Means for injecting treating chemicals into an oil well flow line

Claim 1

APPARATUS FOR INTRODUCING CONTROLLED QUANTITIES OF TREATING CHEMICALS INTO AN OIL WELL FLOW LINE DISCHARGING INTO AN EMULSION SEPARATOR TANK COMPRISING A WELL PUMP, A VALVE HOUSING A MOUNTED ON SAID FLOW LINE, SAID HOUSING BEING COMPRISED OF A UPPER DETACHABLE CYLINDER PORTION AND A LOWER CYLINDER PORTION, A SERIES OF PORTS PROVIDING COMMUNICATION BETWEEN SAID UPPER AND LOWER CYLINDER PORTIONS OF SAID HOUSING, A MAIN VALVE NORMALLY CLOSING THE OPEN END OF SAID LOWER CYLINDER PORTION, A PARTIALLY THREADED VALVE STEM EXTENDING FROM SAID VALVE THROUGH SAID HOUSING INTO SAID UPPER CYLINDER PORTION, A SPRING SURROUNDING SAID STEM IN THE UPPER CYLINDER PORTION OF SAID HOUSING, MEANS ON THE THREADED PORTION OF SAID STEM TO VARY THE COMPRESSION OF SAID SPRING AND CONTROL THE FORCE REQUIRED TO UNSEAT SAID VALVE, A RESERVOIR CONTAINER DETACHABLY MOUNTED ON THE FREE END OF SAID UPPER CYLINDER PORTION BY MEANS OF FITTING MEMBER CORRESPONDING TO THE INNER DIAMETER OF SAID UPPER CYLINDER PORTION OF SAID HOUSING, SAID FITTING BEING PROVIDED WITH A THREADED SOCKET HAVING A NEEDLE VALVE SEAT COMMUNICATING WITH SAID UPPER CYLINDER PORTION OF SAID HOUSING, AN ADJUSTABLE NEEDLE VALVE EXTENDING THROUGH SAID RESERVOIR CONTAINER AND SEATED ON SAID SEAT IN SAID THREADED SOCKET WHEN SAID RESERVOIR CONTAINER IS MOUNTED THEREON, A SERIES OF SIGHT PORTS IN SAID UPPER CYLINDER PORTION WHEREBY THE DISCHARGE OF TREATING CHEMICALS FROM SAID CONTAINER TO SAID UPPER CYLINDER PORTION OF THE HOUSING MAY BE VISUALLY OBSERVED FOR ADJUSTMENT OF SAID NEEDLE VALVE HAVING CONTROL THEREOF, SAID MAIN VALVE BEING PERIODICALLY OPENED TO DISCHARGE TREATING CHEMICALS INTO SAID FLOW LINE BY THE INTERMITTENT VACUUM CREATED IN SAID FLOW LINE BY THE MOTION OF SAID WELL PUMP.