Ukucaciswa okungu-60kg Usayizi Ogcwele we-Tricone Bit Wokukhiqiza Ukubhoboza Umthombo Wamafutha
Ifakwe isinxephezelo sokucindezela esilungiselelwe kahle kanye nohlelo lokuthambisa oluvaliwe, ivimbela ngempumelelo ukungena kodaka futhi inciphise ukulahleka kokungqubuzana ngesikhathi sokubhoboza imbobo ephansi isikhathi eside, yandisa kakhulu umjikelezo wesevisi futhi yehlisa izindleko zokufaka kabusha njalo. Isakhiwo sokuvikela igeyiji esenziwe ngomshini sigcina ububanzi obuzinzile be-wellbore, sithuthukisa ukuqondile kokubhoboza kanye nokusebenza kahle kokwakhiwa.
Njengoba inencazelo ephelele ejwayelekile engu-60kg, le thikithi ye-tricone inokuqina okuzinzile kanye nokumelana okuhle kakhulu nokushaqeka, ifanelana kahle nemishini yokumba evamile yemithombo yokukhiqiza uwoyela ogwini. Yamukelwa kabanzi yizinkampani zezinsizakalo zasensimini kawoyela njengesengezo sokumba esithembekile nesingabizi kakhulu sokukhishwa kwamafutha nsuku zonke kanye namaphrojekthi okuqedwa kwemithombo.
| I-IADC | Ukwakheka kwamadwala | I-WOB (KN/mm) | I-PRM(r/min) |
| 417/427/437 | Amandla aphansi okucindezela, ikhono eliphezulu lokubhoboza kanye nokwakheka okuthambile kakhulu, njenge-shale, ubumba, itshe lesihlabathi, i-conglomerate njll. | 0.35~0.90 | 140~70 |
| 447 | Amandla aphansi okucindezela, ikhono eliphezulu lokubhoboza kanye nokwakheka okuthambile, njenge-shale, ubumba, itshe lesihlabathi, i-limestone ethambile, idwala likasawoti, i-plaster njll. | 0.35~1.00 | 140~60 |
| 517 | Amandla aphansi okucindezela, ikhono eliphezulu lokubhoboza kanye nokwakheka okuthambile, njenge-shale, ubumba, itshe lesihlabathi, i-limestone ethambile, idwala likasawoti, njll. | 0.35~1.05 | 120~50 |
| 527 | Ukwakheka okuthambile okunokucindezela okuncane, njengokuqina okuphansi kokucindezela, ikhono eliphezulu lokubhoboza kanye nokwakheka okuthambile, njenge-shale, ubumba, itshe lesihlabathi, i-limestone ethambile, idwala likasawoti, i-anhydrite njll. | 0.35~1.05 | 120~50 |
| 537/547 | Amandla aphansi okucindezela, ukwakheka okuqinile okuphakathi nendawo okune-interlayer eqinile, njenge-Hard shale, i-anhydrite, i-limestone ethambile, itshe lesihlabathi, i-dolomite ene-mezzanine, njll. | 0.50~1.05 | 110~40 |
| 617/627 | Amandla aphezulu okucindezela, ungqimba oluqinile oluphakathi nolukhulu, njenge-shale eqinile, i-limestone, i-sandstone, i-dolomite, njll. | 0.50~1.05 | 80~40 |
| 637/737 | Amandla aphezulu okucindezela, ukwakheka okuqinile okuphakathi kanye nokuguguleka okuphezulu, njenge-limestone, i-dolomite, i-sandstone, i-chert, njll. | 0.7~1.20 | 70~40 |
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