Fipoahana Lavaka Drill Pipe
Ny sodina fandavahana dia sodina vy mahery vaika ampiasaina amin'ny fandavahana.Miankina amin'ny fomba fandavahana sy ny tanjon'ny fandavahana, ny sodina dia tonga amin'ny hateviny sy ny halavany, ary ny halavany mahazatra indrindra dia 3-10 metatra.Atambatra tsirairay ny fantsona fandavahana rehefa miroso lalindalina kokoa amin'ny vatolampy ny fandavahana.Miara-mamorona tady fandavahana ireo fantsona, izay afaka miitatra kilometatra maromaro midina any anaty tany.
Ny sodina fandavahana tsirairay dia misy ampahany telo mitambatra, ampahany afovoany ary tapany roa.Ny tapany farany dia misy kofehy lahy ("pin") na kofehy vavy ("boaty"), izay ahafahana mampifandray fantsona roa.Ny tadin-davaka manontolo dia iharan'ny enta-mavesatra faran'izay mafy mandritra ny fandavahana, ary ny kofehy no ampahany manan-danja indrindra amin'ny fantsona tsirairay.Raha toa ka tsy mifanentana tsara ny kofehy lahy sy vavy, dia mety ho tapaka ilay kofehy ary ho very ny tadin-dava manontolo.
| Size | Faobe nominal Lb/ft | Karazana lanja kajy | Haben'ny rindrina | |||
| in. | mm | lb/ft | kg/m | in. | 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 |
