This paper analyzed the characteristics of managed pressure drilling (MPD) technology and impact of wellhead back pressure on the wellbore annulus pressure profile, and found that the application of this technology provides situation for improvement in the current CASING PROGRAM DESIGN. Meanwhile, the equivalent density of drilling fluid in wellbore annulus needs to consider the impact of back pressure. On this basis, CASING PROGRAM DESIGN for top-down DESIGN approach and multi-pressure system formation in MPD are established. Comparing and analyzing the results of CASING PROGRAM DESIGN in MPD and conventional drilling, it can be concluded that for the top-down DESIGN method, each layer of CASING can reach to a deeper depth. It can also reduce the CASING level for the multi-pressure system formation using wellhead back pressure to make the wellbore annulus pressure profiles bend. Thus, it can cleverly pass through the complex formation which needs multi-layer intermediate CASINGs in conventional drilling. In this condition, the well structure can be simplified.

Well integration aims to protect human life and the environment by reducing the risk of uncontrolled oil and gas production release during its life cycle. Well integrity requires safe connections for the CASING, tubing, and downhole equipment. In this research, using modeling and simulation software by finite element method, a premium connection has been DESIGNed, which is required for the current conditions of oil and gas wells. The connection was loaded according to the international standard ISO 13679 in a triaxial loading, including the axial loads of tension and compression with internal and external pressure. The analysis results were evaluated using the criteria of stress and sealability. The results showed that the DESIGNed connection fully meets the standard requirements. The amount of stress created at different loads is lower than the yield strength of the material, while the contact pressure of the sealing surfaces makes reliable sealability. It was found that DESIGN by finite element analysis can be a reliable and inexpensive tool and an alternative to physical experiments.

Modern pump and turbomachinery DESIGN merges innovative methodologies with computational tools for optimal efficiency and adaptability. This study delves into the intricate DESIGN of a parametric blade generator using Bézier curves, renowned for their precision in sculpting smooth, user-defined curves, and offering vast prospects in turbomachinery blade DESIGN. Leveraging this precision, our methodology employed eight pivotal anchor points to shape the Bézier surface blade: three at the base, three at the top, and two strategically placed midpoints. These midpoints enhance curvature control, ensuring the blade's form encapsulates the desired aerodynamic and fluid flow properties. Using these eight defined points and four bounding curves, the blade's holistic spatial profile was meticulously drafted. The CAD modeling system, with its advanced loft and guide curve functions, was instrumental in generating the blade surface, resulting in an aerodynamically adept profile optimized for maximum flow efficiency. Beyond the blade, the pump CASING geometry was another pivotal focus. Adopting a parametric shape generation for the CASING ensured system-wide DESIGN coherence, minimizing potential operational bottlenecks and inefficiencies. Classical optimization and iterative refinements were applied to the initial DESIGN, with each step analyzed to ensure the final model achieved high performance. Traditional blade DESIGN methodologies often offer limited flexibility, confining DESIGNers to specific templates and forms. However, this methodology provided greater DESIGN flexibility and set a new benchmark in performance optimization. As industries continually evolve and demand more from turbomachinery, the methodologies presented herein will be at the forefront, guiding us into an era of enhanced efficiency, adaptability, and innovation.

DESIGN and manufacturing technology of high pressure multistage pumps which are commonly utilized in oil and gas industries, used to be imported from foreign companies. Due to international sanctions against I. R. Iran, it started to be DESIGNed and launched domestically. Nowadays, all production lines including DESIGN, manufacturing and testing of these pumps have been performed by Iranian experts and they are highly competitive with similar pumps available in international market. This study presents a part of research on first domestic BB3-6×6 multistage pump DESIGN and manufacturing as a national project. Pump CASING was DESIGNed in and structural static analyses performed on it using Ansys. When the CASING was approved, a gating system was devised on pump upper half CASING and casting simulation was done by NovaCast. The effect of gating system on shrinkage defects was investigated. Results revealed that sprue size and riser location have a noticeable impact on shrinkage of part. This research illustrated that using simulation approach before manufacturing has a noticeable effect on production cost.

This paper reports on a numerical simulation of circumferential groove CASING treatment in a high-speed axial fan. Four circumferential grooves of the same geometry are located over the tip of a NASA Rotor-67 and unsteady calculations are performed from choke to near-stall. Results show that circumferential grooves reduce the incidence angle near the pressure surface at the blade leading-edge. Furthermore, the passage shock and the leakage flow are pushed rearward in the passage. It is found that circumferential grooves increase the momentum in the streamwise direction (fluid is absorbed by the grooves from their downstream part and is injected from their upstream section). The grooves also provide a flow path between the suction and pressure surface, leading to a reduction in the pressure difference between them. At the near-stall point the flow field near the grooves was found to be highly unsteady. Maximum unsteadiness was observed in the first upstream groove: the circulated mass flow rate changed as high as roughly 30 percent of its time-averaged value. As a result, in order to simulate circumferential groove CASING treatment in compressors, unsteady computations are required.

