查询词典 hammer-nose

This paper introduced a new type DTH hammer drilling with eccentric simultaneous casing about the structure composition and the design idea.

中文摘要：介绍了新型偏心跟管钻具的结构组成以及设计思路。

During air drilling,under the precondition of high drilling speed,pneumatic hammer drilling technology can validly control the well deflection.

在气体钻井中，空气锤钻井技术解决了不能在打快的前提下控制井斜的难题，是目前最可行最有效的技术。

However this way also has many problems, like drill set structures, drilling technology, which have effect on the DTH hammer drilling way.

但是，风动潜孔锤钻进方法在这些领域的应用，还存在这样或那样有关钻具结构、钻进工艺方面的问题，影响着风动潜孔锤钻进方法的应用和施工效果。

The paper introduced the structure and principle of DTH hammer drilling with concentric simultaneous casing,which used in seismic exploration drill in gravel.

介绍了适合卵砾石地层地震勘探孔施工用的潜孔锤同心跟管钻具的结构和工作原理。5 simultaneous casing

Of drilling equipment including: breaking hammer (new F series and in the Chinese market a good reputation 20G), HD700 series of open-air rig.

凿岩设备包括：破碎锤（新型的F系列及在中国市场上口碑良好的20G），HD700系列露天钻机。

During air drilling,under the precondition of high drilling speed,pneumatic hammer drilling technology can validly control the well deflection.

一、空气锤简介空气锤钻井是一种低钻压、低转速、高冲击破岩的回转钻井技术。

During air drilling,under the precondition of high drilling speed, pneumatic hammer drilling technology can validly control the well deflection.

空气锤钻井是一种低钻压、低转速、高冲击破岩回转钻进技术，它兼容了气体钻井和冲击回转钻井的优势，其机械钻速一般比回转钻井高，是当今解决硬岩钻井难题的一种有效方法。

Hole deviation ; control ; drilling tool ; air forging hammer ; air screw

井斜；控制；防斜钻具；空气锤；空气螺杆

Connecting with the practices of the shafting work in the water-source location of Sujigou, Zhungghar Banner, this paper expounds the technical details and drilling measures of the downhole hammer in the shafting process.

结合准格尔旗苏计沟水源地凿井工程的实践，阐述了潜孔锤凿井过程中的技术细节和钻进措施。

In order to analyzes the soil deformation mechanism under the impact load of the step-bit, the finite element model of impact and displacement drilling with down the hole hammer is established on the basis of adopting Drucker-Pager yield criterion, taking soil as DP materials and simulating the drilling process by applying the impact load on soils.

为了分析阶梯钻头冲击挤密作用下土体的变形机理，将土体视为DP材料，服从Drucker-Prager屈服准则，通过钻具与土体之间的接触以及施加冲击载荷来模拟钻进过程，建立了潜孔锤冲击挤密钻进的有限元模型。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。