The difference of well control between UBD and conventional drilling;
欠平衡钻井井控与常规钻井井控差异及施工原则；
Air drilling is one of the effective means to increase drilling ROP, able to reach an ROP several times that of a conventional drilling.
采用空气钻井技术提高钻井机械钻速非常有效，钻速是常规钻井机械的数倍。
The rate of penetration of the negative pulse jet assisted drilling can increase from 0.7 to 3.0 in in-house simulation drilling compared to conventional drilling.
与常规钻井相比，室内模拟钻井试验条件下负压脉冲射流辅助钻井可以使钻速提高0.7-3.0倍。
Using conventional drilling methods, it will take three summer seasons in the remote reaches of Antarctica to get to the million-year-old ice that the teams hope lies 3000 metres down.
用传统的钻冰方式，将会花掉三个暑天来获取遥远南极的冰芯，它们预期位于地下3000米深的冰层里。
Oil-services firms there pioneered the technique of horizontal drilling, which is used to extract shale gas from America’s vast fields (conventional oil and gas are extracted using vertical wells).
美国的油田服务公司是水平钻孔技术的先驱，水平钻孔技术用来从美国的大型油田中提炼页岩气（通常石油和天燃气通过直井提炼而出）。
Applications: Conventional machines, boring machines, milling machines, tapping machines, special production transfer machines, drilling and punching machines, machining centers.
应用：常规机械、镗床、铣床、攻丝机、特殊产品转移机械、钻孔和冲孔机、加工中心。
The practice proves that comparing with conventional excavation technique, non -excavating horizontal directional drilling technique is obviously advantageous.
实践证明，非开挖水平定向钻进技术相对传统的开挖技术在特定条件下具有明显的优越性。
It is very difficult to develop the deep thin reservoirs using the conventional horizontal drilling technology.
利用常规水平井技术开发深部薄油层有较高的技术难度。
Air drilling is a kind of under-balanced drilling technology with air, whose rock breaking form is different from conventional mud drilling.
空气钻井技术是以空气作为循环介质的欠平衡钻井技术，其钻头的破岩形式与常规泥浆钻井有很大的区别。
Conventional double tube bits should be used as bits for drilling, while coring tool is double tube.
当取心钻具采用双层管时，钻进所用的钻头就需要用普通双管钻头。
Technics of LTCC MLB processing using thin film circuit technology, ink-jet printing, laser drilling, and conventional manufacturing methods is introduced.
概述了综合运用薄膜线路技术、喷墨打印技术和激光钻孔技术以及采用常规技术制作LTCC基板的简要工艺。
This article introduced the research and application of leak resistance and sealing technology while drilling at home and abroad, and conventional method of dealing with lost circulation.
文章介绍了目前国内外随钻防漏堵漏技术的研究与应用现状及常规处理井漏的方法，针对渗透性漏失及裂缝性漏失地层特点，首次提出了基于物理法随钻防漏堵漏技术。
The two technical problems faced by the technology of under-balanced horizontal well drilling with gas injection are the down-hole motor and the conventional MWD can't work normally.
注气欠平衡钻水平井技术面临的两大技术难题是井下动力钻具不能正常工作和常规MWD无法正常工作。
It is a big change to conventional way of drilling mud circulation.
是常规钻井泥浆循环方式的重大变革。
CBHP, PMCD and DGD all use the closed-loop system specifically for drilling purposes and usually only when conventional methods are not applicable for technical or economic reasons.
PMCD和DGD均采用针对不同钻井目的的闭环系统，通常用于因技术或经济原因而导致常规方法不适用时的情形。
This paper gives the necessity of using steering drilling tool in directional well drilling in Jidong Oilfield through the analysis of the limits in using conventional BHA.
通过分析定向井使用常规钻具组合的局限性，提出在冀东油田定向钻井中引入导向钻具的必要性。
The bit pressure of the BHA can increase more than 50% and the penetration rate can increase 120% comparing with the adjacent Wells using conventional pendulum drilling assembly.
与邻井常规钟摆钻具组合相比，这种钻具组合的钻压提高50%以上，机械钻速则提高120%。
This is a reversal thinking operation concept against the pipe drilling method of casing pipe wall protection described in conventional books.
本方法与书本上所述的套管护壁跟管钻进方法有反向思维操作概念。
When cheap, conventional, DIY type drilling machine saturated at every factory, people start looking for low cost production type drilling machine or tapping machine for its accuracy and durability.
当实惠常见的DIY型钻孔机在每个工厂都到处可见时，人们开始寻求用低成本来生产即精确又耐用的钻孔和攻丝机的途径。
The multi-process no-circulation foundation drilling techniques is highly adaptable to various formations, and drills faster than the conventional methods by 2 to 4 times.
多工艺旋挖钻进技术工艺适应地层能力强，比传统的钻进工艺方法可以提高钻进速度24倍以上。
A drilling technique whereby gases (typically compressed air or nitrogen) are used to cool the drill bit and lift cuttings out of the wellbore, instead of the more conventional use of liquids.
空气钻井是一种钻井工艺，是指利用气体去冷却钻头和把岩屑举升出油井环空，而不是利用更常使用的流体。
The medium viscosity is suitable for all conventional machinery, such as milling machine, drilling machine and lathes.
适当的黏度，适用于所有传统机床如铣床、钻床及车床等。
Residual stress distribution of FSW has high gradient, which makes the conventional strain gauge hole drilling method unsuitable.
应变片钻孔法是工程中应用最广的残余应力测量方法之一。
They are different from that of conventional rotary drilling equipment.
这些设备与常用的钻进法设备不同。
In the process of drilling, when the supercritical fluid emerged by conventional natural gas changes in phase transition, the well blowout will happen.
在钻井过程中，气侵的超临界流体在环空相态变化将可能引发钻井井喷。
In the process of drilling, when the supercritical fluid emerged by conventional natural gas changes in phase transition, the well blowout will happen.
在钻井过程中，气侵的超临界流体在环空相态变化将可能引发钻井井喷。
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