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金刚石钻头的综合评价是一个多指标的决策问题。本文将多指标决策中的ＴＯＰＳＩＳ法应用于金刚石钻头的综合评价，并用实例与其他方法进行了对比，结果与实际相符。 相似文献
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去年六月在安徽屯溪举行的金刚石钻头设计加工调研会,对钻头的金刚石浓度问题提出了新的理论,引起了各方面的争论和重视。金刚石孕镶钻头传统浓度是75％或50％,甚至更低。特别对付打滑地层通常都采用低浓度,低硬度的办法。但在屯溪会上,长春地质学院的张祖培付教授及探矿工艺所的邵继武同志都提出了提高金刚石浓度的新论点。他们认为:当浓度在0—70％范围内,由于金刚石含量少,在钻进过程中容易破碎,钻头表现出较低的耐磨性,钻头寿命很低。当浓度在70—120％范围内时,钻头的耐磨性与浓度几乎是直线关系。因为随浓度的增 相似文献
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本文根据河南省小秦岭金矿田在钻探施工中，小口径金刚石钻头底唇胎体拉槽、推光头的现象和特征，全面地观察和剖析了发展规律及导致拉槽的过程，提出了独特的见解和认识，研究出了使用钻头的正确方法，拟供同类矿区借鉴 相似文献
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本文着重分析了两个相关的问题,其一是国内外人造金刚石钻头结构方面,关于金刚石质量,粒度、浓度、摆法、胎体性能等技术参数的选择问题,如何参照国外的参数值,合理地研究设计出适合我国的钻头结构。其二是,如何面对世界金刚石工业掀起“聚晶热”的挑战,使我国钻探切削具能够尽快步入以人造金刚石及其复合材料为主的新时期,并结合国外的使用实例,结合国内的试验情况,结合地矿部“七五”重点科研攻关项目——“人造金刚石复合材料及其钻头的开发”,研究出适用于我国的各种人造金刚石聚晶及其复合材料,以及新型超硬材料的开发应用问题。 相似文献
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为了更好地避免采取岩心的直径变大、孔径变小、新钻头下不到孔底和新钻头在下钻过程中卡钻等钻探安全质量事故的发生,减少钻探施工中新钻头初次下孔过程中扩孔的麻烦,通过长时间在钻探过程中的摸索与试验,我们总结提出了一套在钻探工作中比较实用的金刚石钻头“分组“与“排队“的方法。通过在钻探过程的实际运用,这套方法能有效地避免了前述钻探事故的发生,对提高钻探质量,保证钻探安全,减少单孔金刚石钻头的消耗量和提高钻探经济效益指标等都起到了良好的作用。 相似文献
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钴基胎体金刚石钻头具有性能好、价格高的特点,以 Ｆｅ代 Ｃｏ作为胎体材料是提高金刚石钻头性价比的主要方法之一。但是 Ｆｅ替代 Ｃｏ后存在金刚石热损伤严重、被包镶强度不足、胎体抗冲击和耐磨性差等问题,因此改善热压铁基金刚石钻头胎体力学性能对降低钻探成本、提高钻探效率具有重要研究意义。利用自行设计的磁处理设备对铁基热压金刚石钻头胎体进行磁化处理,通过正交试验等方法研究了磁感应强度、磁场频率和磁处理时间对胎体硬度、抗弯强度和耐磨性的影响及其规律。试 验 结果表明:试验胎体硬度最优磁处理参数为０．８Ｔ／８Ｈｚ／３ｍｉｎ,磁处理后胎体抗弯强度最高提升了１３．８％,耐磨性增加,特别是含金刚石的胎体磁处理后其磨损量可降低３８．１％。 相似文献
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为了解决青海东昆仑重点成矿带金刚石钻进中钻头使用寿命较短的问题,对该区域典型岩石的研磨性、可钻性进行了测试分析,并对影响钻头寿命的因素进行了现场调研。测试结果表明:岩石的研磨性主要在5~6级,可钻性为7~8级。回归统计分析表明,影响钻头寿命的显著因素是钻孔深度和钻头回转速度:钻孔越深,转速越高,钻头寿命越短;认为这是由于地层漏失,导致环空粗颗粒岩屑不断累积,造成钻头重复破碎岩屑、拉槽和微烧,从而降低了钻头的寿命。 相似文献
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我队于一九八一年八月在南丹芒场矿区开始使用武汉地质学院研究的电镀人造孕锒金刚石钻头,到八四年七月底止,共三年,计使用完各种电镀钻头344个,总进尺11521.55米,总纯钻时间6795:05小时(表1),平均钻头寿命33.49米/个。其中八一、八二年平均寿命为58.51米/个;平均时效1.70米/小时,每米钻头费用7.46元/米。其中1219号钻头进尺405.67米,纯钻时间109小时。过百米钻头29个,为钻头总数的8.2％,过50米(不含过百米钻头数)钻头43个,为钻头总数的12.5％。 相似文献
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REN Hong YIN Kun WANG Qing-yan HAO Shu-qing 《东北亚地学研究》2005,8(1):133-137
A set of experimental apparatus on reverse circulation bit are developed, in order to lucubrate the mechanism of the new type reverse circulation bits, and the structure of the bits influencing the ability of taking core and carrying powder. Both the major structure of the equipment and the procession of experiment are described. 相似文献
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A set of experimental apparatus on reverse circulation bit are developed, in order to lucubrate the mechanism of the new type reverse circulation bits, and the structure of the bits influencing the ability of taking core and carrying powder.Both the major structure of the equipment and the procession of experiment are described. 相似文献
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The lifetime of roll-bits with inserted tooth will be obviously decreased while drilling in strata and the tungsten carbide can be integrally separated from the roll-cone,which will need more trip out time to replace the roller bit.This study provides an entire analysis on stress as well as strength for teeth and tooth holes in loaded conditions.Qualities of tooth drop from matrix within roller bit.The optimized interferences of teeth inserted into the bit can be reasonably obtained by the critical interference derived from some relevant influence factors on the tooth-fixing quality of roller bits. 相似文献
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遥感影像融合算法,在增强多光谱影像空间分辨率的同时,可实现影像间的信息互补,提高遥感影像的解译能力。异源影像的融合受影像间配准精度及其在时相、空间分辨率和辐射分辨率之间差异的影响,而不同辐射分辨率对异源遥感影像融合所产生的影响及其纠正方法还缺乏深入的研究。为此,本文提出了异源影像融合的辐射分辨率规范化方法。该方法在统一像元值量化区间的基础上,将其乘以相同的比例系数转换到更高的辐射分辨率的量化区间,以减小融合过程由于数据位数取舍而引起的影像信息丢失。研究表明：本文所提出的辐射分辨率规范化方法的取整融合或以实数形式融合,其结果几乎没有差别;而其他转换方法的取整结果均较实型结果差。由于直接采用反射率值进行融合会使其结果产生严重的光谱失真,因此,应采用辐射分辨率规范化方法将反射率值进行转换后再做融合。 相似文献
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《世界地质(英文版)》2012,(3):241-244
