Ke kumu kūʻai ʻo API tricone drill bit IADC216 4 5/8 iniha (118mm)

Hoʻohana nui ʻia ʻo 4 5/8 "TCI tricone bit i ka ʻeli ʻana i ka wai, ka ʻimi ʻana, ka lua hoʻokele HDD, ka hoʻokumu ʻana i ke kahua, he hoʻolālā lua jet kona, no laila hiki ke hana ʻia no ka hoʻohuli ʻana i ka hoʻoheheʻe ʻana.
Hoʻopaʻa ʻia ka bearing, ʻoi aku ka lōʻihi o ke ola o ka hana ma mua o nā ʻāpana roller bearing open.
ʻO kēia ʻano ʻano niho kila tricone bit he lua waena i kūpono no ka hoʻoheheʻe RC (Reverse Circulation drilling).
Hiki i ka IADC216 tricone bit ke wili i nā hana ʻoi aku ka paʻakikī ma mua o ka IADC126, ʻo ke koho ʻana i ka IADC kūpono e like me ka paʻakikī o nā pōhaku ʻo ia ka hana mua o ka wili kiʻekiʻe. ʻO Far Eastern Drilling kahi hale hana API i hōʻoia ʻia o ka tricone roller bit.