Recently a Toolpusher performed a gas test on the Nitrogen(N2) bottles on location. One nitrogen bottle was found to contain Oxygen (O2). The bottle had the proper fittings and was marked Nitrogen. In several other international areas where the Oxygen (O2) and Nitrogen (N2) bottles are identical Oxygen was also found in bottles marked “Nitrogen”. If a N2 bottle containing O2 is used to charge equipment such as a mud pump pulsation dampener it could lead to potential loss of life and/or equipment damage.