It is difficult to inject steam into cold production wells because of casing deformation resulting from well cementation difference between cold production and thermal production. 常规完井与热采完井的固井有差异,在常规井上注汽,套管的受力变形比热采井复杂。
Steam turbine casing collision test is used to determine the minimum through-flow clearance between rotor and assembled casing parts. 汽轮机缸体碰撞试验用来确定汽轮机转子与已装配好的汽缸零件之间存在的最小通流间隙。
Back steam into the turbine and drain condensate from the casing. 蒸汽倒进汽轮机并从壳体排凝。
Based on the structural features of the HP casing, this paper analyzes the heat transfer of the steam flowing in the HP casing in operation, explains the reasons of the problem and presents countermeasures. 针对这种情况,根据其高压缸的结构特点,分析了高压缸运行时蒸汽流动的传热情况,并对这种高压缸温差过大的现象进行了解释,最后提出了相应的措施。
Non-API casing TP90H for steam injection well were designed and developed on the basis of realizing casing service environment. 在充分了解油田实际使用工况的基础上,成功设计开发出了一种注蒸汽稠油热采井专用的非API系列套管-TP90H。
The vibration of steam excitated usually happened on the unit which is high parameter, more stages, high speed and shafting stability not well, and usually happened on high pressing casing inner, especially happened on high pressure casing control stage. 汽流激振通常发生在高参数、级数多、高转速的轴系稳定性差的机组上,一般发生在高压缸内,尤以高压缸调节级处汽流激振最为严重。
Situation and Development of Steam Wetness Measurement in Turbine Exhaust Casing 汽轮机末级湿度测量方法研究现状及其发展
Design of physical model of wellbore heat transmission in steam injection well of nitrogen insulated casing annulus 注汽井油套管环空氮气隔热井筒传热物理模型设计
Influence Probe of Steam Rubbing in Turbine Casing to Moving and Static Equipment 汽缸内部摩擦鼓风损失对动静设备的影响探讨
Influence of steam injection technology string on casing failure in thermal recovery wells 注汽工艺管柱对热采井套损的影响
Development and Aerodynamic Design for Leaned and Twisted Cascade of Large Capacity Steam Turbine Low Pressure Casing 大功率汽轮机低压缸斜扭叶栅的开发与气动设计
Steam Turbine Low-Pressure Casing Blade Crack Disposal Plan and Comparison 汽轮机低压缸叶片断裂处理方案及比较
The inner casing of one extraction back pressure steam turbine is a cylindrical structure, the dummy piston and the nozzle chamber combine into one entity, without central separating interface, the inner surface of said inner casing to be smooth, without steam seal gland. 某台抽汽背压式汽轮机的内缸(平衡活塞与喷嘴室合为一体)为整体圆筒式结构,没有中分面,内缸内壁面为光面,没有汽封装置。
Study of Fabrication Process for 600 MW Steam Turbine LP Inner Casing 600MW汽轮机低压内缸装焊工艺研究
Improvement experiences of test run included that the heat preservation was applied to process gas by means of steam casing pipe and a sul-fur bosh was used to liquid sulfur tank. 试生产中的改进经验,包括过程气用蒸汽夹套保温,带有硫封的被硫储罐。
In thermal recovery wells, casing is heated by the injection steam and thermal stresses are produced in the casing. Casing deforms when the thermal stresses exceed the yield point of the steel. 在热力采油井中,注入蒸汽加热油层套管,油层套管受热产生压应力,当压应力达到套管钢材的屈服极限后,套管开始变形。
By means of these expressions, formulas for calculating the axial and radial forces on the casing are derived and then the influence of steam flooding on casing strength is qualitatively analyzed. 根据这些表达式进一步推导套管轴向力和径向力的计算公式,然后根据这些公式定性地分析注蒸汽采油对套管强度的影响。
Theoretical Research on the Temperature Field of Steam Turbine Casing 汽轮机汽缸温度场的理论研究
Based on the characteristics of steam flowing in the duct along tubes sheet and in the annular tunnel of casing tube, a physical and mathematical model is built up to describe condensation heat transfer process of this flow pattern. 根据蒸气在管束间和套管环形流道内流动特性,建立了适应该种流动凝结换热的物理及数学模型;
Condensing steam turbine is rebuilt into extraction heat supply turbine through the retrofitting of the casing and steam path, so as to have capacity to supply extraction steam without impact of inner efficiency and power output, and meet the requirements of heat users. 通过汽轮机汽缸和通流部分改造,将纯凝汽式汽轮机改造成为抽汽供热式汽轮机,使机组在不影响内效率和出力的前提下,具备一定的抽汽能力,满足用户热负荷的需求。
A casing was set in the new lifting zone, the pre lifting steam was injected through the casing and the fluidized steam injected at the bottom, thus a small fluidized bed was formed. 新型预提升段设一套筒,预提升蒸汽在套筒内注入,底部注入流化蒸汽,在底部形成了一个小流化床。
Theoretical Analysis on Heat Expansion of Steam Turbine Casing and Its Application 瞬态汽缸热膨胀的理论分析及应用
It describes and analysis accident of steam rubbing in turbine casing make accident, confirm the damage of steam rubbing, compare to the new turbine-design, point out discussion in every system of advantage and shortcoming. 针对汽轮机汽缸内因鼓风损失引起的事故进行分析、探讨,认定了蒸汽摩擦鼓风损失的危害,与新设计的机组对比,指出各自系统的优缺点。
The thermal heavy oil production technology has been widely applied to enhance oil rate. But the casing bore great thermal stress which caused by the high temperature of injected steam, and then reduced casing service life, especially on bending part. 稠油热采大大提高了油田的产量,但注入的高温蒸汽使得套管承受较大的热应力,而降低了套管的使用寿命,尤其对热采水平井弯管段的影响最为明显。
When adopting steam flooding or steam stimulation method, the issue of oil well casing damage has been a serious impact on many enterprises 'heavy oil production and economic efficiency. 稠油热采分为蒸汽驱、蒸汽吞吐和火烧油层等方法,其中在蒸汽驱和蒸汽吞吐采油技术中存在的油井套管损坏问题一直是严重影响稠油产量和企业经济效益的大问题。
During steam injection, the casing stress was influenced by many factors. But the main factor has a close connection with the coupling interaction of oil reservoir thermal field and stress field. It is the coupling interaction that caused the stress concentration and casing damage. 在稠油热采过程中,套管的受力环境十分复杂,与储层温度场、应力场的耦合作用紧密相关,正是这种复杂的多场耦合作用,使得套管产生应力集中而导致损坏。
In recent years, Deformation of the jointing surface can cause leak-off of steam from turbine casing, which is a great defect in new power units and long-term operating units. 近几年我国新装机组和长期运行机组会遇到因汽轮机结合面变形造成汽缸漏汽的重大缺陷,直接影响汽轮机机组运行的经济性和安全性。
In a thermal recovery environment based on steam injection, there are more complex factors behind casing failure. 在注蒸汽热采的环境下,影响套管损坏的因素更加复杂。