Bionics was applied in the design of the impregnated diamond bit. Based on previous research and the 63# bit matrix formula, a new non-smooth bionic impregnated diamond bit with a single circular ring was designed and manufactured, and also tested indoor. The results were satisfactory. During its shape contacted surface system, non-smooth shape display some structure merits such as decreasing resistance. It was obvious that the drilling efficiency of the bionics bit is much higher than that of ordinary’s one, and so does the working life of bionic bit. 相似文献
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LUO Chunhong ZHENG Zhichuan CAO Pinlu College of Construction Engineering Jilin University Changchun China 《东北亚地学研究》2009,12(1):36-39
The authors tested the percussion-extruding Down-the-hole （DTH）hammer bit with five different structures and mainly analyzed the drilling mechanism between conical bit and stepped bit. In addition, aiming at ＂the pile effect＂ in combination with the advantage＇ of stepped bit, we design a new cam spinning bit and test it outdoors. The result shows that using cam spinning bit can solve the problem of ＂the pile effect＂, which can also obtain higher drilling efficiency than using conical bit in high confining pressure strata. It is characterized by novel structure and high drilling speed as well as good guiding, and it is significant for improving efficiency in percussion-extruding drilling technique. 相似文献
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The authors tested the percussion-extruding Down-the-hole(DTH)hammer bit with five different structures and mainly analyzed the drilling mechanism between conical bit and stepped bit. In addition, aiming at "the pile effect" in combination with the advantage of stepped bit, we design a new cam spinning bit and test it outdoors. The result shows that using cam spinning bit can solve the problem of "the pile effect", which can also obtain higher drilling efficiency than using conical bit in high confining pressure strata. It is characterized by novel structure and high drilling speed as well as good guiding, and it is significant for improving efficiency in percussion-extruding drilling technique. 相似文献
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Shuqing HAO Hongwei HUANG Kun YIN. Department of Geotechnical Engineering Tongji University Shanghai China. College of Construction Engineering Jilin University Changchun China 《东北亚地学研究》2007,10(2):190-195
By simplifying the characters in the air reverse circulation bit interior fluid field, the authors used air dynamics and fluid mechanics to calculate the air distribution in the bit and obtained an equation of flow distribution with a unique resolution. This study will provide help for making certain the bit parameters of the bit structure effectively and study the air reverse circulation bit interior fluid field character deeply. 相似文献
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By simplifying the characters in the air reverse circulation bit interior fluid field, the authors used air dynamics and fluid mechanics to calculate the air distribution in the bit and obtained an equation of flow distribution with a unique resolution. This study will provide help for making certain the bit parameters of the bit structure effectively and study the air reverse circulation bit interior fluid field character deeply. 相似文献
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Hong REN Kun YIN Kun BO College of Construction Engineering Jilin University Changchun China 《东北亚地学研究》2008,11(1):47-51
By field experiment in Sandaozhuang W-Mo mining area in Luanchuan of Henan Province, the authors analyzed the Experimental result of reverse circulation bit on the basis of different structures and obtained the following conclusion ： the design parameter of reverse circulation bit, the number, diameter and angle of the spurt hole can influence on the reverse circulation effect. The bit with inner spurt hole is better obviously than that one without inner spurt hole in reverse circulation, one or two right and the best choice of inner spurt hole is that the diameter is Φ8, the angle is 30° dip up and the suitable number is two to three. 相似文献