The purpose of this document is to identify information regarding hydraulic motion and fluid dynamics through small diameter pipes and well-bores. Of particular interest will be tubing diameters ranging from 3.00? to approximately 1.00? with specific application for Coil Tubing Drilling (CTD). As a result of this requirement, an extensive literature search was conducted that included, but not limited to, academic research, professional and technical papers, patents, professional periodicals, government research projects and technical manuals from coil tubing manufacturers. The scope of this document will include any available information specific to technologies associated with the dynamics of fluid motion during drilling and production operations. As a result of this statement, the formation and conclusion of this document will specifically pertain to critical factors regarding the drilling process and the subsequent production rates from various coiled tubing diameters if available. The data will include critical factors of fluid behavior, any available simulations and a general understanding of fluid flow in the process of CTD.