Isolation packer for well pump

Claim 1

A PACKER FOR ISOLATING THE PORTION OF AN ELECTRIC CABLE EXTENDING UPWARDLY FROM AN OPERATING UNIT IN A WELL CASING PAST THE PACKER AND BEYOND THE LATTER TOWARD THE SURFACE IN THE SPACE BETWEEN THE WELL CASING AND THE TUBING STRING, FROM THE WELL FLUID IN SAID CASING BELOW THE PACKER, SAID PACKER COMPRISING A TUBULAR MANDREL HAVING A FLUID BORE FOR CONNECTING THE BORE OF THE TUBING STRING WITH THE BORE OF AN OPERATING UNIT LOCATED BELOW SAID PACKER, A CABLE CONDUIT LOCATED IN SAID MANDREL BORE AND EXTENDING LENGTHWISE THEREOF, THE ENDS OF SAID CABLE CONDUIT EXTENDING INTO TRANSVERSE PASSAGEWAYS PROVIDED THROUGH THE WALL OF SAID MANDREL ADJACENT TO THE UPPER AND LOWER ENDS OF THE LATTER, WHEREBY THERE IS PROVIDED IN SAID MANDREL BORE A LONGITUDINALLY EXTENDING CABLE CONDUIT WHICH IS ISOLATED FROM SUCH BORE AND WHICH IS IN COMMUNICATION AT ITS UPPER AND LOWER ENDS WITH THE SPACE BETWEEN THE WELL CASING AND THE TUBING STRING AND PACKER, MEANS SEALING SAID UPPER AND LOWER CABLE CONDUIT ENDS IN SAID PASSAGEWAYS AGAINST THE WELL FLUID IN SAID MANDREL BORE, MEANS SEALING THE LOWER END OF SAID CABLE CONDUIT AGAINST ENTRY INTO SAID CABLE CONDUIT OF THE WELL FLUID IN SAID CASING BELOW THE PACKER, A PACKING ELEMENT MOUNTED ON SAID MANDREL BETWEEN THE UPPER AND LOWER ENDS OF SAID CABLE CONDUIT, AND PACKER SETTING MEANS OPERATIVELY ASSOCIATED WITH SAID PACKING ELEMENT AND LOCATED ON SAID MANDREL BETWEEN SAID UPPER AND LOWER ENDS OF SAID CABLE CONDUIT.