Effect of Drillpipe Rotation on Cuttings Transport in Horizontal Wellbore Section

In this project interaction between drill pipe rotation and drilling fluid to remove the cuttings from horizontal concentric annuli were simulated using ANSYS CFX 14 Computational Fluid Dynamics (CFD). CFD software has proven to be successful tool in studying fluid flow in bit hydraulic and gas liquid flow in pipeline and separator. Investigation of drill pipe rotation effect on cuttings volume fraction and annular pressure losses has been validated against flow loop tests conducted by Ozbayoglu and Saasaen (2008). Cuttings transport has been one of the major concerns during drilling horizontal and directional wells cleaning. Inadequate hole cleaning significantly affect cost, time and quality of horizontal wells. Improper hole cleaning may lead to number of problems such as pipe sticking, causing higher drag and toque, slower rate of penetration, formation of fractures and wellbore steering problems, especially in eccentric horizontal annulus. Our aim is to simulate the pipe rotation to achieve better transport of cuttings from horizontal annuli during conventional drilling. The process includes using ANSYS CFX 14 software to simulate the flow of water–flow medium through two concentric cylinders annuli containing initial stationary cuttings bed. The inner cylinder rotates while the outer is fixed. The parameters of focus Newtonian fluid (water) and cuttings concentration and rotary speed, would be varied accordingly and the effects on cuttings concentration and friction pressure losses would be observed. Data obtained has been validated against experimental data by Ozbayoglu and Saasaen (2008) which showed a good agreemen

Noise in Telecommunication: Different Types and Methods of dealing with Noise

This article discusses noise in telecommunications: different types and methods of dealing with noise. Noise is arguably a very hated problem because it can interfere with the quality of signal reception and also the reproduction of the signal that will be transmitted. Not only that, but noise can also limit the range of the system to a certain emission power and can affect the sensitivity and sensitivity of the reception signal. Even in some cases, noise can also result in a reduction in the bandwidth of a system. Of course, we've all felt how annoying the noise effect is. For example, when listening to the radio, a hissing sound appears on the loudspeaker due to noise. To overcome noise, it is divided into passive noise control and active noise control. Passive noise control is an effort to overcome noise using components that do not require power. Generally passive noise control uses soundproof materials that act as insulation against noise. The method most commonly used to overcome noise is through increasing the gain. The noise is generally in a specific sound area. Hiss is on high frequencies, while noise and hum are on low frequencies. This is the principle underlying the noise reduction method

Performance of Free Software and Freeware in Telecommunication System

This article discusses the Performance of Free Software and Freeware in Telecommunication System. Software or software is a special term for data that is digitally formatted and stored, including computer programs, their documentation, and various information that can be read and written by a computer. In other words, part of a computer system that is intangible. This term emphasizes the difference from computer hardware. Making the software itself requires a "programming language" written by the programmer which is then compiled with the compiler application so that it becomes code that can be recognized by the hardware machine

Effect of Drillpipe Rotation on Cuttings Transport in Horizontal Wellbore Section

In this project interaction between drill pipe rotation and drilling fluid to remove the cuttings from horizontal concentric annuli were simulated using ANSYS CFX 14 Computational Fluid Dynamics (CFD). CFD software has proven to be successful tool in studying fluid flow in bit hydraulic and gas liquid flow in pipeline and separator. Investigation of drill pipe rotation effect on cuttings volume fraction and annular pressure losses has been validated against flow loop tests conducted by Ozbayoglu and Saasaen (2008). Cuttings transport has been one of the major concerns during drilling horizontal and directional wells cleaning. Inadequate hole cleaning significantly affect cost, time and quality of horizontal wells. Improper hole cleaning may lead to number of problems such as pipe sticking, causing higher drag and toque, slower rate of penetration, formation of fractures and wellbore steering problems, especially in eccentric horizontal annulus. Our aim is to simulate the pipe rotation to achieve better transport of cuttings from horizontal annuli during conventional drilling. The process includes using ANSYS CFX 14 software to simulate the flow of water–flow medium through two concentric cylinders annuli containing initial stationary cuttings bed. The inner cylinder rotates while the outer is fixed. The parameters of focus Newtonian fluid (water) and cuttings concentration and rotary speed, would be varied accordingly and the effects on cuttings concentration and friction pressure losses would be observed. Data obtained has been validated against experimental data by Ozbayoglu and Saasaen (2008) which showed a good agreemen