查询词典 gas-forming

To avoid lost circulation or wellbore instability when drilling fluid circulated downhole after gas drilling, or to shorten drilling cycle and reduce drilling costs, it is recognized that the cementing quality needs to be improved further. 18 dryhole cementing jobs have been tried in 339.7 mm and 244.5 mm holes in Sichuan and Chongqing oil or gas fields and a set of technology for dryhole cementing after gas drilling is developed, including wellbore preparation, casing running, incontinuous liquid slurry injection, etc.

为了避免气体钻井结束后替入钻井液可能引发的井漏、井眼不稳定等复杂情况，缩短钻井周期、降低钻井成本，进一步提高固井质量，在川渝地区探索实践了气体介质条件下339.7 mm表层套管和244.5 mm技术套管共18井次的干井筒固井作业，基本形成了一套气体钻井后干井筒（井眼内为纯气体时的井筒简称为干井筒）固井工艺技术方案与措施。

To avoid lost circulation or wellbore instability when drilling fluid circulated downhole after gas drilling, or to shorten drilling cycle and reduce drilling costs, it is recognized that the cementing quality needs to be improved further. 18 dry-hole cementing jobs have been tried in 339.7 mm and 244.5 mm holes in Sichuan and Chongqing oil or gas fields and a set of technology for dry-hole cementing after gas drilling is developed, including wellbore preparation, casing running, incontinuous liquid slurry injection, etc.

为了避免气体钻井结束后替入钻井液可能引发的井漏、井眼不稳定等复杂情况，缩短钻井周期、降低钻井成本，进一步提高固井质量，在川渝地区探索实践了气体介质条件下339.7mm表层套管和244.5mm技术套管共18井次的干井筒固井作业，基本形成了一套气体钻井后干井筒（井眼内为纯气体时的井筒简称为干井筒）固井工艺技术方案与措施。

Incurrent research, aiming at the rupture problem engendered in the shooting process of acertain 5.56mm automatic rifle, the strain and stress distributions on the cartridge caseunder the action of axial pull have been analyzed. Based on the theories of elastic-plasticmechanics and contact mechanics, a mathematic and physical model of the cartridge-caseand chamber system has been set up; and based on the platform of the general softwarepackage APDL of ANSYS for finite element analysis, a parameterized model of thecartridge-case and chamber system has also been established. The method for nonlinearFEA has been adopted to analyze the stress distribution on the entire cartridge-case andchamber system, and the method of contact element has been employed to investigate thecontact stress between the cartridge case and chamber, and then the influences of frictioncoefficient and locking space on the static and dynamic stress and strain response of thecartridge case and chamber to the action of power gas have also been discussed. On thebasis of a lot of numerical tests, a kind of element Plane13, which is concentrated incoupled computation of heat and construction, has been used finally to simulate thetransient response of the cartridge-case and chamber system to the power gas. Throughloading the temporary thermal characteristics of explosive gas in the procedure of emulate, the corresponding transient thermal stress distributed on the entire system under thecombined load of transient thermal stress and transient pressure has been obtained. Owingto these comprehensive considerations, the numerical results obtained in this paperrepresent the actual situations comparatively exactly.

本文针对某5.56mm自动步枪在工作中出现断壳的问题，分析了弹壳在轴向拉力作用下的应力应变；基于弹塑性力学及接触理论，建立了弹壳弹膛系统的数学、物理学模型，在通用有限元ANSYS软件的参数化建模工具APDL平台上，建立了弹壳弹膛系统的参数化模型；采用非线性有限元法计算了弹壳弹膛系统的整体应力，引入接触单元法分析弹壳和弹膛的接触压力，探讨了在不同的摩擦系数和不同的闭锁间隙对弹壳弹膛静、动态响应的影响；本文进行了大量的尝试，最后确定采用热、结构耦合单元Plane13，在计算中加载了火药气体的温度历程，成功的获得了弹壳弹膛系统在瞬态的热载荷和瞬态的压力载荷同时作用下弹壳弹膛系统的热应力数值解，考虑因素全面，比较真实的反映了弹壳弹膛系统在火药气体压力和热载荷下作用的情况。

The simulations also show that on gas displacement front , CO2 drive is gas expansion drive when CO2／N2 slug, intraformational heterogeneity is more important than gravity segregation for the gas flooding of low permeable oil reservoir .

