THERAPEUTIC COMPOSITION BASED ON HYDROXYETHYLCELLULOSE AND 2-PYRROLIDINE FOR MAINTENANCE OF OIL WELLS

摘要

THE INVENTION CONCERNS A THICKENING COMPOSITION INTENDED TO INCREASE VISCOSITY OF AQUEOUS MEDIA, ESPECIALLY HEAVY BRINE, AND COMPRISING HYDROXYETHYLCELLULOSE, 2-PYRROLIDINE AND A MONOALKYL ETHER AND ETHYLENE GLYCOL, THIS COMPOSITION IS SOLUBLE IN WATER AND NOT PRODUCING AN APPRECIABLE EFFECT OF HYDROXYETHYLCELLULOSE SWELLING, THE PONDERAL RATIO BETWEEN HYDROXYETHYLCELLULOSE AND 2-PYRROLIDINE BEING LESS THAN 2.6: 1. / P P THE INVENTION FINDS ITS MAIN APPLICATION IN FLUIDS FOR THE MAINTENANCE OF OIL WELLS. / P