查询词典 drilling

The measurement of engineering parameters near the bit while drilling is of significant importance for the safety and efficiency in a drilling process.

钻井过程中，近钻头处钻压、扭矩等钻井工程参数的随钻准确测量对安全、高效钻井是十分重要的。

In the process of oil drilling, drillstring and rock bit are main drilling tools. The fact of their failure would cause serious downhole accidents.

在油气田钻井过程中，钻柱及钻头是主要的钻井工具，钻头及钻柱的失效将导致严重的井下事故。

It's an inevitable tendency to facilitate blast drill with intelligent control systems. Drilling mechanism of Rock Bit and main factors of influencing drilling effects are studied and analyzed synthetically in this thesis.

本文研究了牙轮钻头的破岩机理和影响牙轮穿孔效果的几个主要因素，对牙轮穿孔的几个参数进行了综合分析，同时指出了钻机本身的自动化水平和司机的操作水平也是影响牙轮钻机穿孔效果的一个重要因素。

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。

This paper introduced the structure and operating principle of pneumatic hammer,the selection of drilling parameter,the effect of field experiments and the existent problems. pneumatic hammer ; drilling technology,deviation prevention ; wiping

它兼容了气体钻井和冲击回转钻井的优势，其机械钻速一般比牙轮钻头回转钻井高，美国早在50年代3000~3500m深井中，成功地采用了空气锤钻井技术，而国内以前运用该技术于地质勘探、水文

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。

The down-the-hole hammer drilling is to use compressed air as circulation medium substituted conventional mud,has solved problems of coalfield sealed fire area exploration high temperature water burst in boreholes,burnt rock loosen and developed fissures,instable and easy to collapse,broke through low drilling efficiency in hard rocks.

潜孔锤钻进是以压缩空气代替传统的泥浆作为循环介质，解决了煤田火区勘察钻孔中高温水爆、烧变岩疏松裂隙发育、不稳定易坍塌的问题、突破了坚硬岩层硬钻探效率低的难题。

At the beginning, the common small diameter diamond coring drilling is used, but the efficiency is low, the cost is high, and the construction period is long. Subsequently, the hollow-through type DTH hammer drilling technique and continuous coring technology with reverse circulation are adopted to experiment in this mine.

中文摘要：新疆白干湖钨锡矿区自然环境恶劣，地质条件复杂，普通小口径金刚石岩心钻探方法效率低、成本高、施工周期长，后采用贯通式潜孔锤反循环连续取心钻进技术在本矿区进行生产试验。

DTH hammer ; pilot drilling ; hole deviation rate ; horizontal drilling hole

吉林大学；田野潜孔锤；导直钻进；孔斜率；水平钻孔

Drill holes in the drilling carried out, extending, hinge, screw attack when processing fixture as used in drilling jig, also known as Jig.

在钻床上进行孔的钻，扩，铰，攻螺纹加工时所用的夹具称为钻床夹具，又称钻模。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。