Natural gas seeks support on the decreasing number of drilling rings. The number of rings in the US declined to 818 in the previous week as compared to 934 in the preceding week; the number of rings is lowered with the aim to control ample supply in the commodity market. Investors also anticipate the US Natural Gas inventory report due on Thursday. Traders expect 103Bcf decrease in stockpiles. Currently, natural gas futures for January delivery traded at USD3.171 per million British thermal units.