共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
金刚石地质钻头的现状与发展 总被引:5,自引:1,他引:4
文章简要回顾了金刚石地质钻头的发展历程,介绍了近几年金刚石地质钻头的研究现状和发展趋势,文中的内容尽量反映同行们的科研成果与宝贵经验.文章所叙成果具有一定的理论指导意义和实用价值,期望能对我国地质钻头的发展和地质勘探工作起积极的促进作用. 相似文献
3.
热压金刚石地质钻头用石墨模具 总被引:2,自引:0,他引:2
近四十年来,我国热压金刚石地质钻头用石墨模具有了长足的进步,但是,与欧美日等发达国家的水平相比,尚有较大的差距。文章通过对国内外石墨模具样品的试验分析,并对碳素材料的氧化机理及其影响因素进行深入地研究,提出要提高热压金刚石地质钻头用石墨模具的尺寸精度、表面光洁度,减少胎体或镶块中金属结合剂的流失量,减缓石墨模具的氧化烧损速度,宜采用超细碳素原料颗粒来制作高电阻率、高石墨化程度、高强度、低灰分、微气孔率的石墨模具。这是赶超世界先进水平的发展方向,也是制取高精度,高使用寿命的热压金刚石地质钻头用石墨模具的有效途径。 相似文献
4.
在分析胎体磨损机理的基础上,自制了金刚石钻头和金刚石锯片胎体的耐磨性测试仪对金刚石钻头进行测试研究。介绍了该仪器的组成和工作原理及利用该仪器测试金刚石钻头的实验过程,分析了实验结果。实验结果表明,该仪器及测试方法具有较好的实用性和准确性。 相似文献
5.
6.
7.
8.
针对重庆涪陵页岩气层的钻探施工,优选最佳的钻头,通过合理使用,提高钻探施工的速度,达到预期的钻井施工的目的。由于井下时有复杂情况发生,因此必须结合页岩气层的地质状况,应用页岩气钻井的关键技术措施,不断降低页岩气钻井施工的成本,提高石油钻探施工的效率。 相似文献
9.
论述了环状钻齿在薄壁钻头焊接过程中的优越性和使用的安全性,比较了环齿钻齿与简齿钻齿的焊接费用和综合成本.提出了降低环状钻齿钻头综合成本的措施,认为在小直径(Φ<30)时环状钻齿钻头是较为经济的. 相似文献
10.
11.
分析了金刚石有序排列与激光焊接新工艺技术的特点,在此基础上,就其如何用于制造新型金刚石地质钻头做了具体的阐述。包括,调整产品结构尺寸、革新工艺流程,确定工艺参数(并列迷新旧工艺对比)以及使用性能考核,等等。研制实践及结果表明,采用新工艺技术,不仅提高了新型地质钻头的综合使用性能与生产效率,并可获得节能、省材与降低成本等综合技术经济效益。 相似文献
12.
13.
Lei Zheng Wendong Wei Yong Feng Xianglong Dong Chen Zhang Yong Zeng Haixiang Huan 《Ceramics International》2019,45(9):11905-11911
Thin-wall diamond trepanning bits are extensively used for processing hard and brittle materials such as engineering ceramics. However, it is difficult to achieve high-efficiency processing of engineering ceramics at a constant feed speed, because of high dynamic compressive strength, high hardness, and low density of engineering ceramics. In this study, a novel composite diamond bit combining sintering and brazing has been designed, along with the low-frequency axial vibration technology, to realize the continuous hole processing of engineering ceramics. Drilling experiments have been conducted on Al2O3 and SiC engineering ceramics with a constant feed speed. The variation of axial force, micromorphology of hole wall surface drilled, as well as the method of removing nesting during the drilling process were analyzed. According to the results, the novel composite diamond bit fabricated by combining sintering and brazing, can achieve the continuous hole processing of engineering ceramics at a constant feed speed, including Al2O3 and SiC. Compared to the conventional drilling (CD), the low-frequency axial vibration drilling (LFVD) can significantly reduce the axial force, and produce fewer plastic scratches on the hole wall surface drilled. In particular, the automatic blanking ratio approaches to 100% by LFVD, and only about 73.58% by CD. It can be concluded that LFVD technology can be used to realize continuous hole processing of engineering ceramics. The research results achieved in this study show that the drilling machinability of engineering ceramics by LFVD and novel composite diamond bit is good. Accordingly, this study provides a useful reference for continuous processing or batch production of engineering ceramics at a constant feed speed. 相似文献
14.
