公司的无磁产品采用自主研发的低碳不锈钢制造而成。原材料经过严格的化学成份分析精炼锻造，具有超低磁导率、高强度的机械性能以及优异的耐晶间腐蚀开裂等特点。
        Special low-carbon stainless steel, developed by PDM independently, is adopted to manufacture the non-magnetic products. The raw material has the features of low magnetic conductivity, high intensity of mechanical character and excellent resistance of inter-granular stress corrosion cracking.
        公司可以依据API标准和石油行业标准，加工各种规格的无磁钻铤、无磁加重钻杆、无磁承压钻杆。也可以根据用户的个性化需求，设计、制造各种特殊用途的无磁钻具。
        PDM can manufacture all kinds of non-magnetic drill collars, non-magnetic HWDPs and non-magnetic high-pressure resistance drill pipes according to API specifications. PDM can also design and manufacture various of non-magnetic drilling tools for special use based on customer’s requirements.
 
        Content 1: Mechanical Properties for Non-Magnetic Drill Collars
        磁性能：Magnetic Properties:

1. 当磁场强度为1*1.05/4πNm时，无磁钻具铤的相对磁导率＜1.010;
2. 无磁钻铤沿内孔任意相距100mm的磁感强度梯度＜0.05WT.

 
        1. When the magnetic density is 1*1.05/4πNm, the relative permeability of non-magnetic drilling tool is below 1.010.
        2.  Along inner holes of the non-magnetic drilling tools, the magnetic density gradient is below 0.05WT on any 100mm distance.
        注：无磁钻铤规格型号等技术参数与普通钻铤相同。
        Note: The specifications of non-magnetic drill collars are the same as the slick ones.