No well shall be swabbed before a device, commonly known as a lubricator, has been placed on the flow casing, above all outlets or flow lines of such well, such lubricator to be equipped with an adequate oil saver or stuffing box at the top of the same. The total inside length of the lubricator shall be not less than five feet more than the total length of the swab and turn-back on swab lines. The lubricator shall be of sufficient size to permit the escape of fluid around the swab into the well and shall have a nipple not less than two inches in diameter or more than four inches in length placed on the flow line between the gate valve on such flow line and the flow casings.
(Ord. 907. Passed 9-26-77.)