Wire line tool for use in wells

Claim 1

APPARATUS FOR USE IN SQUEEZING A LIQUID THROUGH PERFORATIONS IN A PERFORATED PIPE STRING COMPRISING: AN ELONGATED MANDREL HAVING A BORE TO PROVIDE FLUID PASSAGE BETWEEN LONGITUDINALLY SPACED LOCATIONS THEREON; MEANS CONNECTED TO THE UPPER END OF SAID MANDREL FOR LOWERING SAID MANDREL INTO SAID PIPE STRING; FIRST MEANS INCLUDING ANNULAR CUP SEALING MEANS AFFIXED TO THE LOWER PORTION OF SAID MANDREL TO SEAL THE SPACE BETWEEN THE INNER WALL OF THE PIPE STRING AND SAID MANDREL ABOVE THE LOWER OF SAID SPACED-APART LOCATIONS; A TUBULAR OUTER MEMBER AROUND SAID MANDREL ABUTTING AGAINST SAID FIRST MEANS AND SUPPORTED THEREON, TO FORM A CONTAINER FOR A LIQUID WITH SAID MANDREL AND SAID FIRST MEANS, SAID OUTER MEMBER HAVING AN OPENING THEREIN THROUGH WHICH FLUID PRESSURE MAY BE EXERTED ON LIQUID CONTAINED THEREIN; ANCHORING MEANS CONNECTED TO SAID OUTER MEMBER, ADAPTED TO RELEASABLY ANCHOR SAID OUTER MEMBER AGAINST FURTHER DOWNWARD MOVEMENT AT A SELECTED DEPTH IN THE PIPE STRING ABOVE THE PERFORATIONS SO THAT SAID MANDREL AND FIRST MEANS MAY DROP AWAY FROM SAID OUTER MEMBER TO POSITION SAID FIRST MEANS BELOW THE PERFORATIONS; AND MEANS ON SAID OUTER MEMBER FOR SEALING THE ANNULAR SPACE BETWEEN SAID OUTER MEMBER AND THE PIPE STRING WHEREBY HYDRAULIC PRESSURE EXERTED ON THE LIQUID WILL FORCE THE LIQUID THROUGH THE PERFORATIONS.