Profile: Shanxi Yida Special Steel Group Co., Ltd. specializes in steel manufacturing and processing. We are an ISO 9001:2000 certified company. Our products include non-magnetic bars, bored bars, drill collars, flex drill collars, subs and drilling tools. Non magnetic bars are made by non-magnetic drill collar materials with low- strength that can be used for making non-magnetic drill collars. Non-magnetic drill collars are made from non-magnetic drill collar materials with low strength by combining a proprietary chemical analysis and a rotary hammer forging process with low magnetic permeability machine ability. Drill collars are available in lengths from 10 to 31 feet and outside diameter from 3 1/8 to 11 3/4. We make customized non magnetic flex drill collars. Integral blade stabilizers are available either as forged or machined blank bodies without spiraling or as finished machined including tungsten carbide hardfacing. Sleeve type stabilizers are also available with YDWC20-14 non-magnetic stainless steel sleeves. Sleeves are fully machined including tungsten carbide hardfacing. All our stabilizers are bore treated to impact a compressive stress layer on the ID providing unprecedented resistance to stress corrosion cracking.