Ultra-Low Pressure Wellbore Cleanouts Using Micro-Vacuuming Technology and Concentric Coiled Tubing

In instances of ultra-low bottom hole pressure (BHP) where the results of conventional cleanout methodologies range from<br>inefficient to ineffective, wellbore vacuuming technology has proven to be a reliable alternative. Technology using concentric<br>coil-in-coil tubing (CCT) design was developed in 1995 and is being used as an effective method to remove both unwanted<br>liquids and solids from wells where formation pressure is prohibitively low for conventional cleanout techniques.