钻机

Into the fuel tank to the bottom of the shaft connecting the box with fixed nut to improve the reliability of the rig.

给进油缸下端与立轴箱连接处装有固定螺母，提高了钻机可靠性。

A drill consisting of a bit and a brace to hold and turn it.

有钻头和可以握住和旋转的手柄的钻机。

YG-30 construction drilling rig is used for drilling anchor holes in deep base pit of high building, anchor and reinforce side-slope for water conservatory project, water power station project, railways and highways .

yg - 30施工钻机是用于钻井锚孔在深基坑高层建筑，锚，并加强侧边坡水conservatory工程，水利电力站工程，铁路和高速公路。

YGQ-30 construction drilling rig is used for drilling anchor holes in deep base pit of high building, anchor and reinforce side-slope for water conservatory project, water power station project, railways and highways .

ygq - 30施工钻机是用于钻井锚孔在深基坑高层建筑，锚，并加强侧边坡水conservatory工程，水利电力站工程，铁路和高速公路。

7 Mm casing drilling technology in batch drilling on the Chenghai-1 platform in Dagang Oilfield was introduced in detail,including tools used in casing drilling,structures and principles of casing driver and the casing shoe,major equipment requirements of casing drilling,drilling process,and cementing techniques without drilling rig.

mm套管钻井技术在大港油田埕海一号平台批钻井中的应用情况，包括套管钻井使用的工具———套管钻井驱动器和套管钻鞋的结构和工作原理；套管钻井的主要设备要求、工艺流程以及无钻机固井工艺。

7 Mm casing drilling technology in batch drilling on the Chenghai-1 platform in Dagang Oilfield was introduced in detail,including tools used in casing drilling,structures and principles of casing driver and the casing shoe,major equipment requirements of casing drilling,drilling process,and cementing techniques without drilling rig.

简要介绍了套管钻井技术的工艺特点及国内外研究现状，详细介绍了φ339.7 mm套管钻井技术在大港油田埕海一号平台批钻井中的应用情况，包括套管钻井使用的工具———套管钻井驱动器和套管钻鞋的结构和工作原理；套管钻井的主要设备要求、工艺流程以及无钻机固井工艺。

Hydro-pneumatic suspension ; Mathematical model ; Nonlinear ; Computer simulation ; Stiffness ; Damping ; drilling machine ; fractal dimension ; fractal model

吉林大学；王智明油气悬挂；数学模型；非线性；计算机仿真；刚度；阻尼；钻机；分形维数；分形模型

One of the rig crew members who gets his name from the fact that he works on a platform attached to the derrick or mast, typically 85 ft [26 m] above the rig floor, during trips.

钻井队的成员之一，井架工名字的由来起源于起下钻时他工作在与井架或桅式井架连接在一起的一般距离钻机平台有85英尺高的平台上。

To meet the requirement of small diameter and shallow hole drilling for gas drainage in coal tunnel, the ZDY1200L track-mounted hydraulic tunnel drilling rig has been developed.

为适应当前煤矿井下小直径浅孔瓦斯抽放钻进的需要，研制了ZDY1200L型履带式全液压坑道钻机。

With the increase of borehole depth, the comparative advantage of hydraulic top-drive core drill decreases. In this case, the length of drill rod stand should be increased to improve efficiency of round-trip operation.

钻孔深度加大后，动力头钻机在钻进施工效率方面的对比优势会逐渐减弱，应该考虑采取加大钻杆立根长度，从而加大起下钻速度的措施。

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。