Abstract
The deep-sea drilling vessel "CHIKYU" is a riser-equipped, dynamically positioned scientific drill ship owned and operated by the Japan Agency for Marine-Earth Science and Technology (JAMSTEC), and built for the purpose of scientific research and exploratory expeditions. Recently, measurement while drilling (MWD) technology can transmit real-time data from the downhole to the upper surface of the vessel using a pressure wave, i.e., mud pulse, generated with a pressure modulator through the drill string. In this study, a numerical one-dimensional fluid model has been designed and analysis carried out under the assumption of a pressure modulator located within the drill pipe to monitor mud pulse simulations.
