表皮系数,skin factor
1)skin factor表皮系数
1.A new model of skin factor and productivity ratio evaluation for horizontal wells with various completion systems不同完井方式水平井表皮系数及产能评价新方法
2.Application of skin factor in the deliverability testing of horizontal wells in gas reservoir气藏水平井产能试井中表皮系数的应用
3.In traditional real-time monitoring, wellhead pressure and acid injection volume are used to estimate changes of the skin factor during the acidizing process.传统的实时监测技术都是利用测量的井口压力和注酸排量来估算酸化过程中表皮系数的变化,达到实时判断酸化效果的目的。
英文短句/例句

1.A Study on Negative Skin Factor in Oilfield Development前期项目中表皮系数负值的问题研究
2.A Discussion on Decomposition of High Skin Factor in High Gas Rate and High Pressure Wells and Its Application高压高产气井高表皮系数分解方法探讨与应用
3.Application of skin factor in the deliverability testing of horizontal wells in gas reservoir气藏水平井产能试井中表皮系数的应用
4.A new model of skin factor and productivity ratio evaluation for horizontal wells with various completion systems不同完井方式水平井表皮系数及产能评价新方法
5.Investigated the apparent oil/ water partition coefficient( P) of free quercetin and quercetin in phospholipid complex in different pH waters and n-octyl alcohol.对槲皮素与磷脂形成复合物前后的表观油/分配系数进行了研究。
6.Pearson's coefficient of meansquare contingency皮尔逊均方列联系数
7.Pearson product moment correlation coefficient皮尔逊积差相关系数
8.Spearman rank correlation coefficient斯皮尔曼等级相关系数
9.The Relationships between the Expressions of Vascular Endothelial Growth Factor (VEGF), Basic Fibroblast Growth Factor (bFGF) and Microvessel Count (MVC) in Gallbladder Carcinomas;胆囊癌血管内皮生长因子、碱性成纤维细胞生长因子的表达与微血管计数的关系
10.Friction index: close to galvanized iron duct.沿程摩阻系数:沿程摩阻系数接近镀锌铁皮风管。
11.Climate-Adaptive Facades: A Research on Multi-Skin Facade System Suitable for HSCW Regions;气候适应性的建筑表皮:夏热冬冷地区多层表皮建筑立面系统研究
12.Synthesis and Characterization of the Controlled Release Membranes in a Transdermal Drug Delivery System;经皮给药系统中控释膜的制备和表征
13.The Relationship between BZAP45 and Mucoepidermoid CarcinomaBZAP45基因与黏液表皮样癌关系的研究
14.Abnormal Expression of Endothelin Receptor and Diseases内皮素受体的异常表达与疾病的关系
15.Research on Cutting Control Technique of Numerical Control Leather Cutting System;皮革数控裁剪系统裁剪控制技术研究
16.Cleansing of skin surface reduces number of resident bacteria. Soap can be irritating to skin.* 清洁皮肤表面减少居留细菌数量。肥皂可能刺激皮肤。
17.A chart representing numerical relationships.计算图表代表数字关系的图表
18.Of a fixed radix numeration system, having a radix of ten.以10为基数的固定基数记数表示系统。
相关短句/例句

skin coefficient表皮系数
1.However, produced by non-stabilized well test, the overall skin coefficient is not only affected by damage to near-well bore reservoir by drilling/completion fluid, but also affected by completion degree of wells and other stimulation measures, so it should not be used to e-valuate a procedure of a well's construction work.近井地带的表皮系数是评价油气井产能和完井效率的重要参数。
2.The biggest effectiveness is to adjust the hydraulic fracture after goals optimum and decided by skin coefficient,wells position and so on.最大有效性是在对目标优化选择后采用水力压裂,它是由工作井段的最大表皮系数、地层供给压力系统的有效性、井的相互位置等来确定的。
3)changing-skin变表皮系数
1.The use of changing-skin factors on gas well-testing interpreting;变表皮系数在气井试井解释中的应用
4)true-skin真表皮系数
5)negative skin coefficient负表皮系数
1.When well testing interpretation models applied to sandstone or carbonate reservoirs were solved, the instability of early phase data was caused by negative skin coefficient.无论是均质油藏还是碳酸盐岩油藏试井解释模型,求解时负表皮系数会引起早期数据的不稳定。
6)Total skin factor总表皮系数
延伸阅读

阀门技术注重流量系数和气蚀系数阀门的流量系数和气蚀系数是阀的重要参数,这在先进工业国家生产的阀门资料中一般均能提供。我国生产的阀门基本上没有这方面资料,因为取得这方面的资料需要做实验才能提出,这是我国和世界先进水平的阀门差距的重要表现之一。3.1、阀门的流量系数
阀门的流量系数是衡量阀门流通能力的指标,流量系数值越大,说明流体流过阀门时的压力损失越小。
按KV值计算式
式中:KV—流量系数
Q—体积流量m3/h
ΔP—阀门的压力损失bar
P—流体密度kg/m3
3.2、阀门的气蚀系数
用气蚀系数δ值,来选定用作控制流量时,选择什么样的阀门结构型式。
式中:H1—阀后(出口)压
H2—大气压与其温度相对应的饱和蒸气压力之差m
ΔP—阀门前后的压差m
各种阀门由于构造不同,因此,允许的气蚀系数δ也不同。如图所示。如计算的气蚀系数大于容许气蚀系数,则说明可用,不会发生气蚀。如蝶阀容许气蚀系数为2.5,则:
如δ>2.5,则不会发生气蚀。
当2.5>δ>1.5时,会发生轻微气蚀。
δ<1.5时,产生振动。
δ<0.5的情况继续使用时,则会损伤阀门和下游配管。
阀门的基本特性曲线和操作特性曲线,对阀门在什么时候发生气蚀是看不出来的,更指不出来在那个点上达到操作极限。通过上述计算则一目了然。所以产生气蚀,是因为液体加速流动过程中通过一段渐缩断面时,部分液体气化,产生的气泡随后在阀后开阔断面炸裂,其表现有三:
(1)发生噪声
(2)振动(严重时可造成基础和相关构筑物的破坏,产生疲劳断裂)
(3)对材料的破坏(对阀体和管道产生侵蚀)
再从上述计算中,不难看出产生气蚀和阀后压强H1有极大关系,加大H1显然会使情况改变,改善方法:
a.把阀门安装在管道较低点。
b.在阀门后管道上装孔板增加阻力。
c.阀门出口开放,直接蓄水池,使气泡炸裂的空间增大,气蚀减小。
综合上述四个方面的分析、探讨,归纳起来对闸阀、蝶阀主要特点和参数列表便于选用。两个重要参数在阀门运用中 。