Browsing by Author "Abdulraman S. O"

Now showing 1 - 5 of 5
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    Comparative analysis of drilling performance of kymera and PDC bits in salt formation
    (2020) Alaba O.C.; Abdulraman S. O
    The study compares the drilling performance of Kymera and PDC bits in salt formation using River and Delta State Continental Shelf of Nigeria as a case study. The measurement while drilling (MWD) and the logging while drilling (LWD) methods were used to measure the real time well drilling operation. well formation and drilling statistics. The data obtained from the Ogbaimbiri. Ossiomo. Utorogu and Okporhuftu wells have the penetration rate of 6.2 m/hr. 5.9 m/hr. 12.2 m/hr. 6.3 m/hr for Kymera bit and 4.2 m/hr. 3.4 m/hr. 6.8 m/hr. 3.9 m/hr for PDC bit respectively. The pearson correlation coefficient has a value of r = 0.897. n = 4. p<0.05 and r = 0.784. n = 4. p<0.05 for both kymera and PDC bits. The results established a strong and positive correlation between the penetration rate and distance drilled in each bit. It also shows that the higher the penetration rate the more the distance drilled by each bit. The study concluded that the Kymera bit was more efficient as it was able to penetrate the different formations with a lesser time and at a greater penetration rate.
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    CRUSHING PLANT PERFORMANCE EVALUATION USING OEE
    (2019) Abdulraman S. O; Ozigis I. I
    Over the years, economy of scale has been adopted as a panacea to the poor return on investment (ROI) in aggregate quarry establishments. This has forced quarries to increase their capital expenditure (CAPEX) due to acquisition of large capacity equipment that are often very costly. Low commodity (chippings) prices and high energy costs have further compelled quarry operators to adopt cost effective operating strategy. The true cost effectiveness of aggregate quarries lies in their performances and life cycle costs, of which their performances depend on their equipment availability, utilization and efficiency. Quarry equipment availability, utilization and efficiency are therefore very important performance indices that a quarry operator needs to constantly evaluate to work within the threshold, if the quarry business must deliver high ROI or quick payback which ultimately is the prime objective of any business. Overall Equipment Effectiveness (OEE) is a well-known performance metric which combines availability, utilization and efficiency for the evaluation of crushing plant effectiveness in an aggregate quarry. The performance metrics of F and P quarry, Abuja, Nigeria have been determined, and the plant availability (A); utilization (U); efficiency (E); and OEE evaluated to be 77.55%, 65.08%, 33.15%, and 16.62% respectively. The OEE value is far below the global best standard of 85% for manufacturing system, and reflects the influence of plant availability, utilization and efficiency on OEE value. However, there is no literature on the use of OEE for granite crushing plant, though; attempts have been made to use the metric on drilling machines, loading and haulage facilities. This paper presents a procedure for estimating OEE of a crushing plant; explains the cause for poor OEE in Nigerian plants during rainy season; and reason why Nigerian crushing plants should run with generators of adequate power outputs; and not on external power source.
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    Determination of an Appropriate Exploitation Method for Sobi and Oloje Clay Deposits for Production of Bricks and Ceramic Work; Ilorin, Nigeria
    (2012) Abdulraman S. O; Olaleye, B.M
    Current exploitation practice of llorin clay deposits in Nigeria has been investigated to be largely dominated by female artisans (old and young) who depend solely on crude implements such as sticks, spades and baskets with resultant premature abandonment of mined out pits. Exploratory pits were dug to probe the profile of the deposits in the two locations (Sobi and Oloje) and the borehole data of the deposits were used to produce isopach map of the deposits. Several equipment combinations were considered for the exploitation of the deposits. Stripping by bulldozer was favoured to be most appropriate.
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    Evaluation of Remedial Option's Efectiveness of Lead Contaminated Site in Bagega Community, Zamfara State , Nigeria
    (2017) Alaba O. C.; Abdulraman S. O
    The study evaluates the remedial option's effectiveness of lead contaminated site in Bagega community, Zamfara state. Samples of soil and water were collected from residential compounds (BRC), residential garden (BRG), village common area (BVC), processing areas (BPA), farmland areas (BFA), wells (BWE), boreholes (BBH) and ponds (BPO)water at the same locations before and after remediation using standard procedures of ASTM D6907 and APHA respectively. The concentrations of lead metal in soil and water samples before and after remediation were determined using Atomic Absorption Spectrophotometer (AAS) in accordance with ASTM D 3559 and ASTM D1976 standard methods. The results revealed that soil samples recorded the highest lead concentration reduction of 96.1% in BRG while the least lead concentration reduction of 51.7% was recorded in BFA after remediation. Water samples recorded least lead concentration reduction of 21.0 % in BBH and highest lead concentration reduction of 70.8% in BPO after remediation. On the health risk analyses, BPA/01, 07 and 11; BFA/04, 07 and 08 posed health risk to the people while BPO/02, 06 and 09 posed no health risk to the people after remediation. The study therefore concluded that remediation was completely effective at BRC, BRG and BVC but it was not completely effective at BPA and BFA.
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    Prioritisation of Maintenance Policies for Upstream Equipment in A Typical Quarry Using Decision Maintenance Grid (DMG)
    (2016) Abdulraman S. O; Olaleye B. M; Saliu M. A
    This paper provides a framework for equipment maintenance management with options that allow decision makers to select the most successful ways to manage maintenance. Keeping diverse range of equipment working efficiently, managing downtime and achieving output targets in quarries can be something of a juggling act for quarry operators/ managers. The paper also provides an overview of maintenance strategies suitable for upstream equipment in Construction Products Nigeria (CPN) quarry. It considered their respective applications based on operation and failure data of equipment evaluated from the quarry report system (QRS). A decision maintenance grid (DMG) was employed to decide the most appropriate maintenance strategy for the equipment based on their availability values and failure frequencies. It was found out that forward planning is critical to prevent unscheduled downtime and setting up an effective preventive maintenance schedule should be an essential part of the quarry upstream equipment management process.