Application of New Hole Cleaning Optimization Method within All Ranges of Hole Inclinations

During drilling operation, as inclination of well deviates from zero degree in vertical parts to 90 degree in horizontal and<br>extended reach wells, hole cleaning and cutting removal condition imposes more influence on drilling performance and<br>encountering associated problems with poor hole cleaning. Some models have been developed to predict the minimum flow<br>rate required to clean the hole, such as Larsen's model, which works within inclinations from 55 to 90 degree.