Umbhobho wokuDla umngxuma wokuqhushumba
Umbhobho wokubhobhoza ngumbhobho wentsimbi onamandla aphezulu osetyenziselwa ukomba.Ngokuxhomekeke kwindlela yokugaya kunye nenjongo yokugaya, imibhobho ifika ngobukhulu obuhlukeneyo kunye nobude, kunye nobude obuqhelekileyo buziimitha ezi-3-10.Imibhobho yokomba idityaniswe enye nganye njengoko ukomba lusiya lusiya nzulu kwilitye.Ngokudibeneyo, imibhobho yenze intambo yokugaya, enokwandisa iikhilomitha eziliqela ukuya emhlabeni.
Umbhobho we-drill ngamnye unamacandelo amathathu adityanisiweyo kunye, inxalenye ephakathi kunye neziqendu ezimbini.Isiqwenga sokugqibela sinendoda ("iphini") okanye ibhinqa ("ibhokisi") intambo, evumela ukudityaniswa kwemibhobho emibini yokubhobhoza.Intambo yonke ye-drill ixhomekeke kwimithwalo ephezulu kakhulu ngexesha lokugaya, kwaye intambo ihlala ibaluleke kakhulu kumbhobho ngamnye.Ukuba ngenxa yaso nasiphi na isizathu umsonto oyindoda nowasetyhini awungeni ngqo omnye komnye, umsonto uya kuqhawuka kwaye uya kuphulukana nawo wonke umtya wakho wokubhola.
| Ubungakanani | Ubunzima obuqhelekileyo Lb/ft | Uhlobo lobunzima obaliweyo | Ubunzima bodonga | |||
| kwi. | mm | lb/ft | kg/m | kwi. | 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 |
