Apparatus and arrangement for intermittently producing a well and simultaneously scraping the well pipe

Claim 1

AN ARRANGEMENT FOR INTERMITTENTLY FLOWING WELL FLUID IN A WELL PIPE INCLUDING, VALVE MEANS IN THE WELL PIPE TO OPEN AND CLOSE THE WELL PIPE TO THE FLOW OF WELL FLUIDS THERETHROUGH, FLUID PRESSURE SENSITIVE MEANS CONNECTED TO SAID VALVE MEANS AND OPERABLE BY FLUID PRESSURE TO OPEN SAID VALVE, A SOURCE OF PRESSURE FLUID FOR ACTUATING SAID PRESSURE SENSITIVE MEANS ASSOCIATED WITH SAID FLUID SENSITIVE MEANS FOR INTERMITTENTLY OPENING SAID FLUID SENSITIVE MEANS TO ACTUATION BY PRESSURE FLUID FROM SAID SOURCE TO THEREBY OPEN SAID VALVE MEANS, RELEASING MEANS OPERATIVELY CONNECTED TO SAID FLUID PRESSURE SENSITIVE MEANS TO REDUCE THE PRESSURE FLUID ACTING ON SAID PRESSURE SENSITIVE MEANS TO CLOSE SAID VALVE MEANS, PISTON MEANS WITHIN THE WELL PIPE AND MOVABLE LONGITUDINALLY THERETHROUGH WHEN SAID VALVE MEANS IS OPEN TO FLOW WELL FLUIDS, SAID RELEASING MEANS HAVING A LATERALLY SLIDABLE PLUNGER MEANS EXTENDING INTO THE WELL PIPE AND SLIDABLE LATERALLY BY ENGAGEMENT WITH SAID PISTON MEANS AS IT MOVES LONGITUDINALLY THROUGH THE WELL PIPE TO ACTUATE SAID RELEASING MEANS TO RELEASE THE PRESSURE FROM SAID PRESSURE SENSITIVE MEANS WHEREBY SAID VALVE MEANS IN THE WELL PIPE MAY MOVE TO CLOSED POSITION, SAID RELEASING MEANS ALSO INCLUDING MEANS FOR COMMUNICATING BOTH ENDS OF THE PLUNGER MEANS WITH THE WELL PRESSURE WHEREBY THE PLUNGER MEANS IS UNAFFECTED BY THE PRESSURE OF THE WELL FLUID.