在这种情况下，用反循环会好些。
反循环提出多余的水泥浆。
钻机采用了冲击反循环方式，钻进效率高，适应地层面广。
The driller adopts the percussion and reverse circulation drilling pattern, with the higher drilling efficiency and wider formation suitability.
型管柱中的生产堵塞器具有单流阀作用，可方便进行反循环洗井；
The procreative blanking plug of the "Y type" pipe string has check valve function and it can conveniently for reverse circulation well cleanup.
本文介绍了所设计的反循环水龙头的结构组成及其现场使用情况。
The special reverse circulation swivel that matches with the improved shaft is developed. The construction and application of the swivel are introduced in this paper.
介绍了应用气举反循环钻进工艺解决这些疑难技术问题的成功案例。
The paper introduces the typical examples for resolving these problems by air-lift reverse circulation drilling technology.
中国成达化学工程公司反循环蒸发器发明专利已授权，并已工业化。
The invention patent for counter-circulating evaporator of Chengda Chemical Engineering Corporation is already authorized and commercialized.
文中首次提出适应小井眼的反循环并控方法并给出了相应的计算公式。
A re verse circulation well control method applicable in slim hole was advanced firstly and respective calculation equations were set up.
文中阐述了在金矿勘探中应用潜孔锤反循环连续取心（样）的优越性；
Some superiorities of using down hole hammer counter circulation type continuous coring (sampling) method in gold ore exploration are expounded in this paper.
根据钻探技术的历史经验，建议应进行大直径反循环回转钻进井底过程的研究。
Based on the historical experience of drilling technology, it is proposed to study the bottom process of large diameter reverse circulation rotary drilling.
通过采取反循环成桩工艺，可很好地解决这些问题，目前该工艺得到了广泛的推广。
While adopt the reverse circulation perfusion stake craftwork, can solve this problem, and this craftwork has been popularized broadly.
概述了空气反循环钻进工艺应用于物探爆破孔施工的原理、特点及其试验应用情况。
This paper describes the theory, features and testing results of the air reverse circulation drilling process used in geo physical blast hole drilling.
在浅海岸边进行钻机作业，由于海平面水位不稳定，采用6BS反循环泵已不合适。
Due to unstable sea level, drilling by using 6bs counter circulation pump is not very suitable.
针对露天矿钻探施工中存在的问题，提出了利用贯通式反循环潜孔锤进行施工的新方法。
According to the exploration problems in an open-pit mine, a new drilling method using reverse circulation DTH hammer drill is put forward.
运用气举反循环钻进，在满足一定条件下适当增加双壁钻具长度即可得到较大钻进孔深。
Apply air reverse circulation drilling, appropriate increase length of twofold wall drill tools under certain conditions, may be drilling much deeper.
介绍了使用泥浆护壁气举反循环回转钻进工艺进行襄樊汉江四桥大口径嵌岩桩的施工实践。
The paper introduced the use of airlifting reverse circulation rotary drilling techniques in practice of major diameter socket pile operation at Xiangfan city's Hanjiang No.
介绍了使用泥浆护壁气举反循环回转钻进工艺进行襄樊汉江四桥大口径嵌岩桩的施工实践。
The paper introduced the use of airlifting reverse circulation rotary drilling techniques in practice of major diameter socket pile operation at Xiangfan city's Hanjiang No. 4 bridge site.
泵吸反循环钻孔扩底灌注桩与人工挖孔灌注桩相比，地质条件的适应性强，施工安全可靠。
Compared to artificial digging-hole pile, the pumping reverse-circulation under-reamed bored pile has higher adaptability to geological condition, and its construction is safety and reliability.
本文着重阐述了气举反循环理论和机具制做方法，从而解决了在岩溶发育地区的施工技术难题。
The author has made an exposition of the theory of airlift reverse circulation machines and tools, and its making way as well, which has solved the construction technical difficulty.
最后，在分块反对称反循环矩阵性质的基础上，给出了其特征值和特征多项式以及相似对角阵。
Finally, based on these characteristics, the eigenvalues and eigenvalues polynomials and its diagonal matrix were given.
根据现有正反循环洗井转换操作中出现的问题，提出了正反循环洗井快速转换管汇的设计方案。
According to the problems of present direct flushing and indirect flushing transfer operation a design for rapid direct flushing and indirect flushing transfer manifold is pot forward.
介绍了泵吸反循环钻进的施工特点、适用范围、施工中的技术要求与常见故障的原因及处理方法。
The paper has introduced constructional properties, applicable sphere of pumping reverse circulation drilling, and its technical demands and the reasons of common hitchs and processing methods.
采用水泥承转器挤水泥技术能防止挤水泥浆倒流，且多余的水泥浆能从工具的上部反循环至地面。
Using cement retainer squeezing technology can prevent the cement backward flow, and CAM let the residual cement through the upper party to recycle to the ground.
本文特别研究设计了CBA型局部气举反循环钻具，对钻进所需的空气压力和压气量给出了计算公式。
Also a CBA local air reverse circulation tool is designed with the required air pressure and consumption calculation formula given.
最近，广西第一地质工程地质施工公司引进了冲击反循环钻进方法用于滑坡治理工作，取得重大突破。
Recently the Guangxi First Geological Engineering Construction Company introduces the percussive reverse drilling method, and has made a great breakthrough.
本文通过理论计算及实验，证实了使用现有设备，气举反循环可以更好的满足超千米深水井的施工要求。
Get through theory calculation and testing, it has proved that air reverse circulation can be satisfied constructional claims of over thousand meters deep water well, with existing equipments.
贯通式潜孔锤反循环钻进技术是一种先进的钻探方法，适用于复杂地层中的地质勘探以及各类钻孔工程。
The hollow-through DTH hammer drilling techniques with whole hole reverse circulation is adopted, it is proved that this technique can resolve drilling.
GFC-120型钻机为自走式动力头回转反循环钻机，用于降水井和护坡桩基础孔以及小型水井的施工。
Rig GFC-120 is a kind of self moving reverse circulation rotary rigs. It is mainly used to drill side foundation holes and small water wells.
本文给出了分块反循环矩阵的概念，讨论了含分块反循环矩阵的相似类，并且得知分块反循环矩阵一定与分块循环矩阵相。
In this paper, the concept of partition anti-circular matrix is introduced, and a similar system is discussed, which includes partition anti-circular matrices.
给出了分块对称反循环矩阵的概念，讨论了分块对称反循环矩阵的性质，给出了分块对称反循环矩阵的若干充分必要条件。
This paper gives the concept and some properties of partition symmetric anti-circulate matrix, and the sufficient and necessary condition is discussed.
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