此外，对于低渗油藏，气驱主要受层间非均质性的影响，重力超覆影响较小。

The gas water heater can fully combust by using helix rib type heat exchanger, hollow throat, means for saving gas, meshy combustion plate and hearth. It can save 60 percent of gas.

充分燃烧就是无害排放，大幅度节省燃气就是大幅度降低排放和户内氧耗，这也就同时从根本上解决了用户和厂家都一直不放心的安全问题。

This reservoir is a mesotype shallow full-contained gas field, which is formed by 5 gas stacked formations in vertical. The buried depth is from 900m to 1200m, average porosity is 11.83%, average effective permeability is 0.28 X 10~-3 u m2. So this reservoir belongs to low permeability gas reservoir.

该气藏是由5个气层纵向叠置而成的浅层中型整装气藏，埋深900-1200m，平均孔隙度11.83%，平均有效渗透率为0.28×10~(-3)平方微米，属于低渗透砂岩气藏。

Due to a series of large or oversize scale oolitic gas pools were found in Feixianguan Formation in NE Sichuan Basin, the gas exploration have a good prospect. The questions about origin and accumulation of the natural gas in oolitic reservoir have been one of the focus in the field of petroleum geology.

四川盆地东北部飞仙关组一系列大型、特大型鲕滩气藏的发现，显示出该区巨大的勘探潜力和良好的勘探前景，有关鲕滩天然气的成因、来源及成藏等问题，是当前油气地质学研究的热点之一。

The analysis of group component, stable carbon isotopic compositions and biomarker, and the geochemical characteristics of the oil and gas show that the oil comes from the Palaeogene and the oil reservoir is new bed-generating and old bed-storing; the gas comes from Carboniferous-Permian and the gas reservoir is old bed-generating and new bed-storing.

通过对油气族组成、稳定碳同位素组成及生物标志化合物进行油气地球化学研究，认为东濮凹陷三叠系砂岩裂缝性油藏原油来源于古近系，油藏类型为新生古储式；天然气来源于石炭-二叠系，气藏类型为古生新储式。

Combined with blast furnace gas pipeline network practice operation situation, the article establishes gas flow characteristics analysis model and double precision simple algorithm PISO model to solve gas pressure and velocity distribution in pipeline.

文章结合某高炉煤气管网的实际运行情况，建立气体流动特性分析模型，并通过双精度SIMPLE算法的PISO模型来求解管道内煤气的压力和流速分布。

Based on the background information on the part of the existing strategy adopted by the Beijing Gas Group, this paper conducts a detailed analysis of strategic issues of this group company by using such analytical tools as SWOT Matrix, Boston Matrix and Portor's Five Forces Model. The author discusses the status in quo of global gas market and domestic market, the internal environment of the group company, and the structure of gas industry. The major strategic problems of the group company are summarized on the basis of above-analysis, including the obsolete thoughts of decision makers, the weak management system of human resources, the deviation on building corporate culture, and the teetering on information processing.

论文在阐述燃气集团公司战略背景的基础上，采用SWOT矩阵、波士顿矩阵、波特竞争力模型等工具和方法，从燃气行业战略发展的角度出发，对全球燃气市场、国内燃气市场、燃气集团公司内部环境，以及产业结构进行分析，指出燃气集团公司目前在战略管理上存在的主要问题，如观念陈旧、人力资源开发和管理体系薄弱、企业文化建设的偏差、信息化进程缓慢等等。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。