共查询到20条相似文献，搜索用时 656 毫秒
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近几年来,在硬、脆、碎地层中广泛采用喷射式孔底反循环钻具(以下简称"喷反钻具")钻进,对提高工程质量、加快勘探速度起了一定作用.但长期以来,在使用中喷反粗径钻具的长度一般被局限在2～3米,因而不适应在完整地层(回次进尺长)钻进,束缚了这种钻具的应用范围.1972年内,我队对湖北地质局的喷反钻具进行了研究改制,分别在硬、脆、碎地层 相似文献
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海洋沉积地层多功能取样钻具研制 总被引：2，自引：0，他引：2
目前,海洋钻探取心主要采用提钻或绳索打捞的方式获取岩心。随着对取心质量和采取率要求越来越高,再加上海底沉积层变化多样,单一的取样器具已经不能满足当前的取样需要。为此,本文研制了一种海洋沉积地层多功能取样钻具,能够根据海底地层性质,开展低扰动、高品质的取样操作。通过海洋钻进取样试验表明,针对海底的淤泥、粘土及砂质地层,超前取样钻具、液压剪切取样钻具和半合管取样钻具能够有效获取海底的沉积层岩样,平均采取率为73.34%。研制的多功能取样钻具采用超前取样和液压压入取样技术,降低了对沉积物岩心的扰动,提升了岩心品质和采取率,为下一步的工程化应用奠定了基础。 相似文献
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共和干热岩资源富集于花岗岩地层,硬度高,研磨性强,部分层段裂隙发育,取心困难。针对干热岩地层和取心需求特点,研制一套KT178取心钻具,并配套设计了孕镶金刚石取心钻头。该钻具为单动双管取心钻具,可配套井底动力钻具使用,设计中注重对钻具外管、卡簧等关键部件的强度校核。在GH-01井和GH-02井中,经过两轮实验和优化,钻具逐渐成熟,获取了较完整的岩心样本,满足干热岩勘探取心要求,具备了向页岩气、水资源勘察等具有间断取心需求的同类工程推广应用的条件。 相似文献
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在易斜地层钻进时，带稳定器的钟摆防斜钻具组合的防斜效果往往不甚理想。通过计算和实践，发现“刚柔”钻具组合钟摆力强、防斜降斜效果好，而且可在常压下钻进，既保证了井身质量又提高了机械钻速。为大倾角硬地层易斜区防斜打快提供了一种新型的钻具组合类型。 相似文献
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超前侧喷绳索取心钻具的研制 总被引：2，自引：0，他引：2
[摘 要]针对破碎、软弱等复杂地层岩心采取率低的问题,本文通过无泵接手、岩心抓取机构和超前侧喷钻头的设计与结合,研制了一套超前侧喷绳索取心钻具;该钻具是一种基于普通绳索取心钻具及无泵反循环钻具设计的新型钻具,能实现孔内钻井液的局部反循环并改变孔底冲洗液流向,从而达到排粉及提高岩心采取率的目的;现场试验表明,超前侧喷绳索取心钻具能够实现破碎、软弱等难取心地层的正常钻进,试验孔段岩心采取率为94%,大幅度提高了岩（矿）心的采取率。 相似文献
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There was a famous saying by Sage Archimedes over 2,000 years ago that giving him a long enough lever and a fulcrum, he would tilt the entire earth. As an old driller, I propose another non‐famous saying that giving me a chance to drill a coring hole, and I will create a telescope to insert the deepest earth for you. Nowadays, drilling is one of most significant methods to collect samples from the deep earth. Those samples are extremely important for geoscientists to focus on the dynamic evolution of deep earth. Therefore, drilling engineering is thought to be inseparable for the geosciences. Unfortunately, some young geologists, especially students majoring on geology, have no meanings of what the drilling is, and of the importance for their geological researches. In this case, education popularization drilling knowledge should be strengthened in future. And we hope that sufficient attention of drilling engineering will be taken by geologists in the world. Moreover, in order to obtain high‐quality cores by various coring drilling methods. Drilling techniques and special coring tools must be continuously developed to successfully perform with regard to a variety of complex geological conditions. We have developed coring tools these years as follows: Splitted core barrel Triple tube coring drill tool, Advanced tube coring tool, Vacuum suction coring tool, Shock‐type coring tool, Long core barrel coring tool, WL‐drilling system with hydro‐hammer, WL‐drilling system with mud motor. These new coring tools have played a very important role in China's scientific drilling program. All in all, without advanced drilling technology, pickup of high quality samples from the deep Earth and geological research on the dynamic evolution will be restricted. 相似文献
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随着中深孔地质岩心钻探工作量的大幅增长,不仅对绳索取心钻柱提出了严格要求,对绳索取心钻具的功能和可靠性要求也越来越高。S75-SF绳索取心钻具采用了双弹卡结构,增强了悬挂机构的安全性,提高了内管总成的投放和打捞速度,减轻了孔内冲洗液压力波动,在正常钻进时可降低泥浆泵压力损失,有利于复杂地层孔壁稳定。内管总成机构与内岩心管采用插接的连接方式,拆卸方便,便于钻探施工人员采取岩心。该钻具在施工中效果良好,减轻了工人的劳动强度,提高了施工效率,可满足中深孔绳索取心钻探施工要求。 相似文献
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