阀门质量检验问题分析与建议

通过对2013年油田入库阀门质检情况进行统计,对几类典型质量问题进行分析,找出目前质检工作中存在的不足,为进一步把好阀门检验质量关提出建议。     

提高柱塞泵容积效率的新途径

阀配流柱塞泵的吸、排油阀,由于运动滞后,造成泵的容积效率下降,这是该类泵的一个主要技术缺陷。本文设计了一种新型配流阀,解决了运动滞后问题,容积效率得到大幅度提高。同时文中对新型配流阀的设计计算,进行了探讨。     

整车静态气密性试验的分析及应用

文章介绍了用正压法测试整车静态气密性试验的方法,从一个整车测量的气密性数据对整车气密性状态进行分析。根据分析情况,提出了提高整车气密性的方向和措施。     

The healthcare burden of disease progression in medicare patients with functional mitral regurgitation

Abstract

Objective: This retrospective database analysis estimated the incremental effect that disease progression from non-clinically significant functional mitral regurgitation (nsFMR) to clinically significant FMR (sFMR) has on clinical outcomes and costs.

Methods: Medicare Fee for Service beneficiaries with nsFMR were examined, defined as those with a heart failure diagnosis prior to MR. Patients were classified as ischemic if there was a history of: CAD, AMI, PCI, or CABG. The primary outcome was time to sFMR, defined as pulmonary hypertension, atrial fibrillation, mitral valve surgery, serial echocardiography, or death, using a Cox hazard regression model. Annualized hospitalizations, inpatient hospital days, and healthcare expenditures were also modeled.

Results: Patients with IHD had higher risk (Hazard Ratio?=?1.22 [1.14–1.30]) for disease progression compared to patients without. The progression cohort had significantly more annual inpatient hospitalizations (non-IHD?=?1.32; IHD?=?1.40) than the non-progression cohort (non-IHD?=?0.36; IHD?=?0.34), and significantly more annual inpatient hospital days (non-IHD?=?13.07; IHD?=?13.52) than the non-progression cohort (non-IHD?=?2.29; with IHD?=?2.08). The progression cohort had over 3.5-times higher costs vs the non-progression cohort, independent of IHD (non-IHD?=?$12,798 vs $46,784; IHD?=?$12,582 vs $49,348).

Conclusion: Treating FMR patients earlier in their clinical trajectory may prevent disease progression and reduce high rates of healthcare utilization and expenditures.     

提高自动量热仪的测试精度和稳定性

对影响自动量热仪测试精度和可靠性的问题进行分析,并采取切实有效的改进措施以提高了自动量热仪的测试精度和准确度。     

整车静态气密性试验的分析及应用

文章介绍了用正压法测试整车静态气密性试验的方法，从一个整车测量的气密性数据对整车气密性状态进行分析。根据分析情况，提出了提高整车气密性的方向和措施。     

模糊综合评价法在热力膨胀阀故障分析中的应用研究

通过对热力膨胀阀结构、工作原理和常见故障的阐述,构建热力膨胀阀故障因素层次分析模型,采用模糊综合评价法对影响热力膨胀阀故障的因素进行评价,为优化维修过程和改进设计提供了参考。     

300MW机组供热改造振动解决方案

描述第一次供热改造方案及改造后的振动现象,分析第一次供热改造方案引起机组振动的原因,介绍第二次供热改造方案和实施效果。     

浅谈液压系统的负载感应控制技术

负载感应控制有利于提高液压系统的效率和节能,在液压系统中得到了广泛应用。文章介绍了简单的液压系统中的负载感应控制及其原理。     

CCV井下钻井工具及其新工艺、新技术在苏丹油田的使用

在油气勘探开发中,研究先进的钻井工具、新工艺、新技术对降低钻井成本、降低事故发生率、提高钻井效率有着重要意义。钻井过程中发生的轻微的漏失会使钻井工作中断,如井漏得不到及时处理,还会引起井喷和卡钻等事故,CCV(Centurioncirculate valve(可多次开关式循环分水接头))接头的出现,对处理井漏事故复杂提供了工具保证和技术支持。