| The aim of this project is to study the flow dynamics and impact pressure of nozzles used in the hydraulic system of oil drilling rigs.;Development of drill bit technology has been closely related to the comprehension of the hydraulic phenomenon. Hydraulics is a main factor in the drilling process; a good understanding of these parameters could insure a successful drilling. To improve the rate of penetration it was decided to understand the main functions of this drilling fluid: (1) Cutting removal from the drill bit and the well bottom; (2) Cooling the cutting tools; (3) Lubrification; (4) Relief of hydrostatic pressure.;Two years ago, a test rig was built in Louisiana State University in order to investigate the influence of nozzles geometry on the flow dynamics and pressure distribution. Experiments had been conducted to compare the effects of four non-cylindrical nozzles versus a regular one. These tests included the measurement of the discharge coefficient and the plotting of 3-dimensional impact pressure mappings. This particular test rig was moved to the Fluids Mechanic and Propulsion Laboratory of the University of Cincinnati and modified to provide a tool capable of testing nozzles used in roller cone bits. |
