That's the topic of an interesting article at Forbes.com. For example: "But there are still lots of ways to play the shale boom, including pipeline companies, chemicals giants like Dow and smaller companies like Twin Disc, which sells compressors to push the gas through the interstate pipeline system. The Interstate Natural Gas Association of America estimates $5.7 billion a year, or more than $140 billion, will be spent on gathering systems, interstate lines, and compression and processing equipment through 2035."