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Kelly
GOI provides a variety of Kelly available up to 46 feet in length. Each Kelly is forged from 4145H tempered alloy steel ranging in hardness from 285BHN to 341BHN and a minimum impact value of 40 ft-lbs one inch below the surface. Each Kelly is designed and manufactured to API standard.
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Note: Above parameters are for reference only, actual configuration might be adjusted for different purpose or per customer requirement.