摘要 |
The invention provides devices and methods for collecting vapor gas generated by an oil-containing material within a production tank. The devices and associated methods result in produced oil having a reduced level of dissolved hydrocarbons and recovery of vapor gas for resale. The devices include vapor recovery units connected to conventional oil-production units so that a conventional unit is converted to a low emission unit. In an embodiment, the device is a column separator comprising a perforated, packed spiral baffle with one end that receives vapor gas and a second end for removing gas that has traversed the length of the column separator. Also provided are methods for converting an oil-production unit into a low-emission oil production unit using any of the devices disclosed herein.
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