查询词典 drilling

The new structure and the county, Hebei Province China Pile Driving Machinery Factory, factory has 30 years, the company developed and produced a series of Piling Machinery total of 10 series over 30 varieties, mainly KQ series of submersible Drilling Rig, KLB walker hydraulic auger drilling rig, DZB multi-rig, CFG series pile driver, car rigs, reverse circulation drill, spiral pile driver, hydraulic walking rig, gravel pumps, drilling and engineering products and related accessories (pipe, drill pipe, drill pipe, drill bit, seal apron);.

华构牌反循环钻机效率good，反循环钻机；河北省新河县华构桩工机械厂。河北省新和县华构桩工机械厂，建厂已有三十多年，公司研制生产的系列桩工机械共有10大系列30多个品种，主要有KQ系列潜水工程钻机、KLB液压步履式长螺旋钻机、DZB多功能钻机、CFG系列桩机、汽车钻机、反循环钻机、螺旋桩机、液压步履钻机、砂石泵、工程等产品及相关钻机配件（导管、钻机导管、钻杆、钻头、密封胶圈

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。

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。

Coal seam methane well ; drilling technology ; non-linear contact analysis ; Downhole Hammer Drilling ; rotary drilling

吉林大学；张龙飞煤层气井；钻井工艺；非线性接触分析；潜孔锤钻进；回转钻进

The shape of cuttings is related with the drilling parameters. The cuttings often appear in irregular flakes during air hammer drilling, and in spindle shape during cone bit drilling.

岩屑的形状与钻井参数有关，空气锤破碎岩石的岩屑形状呈不规则片状，牙轮钻头破碎岩石的岩屑形状呈纺锤形。

The local Directional drilling is just staring in terrane, the equipments and the technologies cant satisfy far and far the spot construction needs, according to current circumstance and considing the existed equipments, the author put forward drilling by air hammer in terrane , having designed compounded-drilling tools,and recommended technology parameters.producing experiments have obtained good achievements in economic and in techniques.

国内定向钻进铺管技术在岩层只是刚刚起步，设备、工艺远远不能满足现场施工需要，本文针对国内、外岩层定向钻进非开挖设备及工艺现状，结合国内大多施工单位的已有设备，提出岩层空气潜孔锤导向钻进工法，设计了适合岩层钻进的实用钻具，并提出具有针对性的工艺参数，生产性试验取得了良好的经济技术指标。

CNC CNC drilling and milling machine used in PCB drilling and milling industry, processing, testing and PCB jig mold precision drilling.

CNC数控钻铣机应用于线路板行业的钻铣加工、测试治具及线路板模具的精密钻孔。

The company has more than 2000 square meters factory area, more than 100 employees, main products have PCB Flying Probe Tester, PCB Milling Machine, PCB Drilling Machine tooling, jig machines, CNC drilling machine, engraving machine, engraving and milling machine, machining center , cell phone acrylic lenses machine, glass equipment, Extruder Dies CNC drilling machine, woodworking machine tools and so on, more than 500 users all over Guangdong, Zhejiang, Jiangsu, Shanghai, Shandong, Fujian, Guangxi, Beijing, Sichuan, Chongqing, Henan and other places, and exported to Southeast Asian countries.

公司拥有厂房面积2000多平方米，员工100余人，主要产品有PCB飞针测试机、PCB铣边机、PCB模具钻孔机、治具机、数控钻床、雕刻机、雕铣机、加工中心、手机压克力镜片机、玻璃专用设备、膨化机模具数控钻床、木工机床等，用户500多家，遍布广东、浙江、江苏、上海

It is connected to the required position of drilling stem to protect drilling stem without any influence on the drilling tool.

将它连接于所用钻柱的需要部位，保护钻柱，不影响钻具正常工作，一旦在井下工具遇卡可借助于安全接头卸开并退出卡点以上的钻柱，再次下钻时还可对接。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