24 | 18.23 | 0.271 | 6.88 |
| 4 1/2 | 114.3 | 16.6 | 14.98 | 22.31 | 0.337 | 8.56 |
| 4 1/2 | 114.3 | 20 | 18.69 | 27.84 | 0.43 | 10.92 |
| 5 | 127 | 16.25 | 14.87 | 22.15 | 0.296 | 7.52 |
| 5 | 127 | 19.5 | 17.93 | 26.71 | 0.362 | 9.19 |
| 5 | 127 | 19.5 | 17.93 | 26.71 | 0.362 | 9.19 |
| 5 | 127 | 25.6 | 24.03 | 35.79 | 0.5 | 12.7 |
| 5 | 127 | 25.6 | 24.03 | 35.79 | 0.5 | 12.7 |
| 5 1/2 | 139.7 | 21.90 | 19.81 | 29.51 | 0.361 | 9.17 |
| 5 1/2 | 139.7 | 24.70 | 22.54 | 33.57 | 0.415 | 10.54 |
