PDC Bi Center Bit o te wheketere API mō te keri i raro i te Reamer

Ko te mata poito BI e whakamahia ana mō te whakakī i te raro o te kōhao, ko te tauira Nama e pai ana ki te 5 7/8″*7 1/2″*4 3/4″, ki te 5 7/8″*7 1/2″ rānei, nā te mea kāore he hiranga o te diameter tuatoru.

Ko te diameter whakawhiti ko te 5 7/8″, ko te diameter riaming ko te 7 1/2″, ko te diameter o te mata o mua ko te 4 3/4″.

He wheketere a Far Eastern e tohunga ana ki ngā mata keri, pērā i te mata keri kone hurihuri, te mata keri kone hurihuri tricone, ngā mata keri kone hurihuri, te whakatuwhera poka HDD, me ngā taputapu tapahi roera turanga mō ngā momo whakamahinga rerekē. Kei roto i ngā whakamahinga ko te mara hinu, te hau māori, te tūhura whenua, te keri hohonu, te keri maina, te keri puna wai, te HDD, te hanga, me te turanga.
Hei wheketere mata keri matua i Haina, ko te whakapiki i te roa o te mahi a te mata keri ko tā mātou whāinga. Ka whakapau kaha tonu mātou ki te whakapai ake i ngā mata me ngā reiti urunga teitei. Ko tā mātou whāinga he hoko i te kounga teitei me te utu iti rawa. Mā te kounga me te hangarau o te keri o te Rawhiti Tawhiti koe e āwhina ki te whakatutuki i ngā mea maha atu.