The ụlọ ọrụ na-tumadi aku downhole ngwaọrụ, mkpọpu ala rig ngwa, oilfield apịtị ihe na chemical ihe nhazi na ọkọnọ. The ụlọ ọrụ na-akwado mkpebi ọtụtụ nnukwu mmepụta emmepe na akụrụngwa bases na China na-amalite ngwa ngwa na ubi nke mmanụ ala ígwè ụlọ ọrụ. Ọ nwere ọgaranya ahụmahụ na nnyocha na mmepe, mmepụta na ime ihe nke mmanụ egwu ngwá ọrụ, na-enye ngwaahịa ọtụtụ mmanụ na gas ubi ngwá ọrụ ụlọ ọrụ n'ụlọ na mba ọzọ.