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API 7-1 4145 & Non-mag Drill Collar
Drill Collar ikozwe muri AISI 4145H yahinduwe yazimye kandi ifite ubushyuhe kandi ikoreshwa nubushyuhe burebure bwose kugirango ikomere kandi irambe.Ibizamini bya metallurgiki birakorwa muburyo bwihariye kugirango harebwe niba ubushyuhe butanga umusaruro uhoraho kandi ntarengwa unyuze mu burebure bw'akabari.
Landrill itanga amakariso yimyitozo mubisanzwe kandi izunguruka kuva 3-1 / 8 "OD kugeza 14" OD ukurikije API, NS-1 cyangwa DS-1.
Icyumba 703 Inyubako B, Centre ya Greenland, Hi-tekinoroji yiterambere rya Xi'an, Ubushinwa
86-13609153141
