Oil wells are producing fluid over time that needs to be removed. The fluid buildup happens when it is drilled the first time, drillers should create a “frac” to open zones for future swabbing. Click here for more information: https://www.swabpro.ca/swabpro.php?Action=1&k=oilfield-swabbing-grande-prairie&PageID=269812 https://www.swabpro.ca/swabpro.php?Action=1&k=oilfield-swabbing-grande-prairie&PageID=269812