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Kuwait City, Kuwait

The Kuwait National Petroleum Company is the national oil refining company of Kuwait. Established in October 1960, KNPC handles the responsibility of oil refining, gas liquefaction, and distribution of petroleum goods within the local market. Wikipedia.

El-Eskandarany M.S.,Kuwait Institute for Scientific Research | Shaban E.,Kuwait Institute for Scientific Research | Al-Shemmiri A.,Kuwait Institute for Scientific Research | Al-Shemmiri A.,Kuwait National Petroleum Company
International Journal of Hydrogen Energy

Reactive ball milling (RBM) technique was employed to synthesize ultrafine powders of MgH2, using high energy ball mill operated at room temperature under 50 bar of a hydrogen gas atmosphere. The MgH2 powders obtained after 200 h of continuous RBM time composed of β and γ phases. The powders possessed nanocrystalline characteristics with an average grain of about 10 nm in diameter. The time required for complete hydrogen absorption and desorption measured at 250 °C was 500 s and 2500 s, respectively. In order to improve the hydrogenation/dehydrogenation kinetics of as synthesized MgH2 powders, three different types of nanocatalysts (metallic Ni, Nb2O5 and (Ni)x/(Nb2O5)y) were utilized with different weight percentages and independently ball milled with the MgH2 powders for 50 h under 50 bar of a hydrogen gas atmosphere. The results showed that the prepared nanocomposite MgH2/5Ni/5Nb2O5 powders possessed superior hydrogenation/dehydrogenation characteristics, indexed by low values of activation energy for β-phase (68 kJ/mol) and γ-phase (74 kJ/mol). This nanocomposite system showed excellent hydrogenation/dehydrogenization behavior, indexed by the short time required to uptake (41 s) and release (121 s) of 5 wt% H2 at 250 °C. At this temperature the synthesized nanocomposite powders possessed excellent absorption/desorption cyclability of 180 complete cycles. No serious degradation on the hydrogen storage capacity could be detected and the system exhibited nearly constant absorption and desorption values of +5.46 and -5.46 wt% H2, respectively. © 2014 Hydrogen Energy Publications, LLC. Source

Almazrouee A.,College of Technological Studies | Aloraier A.,College of Technological Studies | Price J.W.H.,Monash University | Al-Dhafiri S.,Kuwait National Petroleum Company
Materials at High Temperatures

Petroleum refineries and power plants seek to extend the life of their aging components through weld repairs. Some of the repairs require stress relieving using post weld heat treatment (PWHT). However, PWHT is a cost and time consuming process. This paper provides a brief description of different alternative techniques for PWHT: half-bead welding, temper-bead welding and cold repairs. It presents a short survey about the different repairs techniques with or without the PWHT and their use in refineries and power plants in Kuwait and Australia. Some of these repairs now have had a successful life of over a decade; the oldest is nearly 20 years old. Details of the methods used are described and recommendations made concerning the alternative techniques. The availability of skilled labour turns out to be a decisive issue. © 2010 Science Reviews 2000 Ltd. Source

Safar M.,Kuwait University | Al-Hamadi H.,Kuwait National Petroleum Company | Ebrahimi D.,Kuwait University
International Journal of Information Technology and Web Engineering

Wireless sensor networks (WSN) have emerged in many applications as a platform to collect data and monitor a specified area with minimal human intervention. The initial deployment of WSN sensors forms a network that consists of randomly distributed devices/nodes in a known space. Advancements have been made in low-power micro-electronic circuits, which have allowed WSN to be a feasible platform for many applications. However, there are two major concerns that govern the efficiency, availability, and functionality of the network-power consumption and fault tolerance. This paper introduces a new algorithm called Power Efficient Cluster Algorithm (PECA). The proposed algorithm reduces the power consumption required to setup the network. This is accomplished by effectively reducing the total number of radio transmission required in the network setup (deployment) phase. As a fault tolerance approach, the algorithm stores information about each node for easier recovery of the network should any node fail. The proposed algorithm is compared with the Self Organizing Sensor (SOS) algorithm; results show that PECA consumes significantly less power than SOS. Copyright © 2011, IGI Global. Source

Kamel J.M.,Kuwait National Petroleum Company | Yigit A.,Kuwait University
Society of Petroleum Engineers - International Petroleum Technology Conference 2014, IPTC 2014: Unlocking Energy Through Innovation, Technology and Capability

Rotary oil-well drilling systems supplied with drag bits are used to drill deep boreholes for the exploration and the production of oil and natural gas. Drilling systems usually suffer from severe vibrations, which occur as axial, lateral and torsional oscillations. These vibrations mostly cause failures of drill-strings, abrasive wear of tubulars, damage of the bit, reduction of the rate of penetration (ROP), and incur high costs. Despite extensive research in this area, there is still a need to develop a consistent model that adequately captures all relevant phenomena such as nonlinear cutting and friction forces at the bit/formation interface, drive system characteristics and coupling between various models of vibrations. This study presents a physically consistent nonlinear lumped-parameter model for the coupled axial and torsional motions of a rotating drill string equipped with a drag bit. An innovative cutting and contact model is used to model rock/bit interaction. The dynamics of rotary and axial drive systems including hoisting system are also considered. The equations of motion are solved numerically to carry out parametric studies. The effects of various operational parameters are investigated for achieving a smooth and efficient drilling. The proposed model appears to capture stick-slip and bit-bounce as the simulation results qualitatively agree well with field observations and published theoretical results. The rotational and axial motions of the bit are obtained as a result of the overall dynamic behavior rather than prescribed functions or constants. The results show that with a proper choice of operational parameters it is possible to minimize the effects of stick-slip and bit-bounce and to increase the ROP. Therefore, it is anticipated that the results will help reduce the time spent in drilling process and costs incurred due to severe vibrations and consequent damage to equipment. Copyright 2014, International Petroleum Technology Conference. Source

Al-Zayed A.S.,Kuwait University | Asad Allah M.B.,Kuwait National Petroleum Company | Mahmoud S.F.,Kuwait University | Mahmoud S.F.,Cairo University
Applied Computational Electromagnetics Society Journal

A microstrip meander line with a single H-shaped Defected Ground Structure (HDGS) is employed to design a novel compact lowpass filter with sharp roll off and wide stop band. Two parametric studies were conducted to analyze the sensitivity of the HDGS position and the size effects on the filter response. The design is fabricated to have a 6 GHz cutoff frequency using Rogers TMM 10i substrate, with an area of 7.6 × 6 mm2. The measured results are in a good agreement with simulation prediction. © 2014 ACES Source

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