Nā ʻāpana niho wili ʻia IADC216 6.5 ʻīniha (165mm) no ka ʻeli ʻana i ka luawai

Hiki i ka Hikina Mamao ke uhi i ka aneane āpau o nā code IADC. He wikiwiki ka wikiwiki o ka ʻeli ʻana o ka bit triocne. Hiki i ka ʻōnaehana bearing hilinaʻi a me ka hana lōʻihi ke mālama i ke kumukūʻai ʻeli.
ʻUwila niho kila 13 5/8"
Nā Hiʻohiʻona Nui:
1. Nā nui mai 3 7/8" a i 26".
2. Uhi i ka aneane āpau o nā code IADC.
3. Hoʻohana ʻia ka mea ʻoki hoʻokomo tungsten carbide o ka ikaika kiʻekiʻe a me ka paʻakikī e hoʻonui i ke kūpaʻa hopena o nā mea ʻoki a hoʻemi i ka helu haki.
4. ʻO nā hiʻohiʻona o nā ʻāpana TCI e alakaʻi ai i kona hoʻokumu ʻana i ka ʻeli ʻana he mau pōhaku paʻakikī, e like me ka limestone, dolomite, chert, firm one, firm anhydrite, etc.
3. Hoʻohana nui ʻia i ka ʻimi ʻaila, ka ʻimi ʻana i nā mining, ka ʻeli ʻana i ka luawai wai, ka wela o lalo o ka honua, ka hydrology, a pēlā aku.
3. Hiki ke hana ʻia nā ʻāpana e like me kāu kauoha kūikawā.
5. Loaʻa i kā mākou huahana ka hilinaʻi maikaʻi a me ke kumukūʻai hoʻokūkū
6. Loaʻa nui nā huahana hou a me nā huahana i hoʻohana ʻia.