Blast Hole Drill Pipe
Pipa pengeboran minangka pipa baja kanthi kekuatan dhuwur sing digunakake ing pengeboran.Gumantung saka cara pengeboran lan tujuan pengeboran, pipa teka ing macem-macem kekandelan lan dawa, kanthi dawa sing paling umum yaiku 3-10 meter.Pipa pengeboran digabungake siji-siji nalika pengeboran luwih jero menyang bedrock.Bebarengan, pipa mbentuk senar pengeboran, sing bisa ngluwihi sawetara kilometer mudhun menyang lemah.
Saben pipa pengeboran kasusun saka telung bagean sing dilas bebarengan, bagean tengah lan rong bagian pungkasan.Potongan pungkasan ngemot benang lanang ("pin") utawa benang wadon ("kothak"), sing ngidini sambungan rong pipa pengeboran.Senar pengeboran kabeh kena beban sing dhuwur banget sajrone pengeboran, lan benang tansah dadi bagian paling kritis ing saben pipa.Yen kanthi alesan apa wae benang lanang lan wadon ora pas karo siji liyane, benang kasebut bakal rusak lan sampeyan bakal ilang kabeh senar pengeboran.
| Ukuran | Nominal massa Lb/ft | Jinis bobot sing diwilang | Ketebalan tembok | |||
| ing. | mm | lb/ft | kg/m | ing. | 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 |
