Nā ʻāpana wili i loko o ka waihona IADC127 7 7/8 iniha (200mm)

Kūʻai nui ʻia nā ʻāpana wili pōhaku niho niho API ma ke kumukūʻai haʻahaʻa a me ka maikaʻi maikaʻi loa mai Kina.
1) Drill Bit Connection i hana ʻia e like me ka maʻamau API.
2) Hiki iā mākou ke hoʻololi i ka nui bit e like me kāu rig.
3) Hiki ke loaʻa ka hopena maikaʻi loa ma o ka hoʻohana ʻana i ka bits-tooth bit i loko o ka stratum palupalu. Inā ʻoi aku ka paʻakikī o ka mining, ʻōlelo ʻia ʻo TCI tricone bitis.
4) Ke hoʻomau nei nā ʻokiʻoki i hōʻoia ʻia a me nā hoʻolālā ʻana i kahi pae kiʻekiʻe o ka hana a me ka hilinaʻi.
5) Hāʻawi ka hydraulics i hoʻonui ʻia i ka ROP ma o ka wehe pono ʻana i nā ʻokiʻoki a me ka hōʻoia ʻana i ke komo ʻana o ka pōhaku hou i kēlā me kēia ʻoki ʻoki ʻana.