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API 7-1 4145 & Tsis-mag Drill dab tshos
Laum dab tshos yog tsim los ntawm AISI 4145H hloov kho quenched thiab tempered steel thiab yog tshav kub kho raws nws tag nrho ntev rau uniform toughness thiab durability.Kev ntsuam xyuas cov hlau nruj nruj yog ua raws li qhov tshwj xeeb los xyuas kom meej tias cov kev kho cua sov ua kom zoo ib yam thiab siab tshaj plaws hardness los ntawm qhov tob ntawm qhov bar.
Landrill muab cov laum dab tshos hauv tus qauv thiab spiraled los ntawm 3-1 / 8 "OD txog 14" OD raws li API, NS-1 lossis DS-1 specifications.
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