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ROTARY KELLY
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| Model No. : | 2 1/2" TO 6" ,API SPEC.7 |
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Tianhe Oil Group Huifeng Petroleum Equipment Co., Ltd.
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Product description
TIANHE PROVDE INTEGRAL TYPE SQURE AND HEXGON KELLY . material is AISI 4145H. fully heat trated alloy steel with a brinell hardness at 285-341 and a charpy impact at 40ft=-lbs. made as per api 7-1 and NS-1 standard.
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