Nā Kola ʻUli ʻAʻole Magnetic & nā subs
Hana ʻia nā kola wili ʻole-magnetic mai nā kaola kila ʻole-magnetic me ka ikaika haʻahaʻa ma o ka hoʻohui ʻana i kahi loiloi kemika ponoʻī a me ke kaʻina hana hana hāmare rotary me ka permeability magnetic haʻahaʻa a me ka hiki mīkini maikaʻi loa, ʻaʻole ia e hoʻopilikia i nā lako kuhikuhi kūikawā a e hoʻonui i ka hana o ka hana wili.
Hana nā kola wili ʻole-mag ma ke ʻano he hale no nā mea hana MWD, a i ka manawa like e hāʻawi i ke kaumaha no ke kaula wili. kūpono nā kola wili ʻole-mag no nā ʻano wili āpau me nā noi pololei a me ke kuhikuhi.
Nānā piha ʻia kēlā me kēia kola wili e ka ʻoihana nānā kūloko. Hoʻopaʻa ʻia nā ʻikepili āpau i loaʻa ma ka palapala hōʻoia nānā i hāʻawi ʻia me kēlā me kēia kola wili. Ua hoʻopaʻa ʻia ka monogram API, ka helu serial, OD, ID, ke ʻano a me ka nui o nā pilina ma nā pālahalaha wili i hoʻopaʻa ʻia.