Engineering

Engineering Research Papers/Topics

Comparative Analysis And Prediction Of Remediation Rates Of Microbes In Simulated Polluted Soil Samples

ABSTRACT    The study compared and predicted the remediation rates of microbes using the rate removal of Total Petroleum Hydrocarbon Content (TPHC) of a crude oil polluted land. This  was done using field experimental data generated from the soil of the Federal University of Technology Owerri Research Farm in Imo State, Nigeria. The soil was artificially polluted in the laboratory with crude oil - Bonny light - with specific gravity of 0.8323. Petroleum contaminant present in the soil was ...

Characterization Of Nigerian Crude Oil Wax

ABSTRACT Flow assurance is the efficient and successful flow of fluids in pipes. Some of the flow assurance challenges that can be encountered include hydrate formation, which is prevalent offshore, sand deposition, wax precipitation, scale deposits, or emulsion problems. In onshore production facilities in the Niger delta, wax deposition is the major challenge to efficient fluid flow. Consequently, it has been the focus of research to proffer effective predictive control measures to a probl...

Buckling And Vibration Analyses Of Line Continuum Using 6 X 6 Stiffness Matrices

ABSTRACT  This research work presents buckling and vibration analyses of line continuum using 6 x 6 stiffness matrices. The study used six term Taylor McLaurin’s polynomial series shape function and the stiffness matrices were developed using energy variational principle. Two deformable nodes were considered at the centre of the continuum which brings the number of deformable nodes to six. The six term Taylor McLaurin’s shape function was substituted into strain energy equation and the r...

Detailed Analysis Of Pressure Drop In A Large Diameter Vertical Pipe

ABSTRACT With the ever increasing need to optimize production, the accurate understanding of the mechanics of multi-phase flow and its effect on the pressure drop along the oil-well flow string is becoming more pertinent. The efficient design of gas-lift pump, electric submersible pumps, separators, flow strings and other production equipment depends on the accurate prediction of the pressure drop along the flow pipe. Pressure is the energy of the reservoir/well and it is crucial to understa...

Prodigiosin Encapsulated Poly Lactide-Co-Glycolide (PLGA)- Coated Stent For Coronary Cardiovascular Interventions

ABSTRACT This research focuses on the design of a robust but flexible prodigiosin eluting stent coating for possible coronary cardiovascular implant. When coated with the drug embedded polymer matrix, the stent would be expected to dilate the vessel around the fatty blockages while the drug eluting polymer membrane delivers anti-proliferative drugs over a period of time to prevent the restenosis that otherwise would occur. The goal of this work is to incorporate anti-cancerous drug prodigios...

Assessment Of The Reliability Of Thermal-Hyraulic And Neutronics Parameters Of Ghana Research Reactor-1 Control Systems

ABSTRACT The thermal–hydraulics and neutronics parameters of GHARR-1 control systems were assessed for its reliability after 18 years of operation using the Micro-Computer Closed Loop System (MCCLS) and original Control Console (CC). The MCCLS and some components that control the sensitivity and the reading mechanism of the meters on the control systems have been replaced with new ones over the years, due to ageing, repairs and obsolescence. The results show that when reactor is operated a...

Failure Mechanisms Of Epoxy Coatings In Pipelines

ABSTRACT Epoxy, a thermosetting polymer due to its attractive properties, has been widely used in many industries as a coating material such as the oil and gas industries. This study provides an insight into the corrosion behavior of epoxy looking at its adsorption properties at the epoxy steel interface and the adhesion behavior for different corrosion environments. The study was carried out using conventional weight-loss measurements and microscopic observation after immersion in Hcl of va...

An Approach To Identifying The Optimal Time To Initiate Stimulation Operations.

ABSTRACT This research describes the application of a production economic approach which attempts to quantity stimulation treatments performed on different wells undergoing a decline phase in their production and to obtain based on the output from the model the best time during the declining phase of the wells to initiate stimulation treatments. Two different production decline models were considered in this work i.e., the exponential model and the hyperbolic model. The optimization models w...

Strength And Fracture Of Earth-Based And Natural Fiber-Reinforced Composites

ABSTRACT This study examined the mechanical properties of earth-based materials that are relevant to the future development of affordable housing. Earthcrete structures were produced by mixing various proportions of laterites, clay and cement, while natural fibre-reinforced composites were produced by mixing earth-based matrices with natural fibre (Straw). Mechanical testing showed that optimum performance of the various samples was obtained at a fibre content of 20% by volume, with compress...

Design, Construction And Evaluation Of Charcoal, Activated Carbon, Moringa Seed And Sand Water Filtration Systems

ABSTRACT The majority of human population especially in developing countries suffers from waterborne diseases such as skin abscesses, cellulitis, skin infections, and diarrhoea due to improperly treated water. Safe drinking water remains unavailable to a large portion of the global population and this is a global concern. This work focused on the design, construction and evaluation of charcoal, activated carbon, Moringa seed and sand water filtration systems with an objective of evaluating t...

Effects of Bending and Stretching on Hybrid Organic- Inorganic Trihalide Perovskite Solar Cells

Abstract In the recent decade, hybrid organic- inorganic trihalide perovskite solar cells have attracted significant interest from the scientific community due to their unique optoelectrical properties, ease and low cost of fabrication. Extensive research has been carried out to understand the electrical and optical properties of this novel material with a view to boosting the efficiency of the system. However, not much has been done to understand the mechanical properties of the system. The...

Theoretical Justifications For Rate Decline Trends In Solution-Gas Drive Reservoirs, And Reservoir Property Estimation Using Production Data

ABSTRACT Rate decline analysis is an essential tool in predicting reservoir performance and formation property estimation. The use of historical production data to predict future performance is the focus of the empirical domain of decline analysis while the theoretical domain focuses on the use of such data to estimate formation properties. A number of attempts have been made to establish the theories of rate decline in solution gas drive reservoirs. Such attempts have established the theore...

Evaluation Of Optimal Designs For Infill Well Drilling For Water Flood Systems

ABSTRACT One of the ways of maximizing recovery from a reservoir is by drilling infill wells. Infill well placement is challenging because many well scenarios must be evaluated when undertaking the optimization program and very often, the variables that affect reservoir performance are nonlinearly correlated with some degree of uncertainty. Resultantly, the use of stochastic search algorithms has gained wide acceptance in solving problems associated with well placement. This research seeks t...

Assessment Of Heavy Metal Pollution In Soil And Surface Water In Mng-Gold, Kokoya District, Bong County, Liberia

ABSTRACT The presence of heavy metals in water and soil by metalliferous mining activities at MNG-Gold Mine was fully investigated. The extraction of gold in recent years, has led to the generation of huge quantities of solid and liquid wastes. During the course of the investigation, fourteen samples including surface water, groundwater and soil were collected and analyzed to determine physio-chemical parameters and heavy metal contents. Atomic Absorption spectrometer (AAS FS 240) was used t...

Pressure Analysis Of A Well With An Inclined Hydraulic Fracture In A Naturally Fractured Reservoir

Abstract Hydraulic fracturing has been an effective technique to stimulate damaged wells or wells producing from low-permeability formation. It has been established that the orientation of a hydraulic fracture is perpendicular to the direction of the least principal stress in the formation. Thus, most pressure transient analysis techniques are based on the assumption that the fracture is vertical. However, it is now generally agreed that the direction of the least principal stress is not alw...


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