89mm ọkpọkọ ọkpọkọ maka igwu mmiri nke ọma na API Ọ BỤRỤ na eri
Nke a na-egwupụta mmiri nke ọma na-egwupụta ọkpọkọ, ụdị mkpụmkpụ nke ala oghere oghere, bụ ụdị mkpanaka mpụta dị larịị.A na-eji ya eme ihe na mkpọpu mmiri rotary nke nwere gas na mmiri mmiri.Isi ihe ndị mejupụtara ya gụnyere ọkpọkọ (mmara) ahụ na nkwonkwo.
A na-arụpụta ọkpọkọ mgbada oghere anyị dabere na ụkpụrụ API.Ma dị ka ihe ụfọdụ a chọrọ, anyị na-enyekwa ụdị ọkpọkọ DTH dị na nkọwa ndị China na America dị iche iche.
N'ihe banyere uru ya, ọ nwere njirimara nke nnukwu nkwụsi ike, ikike mkpuchi dị mma, nhazi elu dị larịị, na obere iyi na nguzogide mgbe ọ na-atụgharị.
N'ihe gbasara nkwakọ ngwaahịa, otu ngwugwu nke ọkpọkọ ọkpọkọ DTH ga-ejikọta ya site na otu ogwe igwe, na otu ngwugwu ga-enwe ọkpọkọ 30 ruo 40.
Nka nka nke DTH Drill Pipe (mkpọkụ ọkpọkọ ihe dị n'èzí):
| Dayameta | Ogologo | Ulo ala wrench | Eriri |
| 50-194 mm | 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 Ọ BỤRỤ | |||
| 3 1/2 "BECO 4 "BECO 4 1/2 "BECO | |||
| 5 1/4 "BECO |
