查询词典 drilling stem

ABSTRACT Drilling time will be lasted and lateral force on casing exerted by drill pipe will increase in case of drilling deep well, ultradeep well, high inclined hole, extended reach well and horizontal well, therefore, friction and wear between casing and drill pipe became a severe problem.

在深井、超深井、大斜度井、大位移井及水平井中，钻井时间延长、钻柱作用在套管上的侧向力增高，因此套管和钻柱的摩擦与磨损问题越来越突出。

Drilling time will be lasted and lateral force on casing exerted by drill pipe will increase in case of drilling deep well, ultradeep well, high inclined hole, extended reach well and horizontal well, therefore, friction and wear between casing and drill pipe became a severe problem.

钻杆接头与套管摩擦磨损问题的理论与试验研究套管磨损

Based on the theory study, a directional drilling guidance system is developed for practical require, its working flow as follows: before construction, design the best track practically, and save in the system. During drilling, the system measures well oblique angle and azimuth to watch well track. Drill driver compares designing well track with measuring track showing on display unit, controls joy stick experientially, adjusts drill direction, finally realizes directional drill.

在理论研究的基础上，结合实际需要，研究设计了一种定向钻井导航系统，使用该系统进行定向穿越施工的工作过程如下：在施工前，根据实际情况，先设计一条最佳穿越路线，存入系统；在钻进中，系统通过对井轨的井斜、方位等参数的测量，对其进行实时监测；地面的司钻手通过对显示仪所显示的实际井轨参数及设计井轨参数进行比较，根据经验操纵操作杆，调整钻机前进方向，以达到对钻进过程的控制，最终实现定向钻井。

I produced the whole grinding high speed steel straight shank twist drill drill head copper series, drill steel series, drilling stainless steel series, parabolic drill (deep-hole drilling) series, carbide straight shank twist drill , high-speed steel red needles (red steel series, aluminum series red, red stainless steel series), round tools, kinds of non-standard, complex tools, cutting tools.

我公司生产全磨制高速钢直柄麻花钻头，硬质合金直柄麻花钻，高速钢冲针(冲钢系列，冲铝系列，冲不锈钢系列)，圆车刀，各种非标，复杂刀具，刃具。

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。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。