Ụlọ ọrụ ahụ nwere nkà na ụzụ nhazi nhazi mmanụ casing mmanụ na ike mmepụta ngwaahịa ọhụrụ;nwere nnukwu ndị ọkachamara na ndị ọrụ nka na ndị ọrụ nwere nkà;nwere ọkaibe mmepụta na nhazi akụrụngwa, nyocha ngwa na ngwá ọrụ, yana akụ nke mmanụ-kpọmkwem tubing (OCTG) ngwaahịa ahụmahụ Threading.