Isu tinogadzira madhiramu epakati, ayo anoshandiswa kazhinji mukutsvagisa zvicherwa, uko coring ingangoita mazana akati wandei kusvika kuzviuru zvemamita pakureba.Kudhirowa kwedhaimani musimboti wekuchera kunoshandisa annular diamond-impregnated dhiri inonamirwa kumagumo ehollow rods kucheka cylindrical core yedombo rakasimba.Madhaimondi anoshandiswa akanaka kune microfine maindasitiri egiredhi madhaimondi.Iwo akaiswa mukati me matrix ekuoma kwakasiyana, kubva kundarira kusvika kune yakakwirira-giredhi simbi.Matrix kuoma, saizi yedhaimani uye dosing inogona kusiana zvichienderana nedombo rinofanira kutemwa.Makomba mukati mebhiti anobvumira mvura kuendeswa kune chiso chekucheka.Izvi zvinopa mabasa matatu akakosha: kuzora, kutonhodza, uye kubviswa kwezvibooreso zvekucheka kubva mugomba.Iwo epakati samples anodzoserwa uye anoongororwa neve geologists kune mamineral percentage uye stratigraphic contact points.Zvakare isu tinogadzira premuim yakamisikidzwa yedhaimondi core bits, non coring bits, mateko ekuchera, matanda ekuchera, overshots uye mamwe maturusi ekuchera madhaimani uye zvishongedzo zvekuongorora saiti, kuongorora zvicherwa uye kuchera matsime emvura.
