大直径硬岩环状取芯钻具的试验研究     

吴银柱  杨国春  王文臣 《地质与勘探》2006,42(6):90-93

在分析了国内外大直径基岩孔钻进取芯方法的基础上,提出了一套低能耗、高效率、低造价的大直径硬岩环状取芯钻具,设计制作了样机,并进行了样机试验.试验结果表明:该设计方案、工艺可行,达到了预期设计目标,为大直径硬岩取芯施工提供了一种新的机具.  相似文献   

CL植物胶复合无固相冲洗液在复杂地层绳索取心钻进中的应用与研究     

唐进军  黄贡生 《探矿工程》2007,34(11):25-29

为满足复杂地层绳索取心钻探技术的需要,寻找、配制了既能代替泥浆具有良好的护壁堵漏性能,又能满足绳索取心钻进技术要求的CL植物胶复合无固相冲洗液。详细介绍了CL植物胶复合无固相冲洗液的配方和配制工艺、性能指标测试与评价、护壁机理认识及应用效果。  相似文献   

贵州保田-青山煤层气参数井钻井工艺技术          下载免费PDF全文

邓昌文  莫日和 《探矿工程》2007,34(1):53-54

以贵州保田-青山煤层气参数井工程为实例，介绍了绳索取心工艺在该区的应用情况，并针对地层复杂、孔壁不稳定、粉煤取心困难等工程难点，提出相应的工艺技术。  相似文献   

煤层气井绳索取心钻进技术的改进     

王英刘炳志  王永丰 《中国煤田地质》2007,19(A01):1-2,4

通过大口径绳索取心技术在某煤层气参数井＋生产井施工过程中的应用，介绍了在应用该技术的过程中所遇到的技术难题及解决方案，同时介绍了煤层气参数井绳索取心过程中钻井冲洗液的选用及钻进参数的优选方法。  相似文献   

聚晶金刚石取心钻头的研究与应用     

王永丰  孙文洁 《中国煤田地质》2007,19(A01):3-4

煤田勘探中存在大硬度、弱研磨性、高胶结强度地层的低钻效问题，为此进行了聚晶金刚石取心钻头的研制。该聚晶钻头底唇设计为阶梯状，水口不超过8个，聚晶在底唇上采用抛物线布局。聚品金刚石取心钻头经与PDC钻头、金刚石钻头对比，其在大部分地层磨损正常，钻效有较大提高。  相似文献   

LBM钻井液在绳索取心钻进中的应用     

齐路恒李春杰  李晋河袁东翔 《中国煤田地质》2007,19(A01):27-28

LBM钻井液是一种低粘度低失水量的高效造浆材料，通过在绳索取心中应用，证明了LBM钻井液具有良好的抑制水敏性地层膨胀与分散的能力．可有效防止粘附卡钻事故及解决钻杆内壁结垢问题．是绳索取心钻进较理想的钻井液材料。  相似文献   

粉末冶金在探矿工程中的应用   总被引：1，自引：1，他引：0       下载免费PDF全文

丁华东  马明亮  杨晓华  浩宏奇  金志浩 《探矿工程》1998,(1):43-45

介绍了粉末冶金技术及产品在探矿工程中的应用,回顾了硬质合金钻进的历史;讨论了粉末冶金技术在金刚石钻头制造中的应用,尤其是近几年的进展,综述了钎头用硬质合材料新发展－梯度硬质合金和铁镍代钴硬质合金。  相似文献   

金刚石钻头制造的新型模具材料及模具成型工艺   总被引：1，自引：0，他引：1       下载免费PDF全文

李子章  邵继武  石绍云 《探矿工程》1998,(6):39-40

针对无压浸渍法制造金刚石钻头存在模具费用高、模具加工周期长等缺点,研究了一种新型模具材料（陶瓷粉）取代石墨材料,并研究了一种全新的模具成型方法,简化了模具制造工序,降低了成本。  相似文献   

Mineralogical studies of pyropes in kimberlites from China     

董振信 《中国地球化学学报》1998,17(1):29-43

Based on the measurements of refractive index,specific gravity,unit cell parameter,and mineral chemistry and infrared absorption spectrum analyses of pyropes in kimberlites from China,systematic studies of the Physical properties and compositional variations of pyropes of different colors and diverse paragenetic types,within and between kimberlite provinces have been undertaken,The origin of pyropes in the Kimberlites and the depth of their formation have been discussed.Pyropes of the purple series are different from those of the orange series in physical and chemical properties,for exaple,pyropes of the puple series are higher in α0,RI,SG,Cr2O3,MgO,Cr/(Cr Al),Mg/(Mg Fe),and Mg/(Mg Ca),and lower in Al2O3,Fe2O3 FeO than those of the orange series.The classification of garnets in kimberlites from china by the Dawson and Stephens‘ method(1975) has been undertaken and clearly demonstrates that pyropes of diamond-rich kimberlites contain much more groups than those of diamond-poor,especially diamond-free kimberlites.The higher in α0,RI,SG,Cr2O(3.Cr/(Cr Al),knorringite and Cr-component the pyropes are ,the richer in diamond the kimberlites will be.The infrared absorption spectrum patterns of pyropes change with their chemical composition regularly,as reflected in the shape and position of infrared absorption peaks.Two absortpion bands at 862-901 cm^-1 will grade into degeneration from splitting and the absorption band positions of pyropes shift toward lower frequency with increasing Cr2O3 content and Cr/(Cr Al) ratio of pyropes,LREE contents of orange pyrope megacrysts are similar to those of porple pyrope macrocrysts,but the former is higher in HREE than the latter,showing their different chondrite-normalized patterns.The formation pressures of pyropes calculated by Cr-component,Ca-component,knorringite molecules of pyropes show that some pyropes of the purple series in diamondiferous kimberlites fall into the diamond stability field.but all pyropes of diamond-free kimberlites lie outside the diamond stability field.The megacrysts were formed through early crystallization of kimberlites magma at high pressure condition,the majority of the purple pyrope macrocrysts have been derived from disaggregated xenoliths but the minoirty of them appear to be fragments of the discrete megacryst pyropes,or phenocrysts.  相似文献   

钻石的肉眼鉴别     

常家康 《上海国土资源》1998,(2):9-17,28

根据钻石的光学性质、导热性、亲油疏水性、硬度与工艺钻点,以及钻石的某些表面与内部特征,利用10倍放大镜肉眼可以比较有效地鉴别钻石及其模仿品。  相似文献