Ọ na -eguzogide ọgwụ nzere na ndụ ogologo oge nke nwere ike ịkwalite arụmọrụ mkpọsa ma chekwaa ọnụ ahịa ya.
Ọ dabara adaba maka coring n'ụdị siri ike, dị ka aja.
Koodu ngwaahịa: DNC201
IADC: M712
Ịkụ ala n'etiti na usoro siri ike.
O kwesịrị ekwesị maka ịjikọta ya na usoro siri ike nwere ogo ụfọdụ nke abrasive.
Ọ dabara maka arụ ọrụ coring na ọkara na nhazi siri ike yana njiri mara ogologo ndụ.