No abstract

No abstract

Dispersion is one of the fate processes of oil spill. This research has been carried out on the numerical simulation of the dispersion of crude oil using the model obtained from the work of Hamam (1987). The model was solved with the explicit, implicit and Crank-Nicolson methods of solution of partial differentiation equations with the aid of MATLAB, and the concentration of the crude oil dispersed in water was obtained. The results obtained revealed that the three methods could be used to study the process because the profiles given by all of them were very similar. Also discovered from the investigations carried out was that the concentration of crude oil was decreasing with time for a particular spatial point while, for a particular time, it was increasing along the length of the water body. It was also discovered that experiments would be very necessary in order for the validation of the results obtained from the simulations.

No abstract

Drilling in search for hydrocarbon is an essential component of exploration and production activities. Chemicals, Drill rig, Casing, Tubing, Drill pipes and bits are basic requirements to successfully drill a well. Rotary Drilling rig is very crucial among the basic requirements. A major function of rotary drilling rig, is continuous circulation of drilling fluid and removal of cuttings. Hence, this paper focused on the design and construction of drilling rig prototype, for training purposes in academic environment. Components were constructed from the most suitable materials obtained from metal scraps individually, and when put together forms an integrated system that enables the drilling process to make a well. The prototype was produced successfully. The mixing hopper, hoisting and the mud circulatory systems were fully incorporated and connected. The rig prototype was, in principle, to transport fluid from the mud pit up the stand pipe to the swivel via the rotary hose down the drill pipe to the annulus and back to the mud pit through the shale shaker, De-sander, De-gasser, De-silter units, via the mud return line. The drawworks is to lift the drill pipe and lower it back into the rotary table with the aid of the drawworks motor and a top drive system.