共查询到20条相似文献,搜索用时 93 毫秒
1.
2.
3.
连续油管作业技术是一项具有广阔应用前景的实用性技术,该作业技术能实现各种常归和复杂的井下作业.连续油管作业机关键部件是注入头,注入头的动作要求与油管另一端缠绕的油管滚筒有相互的协同动作关系,以保证在注入及上提油管的作业时油管的合理受力,防止过卷及过放.该文针对连续油管作业机液压系统设计过程中对注入头与滚筒协同作业部分的液压控制提出3种方案并对3种方案进行比较分析. 相似文献
4.
5.
油管缺陷在线检测仪的研究 总被引:12,自引:2,他引:12
文中研究了油管局部缺陷和壁厚减薄缺陷的漏磁场检测原理。研制了一种新型的井口式油管缺陷检测仪,缺陷检测传感器的组合式探头具有自动张合、浮动和随动功能,能够满足油管在线检测对检测传感器的要求。仪器可用在井口对油管进行在线连续定量检测,检测结果不受管表面的油泥或其它非导磁性材料的影响。测试表明,该仪器具有精度和分辨率高,结构简单,安装方便,性能可靠等优点。 相似文献
6.
针对CY-K52数控机床叶片泵进油口位置与进油管位置不对中,造成叶片偏斜、刮研缸壁、叶片泵损坏的情况,对进油管位置进行了改进,使进油口位置与进油管位置对中,叶片泵工作正常,提高了生产效率。 相似文献
7.
连续油管与各种井下工具之间的连接是制约连续油管推广应用的一个重要因素。首先基于连续油管与万向节的连接方式通过受力分析对滚压连接进行失效分析,主要有剪断和滑脱两种失效形式,然后以Φ38.1×3.18 mm连续油管为例建立二维模型并基于ANSYS进行有限元分析,得出连续油管连接处应力与应变分布结果以及最大应力所在位置,最后分别改变圆弧槽的半径、弧高及倒角尺寸进行有限元分析,对连接槽的尺寸进行优化,确定了连接槽为半圆弧槽且其半径为1.9 mm,最佳个数为3个。 相似文献
8.
《现代制造技术与装备》2016,(5)
连续油管计数器是连续油管作业机滚筒上的一个部件,用于测量连续油管的入井深度,为油田施工提供重要依据。然而,目前连续油管计数器误差大,对现场施工造成一定影响,而误差的主要来源于连续油管与计数轮之间的相对滑动。为减少该部分误差,本论文提出一种基于信号处理以提高测量精度的测量方式。基本方案是采用双计数轮—编码器总成,然后进行信号补偿,以获得更准确的连续油管入井深度。 相似文献
9.
10.
11.
根据四辊轧机的工作原理和特点,提出了借助气动元件控制测量力、并利用磁栅传感器进行精密测量的实现方案。介绍了与磁栅传感器相配合的数显仪表的基本功能,以及测量数据向计算机传输的方法,提出了针对工业现场的计算机程序编制思路,论述了测量数据的计算机处理过程,给出了提高程序稳定性的方法。 相似文献
12.
This paper is a continuation of the authors’ previous work on spiral coil heat exchangers. In the present study, the heat
transfer characteristics and the performance of a spirally coiled finned tube heat exchanger under wet-surface conditions
are theoretically and experimentally investigated. The test section is a spiral-coil heat exchanger which consists of a steel
shell and a spirally coiled tube unit. The spiral-coil unit consists of six layers of concentric spirally coiled finned tubes.
Each tube is fabricated by bending a 9.6 mm diameter straight copper tube into a spiral-coil of four turns. The innermost
and outermost diameters of each spiral-coil are 145.0 and 350.4 mm, respectively. Aluminium crimped spiral fins with thickness
of 0.6 mm and outer diameter of 28.4 mm are placed around the tube. The edge of fin at the inner diameter is corrugated. Air
and water are used as working fluids in shell side and tube side, respectively. The experiments are done under dehumidifying
conditions. A mathematical model based on the conservation of mass and energy is developed to simulate the flow and heat transfer
characteristics of working fluids flowing through the heat exchanger. The results obtained from the present model show reasonable
agreement with the experimental data. 相似文献
13.
介绍了各类盘管弯制的新工艺及工装。原有的圆管盘管和半管盘管中的柱面螺旋盘管、平面盘管和曲面盘管的结构繁杂、弯制质量差以及弯制工艺工装造价昂贵。为改变这种情况,对各类盘管的弯制工艺和工装进行了革新,并取得了良好的效果。此项技术已获得专利。本文第二部分介绍半管盘管的弯制工艺及工装。 相似文献
14.
为研究连续管磨损对防喷盒胶筒密封性能的影响,归纳连续管常见磨损形式并构建其磨损几何模型,以通径为38.1 mm防喷盒胶筒为例,通过实验得到其材料本构模型参数,建立防喷盒胶筒密封连续管的有限元模型;以有效接触应力和最大Mises应力为指标,分析连续管的磨损形式、磨损深度、磨损长度以及偏磨角度对胶筒密封性能的影响。结果表明:连续管偏磨形式对胶筒密封性能影响较大,连续管偏磨段长度大于胶筒高度且偏磨深度大于1 mm时,胶筒密封能力会出现不能满足井口密封要求的情况;偏磨角度会影响胶筒的应力分布,从而影响密封性能。 相似文献
15.
16.
Ju-Won Kim Yong-Bin Im Jong-Soo Kim 《Journal of Mechanical Science and Technology》2006,20(7):1059-1067
In order to develop a compact evaporator, experiments that show characteristics of evaporating heat transfer and pressure
drop in the helically coiled minichannel were performed in our previous research. This study was focused on the performance
analysis of helically coiled heat exchangers with circular minichannels with an inner diameter=1.0 mm. The working fluid was
R-22, and the properties of R-22 were estimated using the REFPROP program. Numerical simulation was performed to compare results
with the experimental results of the helically coiled heat exchanger. As the heat transfer rate and pressure drop were calculated
at the micro segment of the branch channels, the performance of the evaporator was evaluated. The following conclusions were
obtained through the numerical simulations of the helically coiled heat exchanger. It showed good performance when the flow
rate of each branch channels was suitable to heat load of air-side. The numerical simulation value agreed with experimental
results within ± 15%. In this study, a numerical simulation program was developed to estimate the performance of a helically
coiled evaporator. And, an optimum helically coiled minichannels evaporator was designed. 相似文献
17.
18.
19.