Natural gas extractor

The natural gas extractor is a machine whose job is to extract natural gas, from a   natural gas ore. The ores appear far underground (below y=7), and take up a whole chunk. You place the extractor directly on top of any gas block, and it automatically connects to the entire gas chunk. You can then pump the gas out of the top side (with a pump for example). It yields about 16-26 barrels of gas per gas chunk.