Underground pipe storage loop

Details Underground pipe storage loop Underground pipe storage loop

F - Mech Eng,Light,Heat,Weapons

17

D

F17D 1/02 (2006.01)

Patent

CA 2069542

The method of delivering to and from and storing in a pipe loop two different high vapor pressure hydrocarbons, the pipe loop having a first leg and a second leg, the first leg and second leg of the pipe loop being respectively connected to a main pipeline, a displaceable hatching pig in the pipe loop for separating the first and second high vapor pressure hydrocarbons on either side of the displaceable hatching pig in the pipe loop, means for delivering high vapor pressure hydrocarbons to and from the main pipeline to either leg of the loop on either side of said displaceable batching pig, the method comprising the steps of receiving one type of high vapor pressure hydrocarbons on one side of said displaceable hatching pig while simultaneously displacing an equal quantity of a second type of high vapor pressure hydrocarbons from the opposite side of said displaceable hatching pig while the displaceable batching pig is moved away from the end of the elongated pipe loop receiving the first type of high vapor pressure hydrocarbons towards the end of the pipe loop from which the second type of high vapor pressure hydrocarbons is being delivered, terminating the delivery of the second type of high vapor pressure hydrocarbons and commencing receipt of the second type of high vapor pressure hydrocarbons in the end of the pipe loop previously delivering the second type of high vapor pressure hydrocarbons, terminating the receipt of the first type of high vapor pressure hydrocarbons in the opposite end of the pipe loop and delivering the second type of high vapor pressure hydrocarbons to the main pipeline from the end of the pipe loop previously receiving the first type of high vapor pressure hydrocarbons while the displaceable batching pig moves from the end of the pipe loop now receiving the second type of high vapor pressure hydrocarbons towards the end of the pipe loop from which the first type of high vapor pressure hydrocarbons is now being delivered.

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