89mm wili paipu no ka luawai wai me ke kaula API IF
ʻO kēia paipu wili luawai wai, ʻo ke ʻano pōkole o lalo o ka paipu wili lua, he ʻano ʻano pahu drill palahalaha waho.Hoʻohana nui ʻia ia i ka rotary percussive drilling i loaʻa nā kinoea a me nā wai.ʻO kona mau mea nui he paipu (koʻokoʻo) kino a me ka hui.
Hana ʻia kā mākou paipu hoʻoheheʻe i lalo ma muli o nā kūlana API.A e like me nā koi kikoʻī, hāʻawi pū mākou i kēia ʻano DTH drill pipe ma nā kikoʻī Kina a me ʻAmelika.
E like me kona mau pono, loaʻa iā ia nā hiʻohiʻona o ka rigidity nui, ka hiki ke hoʻopaʻa maikaʻi ʻana, ka papa waho waho, a me ka haʻahaʻa haʻahaʻa a me ke kūpaʻa i ka wā e huli ai.
No ka hoʻopili ʻana, e hoʻopili ʻia kahi pūʻulu o nā paipu wili DTH e hoʻokahi pahu kila, a ʻo kahi pūʻolo he 30 a 40 mau paipu wili.
Nā ʻāpana ʻenehana o DTH Drill Pipe (Outer Flat Drill Rod):
| Anawaena | Ka lōʻihi | Wrench Flats | Nā Loko |
| 50-194mm | 500-10700mm | 40、57、65、75、83、95mm | F42×10 F48×10 2 3/8''API REG |
| 2 7/8''API REG 3 1/2''API REG 2 3/8''API IF | |||
| 3 1/2”BECO 4”BECO 4 1/2”BECO | |||
| 5 1/4”BECO |
