Nā ʻāpana wiliwili IADC637 9 7/8” (250.8mm)

ʻO 9 7/8" he 250mm ke anawaena, ʻo ka pilina kaula he 6 5/8 reg pin e like me ka kikoʻī API.
ʻO ke ʻano o IADC537 he kūpono ka tricone roller bit no ka ʻeli ʻana i nā pōhaku paʻakikī e like me nā quarzite streaks, granites, a me nā mea ʻē aʻe. Ua sila ʻia ka bearing me ka elastomer e hoʻonui i ke ola hana.
ʻO nā hoʻokomo carbide Tungsten (TCI) he metala paʻakikī loa ia no ka ʻeli ʻana i nā pōhaku paʻakikī, ua hoʻokomo piha ʻia ke kuʻekuʻe wāwae o nā cones a me ke kua lima me nā niho Tungsten Carbide.
He nui maʻamau ia ma ke kahua mining, no ka wili ʻana i ka lua pahū. I ka wili ʻana i ka mining, ʻo ka helu mua no ke code IADC he 6,7,8 maʻamau, a ʻo ke kolu o ka helu he 2 a me 5.
Wahi a nā kikoʻī IADC no ka ʻāpana tricone, "2" ʻo ia hoʻi ka ʻāpana roller bearing hāmama maʻamau, a ʻo "5" ʻo ia hoʻi ka ʻāpana roller bearing i hoʻopaʻa ʻia me ka pale ana.
Ma kekahi mau ʻāina, hoʻohana pinepine ʻia ka 9 7/8" (250.8mm) e wili i ka lua wai a me ka lua geothermal. Hoʻopuni ʻia ka mea wili e ka wai lepo, ma kahi o ka hoʻopili ʻana i ka ea.
No laila, no nā noi like ʻole, pono mākou e koho i nā ʻāpana wili tricone kūpono.