He koʻikoʻi ko DTH drill pipes i nā DTH drilling a pau, me ka nānā ʻole i ke ʻano o ka pōhaku, ka hohonu o ka lua a i ʻole ka rig drill.

ʻO nā hiʻohiʻona koʻikoʻi o kahi paipu DTH kiʻekiʻe ka lōʻihi, pololei a me ka hoʻokele.

 Paipu Drill:

1.Pipe kino: huki anu anu seamless paipu.No laila, loaʻa ka nui kūpono o ka paipu, ka mea kikowaena maikaʻi.
2. Ua like ka papa o ke kino paipu me Sandvik.
3.Thread connector : Heat and Nitrogen treatment , no laila ʻoi aku ka lōʻihi o ka paipu a maʻalahi hoʻi e hoʻouka a wehe.
4.Friction welding .

DTH drill pipe maʻamau:

Anawaena: 76mm, 89mm, 102mm, 114mm, 127mm, 140mm;

Ka lōʻihi: 1000mm, 1500mm, 2000mm, 3000mm, 5000mm, 6000mm;

Loko: 2 3/8” API REG, 2 7/8” API REG, 3 1/2” API REG, 4 1/2” API REG,

2 3/8 API IF, 3 1/2 API IF