ʻO ke poʻo ʻeli luawai ʻaila API no ka rig rotary no ka hoʻokumu paʻakikī

ʻO 12 1/4" he 311.1mm, kapa pinepine mākou iā 311mm. He nui maʻamau ia no ka papahana ʻeli pōhaku ʻaila. E hoʻohana ʻia kēia ʻāpana tirocne nui no ka liʻiliʻi o nā rigs ʻeli a hoʻohana nui ʻia ia ma ka honua.
He mea nui e koho i ka nui kūpono a me ke ʻano o ka tricone bit i ka wā o ka ʻeli ʻana. He ʻokoʻa ka paʻakikī o nā pōhaku, he palupalu paha, waena, paʻakikī a paʻakikī loa paha. ʻAʻole ʻokoʻa ka paʻakikī ʻoiai hoʻokahi ʻano pōhaku like, e like me ka limestone, shale a me ka one pōhaku he limestone palupalu, limestone waena a me ka limestone paʻakikī, snadstone waena a me ka one pōhaku paʻakikī.
No laila e ʻoluʻolu e haʻi mai iā mākou i nā kūlana kikoʻī piha, e like me ka paʻakikī o ka pōhaku, ke ʻano o ka mīkini wili, ROP (wikiwiki rotary), WOB (Kaumaha o ka bit) a me ka toque. He kōkua nui ia e ʻike i nā ʻāpana kūpono inā hiki iā ʻoe ke haʻi mai iā mākou i ka wili ʻana i ka luawai kū pololei a i ʻole ka wili ʻana i ka pae, ka wili ʻana i ka luawai ʻaila a i ʻole ka wili ʻana me ka ʻole o ka ʻeli ʻana a i ʻole ka paila ʻana i ke kumu.