Oil tunnel like the Keystone XL

noun

1. A line of pipe with pumps, valves, and control devices for conveying liquids, gases, or finely divided solids
2. Pipe
3. A direct channel for information
4. A process or channel of supply

   "an arms pipeline"

5. A state of development, preparation, or production

   "several projects in the pipeline"

6. A course of individual advancement or development especially to fill organizational needs

geographical name

1. Pipeline that came into use in 1977 to carry oil 853 miles (1372 kilometers) across Alaska from fields in the area of Prudhoe Bay in the north to the port of Valdez in the south

noun

1. The system for developing and producing something

   "the next wave of products to come down the pipeline"