The purpose for the later is to improve the existing rotor screw drill for high efficiency. Subject heading: horizontal drilling screw drill tool control bending sub st...
研制后者的目的，在于改善现有中空转子螺杆钻具的软特性和低效率。
This company mainly produces various series of drilling screw with tapping screw dry wall screw fiber board screw self - tapping screw machine screw all kinds of non-standard goods.
公司主要生产各系列的自钻自攻螺钉、干壁钉、纤维板钉、自攻螺钉、机螺钉及各种非标准产品。
This company mainly produces various series of self-drilling screw with tapping screw, dry wall screw, fiber board screw, self-tapping screw, machine screw, all kinds of non-standard goods.
主要生产各系列的自鉆自攻螺钉、干壁钉、纤维板钉、自攻螺钉、机螺钉及各种非标准产品。
Drilling, it is necessary to advance 1.5 times the diameter of the screw, the screw too tight will cause stress.
有必要事前钻孔，1.5倍于螺钉的直径，而螺钉过紧会引起压力。
The other components of the case such as the rotating bezel also require a hand finish, particularly for drilling the screw thread and polishing.
表壳的其它部件，如旋转表圈等，同样须用人手处理，特别是钻螺丝内牙和抛光。
This well employed Measured While Drilling, geologic followup, screw drill direction technology and DF-1 multilateral well completion technology.
该井采用了地质跟踪、无线随钻测量技术、螺杆钻具定向技术与DF - 1多分支井完井技术等。
In China, the screw drilling and the normal pressure compressed air drilling were conducted for trial and the results were not so good.
国内进行了螺旋钻进和常风压空气钻进的尝试，但效果一般。
The working principle and application of a hydraulic testing platform for screw drilling tools are introduced.
介绍了一种螺杆钻具液马达试验架的工作原理及实际使用情况。
In order to ensure the efficiency and service life of screw drilling tools, an inverse inspection method for screw drilling tools driven by hydraulic motor is investigated.
为了确保螺杆钻具的效率和使用寿命，研究了采用液马达驱动的螺杆钻具逆向检测试验法。
The invention provides a screw drill with a skeleton-type stator, belonging to the field of drilling tools.
本发明提出一种带有骨架式定子的螺杆钻具，属于钻井工具领域。
The invention relates to a screw rod drilling tool used for petroleum drilling, and particularly relates to the technical field of petroleum drilling equipment.
本发明涉及一种用于石油钻井的螺杆钻具，具体涉及石油钻探设备技术领域。
With this improvement, it can add the function of screw tapping to the general drill-press by not changing its function of drilling.
在不改变台钻钻孔功能的同时，增加了攻丝的功能。
During drilling process, screw drill motor sometimes doesn't work properly or even seriously damaged because of sand jamming.
在钻井施工作业中，螺杆钻具常因砂卡导致螺杆马达工作失效，导致螺杆钻具报废，严重影响了正常钻井作业。
A section bar of a self tapping screw for saving drilling hole is provided with high-tightening force, which belongs to the design preparation technical field of the section bar.
可免钻孔上自攻螺丝并具有高紧固力的型材，属型材的设计制造技术领域。
The main points and difficult points in the drilling machining of balance tube for screw panel in the drilling and the method of solving these problems are introduced in this article.
超临界锅炉水冷壁螺旋管屏的平衡管管孔加工难点和要点，以及解决的工艺措施。
"Clamp Type" knee switch which don't need to cut the table, drilling hole, install by screw. It's easy to fix them up.
“卡钳式”膝动开关，无须切割桌板、钻孔、装订螺丝，安装容易、简便。
"Clamp Type" knee switch which don't need to cut the table, drilling hole, install by screw. It's easy to fix them up.
“卡钳式”膝动开关，无须切割桌板、钻孔、装订螺丝，安装容易、简便。
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