Mapaipi obowola a DTH amagwira ntchito yofunika kwambiri pakubowola kwa DTH, mosasamala kanthu za mtundu wa thanthwe, kuya kwa dzenje kapena chobowolera.

Zofunikira za chubu chapamwamba cha DTH ndikukhazikika, kulondola komanso kuwongolera.

 Drill Pipe :

1.Pipe thupi: ozizira kujambula chitoliro seamless.kotero chitolirocho chimakhala ndi kukula kolondola, chabwino chapakati.
2.Zakuthupi za thupi la Pipe ndizofanana ndi Sandvik.
3.Thread cholumikizira:Kutentha ndi nayitrogeni mankhwala, kotero chitoliro ndi cholimba kwambiri ndi zosavuta kutsegula ndi kutsitsa.
4.Friction kuwotcherera.

Standard DTH kubowola chitoliro:

M'mimba mwake: 76mm, 89mm, 102mm, 114mm, 127mm, 140mm;

Utali: 1000mm, 1500mm, 2000mm, 3000mm, 5000mm, 6000mm;

Thread: 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