Sathyavageeswaran Sathish Sathiyamurthy Ramkumar Manivasagam Geetha 《International Journal of Applied Ceramic Technology》2019,16(1):357-366
This paper deals with the investigation on the microstructure and wear behavior of uncoated, Al2O3-13 wt% TiO2, and WC-12 wt% Co-coated drill bits intended for drilling reinforced concrete. Atmospheric plasma spraying technique was employed to fabricate the above coatings on high speed steel drill bits. The circularity measurements of the drilled holes were carried out using MATLAB. The holes drilled using WC-12 wt% Co-coated drill bit showed a better circularity depicting enhanced wear resistance as compared to that of the uncoated and Al2O3-13 wt% TiO2 drill bits. The improvement in the wear resistance of WC-12 wt% Co-coated drill bit is attributed to its higher hardness and lower porosity. Thrust force was observed to be lower for WC-12 wt% Co-coated drill bit depicting less amount of wear. This study suggests that WC-12 wt% Co-coated drill bits can be a potential candidate for drilling reinforced concrete. 相似文献
15.
16.
照南区块受山前逆推覆构造影响,钻井过程中地层均质性差存在大段砂砾岩,西山窑及其以下地层煤层发育,下侏罗统地层水敏性强微裂缝发育,全井地层倾角大、方位多变等钻井难点,通过应用优选个性化PDC钻头技术、煤层安全钻井技术、井壁稳定技术、井身质量控制技术,解决了该区块钻井难点,在实际施工中取得了良好的效果,达到了提高钻井速度的目的。 相似文献
17.
针对钻井液用O/W型石蜡乳液易破乳分层、析蜡结块的乳液稳定性难题,采用复配乳化剂将液体石蜡、植物油、白油组成的油脂相在一定条件下制备成有效成分含量达100%的石蜡乳油。为进一步提高石蜡乳油的润滑性,采用捏合干燥工艺对纳米二氧化硅微球表面进行预处理,并借助二氧化硅专用分散剂和稳定剂球磨分散到乳油体系中,经稳定性研究试验发现充分悬浮分散的纳米二氧化硅微球具有良好的热稳定性和机械稳定性。石蜡乳油相比于传统石蜡乳液具有更高的存储稳定性和使用便利性,可与水任意比例混溶形成O/W型石蜡乳液。性能试验表明:1%石蜡乳油加入淡水聚磺钻井液体系,API滤失量降低33.8%,润滑系数降低率28.6%,加入5%盐水聚磺钻井液体系,API滤失量降低26.7%,润滑系数降低率23.4%,石蜡乳油与聚磺钻井液体系配伍性良好,可完全替代传统石蜡乳液。该石蜡乳油在松辽盆地北8井进行了现场入井试验,试验井段井壁稳定、钻井液润滑性能提升明显,试验效果良好。 相似文献
18.
高温高密度水基钻井液体系流变性控制及机理研究 总被引:1,自引:0,他引:1
朱春玲 《精细与专用化学品》2010,18(1):24-26
高温高密度钻井液流变性调控是高密度钻井液工艺存在的首要问题,本文通过添加多种抗高温处理剂而复配成几种不同配方,从中选出一种配方作进一步的性能评价试验。考察了老化温度及固相含量对钻井液流变性能的影响,研究了水基钻井液高温作用机理。试验表明,高密度钻井液的流变性受固相含量大小和温度的影响明显,对于高密度钻井液体系,黏土侵污量应控制在4%,钻屑侵污量应控制在5%以内。 相似文献
19.
本文以某型号汽油机缸体为例,讲解了四面钻孔专机的设计过程及其在使用过程中的注意事项。这种将四个工序的加工内容集中到一台专用设备上加工的方案,是一种高效自动化机床的设计方案,为机械行业的专机设计人员们提供了一个新式的实例借鉴。 相似文献