This drawing is simpler and a little more to scale, plus it also shows some of the larger surface features of an active gas well. These surface features/equipment include: The well head and its ipes connected on the top of the casing and tubing. A tank for oil at an oil well or at a gas well sometimes for brine or other liquids that sometimes comes up with the gas from some formations/locations. Some kind of metering/measuring system. The pipeline gathering the gas from the well and piping it to market. (An oil well would also have a big suspended arm rocked back and for the called a “pump-jack”, and it would have either a tank for the oil or a pipeline to a tank for oil from several wells.) Other features such as a pit for drilling fluids were there during the drilling, but have been removed once the well is ready for production.