The globalization of economy, incredible advances in technology and social sciences, and the international move toward outcome-oriented evaluation of education PROGRAMs greatly necessitate changes in the traditional model of engineering education. Key elements for effective execution of changes in engineering education are the faculty members and education staff and authorities. From a research on Iran’ s engineering education staff, it was found that regardless of their location of employment (whether universities or industry), this groups came from a diverse academic background, which is often irrelevant to the concept of education. Their priority seems to be acquiring specialized professional trainings. A similar requirement in other countries has led to the establishment of higher education PROGRAMs in engineering education. The goal of these PROGRAMs, which are usually conducted in engineering faculties, is to train people who can be in charge of arrangement, coordination, guidance, execution, evaluation, and documentation of education. Furthermore it is aimed to enable the trainees to enhance the quality of education presentation in educational institutions, as well as the industry. The graduates of this PROGRAM will also be able to propose mechanisms to overcome the country’ s engineering education challenges and promote its quality through systematic research. In this paper, the work on feasibility, DESIGN and legislation the “ Master’ s PROGRAM in Engineering Education” is explained. The inauguration of Iran’ s first Master’ s PROGRAM in Engineering Education will take place in September 2019, at University of Tehran’ s Faculty of Engineering.

Intracytoplasmic sperm injection (ICSI) is one of the most successful techniques of Assisted Reproductive Technology (ART) and is mostly in use for the treatment of infertility with male factors. In this method, before injecting sperm into the intracytoplasmic of the oocyte, cumulus cells around the oocyte must be stripped to facilitate the injection process. To achieve this, both enzymatic and mechanical methods are used in embryological laboratories for denudation, which has major deficiencies, including the possibility of damaging the oocyte prior to the injection process. In this research, a microfluidic-based device is introduced for the separation of cumulus cells around the oocyte with minimum manual operations. The results prove high efficiency, and non-destructive denudation of the oocyte with the reduced amount of culture medium leads to the low-cost preparation process of oocytes. The process can also be integrated with ICSI chips under development and will be reported shortly.

CASINGs collapse causes the increase of costs to oil and gas production companies, every year. This problem can be seen not only at drilling time in some formations but also it can cause problems after the completion and exploitation. Accurate predict of collapse pressure is a very important factor in the DESIGN of the CASING. CASING collapse generally is a function of the geomechanical properties of the formation and the properties of the solid mechanics of the CASINGs. Some of the properties of solid mechanics that are effective on the CASINGs collapse are the ovality of the CASING, the difference in the thickness of the CASING and the existence of residual stress during the construction of the CASING. In this research, the effects of formation creep and the pipe construction defects on the collapse of the CASING through numerical methods have been investigated. The results of this study indicate that the pipe construction defects, such as CASING ovality and eccentricity reduce the strength of the CASING.

Background and Aims: Overlapping of the proximal surfaces of posterior teeth in the panoramic radiography is a major concern. Therefore, an option has been developed in the panoramic unit of Planmeca Promax, namely improved interproximal mode. This mode causes lower horizental angle with the teeth contact region during the unit rotation decreasing overlapping of the panoramic images of the posterior teeth especially premolar teeth. The present study was done to compare the overlapping of posterior teeth using two techniques of improved interproximal panoramic PROGRAM and standard panoramic.Materials and Methods: In this diagnostic study, 32 patients requiring panoramic radiographies at their posterior teeth during their routine diagnosis and treatment process with the mean age of 27.3 years were participated. No patients showed crowding of posterior teeth or missed and restored posterior teeth. The participants' panoramic radiographies were randomly taken by two techniques of improved interproximal panoramic and standard panoramic using Planmeca Promax device. The overlapping of the panoramic images was blindly assessed by an oral radiologist. The overlapping in both techniques was reported by frequency and percentage. The comparisons were done by Chi-square test between two techniques and the odds ratio of overlapping was estimated using regression analysis.Results: In standard panoramic techniques, 38.5% (148 contacts of 384 contacts) of the proximal surfaces overlapped while the overlapping of the proximal surfaces was observed in 18.8% (72 contacts of 384 overall contacts) in improved interproximal technique. Significant differences were noted between two techniques regarding overlapping (P<0.001). Also 66.4% and 39.1% of 4-5 teeth contacts overlapped in standard and improved techniques. The values were reported to be 39.1% and 12.5% in contacts of 5-6 teeth and 10.2% and 4.7% in the contacts of 6-7 teeth in both techniques, respectively. The overlapping odds ratio in improved technique as compared to standard techniques was 2.72 more. While the odds ratio of overlapping in the contact regions of 4-5 and 5-6 teeth was 16.4 and 4.61 as compared to the contact region of 6-7 teeth (all: P<0.001). The lower or upper jaw with the patients' mouth side did not significantly influence the overlapping of the proximal surfaces in both panoramic techniques.Conclusion: Under the limitations of this study, improved interproximal panoramic significantly reduced the overlapping of proximal surfaces in the panoramic radiographies of posterior teeth as compared to the standard panoramic technique. Therefore, it can be used to detect proximal caries in the posterior teeth as a diagnostic tool. Using this option may affect other part of panoramic image which should be investigated in other research.