Ụlọ ọrụ API Bọọlụ ezé mmanụ na mkpọpu gas 14 3/4 ″ maka olulu mmiri miri emi

N'ogbe API oilfield tricone drill dị nro na ngwaahịa nwere ọnụ ahịa mbelata sitere na ụlọ ọrụ China
Mpempe mkpụgharị igwe maka igwu mmanụ
1.The akuakuzinwo bit nke na-eji maka oilwell bụ roba akara n'ibu Ọdịdị ma ọ bụ ígwè akara akara Ọdịdị Ọdịdị. Ebe a haziri rollers na grooves recessed na cone boy, na-abawanye nha nke ibu jounal.
2.Thrust na-ebu elu na-esi ike ma na-emeso ya na teknụzụ na-ebelata esemokwu.
3.Ball akpọchi cone, adabara elu rotary ọsọ.