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1.Unwinding roller is made of stainless composite piping material, which has the following advantages:(smooth on surface, non-pilling, non-knotting, non-slip-stick, unity in unwinding expansion, good core-spunned result), roller seat, driven chain, traction changing gear, adjustable bearing godet wheel, driven cover.
退绕罗拉：采用不锈钢复合管材料制作，该种材料具有以下几种优点（表面光滑、卜挂丝、不缠丝、不打滑、退绕张力均匀、包芯效果好）、罗拉托座、传动链轮、牵伸变换齿轮、可调试轴承导丝轮、传动防护罩。收藏指正
2.The combination of fluidic coring tools and environmental protective drilling fluid system(Epm)increased the core recovery to more than 90 per cent from original 40 per cent by conventional technique, with the results of stable borehole wall during drilling process and smooth tripping.
射流式耽心钻具和环保型钻井液体系(EPM)两大成果的联合作用,使取心率从原来常规技术的40%提高到90%以上,而且钻进中孔壁稳定、起下钻顺畅。收藏指正
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